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Added GeoConverter.kt and various minor fixes
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@@ -1,157 +0,0 @@
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/*
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* Look4Sat. Amateur radio satellite tracker and pass predictor.
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* Copyright (C) 2019-2022 Arty Bishop (bishop.arty@gmail.com)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package com.rtbishop.look4sat.data.repository
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import com.rtbishop.look4sat.domain.model.SatRadio
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import com.rtbishop.look4sat.domain.predict.OrbitalData
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import kotlinx.coroutines.CoroutineDispatcher
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import kotlinx.coroutines.withContext
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import org.json.JSONArray
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import org.json.JSONObject
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import java.io.InputStream
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import kotlin.math.pow
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class DataParser(private val dispatcher: CoroutineDispatcher) {
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suspend fun parseCSVStream(stream: InputStream): List<OrbitalData> = withContext(dispatcher) {
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val parsedItems = mutableListOf<OrbitalData>()
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stream.bufferedReader().useLines { lines ->
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lines.forEachIndexed { index, line ->
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if (index != 0) {
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val values = line.split(",")
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parseCSV(values)?.let { tle -> parsedItems.add(tle) }
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}
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}
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}
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return@withContext parsedItems
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}
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suspend fun parseTLEStream(stream: InputStream): List<OrbitalData> = withContext(dispatcher) {
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val tleStrings = mutableListOf(String(), String(), String())
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val parsedItems = mutableListOf<OrbitalData>()
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var lineIndex = 0
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stream.bufferedReader().forEachLine { line ->
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tleStrings[lineIndex] = line
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if (lineIndex < 2) {
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lineIndex++
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} else {
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val isLineOneValid = tleStrings[1].substring(0, 1) == "1"
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val isLineTwoValid = tleStrings[2].substring(0, 1) == "2"
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if (!isLineOneValid && !isLineTwoValid) return@forEachLine
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parseTLE(tleStrings)?.let { tle -> parsedItems.add(tle) }
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lineIndex = 0
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}
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}
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return@withContext parsedItems
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}
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suspend fun parseJSONStream(stream: InputStream): List<SatRadio> = withContext(dispatcher) {
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val parsedItems = mutableListOf<SatRadio>()
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try {
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val jsonArray = JSONArray(stream.bufferedReader().readText())
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for (index in 0 until jsonArray.length()) {
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val jsonObject = jsonArray.getJSONObject(index)
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parseJSON(jsonObject)?.let { parsedItems.add(it) }
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}
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return@withContext parsedItems
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} catch (exception: Exception) {
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return@withContext parsedItems
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}
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}
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private fun parseCSV(values: List<String>): OrbitalData? {
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try {
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val name = values[0]
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val year = values[2].substring(0, 4)
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val month = values[2].substring(5, 7)
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val dayOfMonth = values[2].substring(8, 10)
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val dayInt = getDayOfYear(year.toInt(), month.toInt(), dayOfMonth.toInt())
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val day = if (dayInt < 10) "00$dayInt" else if (dayInt < 100) "0$dayInt" else "$dayInt"
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val hour = values[2].substring(11, 13).toInt() * 3600000 // ms in one hour
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val min = values[2].substring(14, 16).toInt() * 60000 // ms in one minute
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val sec = values[2].substring(17, 19).toInt() * 1000 // ms in one second
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val ms = values[2].substring(20, 26).toInt() / 1000.0 // microseconds to ms
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val frac = ((hour + min + sec + ms) / 86400000.0).toString()
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val epoch = "${year.substring(2)}$day${frac.substring(1)}".toDouble()
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val meanmo = values[3].toDouble()
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val eccn = values[4].toDouble()
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val incl = values[5].toDouble()
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val raan = values[6].toDouble()
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val argper = values[7].toDouble()
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val meanan = values[8].toDouble()
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val catnum = values[11].toInt()
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val bstar = values[14].toDouble()
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return OrbitalData(name, epoch, meanmo, eccn, incl, raan, argper, meanan, catnum, bstar)
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} catch (exception: Exception) {
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return null
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}
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}
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private fun parseTLE(tle: List<String>): OrbitalData? {
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if (tle[1].substring(0, 1) != "1" && tle[2].substring(0, 1) != "2") {
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return null
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}
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try {
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val name: String = tle[0].trim()
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val epoch: Double = tle[1].substring(18, 32).toDouble()
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val meanmo: Double = tle[2].substring(52, 63).toDouble()
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val eccn: Double = tle[2].substring(26, 33).toDouble() / 10000000.0
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val incl: Double = tle[2].substring(8, 16).toDouble()
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val raan: Double = tle[2].substring(17, 25).toDouble()
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val argper: Double = tle[2].substring(34, 42).toDouble()
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val meanan: Double = tle[2].substring(43, 51).toDouble()
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val catnum: Int = tle[1].substring(2, 7).trim().toInt()
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val bstar: Double = 1.0e-5 * tle[1].substring(53, 59).toDouble() / 10.0.pow(
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tle[1].substring(60, 61).toDouble()
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)
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return OrbitalData(name, epoch, meanmo, eccn, incl, raan, argper, meanan, catnum, bstar)
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} catch (exception: Exception) {
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return null
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}
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}
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private fun parseJSON(json: JSONObject): SatRadio? {
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try {
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val uuid = json.getString("uuid")
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val info = json.getString("description")
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val isAlive = json.getBoolean("alive")
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val downlink = if (json.isNull("downlink_low")) null
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else json.getLong("downlink_low")
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val uplink = if (json.isNull("uplink_low")) null
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else json.getLong("uplink_low")
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val mode = if (json.isNull("mode")) null
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else json.getString("mode")
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val isInverted = json.getBoolean("invert")
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val catnum = if (json.isNull("norad_cat_id")) null
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else json.getInt("norad_cat_id")
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return SatRadio(uuid, info, isAlive, downlink, uplink, mode, isInverted, catnum)
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} catch (exception: Exception) {
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return null
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}
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}
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private fun getDayOfYear(year: Int, month: Int, dayOfMonth: Int): Int {
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if (month == 1) return dayOfMonth
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val daysArray = arrayOf(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31)
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var dayOfYear = dayOfMonth
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// If leap year increment Feb days
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if (((year / 4 == 0) && (year / 100 != 0)) || (year / 400 == 0)) daysArray[1]++
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for (i in 0 until month - 1) dayOfYear += daysArray[i]
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return dayOfYear
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}
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}
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@@ -24,6 +24,7 @@ import com.rtbishop.look4sat.domain.repository.IDatabaseRepo
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import com.rtbishop.look4sat.domain.repository.ISettingsRepo
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import com.rtbishop.look4sat.domain.source.IDataSource
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import com.rtbishop.look4sat.domain.source.ILocalStorage
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import com.rtbishop.look4sat.domain.utility.DataParser
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import kotlinx.coroutines.CoroutineDispatcher
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import kotlinx.coroutines.async
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import kotlinx.coroutines.withContext
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