Moved from a file-based TLE storage to a Room-based one. Fixed entries selection issue.

app/build.gradle

@@ -72,6 +72,7 @@ dependencies {
     implementation "androidx.lifecycle:lifecycle-extensions:$lifecycle"
     implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle"
     implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle"
+    implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle"
 
     // room
     implementation "androidx.room:room-runtime:$room"

app/src/main/java/com/rtbishop/look4sat/Look4SatApp.kt

@@ -20,8 +20,8 @@
 package com.rtbishop.look4sat
 
 import android.app.Application
-import com.rtbishop.look4sat.di.AppComponent
-import com.rtbishop.look4sat.di.DaggerAppComponent
+import com.rtbishop.look4sat.dagger.AppComponent
+import com.rtbishop.look4sat.dagger.DaggerAppComponent
 
 class Look4SatApp : Application() {
 

app/src/main/java/com/rtbishop/look4sat/MainViewModel.kt

@@ -1,176 +0,0 @@
-/*
- * Look4Sat. Amateur radio and weather satellite tracker and passes predictor for Android.
- * Copyright (C) 2019, 2020 Arty Bishop (bishop.arty@gmail.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-package com.rtbishop.look4sat
-
-import android.app.Application
-import androidx.lifecycle.AndroidViewModel
-import androidx.lifecycle.LiveData
-import androidx.lifecycle.MutableLiveData
-import androidx.lifecycle.viewModelScope
-import com.github.amsacode.predict4java.GroundStationPosition
-import com.github.amsacode.predict4java.SatNotFoundException
-import com.github.amsacode.predict4java.TLE
-import com.rtbishop.look4sat.predict4kotlin.PassPredictor
-import com.rtbishop.look4sat.repo.Repository
-import com.rtbishop.look4sat.repo.SatPass
-import com.rtbishop.look4sat.repo.Transmitter
-import com.rtbishop.look4sat.utility.DataManager
-import com.rtbishop.look4sat.utility.PrefsManager
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.Job
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
-import java.io.IOException
-import java.util.*
-import javax.inject.Inject
-
-class MainViewModel(application: Application) : AndroidViewModel(application) {
-
-    private val app = application
-    private val urlList = listOf("https://celestrak.com/NORAD/elements/active.txt")
-    private val _satPassList = MutableLiveData<MutableList<SatPass>>()
-    private val _debugMessage = MutableLiveData<String>()
-    private val _gsp = MutableLiveData<GroundStationPosition>()
-    private val _isListRefreshing = MutableLiveData<Boolean>()
-    private var calculationJob: Job? = null
-
-    @Inject
-    lateinit var repository: Repository
-    @Inject
-    lateinit var dataManager: DataManager
-    @Inject
-    lateinit var prefsManager: PrefsManager
-
-    init {
-        (app as Look4SatApp).appComponent.inject(this)
-        setGroundStationPosition()
-    }
-
-    var isFirstLaunch = true
-    var tleMainList = dataManager.loadTleList()
-    var tleSelection = dataManager.loadSelectionList()
-
-    fun getGSP(): LiveData<GroundStationPosition> = _gsp
-    fun getDebugMessage(): LiveData<String> = _debugMessage
-    fun getSatPassList(): LiveData<MutableList<SatPass>> = _satPassList
-    fun getRefreshing(): LiveData<Boolean> = _isListRefreshing
-    fun getRefreshRate() = prefsManager.getRefreshRate()
-    fun getHoursAhead() = prefsManager.getHoursAhead()
-    fun getMinElevation() = prefsManager.getMinElevation()
-    fun setGroundStationPosition() = _gsp.postValue(prefsManager.getGroundStationPosition())
-
-    fun updateLocation() {
-        dataManager.getLastKnownLocation()?.let {
-            prefsManager.setGroundStationPosition(it)
-            _gsp.postValue(it)
-        }
-    }
-
-    fun setPassPrefs(hoursAhead: Int, minEl: Double) {
-        prefsManager.setHoursAhead(hoursAhead)
-        prefsManager.setMinElevation(minEl)
-    }
-
-    fun updateAndSaveTleFile() {
-        viewModelScope.launch(Dispatchers.IO) {
-            try {
-                val inputStream = repository.getStreamForUrl(urlList)
-                val tleList = TLE.importSat(inputStream).apply { sortBy { it.name } }
-                dataManager.saveTleList(tleList)
-                tleMainList = tleList
-                updateAndSaveSelectionList(mutableListOf())
-                _debugMessage.postValue(app.getString(R.string.update_tle_success))
-            } catch (exception: IOException) {
-                _debugMessage.postValue(app.getString(R.string.update_failure))
-            }
-        }
-    }
-
-    fun updateTransmittersDatabase() {
-        viewModelScope.launch(Dispatchers.IO) {
-            try {
-                repository.updateTransmittersDatabase()
-                _debugMessage.postValue(app.getString(R.string.update_trans_success))
-            } catch (exception: IOException) {
-                _debugMessage.postValue(app.getString(R.string.update_failure))
-            }
-        }
-    }
-
-    fun updateAndSaveSelectionList(list: MutableList<Int>) {
-        tleSelection = list
-        dataManager.saveSelectionList(list)
-    }
-
-    fun getPasses() {
-        _isListRefreshing.value = true
-        calculationJob?.cancel()
-        var passList = mutableListOf<SatPass>()
-        calculationJob = viewModelScope.launch {
-            if (tleMainList.isNotEmpty() && tleSelection.isNotEmpty()) {
-                withContext(Dispatchers.Default) {
-                    val dateNow = Date()
-                    tleSelection.forEach { indexOfSelection ->
-                        val tle = tleMainList[indexOfSelection]
-                        try {
-                            val gsp = getGSP().value ?: GroundStationPosition(0.0, 0.0, 0.0)
-                            val predictor = PassPredictor(tle, gsp)
-                            val passes = predictor.getPasses(dateNow, getHoursAhead(), true)
-                            passes.forEach {
-                                passList.add(SatPass(tle, predictor, it))
-                            }
-                        } catch (exception: IllegalArgumentException) {
-                            _debugMessage.postValue(app.getString(R.string.err_parse_tle))
-                        } catch (exception: SatNotFoundException) {
-                            _debugMessage.postValue(app.getString(R.string.err_sat_wont_pass))
-                        }
-                    }
-                    passList = filterAndSortList(passList, getHoursAhead())
-                }
-                _satPassList.postValue(passList)
-            } else {
-                _satPassList.postValue(mutableListOf())
-                _debugMessage.postValue(app.getString(R.string.err_no_sat_selected))
-            }
-            _isListRefreshing.value = false
-        }
-    }
-
-    private fun filterAndSortList(
-        list: MutableList<SatPass>,
-        hoursAhead: Int
-    ): MutableList<SatPass> {
-        val dateNow = Date()
-        val dateFuture = Calendar.getInstance().let {
-            it.time = dateNow
-            it.add(Calendar.HOUR, hoursAhead)
-            it.time
-        }
-        list.removeAll { it.pass.startTime.after(dateFuture) }
-        list.removeAll { it.pass.endTime.before(dateNow) }
-        list.removeAll { it.pass.maxEl < getMinElevation() }
-        list.sortBy { it.pass.startTime }
-        return list
-    }
-
-    suspend fun getTransmittersForSat(id: Int): List<Transmitter> {
-        return repository.getTransmittersForSat(id)
-    }
-}

app/src/main/java/com/rtbishop/look4sat/dagger/AppComponent.kt

@@ -17,16 +17,23 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.di
+package com.rtbishop.look4sat.dagger
 
 import android.content.Context
-import com.rtbishop.look4sat.MainViewModel
+import com.rtbishop.look4sat.dagger.modules.*
+import com.rtbishop.look4sat.ui.MainActivity
+import com.rtbishop.look4sat.ui.fragments.MapViewFragment
+import com.rtbishop.look4sat.ui.fragments.PassListFragment
+import com.rtbishop.look4sat.ui.fragments.PolarViewFragment
 import dagger.BindsInstance
 import dagger.Component
 import javax.inject.Singleton
 
 @Singleton
-@Component(modules = [AndroidModule::class, NetworkModule::class, StorageModule::class, UtilityModule::class])
+@Component(
+    modules = [NetworkModule::class, PersistenceModule::class,
+        RepoModule::class, UtilityModule::class, ViewModelModule::class]
+)
 interface AppComponent {
 
     @Component.Factory
@@ -34,5 +41,8 @@ interface AppComponent {
         fun create(@BindsInstance context: Context): AppComponent
     }
 
-    fun inject(viewModel: MainViewModel)
+    fun inject(mainActivity: MainActivity)
+    fun inject(mapViewFragment: MapViewFragment)
+    fun inject(passListFragment: PassListFragment)
+    fun inject(polarViewFragment: PolarViewFragment)
 }

app/src/main/java/com/rtbishop/look4sat/dagger/ViewModelFactory.kt

@@ -0,0 +1,25 @@
+package com.rtbishop.look4sat.dagger
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import javax.inject.Inject
+import javax.inject.Provider
+import javax.inject.Singleton
+
+@Singleton
+class ViewModelFactory @Inject constructor(
+    private val creators: Map<Class<out ViewModel>,
+            @JvmSuppressWildcards Provider<ViewModel>>
+) : ViewModelProvider.Factory {
+    override fun <T : ViewModel?> create(modelClass: Class<T>): T {
+        val creator = creators[modelClass] ?: creators.entries.firstOrNull {
+            modelClass.isAssignableFrom(it.key)
+        }?.value ?: throw IllegalArgumentException("Unsupported ViewModel class: $modelClass")
+        try {
+            @Suppress("UNCHECKED_CAST")
+            return creator.get() as T
+        } catch (e: Exception) {
+            throw RuntimeException(e)
+        }
+    }
+}

app/src/main/java/com/rtbishop/look4sat/dagger/ViewModelKey.kt

@@ -0,0 +1,14 @@
+package com.rtbishop.look4sat.dagger
+
+import androidx.lifecycle.ViewModel
+import dagger.MapKey
+import kotlin.reflect.KClass
+
+@Target(
+    AnnotationTarget.FUNCTION,
+    AnnotationTarget.PROPERTY_GETTER,
+    AnnotationTarget.PROPERTY_SETTER
+)
+@Retention(AnnotationRetention.RUNTIME)
+@MapKey
+annotation class ViewModelKey(val value: KClass<out ViewModel>)

app/src/main/java/com/rtbishop/look4sat/dagger/modules/NetworkModule.kt

@@ -17,8 +17,10 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.di
+package com.rtbishop.look4sat.dagger.modules
 
+import com.rtbishop.look4sat.network.RemoteDataSource
+import com.rtbishop.look4sat.network.RemoteSource
 import com.rtbishop.look4sat.network.TransmittersApi
 import dagger.Module
 import dagger.Provides
@@ -30,6 +32,18 @@ import javax.inject.Singleton
 @Module
 class NetworkModule {
 
+    @Singleton
+    @Provides
+    fun provideOkHttpClient(): OkHttpClient {
+        return OkHttpClient()
+    }
+
+    @Singleton
+    @Provides
+    fun provideRemoteDataSource(api: TransmittersApi, client: OkHttpClient): RemoteSource {
+        return RemoteDataSource(api, client)
+    }
+
     @Singleton
     @Provides
     fun provideTransmittersApi(): TransmittersApi {
@@ -39,10 +53,4 @@ class NetworkModule {
             .build()
             .create(TransmittersApi::class.java)
     }
-
-    @Singleton
-    @Provides
-    fun provideOkHttpClient(): OkHttpClient {
-        return OkHttpClient()
-    }
 }

app/src/main/java/com/rtbishop/look4sat/dagger/modules/PersistenceModule.kt

@@ -17,29 +17,47 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.di
+package com.rtbishop.look4sat.dagger.modules
 
 import android.content.Context
 import androidx.room.Room
-import com.rtbishop.look4sat.storage.TransmittersDao
-import com.rtbishop.look4sat.storage.TransmittersDb
+import com.rtbishop.look4sat.persistence.LocalDataSource
+import com.rtbishop.look4sat.persistence.LocalSource
+import com.rtbishop.look4sat.persistence.SatelliteDb
+import com.rtbishop.look4sat.persistence.dao.EntriesDao
+import com.rtbishop.look4sat.persistence.dao.TransmittersDao
 import dagger.Module
 import dagger.Provides
 import javax.inject.Singleton
 
 @Module
-class StorageModule {
+class PersistenceModule {
 
     @Singleton
     @Provides
-    fun provideTransmittersDb(context: Context): TransmittersDb {
-        return Room.databaseBuilder(context, TransmittersDb::class.java, "transmitters")
-            .build()
+    fun provideEntriesDao(db: SatelliteDb): EntriesDao {
+        return db.entriesDao()
     }
 
     @Singleton
     @Provides
-    fun provideTransmittersDao(db: TransmittersDb): TransmittersDao {
+    fun provideTransmittersDao(db: SatelliteDb): TransmittersDao {
         return db.transmittersDao()
     }
+
+    @Singleton
+    @Provides
+    fun provideLocalDataSource(
+        entriesDao: EntriesDao,
+        transmittersDao: TransmittersDao
+    ): LocalSource {
+        return LocalDataSource(entriesDao, transmittersDao)
+    }
+
+    @Singleton
+    @Provides
+    fun provideSatelliteDb(context: Context): SatelliteDb {
+        return Room.databaseBuilder(context, SatelliteDb::class.java, "satellites")
+            .build()
+    }
 }

app/src/main/java/com/rtbishop/look4sat/dagger/modules/RepoModule.kt

@@ -0,0 +1,19 @@
+package com.rtbishop.look4sat.dagger.modules
+
+import com.rtbishop.look4sat.network.RemoteSource
+import com.rtbishop.look4sat.persistence.LocalSource
+import com.rtbishop.look4sat.repo.DefaultRepository
+import com.rtbishop.look4sat.repo.Repository
+import dagger.Module
+import dagger.Provides
+import javax.inject.Singleton
+
+@Module
+class RepoModule {
+
+    @Singleton
+    @Provides
+    fun provideDefaultRepository(localSource: LocalSource, remoteSource: RemoteSource): Repository {
+        return DefaultRepository(localSource, remoteSource)
+    }
+}

app/src/main/java/com/rtbishop/look4sat/dagger/modules/UtilityModule.kt

@@ -17,18 +17,19 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.di
+package com.rtbishop.look4sat.dagger.modules
 
 import android.content.Context
 import android.content.SharedPreferences
 import android.location.LocationManager
 import androidx.preference.PreferenceManager
+import com.rtbishop.look4sat.utility.PrefsManager
 import dagger.Module
 import dagger.Provides
 import javax.inject.Singleton
 
 @Module
-class AndroidModule {
+class UtilityModule {
 
     @Singleton
     @Provides
@@ -41,4 +42,13 @@ class AndroidModule {
     fun provideLocationManager(context: Context): LocationManager {
         return context.getSystemService(Context.LOCATION_SERVICE) as LocationManager
     }
+
+    @Singleton
+    @Provides
+    fun providePrefsManager(
+        sharedPreferences: SharedPreferences,
+        locationManager: LocationManager
+    ): PrefsManager {
+        return PrefsManager(sharedPreferences, locationManager)
+    }
 }

app/src/main/java/com/rtbishop/look4sat/dagger/modules/ViewModelModule.kt

@@ -0,0 +1,22 @@
+package com.rtbishop.look4sat.dagger.modules
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import com.rtbishop.look4sat.dagger.ViewModelFactory
+import com.rtbishop.look4sat.dagger.ViewModelKey
+import com.rtbishop.look4sat.ui.SharedViewModel
+import dagger.Binds
+import dagger.Module
+import dagger.multibindings.IntoMap
+
+@Module
+abstract class ViewModelModule {
+
+    @Binds
+    @IntoMap
+    @ViewModelKey(SharedViewModel::class)
+    abstract fun bindSharedViewModel(viewModel: SharedViewModel): ViewModel
+
+    @Binds
+    abstract fun bindViewModelFactory(factory: ViewModelFactory): ViewModelProvider.Factory
+}

app/src/main/java/com/rtbishop/look4sat/data/SatEntry.kt

@@ -0,0 +1,12 @@
+package com.rtbishop.look4sat.data
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import com.github.amsacode.predict4java.TLE
+
+@Entity(tableName = "entries")
+data class SatEntry(val tle: TLE, var isSelected: Boolean = false) {
+    @PrimaryKey
+    var catNum: Int = tle.catnum
+    var name: String = tle.name
+}

app/src/main/java/com/rtbishop/look4sat/data/SatPass.kt

@@ -17,11 +17,11 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.repo
+package com.rtbishop.look4sat.data
 
 import com.github.amsacode.predict4java.SatPassTime
 import com.github.amsacode.predict4java.TLE
-import com.rtbishop.look4sat.predict4kotlin.PassPredictor
+import com.rtbishop.look4sat.utility.PassPredictor
 
 data class SatPass(
     val tle: TLE,

app/src/main/java/com/rtbishop/look4sat/data/Transmitter.kt

@@ -17,7 +17,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.repo
+package com.rtbishop.look4sat.data
 
 import androidx.room.Entity
 import androidx.room.PrimaryKey
@@ -34,5 +34,5 @@ data class Transmitter(
     @SerializedName("downlink_high") val downlinkHigh: Long?,
     @SerializedName("mode") val mode: String?,
     @SerializedName("invert") val isInverted: Boolean,
-    @SerializedName("norad_cat_id") val noradCatId: Int
+    @SerializedName("norad_cat_id") val catNum: Int
 )

app/src/main/java/com/rtbishop/look4sat/di/UtilityModule.kt

@@ -1,45 +0,0 @@
-/*
- * Look4Sat. Amateur radio and weather satellite tracker and passes predictor for Android.
- * Copyright (C) 2019, 2020 Arty Bishop (bishop.arty@gmail.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-package com.rtbishop.look4sat.di
-
-import android.content.Context
-import android.content.SharedPreferences
-import android.location.LocationManager
-import com.rtbishop.look4sat.utility.DataManager
-import com.rtbishop.look4sat.utility.PrefsManager
-import dagger.Module
-import dagger.Provides
-import javax.inject.Singleton
-
-@Module
-class UtilityModule {
-
-    @Singleton
-    @Provides
-    fun providePrefsManager(preferences: SharedPreferences): PrefsManager {
-        return PrefsManager(preferences)
-    }
-
-    @Singleton
-    @Provides
-    fun provideDataManager(locationManager: LocationManager, context: Context): DataManager {
-        return DataManager(locationManager, context)
-    }
-}

app/src/main/java/com/rtbishop/look4sat/network/RemoteDataSource.kt

@@ -19,11 +19,13 @@
 
 package com.rtbishop.look4sat.network
 
-import com.rtbishop.look4sat.repo.Transmitter
+import android.util.Log
+import com.rtbishop.look4sat.data.Transmitter
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import okhttp3.OkHttpClient
 import okhttp3.Request
+import java.io.IOException
 import java.io.InputStream
 import java.io.SequenceInputStream
 import java.util.*
@@ -32,20 +34,25 @@ import javax.inject.Inject
 class RemoteDataSource @Inject constructor(
     private val api: TransmittersApi,
     private val client: OkHttpClient
-) {
-    suspend fun getStreamForUrl(urlList: List<String>): InputStream {
+) : RemoteSource {
+
+    override suspend fun fetchTleStream(urlList: List<String>): InputStream {
         val streamTable = Hashtable<String, InputStream>()
-        withContext(Dispatchers.IO) {
-            urlList.forEach {
-                val request = Request.Builder().url(it).build()
-                val stream = client.newCall(request).execute().body()?.byteStream()!!
-                streamTable[it] = stream
+        try {
+            withContext(Dispatchers.IO) {
+                urlList.forEach {
+                    val request = Request.Builder().url(it).build()
+                    val stream = client.newCall(request).execute().body()?.byteStream()
+                    streamTable[it] = stream
+                }
             }
+        } catch (e: IOException) {
+            Log.w("remoteDataSource", e.toString())
         }
         return SequenceInputStream(streamTable.elements())
     }
 
-    suspend fun fetchTransmittersList(): List<Transmitter> {
-        return api.fetchTransmittersList()
+    override suspend fun fetchTransmitters(): List<Transmitter> {
+        return api.fetchTransmitters()
     }
 }

app/src/main/java/com/rtbishop/look4sat/network/RemoteSource.kt

@@ -0,0 +1,11 @@
+package com.rtbishop.look4sat.network
+
+import com.rtbishop.look4sat.data.Transmitter
+import java.io.InputStream
+
+interface RemoteSource {
+
+    suspend fun fetchTleStream(urlList: List<String>): InputStream
+
+    suspend fun fetchTransmitters(): List<Transmitter>
+}

app/src/main/java/com/rtbishop/look4sat/network/TransmittersApi.kt

@@ -19,11 +19,11 @@
 
 package com.rtbishop.look4sat.network
 
-import com.rtbishop.look4sat.repo.Transmitter
+import com.rtbishop.look4sat.data.Transmitter
 import retrofit2.http.GET
 
 interface TransmittersApi {
 
     @GET("transmitters/")
-    suspend fun fetchTransmittersList(): List<Transmitter>
+    suspend fun fetchTransmitters(): List<Transmitter>
 }

app/src/main/java/com/rtbishop/look4sat/persistence/LocalDataSource.kt

@@ -0,0 +1,58 @@
+/*
+ * Look4Sat. Amateur radio and weather satellite tracker and passes predictor for Android.
+ * Copyright (C) 2019, 2020 Arty Bishop (bishop.arty@gmail.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+package com.rtbishop.look4sat.persistence
+
+import com.rtbishop.look4sat.data.SatEntry
+import com.rtbishop.look4sat.data.Transmitter
+import com.rtbishop.look4sat.persistence.dao.EntriesDao
+import com.rtbishop.look4sat.persistence.dao.TransmittersDao
+import javax.inject.Inject
+
+class LocalDataSource @Inject constructor(
+    private val entriesDao: EntriesDao,
+    private val transmittersDao: TransmittersDao
+) : LocalSource {
+
+    override suspend fun insertEntries(entries: List<SatEntry>) {
+        entriesDao.insertEntries(entries)
+    }
+
+    override suspend fun getAllEntries(): List<SatEntry> {
+        return entriesDao.getAllEntries()
+    }
+
+    override suspend fun getSelectedEntries(): List<SatEntry> {
+        return entriesDao.getSelectedEntries()
+    }
+
+    override suspend fun updateEntriesSelection(entries: List<SatEntry>) {
+        entriesDao.updateEntriesSelection(entries)
+    }
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+
+    override suspend fun insertTransmitters(transmitters: List<Transmitter>) {
+        transmittersDao.insertTransmitters(transmitters)
+    }
+
+    override suspend fun getTransmittersByCatNum(catNum: Int): List<Transmitter> {
+        return transmittersDao.getTransmittersByCatNum(catNum)
+    }
+}

app/src/main/java/com/rtbishop/look4sat/persistence/LocalSource.kt

@@ -0,0 +1,21 @@
+package com.rtbishop.look4sat.persistence
+
+import com.rtbishop.look4sat.data.SatEntry
+import com.rtbishop.look4sat.data.Transmitter
+
+interface LocalSource {
+
+    suspend fun insertEntries(entries: List<SatEntry>)
+
+    suspend fun getAllEntries(): List<SatEntry>
+
+    suspend fun getSelectedEntries(): List<SatEntry>
+
+    suspend fun updateEntriesSelection(entries: List<SatEntry>)
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+
+    suspend fun insertTransmitters(transmitters: List<Transmitter>)
+
+    suspend fun getTransmittersByCatNum(catNum: Int): List<Transmitter>
+}

app/src/main/java/com/rtbishop/look4sat/persistence/SatelliteDb.kt

@@ -17,14 +17,22 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.storage
+package com.rtbishop.look4sat.persistence
 
 import androidx.room.Database
 import androidx.room.RoomDatabase
-import com.rtbishop.look4sat.repo.Transmitter
+import androidx.room.TypeConverters
+import com.rtbishop.look4sat.data.SatEntry
+import com.rtbishop.look4sat.data.Transmitter
+import com.rtbishop.look4sat.persistence.dao.EntriesDao
+import com.rtbishop.look4sat.persistence.dao.TransmittersDao
+import com.rtbishop.look4sat.utility.Converters
 
-@Database(entities = [Transmitter::class], version = 1, exportSchema = false)
-abstract class TransmittersDb : RoomDatabase() {
+@Database(entities = [Transmitter::class, SatEntry::class], version = 1, exportSchema = false)
+@TypeConverters(Converters::class)
+abstract class SatelliteDb : RoomDatabase() {
+
+    abstract fun entriesDao(): EntriesDao
 
     abstract fun transmittersDao(): TransmittersDao
 }

app/src/main/java/com/rtbishop/look4sat/persistence/dao/EntriesDao.kt

@@ -17,20 +17,23 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.storage
+package com.rtbishop.look4sat.persistence.dao
 
-import androidx.room.Dao
-import androidx.room.Insert
-import androidx.room.OnConflictStrategy
-import androidx.room.Query
-import com.rtbishop.look4sat.repo.Transmitter
+import androidx.room.*
+import com.rtbishop.look4sat.data.SatEntry
 
 @Dao
-interface TransmittersDao {
+interface EntriesDao {
 
     @Insert(onConflict = OnConflictStrategy.REPLACE)
-    suspend fun insertTransmitters(transmitters: List<Transmitter>)
+    suspend fun insertEntries(entries: List<SatEntry>)
 
-    @Query("SELECT * FROM transmitters WHERE isAlive = 1 and noradCatId = :id")
-    suspend fun getTransmittersForSat(id: Int): List<Transmitter>
+    @Query("SELECT * FROM entries ORDER BY name ASC")
+    suspend fun getAllEntries(): List<SatEntry>
+
+    @Query("SELECT * FROM entries WHERE isSelected = 1 ORDER BY name ASC")
+    suspend fun getSelectedEntries(): List<SatEntry>
+
+    @Update
+    suspend fun updateEntriesSelection(entries: List<SatEntry>)
 }

app/src/main/java/com/rtbishop/look4sat/persistence/dao/TransmittersDao.kt

@@ -0,0 +1,17 @@
+package com.rtbishop.look4sat.persistence.dao
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+import com.rtbishop.look4sat.data.Transmitter
+
+@Dao
+interface TransmittersDao {
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertTransmitters(transmitters: List<Transmitter>)
+
+    @Query("SELECT * FROM transmitters WHERE isAlive = 1 and catNum = :catNum")
+    suspend fun getTransmittersByCatNum(catNum: Int): List<Transmitter>
+}

app/src/main/java/com/rtbishop/look4sat/repo/DefaultRepository.kt

@@ -0,0 +1,79 @@
+/*
+ * Look4Sat. Amateur radio and weather satellite tracker and passes predictor for Android.
+ * Copyright (C) 2019, 2020 Arty Bishop (bishop.arty@gmail.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+package com.rtbishop.look4sat.repo
+
+import android.util.Log
+import com.github.amsacode.predict4java.TLE
+import com.rtbishop.look4sat.data.SatEntry
+import com.rtbishop.look4sat.data.Transmitter
+import com.rtbishop.look4sat.network.RemoteSource
+import com.rtbishop.look4sat.persistence.LocalSource
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import java.io.IOException
+import javax.inject.Inject
+
+class DefaultRepository @Inject constructor(
+    private val localSource: LocalSource,
+    private val remoteSource: RemoteSource
+) : Repository {
+
+    private val tag = "defaultRepository"
+
+    override suspend fun updateEntriesFrom(urlList: List<String>) {
+        val stream = remoteSource.fetchTleStream(urlList)
+        try {
+            withContext(Dispatchers.IO) {
+                val tleList = TLE.importSat(stream)
+                val entries = tleList.map { SatEntry(it) }
+                localSource.insertEntries(entries)
+            }
+        } catch (e: Exception) {
+            Log.w(tag, e.toString())
+        }
+    }
+
+    override suspend fun getAllEntries(): List<SatEntry> {
+        return localSource.getAllEntries()
+    }
+
+    override suspend fun getSelectedEntries(): List<SatEntry> {
+        return localSource.getSelectedEntries()
+    }
+
+    override suspend fun updateEntriesSelection(entries: List<SatEntry>) {
+        localSource.updateEntriesSelection(entries)
+    }
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+
+    override suspend fun updateTransmitters() {
+        try {
+            val list = remoteSource.fetchTransmitters()
+            localSource.insertTransmitters(list)
+        } catch (e: IOException) {
+            Log.w(tag, e.toString())
+        }
+    }
+
+    override suspend fun getTransmittersByCatNum(catNum: Int): List<Transmitter> {
+        return localSource.getTransmittersByCatNum(catNum)
+    }
+}

app/src/main/java/com/rtbishop/look4sat/repo/Repository.kt

@@ -1,42 +1,21 @@
-/*
- * Look4Sat. Amateur radio and weather satellite tracker and passes predictor for Android.
- * Copyright (C) 2019, 2020 Arty Bishop (bishop.arty@gmail.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
 package com.rtbishop.look4sat.repo
 
-import com.rtbishop.look4sat.network.RemoteDataSource
-import com.rtbishop.look4sat.storage.LocalDataSource
-import java.io.InputStream
-import javax.inject.Inject
+import com.rtbishop.look4sat.data.SatEntry
+import com.rtbishop.look4sat.data.Transmitter
 
-class Repository @Inject constructor(
-    private val localSource: LocalDataSource,
-    private val remoteSource: RemoteDataSource
-) {
-    suspend fun getStreamForUrl(urlList: List<String>): InputStream {
-        return remoteSource.getStreamForUrl(urlList)
-    }
+interface Repository {
 
-    suspend fun updateTransmittersDatabase() {
-        localSource.insertTransmitters(remoteSource.fetchTransmittersList())
-    }
+    suspend fun updateEntriesFrom(urlList: List<String>)
 
-    suspend fun getTransmittersForSat(id: Int): List<Transmitter> {
-        return localSource.getTransmittersForSat(id)
-    }
+    suspend fun getAllEntries(): List<SatEntry>
+
+    suspend fun getSelectedEntries(): List<SatEntry>
+
+    suspend fun updateEntriesSelection(entries: List<SatEntry>)
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+
+    suspend fun updateTransmitters()
+
+    suspend fun getTransmittersByCatNum(catNum: Int): List<Transmitter>
 }

app/src/main/java/com/rtbishop/look4sat/repo/SatEntry.kt

@@ -1,22 +0,0 @@
-/*
- * Look4Sat. Amateur radio and weather satellite tracker and passes predictor for Android.
- * Copyright (C) 2019, 2020 Arty Bishop (bishop.arty@gmail.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-package com.rtbishop.look4sat.repo
-
-data class SatEntry(val id: Int, val name: String, var isSelected: Boolean = false)

app/src/main/java/com/rtbishop/look4sat/storage/LocalDataSource.kt

@@ -1,34 +0,0 @@
-/*
- * Look4Sat. Amateur radio and weather satellite tracker and passes predictor for Android.
- * Copyright (C) 2019, 2020 Arty Bishop (bishop.arty@gmail.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-package com.rtbishop.look4sat.storage
-
-import com.rtbishop.look4sat.repo.Transmitter
-import javax.inject.Inject
-
-class LocalDataSource @Inject constructor(private val transmittersDao: TransmittersDao) {
-
-    suspend fun insertTransmitters(transmitters: List<Transmitter>) {
-        transmittersDao.insertTransmitters(transmitters)
-    }
-
-    suspend fun getTransmittersForSat(id: Int): List<Transmitter> {
-        return transmittersDao.getTransmittersForSat(id)
-    }
-}

app/src/main/java/com/rtbishop/look4sat/ui/MainActivity.kt

@@ -40,12 +40,14 @@ import androidx.navigation.ui.AppBarConfiguration
 import androidx.navigation.ui.navigateUp
 import androidx.navigation.ui.setupActionBarWithNavController
 import androidx.navigation.ui.setupWithNavController
-import com.rtbishop.look4sat.MainViewModel
+import com.rtbishop.look4sat.Look4SatApp
 import com.rtbishop.look4sat.R
+import com.rtbishop.look4sat.dagger.ViewModelFactory
 import com.rtbishop.look4sat.databinding.ActivityMainBinding
 import com.rtbishop.look4sat.databinding.DrawerHeaderBinding
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
+import javax.inject.Inject
 
 class MainActivity : AppCompatActivity() {
 
@@ -54,19 +56,25 @@ class MainActivity : AppCompatActivity() {
     private val permGranted = PackageManager.PERMISSION_GRANTED
     private val githubUrl = "https://github.com/rt-bishop/LookingSat"
 
+    @Inject
+    lateinit var viewModelFactory: ViewModelFactory
+    private lateinit var viewModel: SharedViewModel
     private lateinit var mainBinding: ActivityMainBinding
     private lateinit var drawerBinding: DrawerHeaderBinding
-    private lateinit var viewModel: MainViewModel
     private lateinit var appBarConfig: AppBarConfiguration
 
     override fun onCreate(savedInstanceState: Bundle?) {
         setTheme(R.style.AppTheme)
         super.onCreate(savedInstanceState)
+
         mainBinding = ActivityMainBinding.inflate(layoutInflater)
         drawerBinding = DrawerHeaderBinding.inflate(layoutInflater, mainBinding.navView, true)
         setContentView(mainBinding.root)
         window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
-        viewModel = ViewModelProvider(this).get(MainViewModel::class.java)
+
+        (application as Look4SatApp).appComponent.inject(this)
+        viewModel = ViewModelProvider(this, viewModelFactory).get(SharedViewModel::class.java)
+
         setupComponents()
         setupObservers()
         setupDrawer()
@@ -108,10 +116,6 @@ class MainActivity : AppCompatActivity() {
     }
 
     private fun setupObservers() {
-        viewModel.getDebugMessage().observe(this, Observer { message ->
-            Toast.makeText(this, message, Toast.LENGTH_SHORT).show()
-        })
-
         viewModel.getGSP().observe(this, Observer { gsp ->
             drawerBinding.drawerLatValue.text =
                 String.format(getString(R.string.pat_location), gsp.latitude)
@@ -126,11 +130,11 @@ class MainActivity : AppCompatActivity() {
             it.lockButton()
         }
         drawerBinding.drawerBtnTle.setOnClickListener {
-            viewModel.updateAndSaveTleFile()
+            viewModel.updateEntries()
             it.lockButton()
         }
         drawerBinding.drawerBtnTrans.setOnClickListener {
-            viewModel.updateTransmittersDatabase()
+            viewModel.updateTransmitters()
             it.lockButton()
         }
         drawerBinding.drawerBtnGithub.setOnClickListener {
@@ -157,7 +161,7 @@ class MainActivity : AppCompatActivity() {
                 ActivityCompat.requestPermissions(this, arrayOf(permLocation), permLocationCode)
             }
         } else {
-            viewModel.updateLocation()
+            viewModel.updatePosition()
         }
     }
 
@@ -165,7 +169,7 @@ class MainActivity : AppCompatActivity() {
         when (reqCode) {
             permLocationCode -> {
                 if (res.isNotEmpty() && res[0] == permGranted) {
-                    viewModel.updateLocation()
+                    viewModel.updatePosition()
                 }
             }
         }

app/src/main/java/com/rtbishop/look4sat/ui/SharedViewModel.kt

@@ -0,0 +1,143 @@
+/*
+ * Look4Sat. Amateur radio and weather satellite tracker and passes predictor for Android.
+ * Copyright (C) 2019, 2020 Arty Bishop (bishop.arty@gmail.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+package com.rtbishop.look4sat.ui
+
+import androidx.lifecycle.*
+import com.github.amsacode.predict4java.GroundStationPosition
+import com.rtbishop.look4sat.data.SatEntry
+import com.rtbishop.look4sat.data.SatPass
+import com.rtbishop.look4sat.repo.Repository
+import com.rtbishop.look4sat.utility.PassPredictor
+import com.rtbishop.look4sat.utility.PrefsManager
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
+import java.util.*
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class SharedViewModel @Inject constructor(
+    private val prefsManager: PrefsManager,
+    private val repository: Repository
+) : ViewModel() {
+
+    var isFirstLaunch = true
+    private var calculationJob: Job? = null
+    private val urlList = listOf("https://celestrak.com/NORAD/elements/active.txt")
+
+    private val _satPassList = MutableLiveData<MutableList<SatPass>>()
+    fun getSatPassList(): LiveData<MutableList<SatPass>> = _satPassList
+
+    private val _gsp = MutableLiveData(prefsManager.getPosition())
+    fun getGSP(): LiveData<GroundStationPosition> = _gsp
+
+    private val _isListRefreshing = MutableLiveData<Boolean>()
+    fun getRefreshing(): LiveData<Boolean> = _isListRefreshing
+
+    fun getRefreshRate() = prefsManager.getRefreshRate()
+    fun getHoursAhead() = prefsManager.getHoursAhead()
+    fun getMinElevation() = prefsManager.getMinElevation()
+    fun setPositionFromPref() = _gsp.postValue(prefsManager.getPosition())
+
+    fun getTransmittersForSat(id: Int) = liveData { emit(repository.getTransmittersByCatNum(id)) }
+
+    fun updateEntries() {
+        viewModelScope.launch {
+            val selected = repository.getSelectedEntries()
+            repository.updateEntriesFrom(urlList)
+            repository.updateEntriesSelection(selected)
+        }
+    }
+
+    fun updateEntriesSelection(entries: List<SatEntry>) {
+        viewModelScope.launch {
+            repository.updateEntriesSelection(entries)
+            calculatePasses()
+        }
+    }
+
+    fun updatePosition() {
+        prefsManager.getLastKnownPosition().let {
+            prefsManager.setPosition(it)
+            _gsp.postValue(it)
+        }
+    }
+
+    fun updateTransmitters() {
+        viewModelScope.launch(Dispatchers.IO) {
+            repository.updateTransmitters()
+        }
+    }
+
+    suspend fun getAllEntries(): List<SatEntry> {
+        return repository.getAllEntries()
+    }
+
+    fun calculatePasses() {
+        _isListRefreshing.postValue(true)
+        calculationJob?.cancel()
+        var passList = mutableListOf<SatPass>()
+        val dateNow = Date()
+        val gsp = getGSP().value ?: GroundStationPosition(0.0, 0.0, 0.0)
+        calculationJob = viewModelScope.launch(Dispatchers.Default) {
+            repository.getSelectedEntries().forEach {
+                passList.addAll(getPassesForEntries(it, dateNow, gsp))
+            }
+            passList = filterAndSortPasses(passList, dateNow, getHoursAhead())
+            _satPassList.postValue(passList)
+            _isListRefreshing.postValue(false)
+        }
+    }
+
+    fun setPassPrefs(hoursAhead: Int, minEl: Double) {
+        prefsManager.setHoursAhead(hoursAhead)
+        prefsManager.setMinElevation(minEl)
+    }
+
+    private fun getPassesForEntries(
+        entry: SatEntry,
+        dateNow: Date,
+        gsp: GroundStationPosition
+    ): MutableList<SatPass> {
+        val passList = mutableListOf<SatPass>()
+        val predictor = PassPredictor(entry.tle, gsp)
+        val passes = predictor.getPasses(dateNow, getHoursAhead(), true)
+        passes.forEach { passList.add(SatPass(entry.tle, predictor, it)) }
+        return passList
+    }
+
+    private fun filterAndSortPasses(
+        passes: MutableList<SatPass>,
+        dateNow: Date,
+        hoursAhead: Int
+    ): MutableList<SatPass> {
+        val dateFuture = Calendar.getInstance().let {
+            it.time = dateNow
+            it.add(Calendar.HOUR, hoursAhead)
+            it.time
+        }
+        passes.removeAll { it.pass.startTime.after(dateFuture) }
+        passes.removeAll { it.pass.endTime.before(dateNow) }
+        passes.removeAll { it.pass.maxEl < getMinElevation() }
+        passes.sortBy { it.pass.startTime }
+        return passes
+    }
+}

app/src/main/java/com/rtbishop/look4sat/ui/adapters/SatEntryAdapter.kt

@@ -23,10 +23,10 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
+import com.rtbishop.look4sat.data.SatEntry
 import com.rtbishop.look4sat.databinding.ItemSatEntryBinding
-import com.rtbishop.look4sat.repo.SatEntry
 
-internal class SatEntryAdapter(private var entriesList: MutableList<SatEntry>) :
+class SatEntryAdapter(private var entries: MutableList<SatEntry>) :
     RecyclerView.Adapter<SatEntryAdapter.SatEntryHolder>() {
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): SatEntryHolder {
@@ -36,25 +36,27 @@ internal class SatEntryAdapter(private var entriesList: MutableList<SatEntry>) :
     }
 
     override fun onBindViewHolder(holder: SatEntryHolder, position: Int) {
-        holder.bind(entriesList[position])
+        holder.bind(entries[position])
     }
 
     override fun getItemCount(): Int {
-        return entriesList.size
+        return entries.size
     }
 
-    fun setEntries(entries: MutableList<SatEntry>) {
-        entriesList = entries
+    fun setEntries(list: MutableList<SatEntry>) {
+        entries = list
         notifyDataSetChanged()
     }
 
-    internal inner class SatEntryHolder(itemView: View, private val binding: ItemSatEntryBinding) :
+    inner class SatEntryHolder(itemView: View, private val binding: ItemSatEntryBinding) :
         RecyclerView.ViewHolder(itemView) {
 
         fun bind(satEntry: SatEntry) {
             binding.satEntryCheckbox.text = satEntry.name
             binding.satEntryCheckbox.isChecked = satEntry.isSelected
-            itemView.setOnClickListener { satEntry.isSelected = binding.satEntryCheckbox.isChecked }
+            itemView.setOnClickListener {
+                satEntry.isSelected = binding.satEntryCheckbox.isChecked
+            }
         }
     }
 }

app/src/main/java/com/rtbishop/look4sat/ui/adapters/SatPassAdapter.kt

@@ -25,16 +25,16 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.navigation.findNavController
 import androidx.recyclerview.widget.RecyclerView
-import com.rtbishop.look4sat.MainViewModel
 import com.rtbishop.look4sat.R
+import com.rtbishop.look4sat.data.SatPass
 import com.rtbishop.look4sat.databinding.ItemPassGeoBinding
 import com.rtbishop.look4sat.databinding.ItemPassLeoBinding
-import com.rtbishop.look4sat.repo.SatPass
-import com.rtbishop.look4sat.ui.PassListFragmentDirections
+import com.rtbishop.look4sat.ui.SharedViewModel
+import com.rtbishop.look4sat.ui.fragments.PassListFragmentDirections
 import java.text.SimpleDateFormat
 import java.util.*
 
-class SatPassAdapter(val viewModel: MainViewModel) :
+class SatPassAdapter(val viewModel: SharedViewModel) :
     RecyclerView.Adapter<RecyclerView.ViewHolder>() {
 
     private var satPassList = mutableListOf<SatPass>()

app/src/main/java/com/rtbishop/look4sat/ui/adapters/TransmitterAdapter.kt

@@ -25,8 +25,8 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import com.rtbishop.look4sat.R
+import com.rtbishop.look4sat.data.Transmitter
 import com.rtbishop.look4sat.databinding.ItemTransmitterBinding
-import com.rtbishop.look4sat.repo.Transmitter
 
 class TransmitterAdapter : RecyclerView.Adapter<TransmitterAdapter.TransmitterHolder>() {
 

app/src/main/java/com/rtbishop/look4sat/ui/fragments/AboutFragment.kt

@@ -17,7 +17,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.ui
+package com.rtbishop.look4sat.ui.fragments
 
 import android.os.Bundle
 import android.text.method.LinkMovementMethod

app/src/main/java/com/rtbishop/look4sat/ui/fragments/MapViewFragment.kt

@@ -17,7 +17,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.ui
+package com.rtbishop.look4sat.ui.fragments
 
 import android.content.Context
 import android.graphics.*
@@ -33,20 +33,26 @@ import com.github.amsacode.predict4java.GroundStationPosition
 import com.github.amsacode.predict4java.Position
 import com.github.amsacode.predict4java.SatPos
 import com.github.amsacode.predict4java.TLE
-import com.rtbishop.look4sat.MainViewModel
+import com.rtbishop.look4sat.Look4SatApp
 import com.rtbishop.look4sat.R
+import com.rtbishop.look4sat.dagger.ViewModelFactory
+import com.rtbishop.look4sat.data.SatPass
 import com.rtbishop.look4sat.databinding.FragmentMapViewBinding
-import com.rtbishop.look4sat.predict4kotlin.PassPredictor
-import com.rtbishop.look4sat.repo.SatPass
+import com.rtbishop.look4sat.ui.MainActivity
+import com.rtbishop.look4sat.ui.SharedViewModel
+import com.rtbishop.look4sat.utility.PassPredictor
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 import java.util.*
+import javax.inject.Inject
 import kotlin.math.abs
 
 class MapViewFragment : Fragment(R.layout.fragment_map_view) {
 
+    @Inject
+    lateinit var modelFactory: ViewModelFactory
     private lateinit var mainActivity: MainActivity
-    private lateinit var viewModel: MainViewModel
+    private lateinit var viewModel: SharedViewModel
     private lateinit var mapView: MapView
     private lateinit var predictor: PassPredictor
     private lateinit var selectedSat: TLE
@@ -58,7 +64,8 @@ class MapViewFragment : Fragment(R.layout.fragment_map_view) {
         super.onViewCreated(view, savedInstanceState)
         val binding = FragmentMapViewBinding.bind(view)
         mainActivity = activity as MainActivity
-        viewModel = ViewModelProvider(mainActivity).get(MainViewModel::class.java)
+        (mainActivity.application as Look4SatApp).appComponent.inject(this)
+        viewModel = ViewModelProvider(mainActivity, modelFactory).get(SharedViewModel::class.java)
         gsp = viewModel.getGSP().value ?: GroundStationPosition(0.0, 0.0, 0.0)
         satPassList = viewModel.getSatPassList().value ?: emptyList()
 

app/src/main/java/com/rtbishop/look4sat/ui/fragments/PassListFragment.kt

@@ -17,7 +17,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.ui
+package com.rtbishop.look4sat.ui.fragments
 
 import android.os.Bundle
 import android.os.CountDownTimer
@@ -30,68 +30,55 @@ import androidx.appcompat.app.AlertDialog
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.Observer
 import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.SimpleItemAnimator
-import com.github.amsacode.predict4java.TLE
-import com.rtbishop.look4sat.MainViewModel
+import com.rtbishop.look4sat.Look4SatApp
 import com.rtbishop.look4sat.R
+import com.rtbishop.look4sat.dagger.ViewModelFactory
+import com.rtbishop.look4sat.data.SatEntry
+import com.rtbishop.look4sat.data.SatPass
 import com.rtbishop.look4sat.databinding.FragmentPassListBinding
-import com.rtbishop.look4sat.repo.SatEntry
-import com.rtbishop.look4sat.repo.SatPass
+import com.rtbishop.look4sat.ui.MainActivity
+import com.rtbishop.look4sat.ui.SharedViewModel
 import com.rtbishop.look4sat.ui.adapters.SatPassAdapter
+import kotlinx.coroutines.launch
 import java.util.*
 import java.util.concurrent.TimeUnit
+import javax.inject.Inject
 
 class PassListFragment : Fragment(R.layout.fragment_pass_list) {
 
-    private lateinit var viewModel: MainViewModel
+    @Inject
+    lateinit var modelFactory: ViewModelFactory
+    private lateinit var viewModel: SharedViewModel
     private lateinit var satPassAdapter: SatPassAdapter
     private lateinit var btnPassPrefs: ImageButton
     private lateinit var aosTimer: CountDownTimer
     private lateinit var aosTimerText: TextView
     private lateinit var mainActivity: MainActivity
-    private var satPassList: MutableList<SatPass> = mutableListOf()
     private var isTimerSet: Boolean = false
+    private var satPassList: MutableList<SatPass> = mutableListOf()
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        val fragmentBinding = FragmentPassListBinding.bind(view)
+        val binding = FragmentPassListBinding.bind(view)
         mainActivity = activity as MainActivity
-        viewModel = ViewModelProvider(mainActivity).get(MainViewModel::class.java)
+        (mainActivity.application as Look4SatApp).appComponent.inject(this)
+        viewModel = ViewModelProvider(mainActivity, modelFactory).get(SharedViewModel::class.java)
         satPassAdapter = SatPassAdapter(viewModel)
         aosTimerText = mainActivity.findViewById(R.id.toolbar_timer)
         btnPassPrefs = mainActivity.findViewById(R.id.toolbar_filter)
 
-        setupComponents(fragmentBinding)
-        setupObservers(fragmentBinding)
+        setupObservers(binding)
+        setupComponents(binding)
 
-        if (viewModel.tleSelection.isNotEmpty() && viewModel.isFirstLaunch) {
-            viewModel.getPasses()
+        if (viewModel.isFirstLaunch) {
+            viewModel.calculatePasses()
             viewModel.isFirstLaunch = false
         }
     }
 
-    private fun setupComponents(binding: FragmentPassListBinding) {
-        binding.recPassList.apply {
-            layoutManager = LinearLayoutManager(mainActivity)
-            adapter = satPassAdapter
-            isVerticalScrollBarEnabled = false
-            (itemAnimator as SimpleItemAnimator).supportsChangeAnimations = false
-        }
-        satPassAdapter.setList(satPassList)
-        setTimer()
-
-        binding.refLayoutPassList.setProgressBackgroundColorSchemeResource(R.color.themeAccent)
-        binding.refLayoutPassList.setColorSchemeResources(R.color.backgroundDark)
-        binding.refLayoutPassList.setOnRefreshListener { viewModel.getPasses() }
-        btnPassPrefs.setOnClickListener {
-            showSatPassPrefsDialog(viewModel.getHoursAhead(), viewModel.getMinElevation())
-        }
-        binding.fabSatSelect.setOnClickListener {
-            showSelectSatDialog(viewModel.tleMainList, viewModel.tleSelection)
-        }
-    }
-
     private fun setupObservers(binding: FragmentPassListBinding) {
         viewModel.getSatPassList().observe(viewLifecycleOwner, Observer {
             satPassList = it
@@ -110,6 +97,30 @@ class PassListFragment : Fragment(R.layout.fragment_pass_list) {
         })
     }
 
+    private fun setupComponents(binding: FragmentPassListBinding) {
+        binding.recPassList.apply {
+            layoutManager = LinearLayoutManager(mainActivity)
+            adapter = satPassAdapter
+            isVerticalScrollBarEnabled = false
+            (itemAnimator as SimpleItemAnimator).supportsChangeAnimations = false
+        }
+        satPassAdapter.setList(satPassList)
+        setTimer()
+
+        binding.refLayoutPassList.setProgressBackgroundColorSchemeResource(R.color.themeAccent)
+        binding.refLayoutPassList.setColorSchemeResources(R.color.backgroundDark)
+        binding.refLayoutPassList.setOnRefreshListener { viewModel.calculatePasses() }
+        btnPassPrefs.setOnClickListener {
+            showSatPassPrefsDialog(viewModel.getHoursAhead(), viewModel.getMinElevation())
+        }
+        binding.fabSatSelect.setOnClickListener {
+            lifecycleScope.launch {
+                val list = viewModel.getAllEntries() as MutableList
+                showSelectSatDialog(list)
+            }
+        }
+    }
+
     private fun showSatPassPrefsDialog(hoursAhead: Int, minEl: Double) {
         val satPassPrefView = View.inflate(mainActivity, R.layout.dialog_pass_pref, null)
         val etHoursAhead = satPassPrefView.findViewById<EditText>(R.id.pref_et_hoursAhead)
@@ -142,7 +153,7 @@ class PassListFragment : Fragment(R.layout.fragment_pass_list) {
                         }
                         else -> {
                             viewModel.setPassPrefs(hours, elevation)
-                            viewModel.getPasses()
+                            viewModel.calculatePasses()
                         }
                     }
                 } else Toast.makeText(
@@ -160,31 +171,17 @@ class PassListFragment : Fragment(R.layout.fragment_pass_list) {
             .show()
     }
 
-    private fun showSelectSatDialog(tleMainList: List<TLE>, selection: MutableList<Int>) {
-        if (tleMainList.isEmpty()) {
-            Toast.makeText(mainActivity, getString(R.string.err_update_tle), Toast.LENGTH_SHORT)
-                .show()
-        } else {
-            val entriesList = mutableListOf<SatEntry>().apply {
-                tleMainList.withIndex().forEach {
-                    this.add(SatEntry(it.index, it.value.name))
-                }
+    private fun showSelectSatDialog(tleMainList: MutableList<SatEntry>) {
+        val listener = object : SatEntryDialogFragment.EntriesSubmitListener {
+            override fun onEntriesSubmit(entries: MutableList<SatEntry>) {
+                viewModel.updateEntriesSelection(entries)
             }
-
-            val listener = object : SatEntryDialog.EntriesSubmitListener {
-                override fun onEntriesSubmit(list: MutableList<Int>) {
-                    viewModel.updateAndSaveSelectionList(list)
-                    viewModel.getPasses()
-                }
-            }
-
-            val dialogFragment = SatEntryDialog().apply {
-                setEntriesList(entriesList)
-                setSelectionList(selection)
-                setEntriesListener(listener)
-            }
-            dialogFragment.show(mainActivity.supportFragmentManager, "SatEntryDialog")
         }
+
+        val dialogFragment = SatEntryDialogFragment(tleMainList).apply {
+            setEntriesListener(listener)
+        }
+        dialogFragment.show(mainActivity.supportFragmentManager, "SatEntryDialogFragment")
     }
 
     private fun setTimer() {
@@ -229,7 +226,7 @@ class PassListFragment : Fragment(R.layout.fragment_pass_list) {
         val millisBeforeEnd = lastPass.pass.endTime.time.minus(timeNow.time)
         aosTimer = object : CountDownTimer(millisBeforeEnd, 1000) {
             override fun onFinish() {
-                viewModel.getPasses()
+                viewModel.calculatePasses()
             }
 
             override fun onTick(millisUntilFinished: Long) {

app/src/main/java/com/rtbishop/look4sat/ui/fragments/PolarViewFragment.kt

@@ -17,7 +17,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.ui
+package com.rtbishop.look4sat.ui.fragments
 
 import android.content.Context
 import android.graphics.Canvas
@@ -32,43 +32,65 @@ import androidx.lifecycle.lifecycleScope
 import androidx.navigation.fragment.navArgs
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.amsacode.predict4java.SatPos
-import com.rtbishop.look4sat.MainViewModel
+import com.rtbishop.look4sat.Look4SatApp
 import com.rtbishop.look4sat.R
+import com.rtbishop.look4sat.dagger.ViewModelFactory
+import com.rtbishop.look4sat.data.SatPass
 import com.rtbishop.look4sat.databinding.FragmentPolarViewBinding
-import com.rtbishop.look4sat.repo.SatPass
+import com.rtbishop.look4sat.ui.MainActivity
+import com.rtbishop.look4sat.ui.SharedViewModel
 import com.rtbishop.look4sat.ui.adapters.TransmitterAdapter
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 import java.util.*
+import javax.inject.Inject
 import kotlin.math.cos
 import kotlin.math.sin
 
 class PolarViewFragment : Fragment(R.layout.fragment_polar_view) {
 
+    @Inject
+    lateinit var modelFactory: ViewModelFactory
     private val args: PolarViewFragmentArgs by navArgs()
-
-    private lateinit var viewModel: MainViewModel
+    private lateinit var viewModel: SharedViewModel
     private lateinit var satPass: SatPass
     private lateinit var polarView: PolarView
-    private lateinit var transmitterAdapter: TransmitterAdapter
     private lateinit var mainActivity: MainActivity
+    private var transmitterAdapter: TransmitterAdapter = TransmitterAdapter()
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
         val binding = FragmentPolarViewBinding.bind(view)
         mainActivity = activity as MainActivity
-        viewModel = ViewModelProvider(mainActivity).get(MainViewModel::class.java)
-        viewModel.getSatPassList().value?.let {
-            val refreshRate = viewModel.getRefreshRate()
-            satPass = it[args.satPassIndex]
-            mainActivity.supportActionBar?.title = satPass.tle.name
+        (mainActivity.application as Look4SatApp).appComponent.inject(this)
+        viewModel = ViewModelProvider(mainActivity, modelFactory).get(SharedViewModel::class.java)
+        val refreshRate = viewModel.getRefreshRate()
 
-            polarView = PolarView(mainActivity, refreshRate, binding)
-            binding.framePolar.addView(polarView)
-
-            setupTransRecycler(binding)
-            refreshView()
+        binding.recPolar.apply {
+            layoutManager = LinearLayoutManager(mainActivity)
+            adapter = transmitterAdapter
         }
+
+        viewModel.getSatPassList()
+            .observe(viewLifecycleOwner, androidx.lifecycle.Observer { mutableList ->
+                satPass = mutableList[args.satPassIndex]
+                mainActivity.supportActionBar?.title = satPass.tle.name
+                polarView = PolarView(mainActivity, refreshRate, binding)
+                binding.framePolar.addView(polarView)
+                refreshView()
+                viewModel.getTransmittersForSat(satPass.tle.catnum)
+                    .observe(viewLifecycleOwner, androidx.lifecycle.Observer {
+                        if (it.isNotEmpty()) {
+                            transmitterAdapter.setList(it)
+                            transmitterAdapter.notifyDataSetChanged()
+                            binding.recPolar.visibility = View.VISIBLE
+                            binding.tvPolarNoTrans.visibility = View.INVISIBLE
+                        } else {
+                            binding.recPolar.visibility = View.INVISIBLE
+                            binding.tvPolarNoTrans.visibility = View.VISIBLE
+                        }
+                    })
+            })
     }
 
     private fun refreshView() {
@@ -80,24 +102,6 @@ class PolarViewFragment : Fragment(R.layout.fragment_polar_view) {
         }
     }
 
-    private fun setupTransRecycler(binding: FragmentPolarViewBinding) {
-        transmitterAdapter = TransmitterAdapter()
-        binding.recPolar.apply {
-            layoutManager = LinearLayoutManager(mainActivity)
-            adapter = transmitterAdapter
-        }
-        lifecycleScope.launch {
-            val transList = viewModel.getTransmittersForSat(satPass.tle.catnum)
-            if (transList.isNotEmpty()) {
-                transmitterAdapter.setList(transList)
-                transmitterAdapter.notifyDataSetChanged()
-            } else {
-                binding.recPolar.visibility = View.INVISIBLE
-                binding.tvPolarNoTrans.visibility = View.VISIBLE
-            }
-        }
-    }
-
     inner class PolarView(
         context: Context,
         private val updateFreq: Long,

app/src/main/java/com/rtbishop/look4sat/ui/fragments/PreferencesFragment.kt

@@ -17,7 +17,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.ui
+package com.rtbishop.look4sat.ui.fragments
 
 import android.content.SharedPreferences
 import android.os.Bundle
@@ -26,14 +26,15 @@ import android.widget.Toast
 import androidx.lifecycle.ViewModelProvider
 import androidx.preference.EditTextPreference
 import androidx.preference.PreferenceFragmentCompat
-import com.rtbishop.look4sat.MainViewModel
 import com.rtbishop.look4sat.R
+import com.rtbishop.look4sat.ui.MainActivity
+import com.rtbishop.look4sat.ui.SharedViewModel
 
-class SettingsFragment : PreferenceFragmentCompat(),
+class PreferencesFragment : PreferenceFragmentCompat(),
     SharedPreferences.OnSharedPreferenceChangeListener {
 
     private lateinit var mainActivity: MainActivity
-    private lateinit var viewModel: MainViewModel
+    private lateinit var viewModel: SharedViewModel
     private lateinit var keyLat: String
     private lateinit var keyLon: String
     private lateinit var keyAlt: String
@@ -44,7 +45,7 @@ class SettingsFragment : PreferenceFragmentCompat(),
         val provider = EditTextPreference.SimpleSummaryProvider.getInstance()
 
         mainActivity = activity as MainActivity
-        viewModel = ViewModelProvider(mainActivity).get(MainViewModel::class.java)
+        viewModel = ViewModelProvider(mainActivity).get(SharedViewModel::class.java)
 
         keyLat = mainActivity.getString(R.string.pref_lat_key)
         keyLon = mainActivity.getString(R.string.pref_lon_key)
@@ -139,7 +140,7 @@ class SettingsFragment : PreferenceFragmentCompat(),
     }
 
     override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
-        if (key == keyLat || key == keyLon || key == keyAlt) viewModel.setGroundStationPosition()
+        if (key == keyLat || key == keyLon || key == keyAlt) viewModel.setPositionFromPref()
     }
 
     override fun onResume() {

app/src/main/java/com/rtbishop/look4sat/ui/fragments/SatEntryDialogFragment.kt

@@ -17,7 +17,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-package com.rtbishop.look4sat.ui
+package com.rtbishop.look4sat.ui.fragments
 
 import android.app.Dialog
 import android.os.Bundle
@@ -26,18 +26,16 @@ import android.view.Window
 import android.widget.SearchView
 import androidx.appcompat.app.AppCompatDialogFragment
 import androidx.recyclerview.widget.LinearLayoutManager
+import com.rtbishop.look4sat.data.SatEntry
 import com.rtbishop.look4sat.databinding.DialogSatEntryBinding
-import com.rtbishop.look4sat.repo.SatEntry
 import com.rtbishop.look4sat.ui.adapters.SatEntryAdapter
 import java.util.*
 
-class SatEntryDialog : AppCompatDialogFragment(), SearchView.OnQueryTextListener {
+class SatEntryDialogFragment(private var entries: MutableList<SatEntry>) :
+    AppCompatDialogFragment(), SearchView.OnQueryTextListener {
 
-    private lateinit var satEntryAdapter: SatEntryAdapter
     private lateinit var entriesListener: EntriesSubmitListener
-
-    private var entriesList = mutableListOf<SatEntry>()
-    private var selectionList = mutableListOf<Int>()
+    private val entryAdapter = SatEntryAdapter(entries)
     private var selectAllToggle = true
 
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
@@ -51,18 +49,15 @@ class SatEntryDialog : AppCompatDialogFragment(), SearchView.OnQueryTextListener
             )
         }
 
-        entriesList = checkSelectedEntries(entriesList, selectionList)
-        satEntryAdapter = SatEntryAdapter(entriesList)
-
         binding.dialogSearch.apply {
-            setOnQueryTextListener(this@SatEntryDialog)
+            setOnQueryTextListener(this@SatEntryDialogFragment)
             onActionViewExpanded()
             clearFocus()
         }
 
         binding.dialogRecycler.apply {
             layoutManager = LinearLayoutManager(activity)
-            adapter = satEntryAdapter
+            adapter = entryAdapter
         }
 
         binding.dialogBtnPositive.setOnClickListener { onPositiveClicked() }
@@ -72,32 +67,27 @@ class SatEntryDialog : AppCompatDialogFragment(), SearchView.OnQueryTextListener
         return satEntryDialog
     }
 
-    fun setEntriesList(list: MutableList<SatEntry>): SatEntryDialog {
-        entriesList = list
-        return this
-    }
-
-    fun setSelectionList(list: MutableList<Int>): SatEntryDialog {
-        selectAllToggle = list.isEmpty()
-        selectionList = list
-        return this
-    }
-
-    fun setEntriesListener(listener: EntriesSubmitListener): SatEntryDialog {
+    fun setEntriesListener(listener: EntriesSubmitListener): SatEntryDialogFragment {
         entriesListener = listener
         return this
     }
 
-    private fun checkSelectedEntries(entries: MutableList<SatEntry>, selection: MutableList<Int>)
-            : MutableList<SatEntry> {
-        selection.forEach { entries[it].isSelected = true }
-        return entries
+    private fun filterEntries(list: MutableList<SatEntry>, query: String): MutableList<SatEntry> {
+        if (query.isEmpty()) return list
+        return try {
+            filterByCatNum(list, query.toInt())
+        } catch (e: NumberFormatException) {
+            filterByName(list, query)
+        }
     }
 
-    private fun filterEntries(list: MutableList<SatEntry>, query: String): MutableList<SatEntry> {
-        val searchQuery = query.toLowerCase(Locale.getDefault())
-        if ((searchQuery == "") or searchQuery.isEmpty()) return list
+    private fun filterByCatNum(list: MutableList<SatEntry>, catNum: Int): MutableList<SatEntry> {
+        val filteredList = list.filter { it.catNum == catNum }
+        return filteredList as MutableList<SatEntry>
+    }
 
+    private fun filterByName(list: MutableList<SatEntry>, query: String): MutableList<SatEntry> {
+        val searchQuery = query.toLowerCase(Locale.getDefault())
         val filteredList = mutableListOf<SatEntry>()
         list.forEach {
             val name = it.name.toLowerCase(Locale.getDefault())
@@ -107,10 +97,7 @@ class SatEntryDialog : AppCompatDialogFragment(), SearchView.OnQueryTextListener
     }
 
     private fun onPositiveClicked() {
-        val listToSubmit = mutableListOf<Int>().apply {
-            entriesList.forEach { if (it.isSelected) this.add(it.id) }
-        }
-        entriesListener.onEntriesSubmit(listToSubmit)
+        entriesListener.onEntriesSubmit(entries)
         dismiss()
     }
 
@@ -120,20 +107,19 @@ class SatEntryDialog : AppCompatDialogFragment(), SearchView.OnQueryTextListener
 
     private fun onNeutralClicked() {
         selectAllToggle = if (selectAllToggle) {
-            entriesList.forEach { it.isSelected = true }
-            satEntryAdapter.setEntries(entriesList)
+            entries.forEach { it.isSelected = true }
+            entryAdapter.setEntries(entries)
             false
         } else {
-            entriesList.forEach { it.isSelected = false }
-            satEntryAdapter.setEntries(entriesList)
+            entries.forEach { it.isSelected = false }
+            entryAdapter.setEntries(entries)
             true
         }
     }
 
     override fun onQueryTextChange(newText: String): Boolean {
-        entriesList = checkSelectedEntries(entriesList, selectionList)
-        val filteredList = filterEntries(entriesList, newText)
-        satEntryAdapter.setEntries(filteredList)
+        val filteredList = filterEntries(entries, newText)
+        entryAdapter.setEntries(filteredList)
         return false
     }
 
@@ -142,6 +128,6 @@ class SatEntryDialog : AppCompatDialogFragment(), SearchView.OnQueryTextListener
     }
 
     interface EntriesSubmitListener {
-        fun onEntriesSubmit(list: MutableList<Int>)
+        fun onEntriesSubmit(entries: MutableList<SatEntry>)
     }
 }

app/src/main/java/com/rtbishop/look4sat/utility/Converters.kt

@@ -0,0 +1,19 @@
+package com.rtbishop.look4sat.utility
+
+import androidx.room.TypeConverter
+import com.github.amsacode.predict4java.TLE
+import com.google.gson.Gson
+
+class Converters {
+    private val gSon = Gson()
+
+    @TypeConverter
+    fun tleToString(tle: TLE): String {
+        return gSon.toJson(tle)
+    }
+
+    @TypeConverter
+    fun tleFromString(string: String): TLE {
+        return gSon.fromJson(string, TLE::class.java)
+    }
+}

app/src/main/java/com/rtbishop/look4sat/utility/DataManager.kt

@@ -1,115 +0,0 @@
-/*
- * Look4Sat. Amateur radio and weather satellite tracker and passes predictor for Android.
- * Copyright (C) 2019, 2020 Arty Bishop (bishop.arty@gmail.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-package com.rtbishop.look4sat.utility
-
-import android.content.Context
-import android.location.LocationManager
-import android.util.Log
-import com.github.amsacode.predict4java.GroundStationPosition
-import com.github.amsacode.predict4java.TLE
-import com.rtbishop.look4sat.R
-import java.io.FileNotFoundException
-import java.io.IOException
-import java.io.ObjectInputStream
-import java.io.ObjectOutputStream
-import javax.inject.Inject
-
-class DataManager @Inject constructor(
-    private val locationManager: LocationManager,
-    private val context: Context
-) {
-
-    private val tag = "DataManager"
-    private val tleMainListFileName = "tleFile.txt"
-    private val tleSelectionFileName = "tleSelection"
-
-    fun getLastKnownLocation(): GroundStationPosition? {
-        val passiveProvider = LocationManager.PASSIVE_PROVIDER
-        var groundStationPosition: GroundStationPosition? = null
-        return try {
-            val location = locationManager.getLastKnownLocation(passiveProvider)
-            location?.let {
-                groundStationPosition =
-                    GroundStationPosition(it.latitude, it.longitude, it.altitude)
-            }
-            groundStationPosition
-        } catch (e: SecurityException) {
-            Log.w(tag, "No permissions")
-            null
-        }
-    }
-
-    fun saveSelectionList(selectionList: MutableList<Int>) {
-        try {
-            val fileOutputStream =
-                context.openFileOutput(tleSelectionFileName, Context.MODE_PRIVATE)
-            ObjectOutputStream(fileOutputStream).apply {
-                writeObject(selectionList)
-                flush()
-                close()
-            }
-        } catch (exception: IOException) {
-            Log.w(tag, "Can't save selection list")
-        }
-    }
-
-    fun saveTleList(tleList: MutableList<TLE>) {
-        try {
-            val fileOutStream = context.openFileOutput(tleMainListFileName, Context.MODE_PRIVATE)
-            ObjectOutputStream(fileOutStream).apply {
-                writeObject(tleList)
-                flush()
-                close()
-            }
-        } catch (exception: IOException) {
-            Log.w(tag, "Can't save TLE list")
-        }
-    }
-
-    @Suppress("UNCHECKED_CAST")
-    fun loadTleList(): List<TLE> {
-        return try {
-            val tleStream = context.openFileInput(tleMainListFileName)
-            val tleList = ObjectInputStream(tleStream).readObject()
-            tleList as List<TLE>
-        } catch (exception: FileNotFoundException) {
-            Log.w(tag, context.getString(R.string.err_no_tle_file))
-            emptyList()
-        } catch (exception: IOException) {
-            Log.w(tag, exception.toString())
-            emptyList()
-        }
-    }
-
-    @Suppress("UNCHECKED_CAST")
-    fun loadSelectionList(): MutableList<Int> {
-        return try {
-            val selectionStream = context.openFileInput(tleSelectionFileName)
-            val selectionList = ObjectInputStream(selectionStream).readObject()
-            selectionList as MutableList<Int>
-        } catch (exception: FileNotFoundException) {
-            Log.w(tag, context.getString(R.string.err_no_selection_file))
-            mutableListOf()
-        } catch (exception: IOException) {
-            Log.w(tag, exception.toString())
-            mutableListOf()
-        }
-    }
-}

app/src/main/java/com/rtbishop/look4sat/utility/PassPredictor.kt

@@ -35,7 +35,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, visit http://www.fsf.org/
  */
-package com.rtbishop.look4sat.predict4kotlin
+package com.rtbishop.look4sat.utility
 
 import com.github.amsacode.predict4java.*
 import java.util.*
@@ -253,14 +253,18 @@ class PassPredictor(private val tle: TLE, private val qth: GroundStationPosition
         var polePassed = deadSpotNone
         val az1 = prevPos.azimuth / twoPi * 360.0
         val az2 = satPos.azimuth / twoPi * 360.0
-        if (az1 > az2) { // we may be moving from 350 or greater through north
+        if (az1 > az2) {
+            // we may be moving from 350 or greater through north
             if (az1 > 350 && az2 < 10) polePassed = north
-            else { // we may be moving from 190 or greater through south
+            else {
+                // we may be moving from 190 or greater through south
                 if (az1 > 180 && az2 < 180) polePassed = south
             }
-        } else { // we may be moving from 10 or less through north
+        } else {
+            // we may be moving from 10 or less through north
             if (az1 < 10 && az2 > 350) polePassed = north
-            else { // we may be moving from 170 or more through south
+            else {
+                // we may be moving from 170 or more through south
                 if (az1 < 180 && az2 > 180) polePassed = south
             }
         }
@@ -270,4 +274,4 @@ class PassPredictor(private val tle: TLE, private val qth: GroundStationPosition
     private fun threeQuarterOrbitMinutes(): Int {
         return (24.0 * 60.0 / tle.meanmo * 0.75).toInt()
     }
-}
+}

app/src/main/java/com/rtbishop/look4sat/utility/PrefsManager.kt

@@ -20,35 +20,44 @@
 package com.rtbishop.look4sat.utility
 
 import android.content.SharedPreferences
+import android.location.LocationManager
+import android.util.Log
 import androidx.core.content.edit
 import com.github.amsacode.predict4java.GroundStationPosition
 import javax.inject.Inject
 
-class PrefsManager @Inject constructor(private val preferences: SharedPreferences) {
-
+class PrefsManager @Inject constructor(
+    private val preferences: SharedPreferences,
+    private val locationManager: LocationManager
+) {
+    private val tag = "prefsManager"
     private val keyHoursAhead = "hoursAhead"
     private val keyMinElevation = "minEl"
     private val keyLatitude = "latitude"
     private val keyLongitude = "longitude"
     private val keyAltitude = "altitude"
     private val keyRefreshRate = "rate"
+    private val defaultHoursAhead = 8
+    private val defaultMinEl = 16.0
+    private val defaultRefreshRate = "3000"
+    private val defaultGSP = "0.0"
 
     fun getHoursAhead(): Int {
-        return preferences.getInt(keyHoursAhead, 8)
+        return preferences.getInt(keyHoursAhead, defaultHoursAhead)
     }
 
     fun getMinElevation(): Double {
-        return preferences.getDouble(keyMinElevation, 16.0)
+        return preferences.getDouble(keyMinElevation, defaultMinEl)
     }
 
     fun getRefreshRate(): Long {
-        return preferences.getString(keyRefreshRate, "3000")!!.toLong()
+        return preferences.getString(keyRefreshRate, defaultRefreshRate)!!.toLong()
     }
 
-    fun getGroundStationPosition(): GroundStationPosition {
-        val lat = preferences.getString(keyLatitude, "0.0")!!.toDouble()
-        val lon = preferences.getString(keyLongitude, "0.0")!!.toDouble()
-        val alt = preferences.getString(keyAltitude, "0.0")!!.toDouble()
+    fun getPosition(): GroundStationPosition {
+        val lat = preferences.getString(keyLatitude, defaultGSP)!!.toDouble()
+        val lon = preferences.getString(keyLongitude, defaultGSP)!!.toDouble()
+        val alt = preferences.getString(keyAltitude, defaultGSP)!!.toDouble()
         return GroundStationPosition(lat, lon, alt)
     }
 
@@ -73,7 +82,7 @@ class PrefsManager @Inject constructor(private val preferences: SharedPreference
         }
     }
 
-    fun setGroundStationPosition(gsp: GroundStationPosition) {
+    fun setPosition(gsp: GroundStationPosition) {
         preferences.edit {
             putString(keyLatitude, gsp.latitude.toString())
             putString(keyLongitude, gsp.longitude.toString())
@@ -82,6 +91,22 @@ class PrefsManager @Inject constructor(private val preferences: SharedPreference
         }
     }
 
+    fun getLastKnownPosition(): GroundStationPosition {
+        val provider = LocationManager.PASSIVE_PROVIDER
+        var gsp = GroundStationPosition(0.0, 0.0, 0.0)
+        return try {
+            val location = locationManager.getLastKnownLocation(provider)
+            location?.let {
+                gsp =
+                    GroundStationPosition(it.latitude, it.longitude, it.altitude)
+            }
+            gsp
+        } catch (e: SecurityException) {
+            Log.w(tag, "No permissions")
+            gsp
+        }
+    }
+
     private fun SharedPreferences.Editor.putDouble(key: String, double: Double) {
         putLong(key, double.toRawBits())
     }

app/src/main/res/layout/fragment_about.xml

@@ -22,7 +22,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".ui.AboutFragment">
+    tools:context=".ui.fragments.AboutFragment">
 
     <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"

app/src/main/res/layout/fragment_map_view.xml

@@ -22,7 +22,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".ui.MapViewFragment">
+    tools:context=".ui.fragments.MapViewFragment">
 
     <FrameLayout
         android:id="@+id/frameMap"

app/src/main/res/layout/fragment_polar_view.xml

@@ -22,7 +22,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".ui.PolarViewFragment">
+    tools:context=".ui.fragments.PolarViewFragment">
 
     <FrameLayout
         android:id="@+id/frame_polar"

app/src/main/res/navigation/nav_graph.xml

@@ -26,7 +26,7 @@
 
     <fragment
         android:id="@+id/nav_pass_list"
-        android:name="com.rtbishop.look4sat.ui.PassListFragment"
+        android:name="com.rtbishop.look4sat.ui.fragments.PassListFragment"
         android:label="@string/menu_pass_list"
         tools:layout="@layout/fragment_pass_list">
         <action
@@ -40,7 +40,7 @@
 
     <fragment
         android:id="@+id/nav_polar_view"
-        android:name="com.rtbishop.look4sat.ui.PolarViewFragment"
+        android:name="com.rtbishop.look4sat.ui.fragments.PolarViewFragment"
         android:label="@string/menu_polar_view"
         tools:layout="@layout/fragment_polar_view">
         <argument
@@ -50,18 +50,18 @@
 
     <fragment
         android:id="@+id/nav_map_view"
-        android:name="com.rtbishop.look4sat.ui.MapViewFragment"
+        android:name="com.rtbishop.look4sat.ui.fragments.MapViewFragment"
         android:label="@string/menu_map_view"
         tools:layout="@layout/fragment_map_view" />
 
     <fragment
         android:id="@+id/nav_settings"
-        android:name="com.rtbishop.look4sat.ui.SettingsFragment"
+        android:name="com.rtbishop.look4sat.ui.fragments.PreferencesFragment"
         android:label="@string/menu_settings" />
 
     <fragment
         android:id="@+id/nav_about"
-        android:name="com.rtbishop.look4sat.ui.AboutFragment"
+        android:name="com.rtbishop.look4sat.ui.fragments.AboutFragment"
         android:label="@string/menu_about"
         tools:layout="@layout/fragment_about" />
 

build.gradle

@@ -26,9 +26,9 @@ buildscript {
 
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.2'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.71"
-        classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.2.1"
+        classpath 'com.android.tools.build:gradle:3.6.3'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.72"
+        classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.2.2"
     }
 }
 
@@ -44,15 +44,15 @@ task clean(type: Delete) {
 }
 
 ext {
-    material = '1.2.0-alpha05'
+    material = '1.1.0'
     appCompat = '1.1.0'
     supportLib = '1.0.0'
     constraintLayout = '1.1.3'
 
     ktx = '1.2.0'
-    preference = '1.1.0'
+    preference = '1.1.1'
 
-    navigation = '2.2.1'
+    navigation = '2.2.2'
     lifecycle = '2.2.0'
 
     room = '2.2.5'