feat : invalidate link cache after 20 mins (#875)

- additionaly clear cache if there is player errors or no links found

Co-authored-by: coxju <coxju>

app/src/main/java/com/lagradost/cloudstream3/ui/player/AbstractPlayerFragment.kt

@@ -102,6 +102,10 @@ abstract class AbstractPlayerFragment(
         throw NotImplementedError()
     }
 
+    open fun playerStatusChanged(){
+        throw NotImplementedError()
+    }
+
     open fun playerDimensionsLoaded(width: Int, height: Int) {
         throw NotImplementedError()
     }
@@ -431,6 +435,7 @@ abstract class AbstractPlayerFragment(
 
             is StatusEvent -> {
                 updateIsPlaying(wasPlaying = event.wasPlaying, isPlaying = event.isPlaying)
+                playerStatusChanged()
             }
 
             is PositionEvent -> {

app/src/main/java/com/lagradost/cloudstream3/ui/player/GeneratorPlayer.kt

@@ -146,6 +146,12 @@ class GeneratorPlayer : FullScreenPlayer() {
         }
     }
 
+    override fun playerStatusChanged() {
+        if(player.getIsPlaying()){
+            viewModel.forceClearCache = false
+        }
+    }
+
     private fun noSubtitles(): Boolean {
         return setSubtitles(null)
     }
@@ -913,10 +919,15 @@ class GeneratorPlayer : FullScreenPlayer() {
 
     override fun playerError(exception: Throwable) {
         Log.i(TAG, "playerError = $currentSelectedLink")
+        if(!hasNextMirror()){
+            viewModel.forceClearCache = true
+        }
         super.playerError(exception)
     }
 
     private fun noLinksFound() {
+        viewModel.forceClearCache = true
+
         showToast(R.string.no_links_found_toast, Toast.LENGTH_SHORT)
         activity?.popCurrentPage()
     }

app/src/main/java/com/lagradost/cloudstream3/ui/player/PlayerGeneratorViewModel.kt

@@ -45,6 +45,8 @@ class PlayerGeneratorViewModel : ViewModel() {
      */
     private var currentLoadingEpisodeId: Int? = null
 
+    var forceClearCache = false
+
     fun setSubtitleYear(year: Int?) {
         _currentSubtitleYear.postValue(year)
     }
@@ -168,7 +170,7 @@ class PlayerGeneratorViewModel : ViewModel() {
         }
     }
 
-    fun loadLinks(clearCache: Boolean = false, type: LoadType = LoadType.InApp) {
+    fun loadLinks(type: LoadType = LoadType.InApp) {
         Log.i(TAG, "loadLinks")
         currentJob?.cancel()
 
@@ -183,7 +185,7 @@ class PlayerGeneratorViewModel : ViewModel() {
             // load more data
             _loadingLinks.postValue(Resource.Loading())
             val loadingState = safeApiCall {
-                generator?.generateLinks(type = type, clearCache = clearCache, callback = {
+                generator?.generateLinks(type = type, clearCache = forceClearCache, callback = {
                     currentLinks.add(it)
                     // Clone to prevent ConcurrentModificationException
                     normalSafeApiCall {

app/src/main/java/com/lagradost/cloudstream3/ui/player/RepoLinkGenerator.kt

@@ -2,6 +2,7 @@ package com.lagradost.cloudstream3.ui.player
 
 import android.util.Log
 import com.lagradost.cloudstream3.APIHolder.getApiFromNameNull
+import com.lagradost.cloudstream3.APIHolder.unixTime
 import com.lagradost.cloudstream3.LoadResponse
 import com.lagradost.cloudstream3.ui.APIRepository
 import com.lagradost.cloudstream3.ui.result.ResultEpisode
@@ -10,6 +11,12 @@ import com.lagradost.cloudstream3.utils.ExtractorUri
 import kotlin.math.max
 import kotlin.math.min
 
+data class Cache(
+    val linkCache: MutableSet<ExtractorLink>,
+    val subtitleCache: MutableSet<SubtitleData>,
+    var lastCachedTimestamp: Long = unixTime
+)
+
 class RepoLinkGenerator(
     private val episodes: List<ResultEpisode>,
     private var currentIndex: Int = 0,
@@ -17,7 +24,7 @@ class RepoLinkGenerator(
 ) : IGenerator {
     companion object {
         const val TAG = "RepoLink"
-        val cache: HashMap<Pair<String, Int>, Pair<MutableSet<ExtractorLink>, MutableSet<SubtitleData>>> =
+        val cache: HashMap<Pair<String, Int>, Cache> =
             hashMapOf()
     }
 
@@ -76,10 +83,10 @@ class RepoLinkGenerator(
         val index = currentIndex
         val current = episodes.getOrNull(index + offset) ?: return false
 
-        val (currentLinkCache, currentSubsCache) = if (clearCache) {
+        val (currentLinkCache, currentSubsCache, lastCachedTimestamp) = if (clearCache) {
-            Pair(mutableSetOf(), mutableSetOf())
+            Cache(mutableSetOf(), mutableSetOf(), unixTime)
         } else {
-            cache[current.apiName to current.id] ?: Pair(mutableSetOf(), mutableSetOf())
+            cache[current.apiName to current.id] ?: Cache(mutableSetOf(), mutableSetOf(), unixTime)
         }
 
         //val currentLinkCache = if (clearCache) mutableSetOf() else linkCache[index].toMutableSet()
@@ -89,6 +96,12 @@ class RepoLinkGenerator(
         val currentSubsUrls = mutableSetOf<String>()    // makes all subs urls unique
         val currentSubsNames = mutableSetOf<String>()   // makes all subs names unique
 
+        val invalidateCache = unixTime - lastCachedTimestamp  > 60 * 20 // 20 minutes
+        if(invalidateCache){
+            currentLinkCache.clear()
+            currentSubsCache.clear()
+        }
+
         currentLinkCache.filter { allowedTypes.contains(it.type) }.forEach { link ->
             currentLinks.add(link.url)
             callback(link to null)
@@ -147,7 +160,7 @@ class RepoLinkGenerator(
                 }
             }
         )
-        cache[Pair(current.apiName, current.id)] = Pair(currentLinkCache, currentSubsCache)
+        cache[Pair(current.apiName, current.id)] = Cache(currentLinkCache, currentSubsCache, unixTime)
 
         return result
     }