added Airtime API and progress bar

app/build.gradle

         applicationId "fr.forum_thalie.tsumugi"
         minSdkVersion 16
         targetSdkVersion 29
-        versionCode 100
-        versionName "1.0.0"
+        versionCode 110
+        versionName "1.1.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
     }

app/src/main/AndroidManifest.xml

                 <action android:name="android.media.browse.MediaBrowserService" />
             </intent-filter>
         </service>
-        <service android:name=".streamerNotificationService.StreamerMonitorService"
-            android:enabled="true"
-            android:exported="true"/>
 
         <receiver android:name=".BootBroadcastReceiver"
             android:directBootAware="true"

app/src/main/java/fr/forum_thalie/tsumugi/BootBroadcastReceiver.kt

 
         if (arg1.getStringExtra("action") == "$tag.${Actions.PLAY_OR_FALLBACK.name}" )
         {
+
             RadioAlarm.instance.setNextAlarm(context) // schedule next alarm
+            if (!PlayerStore.instance.isInitialized)
+                PlayerStore.instance.initApi()
             if (PlayerStore.instance.streamerName.value.isNullOrBlank())
                 PlayerStore.instance.initPicture(context)
+            // TODO: add initialization for programme.
 
             val i = Intent(context, RadioService::class.java)
             i.putExtra("action", Actions.PLAY_OR_FALLBACK.name)

app/src/main/java/fr/forum_thalie/tsumugi/MainActivity.kt

         colorGreenListCompat = (ResourcesCompat.getColorStateList(resources, R.color.button_green_compat, null))
         colorAccent = (ResourcesCompat.getColor(resources, R.color.colorAccent, null))
 
+        PlayerStore.instance.initUrl(this)
+        PlayerStore.instance.initApi()
+
         // Post-UI Launch
         if (PlayerStore.instance.isInitialized)
         {

app/src/main/java/fr/forum_thalie/tsumugi/RadioService.kt

 
     private val titleObserver = Observer<String> {
         // We're checking if a new song arrives. If so, we put the currentSong in Lp and update the backup.
+
+        if (PlayerStore.instance.playbackState.value == PlaybackStateCompat.STATE_PLAYING)
+        {
+            Log.d(tag, radioTag + "SONG CHANGED AND PLAYING")
+            // we activate latency compensation only if it's been at least 2 songs...
+            when {
+                PlayerStore.instance.isStreamDown -> {
+                    // if we reach here, it means that the observer has been called by a new song and that the stream was down previously.
+                    // so the stream is now back to normal.
+                    PlayerStore.instance.isStreamDown = false
+                    PlayerStore.instance.initApi()
+                }
+                PlayerStore.instance.currentSong.title.value == noConnectionValue -> {
+                    PlayerStore.instance.isStreamDown = true
+                }
+                else -> {
+                    PlayerStore.instance.fetchApi(numberOfSongs >= 2)
+                }
+            }
+        }
+
         if (PlayerStore.instance.currentSong != PlayerStore.instance.currentSongBackup
             && it != noConnectionValue)
         {
 
         preferenceStore = PreferenceManager.getDefaultSharedPreferences(this)
 
+        // start ticker for when the player is stopped
+        val periodString = PreferenceManager.getDefaultSharedPreferences(this).getString("fetchPeriod", "10") ?: "10"
+        val period: Long = Integer.parseInt(periodString).toLong()
+        if (period > 0)
+            apiTicker.schedule(ApiFetchTick(), 0, period * 1000)
+
         // Define managers
         telephonyManager = getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager
         telephonyManager?.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE)

app/src/main/java/fr/forum_thalie/tsumugi/Tickers.kt

 package fr.forum_thalie.tsumugi
 
+import android.support.v4.media.session.PlaybackStateCompat
 import fr.forum_thalie.tsumugi.playerstore.PlayerStore
 import java.util.*
 
+class ApiFetchTick  : TimerTask() {
+    override fun run() {
+        if (PlayerStore.instance.playbackState.value == PlaybackStateCompat.STATE_STOPPED)
+        {
+            PlayerStore.instance.fetchApi()
+        }
+    }
+}
+
 class Tick  : TimerTask() {
     override fun run() {
         PlayerStore.instance.currentTime.postValue(PlayerStore.instance.currentTime.value!! + 500)

app/src/main/java/fr/forum_thalie/tsumugi/playerstore/PlayerStore.kt

 import android.util.Log
 import androidx.lifecycle.MutableLiveData
 import fr.forum_thalie.tsumugi.*
+import org.json.JSONObject
+import java.net.URL
+import java.text.ParseException
+import java.text.SimpleDateFormat
+import java.util.*
+import kotlin.collections.ArrayList
 
 class PlayerStore {
 
+    private lateinit var urlToScrape: String
     val isPlaying: MutableLiveData<Boolean> = MutableLiveData()
     val isServiceStarted: MutableLiveData<Boolean> = MutableLiveData()
     val volume: MutableLiveData<Int> = MutableLiveData()
     val listenersCount: MutableLiveData<Int> = MutableLiveData()
     var latencyCompensator : Long = 0
     var isInitialized: Boolean = false
+    var isStreamDown: Boolean = false
 
     init {
         playbackState.value = PlaybackStateCompat.STATE_STOPPED
         listenersCount.value = 0
     }
 
+    fun initUrl(c: Context)
+    {
+        urlToScrape = c.getString(R.string.API_URL)
+    }
+
+    private fun getTimestamp(s: String) : Long
+    {
+        val dateFormat = SimpleDateFormat("yyyy-MM-dd hh:mm:ss", Locale.getDefault())
+        try {
+            val t: Date? = dateFormat.parse(s)
+            return t!!.time
+        } catch (e: ParseException) {
+            e.printStackTrace()
+        }
+        return 0
+    }
+
+
+    // ##################################################
+    // ################# API FUNCTIONS ##################
+    // ##################################################
+
+    private fun updateApi(res: JSONObject, isCompensatingLatency : Boolean = false) {
+        // If we're not in PLAYING state, update title / artist metadata. If we're playing, the ICY will take care of that.
+
+        val resMain = res.getJSONObject("tracks").getJSONObject("current")
+        if (playbackState.value != PlaybackStateCompat.STATE_PLAYING || currentSong.title.value.isNullOrEmpty()
+            || currentSong.title.value == noConnectionValue)
+            currentSong.setTitleArtist(resMain.getString("name"))
+
+        val starts = getTimestamp(resMain.getString("starts"))
+        val ends = getTimestamp(resMain.getString("ends"))
+
+        if (currentSong.startTime.value != starts)
+            currentSong.startTime.value = starts
+
+        currentSong.stopTime.value = ends
+
+        // I noticed that the server has a big (3 to 9 seconds !!) offset for current time.
+        // we can measure it when the player is playing, to compensate it and have our progress bar perfectly timed
+        // latencyCompensator is set to null when beginPlaying() (we can't measure it at the moment we start playing, since we're in the middle of a song),
+        // at this moment, we set it to 0. Then, next time the updateApi is called when we're playing, we measure the latency and we set out latencyComparator.
+        if(isCompensatingLatency)
+        {
+            latencyCompensator = getTimestamp(res.getJSONObject("station").getString("schedulerTime")) - (currentSong.startTime.value ?: getTimestamp(res.getJSONObject("station").getString("schedulerTime")))
+            Log.d(tag, playerStoreTag +  "latency compensator set to ${(latencyCompensator).toFloat()/1000} s")
+        }
+        currentTime.value = getTimestamp(res.getJSONObject("station").getString("schedulerTime")) - (latencyCompensator)
+
+        /*
+        val listeners = resMain.getInt("listeners")
+        listenersCount.value = listeners
+        Log.d(tag, playerStoreTag +  "store updated")
+         */
+    }
+
+    private val scrape : (Any?) -> String =
+        {
+            URL(urlToScrape).readText()
+        }
+
+    /* initApi is called :
+        - at startup
+        - when a streamer changes.
+        the idea is to fetch the queue when a streamer changes (potentially Hanyuu), and at startup.
+        The Last Played is only fetched if it's empty (so, only at startup), not when a streamer changes.
+     */
+    fun initApi()
+    {
+        val post : (parameter: Any?) -> Unit = {
+            val result = JSONObject(it as String)
+            if (result.has("tracks"))
+            {
+                updateApi(result)
+                currentSongBackup.copy(currentSong)
+
+                isQueueUpdated.value = true
+
+                isLpUpdated.value = true
+            }
+            isInitialized = true
+        }
+        Async(scrape, post)
+    }
+
+    fun fetchApi(isCompensatingLatency: Boolean = false) {
+        val post: (parameter: Any?) -> Unit = {
+            val result = JSONObject(it as String)
+            if (!result.isNull("tracks"))
+            {
+                updateApi(result, isCompensatingLatency)
+            }
+        }
+        Async(scrape, post)
+    }
+
+    private fun extractSong(songJSON: JSONObject) : Song {
+        val song = Song()
+        song.setTitleArtist(songJSON.getString("meta"))
+        song.startTime.value = songJSON.getLong("timestamp")
+        song.stopTime.value = song.startTime.value
+        song.type.value = songJSON.getInt("type")
+        return song
+    }
+
+
     // ##################################################
     // ############## QUEUE / LP FUNCTIONS ##############
     // ##################################################

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

             android:progressDrawable="@drawable/progress_bar_progress"
             app:layout_constraintBottom_toTopOf="@id/play_pause"
             tools:layout_editor_absoluteX="0dp"
-            android:visibility="gone"/>
+            android:visibility="visible"/>
 
         <!-- REMOVE VISIBILITY GONE IF YOU HAVE TIME VALUES TO DISPLAY THE PROGRESS BAR -->
         <TextView
             android:textAlignment="textEnd"
             app:layout_constraintEnd_toEndOf="@id/progressBar"
             app:layout_constraintTop_toBottomOf="@id/progressBar"
-            android:visibility="gone"/>
+            android:visibility="visible"/>
 
         <!-- REMOVE VISIBILITY GONE IF YOU HAVE TIME VALUES TO DISPLAY THE PROGRESS BAR -->
         <TextView
             android:textAlignment="textStart"
             app:layout_constraintStart_toStartOf="@id/progressBar"
             app:layout_constraintTop_toBottomOf="@id/progressBar"
-            android:visibility="gone"/>
+            android:visibility="visible"/>
 
 
 

app/src/main/res/values/strings.xml

     <string name="github_url_new_issue">https://github.com/yattoz/Tsumugi-app/issues/</string>
     <string name="website_url">https://tsumugi.forum-thalie.fr/</string>
     <string name="rss_url">https://tsumugi.forum-thalie.fr/?feed=rss2</string>
+    <string name="API_URL">https://radio.mahoro-net.org/airtime/api/live-info-v2</string>
     <string name="planning_url">ADD SOME URL HERE</string>