ref: v3.7.0
app/src/main/java/xyz/apiote/bimba/czwek/api/transitousDepartures.kt
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// SPDX-FileCopyrightText: Adam Evyčędo // // SPDX-License-Identifier: AGPL-3.0-or-later package xyz.apiote.bimba.czwek.api import android.content.Context import android.util.JsonReader import android.util.JsonToken import android.util.Log import kotlinx.coroutines.Dispatchers import kotlinx.coroutines.withContext import xyz.apiote.bimba.czwek.R import xyz.apiote.bimba.czwek.api.responses.ErrorResponse import xyz.apiote.bimba.czwek.repo.Alert import xyz.apiote.bimba.czwek.repo.Colour import xyz.apiote.bimba.czwek.repo.CongestionLevel import xyz.apiote.bimba.czwek.repo.Departure import xyz.apiote.bimba.czwek.repo.LineStub import xyz.apiote.bimba.czwek.repo.LineType import xyz.apiote.bimba.czwek.repo.OccupancyStatus import xyz.apiote.bimba.czwek.repo.Position import xyz.apiote.bimba.czwek.repo.Stop import xyz.apiote.bimba.czwek.repo.StopDepartures import xyz.apiote.bimba.czwek.repo.TrafficResponseException import xyz.apiote.bimba.czwek.repo.Vehicle import xyz.apiote.bimba.czwek.units.Mps import java.security.MessageDigest import java.time.Instant import java.time.LocalDate import java.time.ZoneId import java.time.ZonedDateTime @OptIn(ExperimentalStdlibApi::class) suspend fun getTransitousDepartures( context: Context, stop: String, date: LocalDate?, limit: Int? ): StopDepartures { if (!isNetworkAvailable(context)) { throw TrafficResponseException(0, "", Error(0, R.string.error_offline, R.drawable.error_net)) } // TODO shouldn't it be start-of-day in stop's timezone? val timestamp = date?.atStartOfDay(ZoneId.systemDefault())?.toEpochSecond() ?: ZonedDateTime.now() .toEpochSecond() val json = """ { "destination": { "type": "Module", "target": "/railviz/get_station" }, "content_type": "RailVizStationRequest", "content": { "station_id": "$stop", "time": $timestamp, "event_count": ${limit ?: 12}, "direction": "LATER", "by_schedule_time": false } } """ val result = askTransitous(context, json) if (result.error != null) { if (result.stream != null) { val response = withContext(Dispatchers.IO) { ErrorResponse.unmarshal(result.stream) } throw TrafficResponseException(result.error.statusCode, response.message, result.error) } else { throw TrafficResponseException(result.error.statusCode, "", result.error) } } else { return withContext(Dispatchers.IO) { val departures = mutableListOf<Departure>() var stopID = "" var stopName = "" var latitude = 0.0 var longitude = 0.0 val r = JsonReader(result.stream!!.bufferedReader()) r.withObject { name -> if (name != "content") { r.skipValue() return@withObject } r.withObject { name -> when (name) { "events" -> { r.withArray { var reason = "" var eventTimestamp: Long = 0 var valid = false var tripID = "" var idLineID = "" var stationID = "" var targetStationID = "" var targetTimestamp = 0 var idTimestamp = 0 var trainNr = 0 var clasz = -1 var direction = "" var lineID = "" var lineName = "" var lineColour = "" var eventType = "" r.withObject { name -> when (name) { "event" -> { r.withObject { name -> when (name) { "reason" -> reason = r.nextString() "schedule_time" -> r.skipValue() "schedule_track" -> r.skipValue() "time" -> eventTimestamp = r.nextLong() "track" -> r.skipValue() "valid" -> valid = r.nextBoolean() else -> r.skipValue() } } } "trips" -> { r.withArray { i -> if (i == 0) { r.withObject { name -> when (name) { "id" -> { r.withObject { name -> when (name) { "id" -> tripID = r.nextString() "line_id" -> idLineID = r.nextString() "station_id" -> stationID = r.nextString() "target_station_id" -> targetStationID = r.nextString() "target_time" -> targetTimestamp = r.nextInt() "time" -> idTimestamp = r.nextInt() "train_nr" -> trainNr = r.nextInt() else -> r.skipValue() } } } "transport" -> { r.withObject { name -> Log.d("WithObject", "next is ${name}") when (name) { "clasz" -> clasz = r.nextInt() "direction" -> direction = r.nextString() "line_id" -> lineID = r.nextString() "name" -> lineName = r.nextString() "provider" -> r.skipValue() "provider_url" -> r.skipValue() "range" -> r.skipValue() "route_color" -> lineColour = r.nextString() "route_text_color" -> r.skipValue() else -> r.skipValue() } } } else -> r.skipValue() } } } else { r.skipValue() } } } "type" -> { eventType = r.nextString() } else -> r.skipValue() } } if (eventType == "ARR") { val hash = MessageDigest.getInstance("SHA-256").let { it.update(tripID.toByteArray()) it.update(idLineID.toByteArray()) it.update(stationID.toByteArray()) it.update(targetStationID.toByteArray()) it.update(targetTimestamp.toHexString().toByteArray()) it.update(idTimestamp.toHexString().toByteArray()) it.update(trainNr.toHexString().toByteArray()) it.digest() }.toHexString() val t = ZonedDateTime.ofInstant( Instant.ofEpochSecond(eventTimestamp), ZoneId.systemDefault() ) departures.add( Departure( ID = hash, time = Time( t.hour.toUInt(), t.minute.toUInt(), t.second.toUInt(), (t.dayOfYear - ZonedDateTime.now().dayOfYear).toByte(), ZoneId.systemDefault().id ), status = 0u, isRealtime = reason in setOf("IS", "PROPAGATION", "FORECAST"), vehicle = Vehicle( "", Position(0.0, 0.0), 0u, Mps(0), LineStub( lineName, LineType.fromTransitous(clasz), Colour.fromHex(lineColour) ), direction, CongestionLevel.UNKNOWN, OccupancyStatus.UNKNOWN ), boarding = 0xffu, alerts = emptyList(), exact = true, terminusArrival = !valid ) ) } } } "station" -> { r.withObject { name -> when (name) { "id" -> stopID = r.nextString() "name" -> stopName = r.nextString() "pos" -> { r.withObject { posName -> when (posName) { "lat" -> latitude = r.nextDouble() "lng" -> longitude = r.nextDouble() } } } } } } else -> r.skipValue() } } } return@withContext StopDepartures( departures, Stop(stopID, stopName, stopName, "", "transitous", Position(latitude, longitude), listOf()), listOf() ) } } } fun JsonReader.withObject(f: (String) -> Unit) { beginObject() while (hasNext()) { try { f(nextName()) } catch (e: IllegalStateException) { val a: JsonToken = this.peek() Log.d("WithObject", "next is ${a.name} ${nextString()}") throw e } } endObject() } fun JsonReader.withArray(f: (Int) -> Unit) { beginArray() var i = 0 while (hasNext()) { f(i) i++ } endArray() } |