Added Injector (Service Locator) object. Created minimal RemoteDataSource implementation.

app/src/main/java/com/rtbishop/lookingsat/Injector.kt

@@ -0,0 +1,21 @@
+package com.rtbishop.lookingsat
+
+import com.rtbishop.lookingsat.api.RemoteDataSource
+import com.rtbishop.lookingsat.api.TransmittersApi
+import okhttp3.OkHttpClient
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+
+object Injector {
+    private fun provideRemoteDataSource(): RemoteDataSource {
+        val api = Retrofit.Builder()
+            .baseUrl("https://db.satnogs.org/api/")
+            .addConverterFactory(GsonConverterFactory.create())
+            .build()
+            .create(TransmittersApi::class.java)
+
+        val client = OkHttpClient()
+
+        return RemoteDataSource(api, client)
+    }
+}

app/src/main/java/com/rtbishop/lookingsat/api/RemoteDataSource.kt

@@ -0,0 +1,25 @@
+package com.rtbishop.lookingsat.api
+
+import com.rtbishop.lookingsat.repo.Transmitter
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import java.io.InputStream
+import java.io.SequenceInputStream
+
+private const val TLE_AMATEUR = "https://celestrak.com/NORAD/elements/amateur.txt"
+private const val TLE_WEATHER = "https://celestrak.com/NORAD/elements/weather.txt"
+
+class RemoteDataSource(private val api: TransmittersApi, private val client: OkHttpClient) {
+    private val requestAmateur = Request.Builder().url(TLE_AMATEUR).build()
+    private val requestWeather = Request.Builder().url(TLE_WEATHER).build()
+
+    suspend fun fetchTleFiles(): InputStream {
+        val streamAmateur = client.newCall(requestAmateur).execute().body()?.byteStream()
+        val streamWeather = client.newCall(requestWeather).execute().body()?.byteStream()
+        return SequenceInputStream(streamAmateur, streamWeather)
+    }
+
+    suspend fun fetchTransmitters(): List<Transmitter> {
+        return api.fetchTransmittersList()
+    }
+}

app/src/main/java/com/rtbishop/lookingsat/api/TransmitterApi.kt

@@ -1,22 +0,0 @@
-package com.rtbishop.lookingsat.api
-
-import com.rtbishop.lookingsat.repo.Transmitter
-import retrofit2.Retrofit
-import retrofit2.converter.gson.GsonConverterFactory
-import retrofit2.http.GET
-
-interface TransmitterApi {
-
-    @GET("transmitters/?alive=true")
-    suspend fun getTransmitterList(): List<Transmitter>
-
-    companion object {
-        operator fun invoke(): TransmitterApi {
-            return Retrofit.Builder()
-                .baseUrl("https://db.satnogs.org/api/")
-                .addConverterFactory(GsonConverterFactory.create())
-                .build()
-                .create(TransmitterApi::class.java)
-        }
-    }
-}

app/src/main/java/com/rtbishop/lookingsat/api/TransmitterService.kt

@@ -1,14 +0,0 @@
-package com.rtbishop.lookingsat.api
-
-import androidx.lifecycle.LiveData
-import androidx.lifecycle.MutableLiveData
-import com.rtbishop.lookingsat.repo.Transmitter
-
-class TransmitterService(private val transmitterApi: TransmitterApi) {
-    private val _transmittersList = MutableLiveData<List<Transmitter>>()
-    val transmittersList: LiveData<List<Transmitter>> = _transmittersList
-
-    suspend fun fetchTransmitters() {
-        _transmittersList.postValue(transmitterApi.getTransmitterList())
-    }
-}

app/src/main/java/com/rtbishop/lookingsat/api/TransmittersApi.kt

@@ -0,0 +1,10 @@
+package com.rtbishop.lookingsat.api
+
+import com.rtbishop.lookingsat.repo.Transmitter
+import retrofit2.http.GET
+
+interface TransmittersApi {
+
+    @GET("transmitters/")
+    suspend fun fetchTransmittersList(): List<Transmitter>
+}

app/src/main/java/com/rtbishop/lookingsat/repo/Transmitter.kt

@@ -8,6 +8,7 @@ import com.google.gson.annotations.SerializedName
 data class Transmitter(
     @PrimaryKey @SerializedName("uuid") val uuid: String,
     @SerializedName("description") val description: String,
+    @SerializedName("alive") val isAlive: Boolean,
     @SerializedName("uplink_low") val uplinkLow: Long?,
     @SerializedName("uplink_high") val uplinkHigh: Long?,
     @SerializedName("downlink_low") val downlinkLow: Long?,