add crunchy intro metadata to parser and update the skip intro function, closes #66

app/src/main/java/org/mosad/teapod/parser/crunchyroll/Crunchyroll.kt

@@ -34,6 +34,7 @@ import io.ktor.http.*
 import io.ktor.serialization.kotlinx.json.*
 import kotlinx.coroutines.*
 import kotlinx.serialization.SerializationException
+import kotlinx.serialization.decodeFromString
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.json.JsonObject
 import kotlinx.serialization.json.buildJsonObject
@@ -52,6 +53,7 @@ object Crunchyroll {
         }
     }
     private const val baseUrl = "https://beta-api.crunchyroll.com"
+    private const val staticUrl = "https://static.crunchyroll.com"
     private const val basicApiTokenUrl = "https://gitlab.com/-/snippets/2274956/raw/main/snippetfile1.txt"
     private var basicApiToken: String = ""
 
@@ -164,12 +166,15 @@ object Crunchyroll {
         }
     }
 
+    /**
+     * Send a HTTP GET request with [params] to the [endpoint] at [url], if url is empty use baseUrl
+     */
     private suspend inline fun <reified T> requestGet(
         endpoint: String,
         params: List<Pair<String, Any?>> = listOf(),
         url: String = ""
     ): T {
-        val path = url.ifEmpty { "$baseUrl$endpoint" }
+        val path = url.ifEmpty { baseUrl }.plus(endpoint)
 
         return request(path, HttpMethod.Get, params)
     }
@@ -583,6 +588,23 @@ object Crunchyroll {
         }
     }
 
+    /**
+     * Get the intro meta data including start, end and duration of the intro.
+     *
+     * @param episodeId A episode ID as strings.
+     */
+    suspend fun datalabIntro(episodeId: String): DatalabIntro {
+        val datalabIntroEndpoint = "/datalab-intro-v2/$episodeId.json"
+
+        return try {
+            val response: HttpResponse = requestGet(datalabIntroEndpoint, url = staticUrl)
+            Json.decodeFromString(response.bodyAsText())
+        } catch (ex: SerializationException) {
+            Log.e(TAG, "SerializationException in datalabIntro(). EpisodeId=$episodeId", ex)
+            NoneDatalabIntro
+        }
+    }
+
     /**
      * Get similar media for a show/movie.
      *

app/src/main/java/org/mosad/teapod/parser/crunchyroll/DataTypes.kt

@@ -347,6 +347,22 @@ data class PlayheadObject(
     @SerialName("last_modified") val lastModified: String,
 )
 
+/**
+ * Meta data for a episode intro. All time values are in seconds.
+ */
+@Serializable
+data class DatalabIntro(
+    @SerialName("media_id") val mediaId: String,
+    @SerialName("startTime") val startTime: Float,
+    @SerialName("endTime") val endTime: Float,
+    @SerialName("duration") val duration: Float,
+    @SerialName("comparedWith") val comparedWith: String,
+    @SerialName("ordering") val ordering: String,
+    @SerialName("last_updated") val lastUpdated: String,
+)
+
+val NoneDatalabIntro = DatalabIntro("", 0f, 0f, 0f, "", "", "")
+
 /**
  * playback/stream data classes
  */

app/src/main/java/org/mosad/teapod/ui/activity/player/PlayerActivity.kt

@@ -325,19 +325,18 @@ class PlayerActivity : AppCompatActivity() {
                     hideButtonNextEp()
                 }
 
-                // if meta data is present and opening_start & opening_duration are valid, show skip opening
+                // into metadata is present and we can show the skip button
-                model.currentEpisodeMeta?.let {
+                if (model.currentIntroMetadata.duration >= 10) {
-                    if (it.openingDuration > 0 &&
+                    val startTime = model.currentIntroMetadata.startTime.toInt() * 1000
-                        currentPosition in it.openingStart..(it.openingStart + 10000) &&
+                    if (currentPosition in startTime..(startTime + 10000) && !playerBinding.buttonSkipOp.isVisible) {
-                        !playerBinding.buttonSkipOp.isVisible
-                    ) {
                         showButtonSkipOp()
                     } else if (playerBinding.buttonSkipOp.isVisible &&
-                        currentPosition !in it.openingStart..(it.openingStart + 10000)
+                        currentPosition !in startTime..(startTime + 10000)
                     ) {
-                        // the button should only be visible, if currentEpisodeMeta != null
+                        // the button should only be visible if currentEpisodeMeta != null
                         hideButtonSkipOp()
                     }
+
                 }
 
                 // if controls are visible, update them
@@ -452,8 +451,9 @@ class PlayerActivity : AppCompatActivity() {
 
     private fun skipOpening() {
         // calculate the seek time
-        model.currentEpisodeMeta?.let {
+        if (model.currentIntroMetadata.duration > 10) {
-            val seekTime = (it.openingStart + it.openingDuration) - model.player.currentPosition
+            val endTime = model.currentIntroMetadata.endTime.toInt() * 1000
+            val seekTime = endTime - model.player.currentPosition
             model.seekToOffset(seekTime)
         }
     }

app/src/main/java/org/mosad/teapod/ui/activity/player/PlayerViewModel.kt

@@ -65,6 +65,8 @@ class PlayerViewModel(application: Application) : AndroidViewModel(application)
         internal set
     var currentPlayheads: PlayheadsMap = mutableMapOf()
         internal set
+    var currentIntroMetadata: DatalabIntro = NoneDatalabIntro
+        internal set
 //    var tmdbTVSeason: TMDBTVSeason? =null
 //        internal set
 
@@ -148,6 +150,10 @@ class PlayerViewModel(application: Application) : AndroidViewModel(application)
 
     // player actions
 
+    /**
+     * Seeks to a offset position specified in milliseconds in the current MediaItem.
+     * @param offset The offset position in the current MediaItem.
+     */
     fun seekToOffset(offset: Long) {
         player.seekTo(player.currentPosition + offset)
     }
@@ -201,6 +207,9 @@ class PlayerViewModel(application: Application) : AndroidViewModel(application)
                             (it.playhead.times(1000)).toLong()
                         }
                     }
+                },
+                viewModelScope.launch(Dispatchers.IO) {
+                    currentIntroMetadata = Crunchyroll.datalabIntro(currentEpisode.id)
                 }
             )
         }