feat: support for importing watch history from YouTube

app/src/main/java/com/github/libretube/db/DatabaseHelper.kt

@@ -23,8 +23,8 @@ object DatabaseHelper {
         videoId,
         streams.toStreamItem(videoId)
     )
-    suspend fun addToWatchHistory(videoId: String, stream: StreamItem) =
+
-        withContext(Dispatchers.IO) {
+    suspend fun addToWatchHistory(videoId: String, stream: StreamItem) {
         val watchHistoryItem = WatchHistoryItem(
             videoId,
             stream.title,
@@ -36,6 +36,12 @@ object DatabaseHelper {
             stream.thumbnail,
             stream.duration
         )
+
+        addToWatchHistory(watchHistoryItem)
+    }
+
+    suspend fun addToWatchHistory(watchHistoryItem: WatchHistoryItem) =
+        withContext(Dispatchers.IO) {
             Database.watchHistoryDao().insert(watchHistoryItem)
             val maxHistorySize = PreferenceHelper.getString(
                 PreferenceKeys.WATCH_HISTORY_SIZE,

app/src/main/java/com/github/libretube/enums/SupportedClient.kt

@@ -7,5 +7,6 @@ enum class ImportFormat(@StringRes val value: Int) {
     NEWPIPE(R.string.import_format_newpipe),
     FREETUBE(R.string.import_format_freetube),
     YOUTUBECSV(R.string.import_format_youtube_csv),
+    YOUTUBEJSON(R.string.youtube),
     PIPED(R.string.import_format_piped)
 }

app/src/main/java/com/github/libretube/helpers/ImportHelper.kt

@@ -1,6 +1,7 @@
 package com.github.libretube.helpers
 
 import android.app.Activity
+import android.content.Context
 import android.net.Uri
 import android.util.Log
 import com.github.libretube.R
@@ -8,7 +9,9 @@ import com.github.libretube.api.JsonHelper
 import com.github.libretube.api.PlaylistsHelper
 import com.github.libretube.api.RetrofitInstance
 import com.github.libretube.api.SubscriptionHelper
+import com.github.libretube.db.DatabaseHelper
 import com.github.libretube.db.DatabaseHolder.Database
+import com.github.libretube.db.obj.WatchHistoryItem
 import com.github.libretube.enums.ImportFormat
 import com.github.libretube.extensions.TAG
 import com.github.libretube.extensions.toastFromMainDispatcher
@@ -19,6 +22,7 @@ import com.github.libretube.obj.NewPipeSubscription
 import com.github.libretube.obj.NewPipeSubscriptions
 import com.github.libretube.obj.PipedImportPlaylist
 import com.github.libretube.obj.PipedPlaylistFile
+import com.github.libretube.obj.YouTubeWatchHistoryFileItem
 import com.github.libretube.ui.dialogs.ShareDialog
 import com.github.libretube.util.TextUtils
 import kotlinx.serialization.ExperimentalSerializationApi
@@ -27,6 +31,8 @@ import kotlinx.serialization.json.encodeToStream
 import java.util.stream.Collectors
 
 object ImportHelper {
+    private const val IMPORT_THUMBNAIL_QUALITY = "mqdefault"
+
     /**
      * Import subscriptions by a file uri
      */
@@ -254,4 +260,43 @@ object ImportHelper {
             else -> Unit
         }
     }
+
+    @OptIn(ExperimentalSerializationApi::class)
+    suspend fun importWatchHistory(context: Context, uri: Uri, importFormat: ImportFormat) {
+        val videos = when (importFormat) {
+            ImportFormat.YOUTUBEJSON -> {
+                context.contentResolver.openInputStream(uri)?.use {
+                    JsonHelper.json.decodeFromStream<List<YouTubeWatchHistoryFileItem>>(it)
+                }
+                    .orEmpty()
+                    .filter { it.activityControls.contains("YouTube watch history") }
+                    .reversed()
+                    .map {
+                        val videoId = it.titleUrl.substring(it.titleUrl.length - 11)
+
+                        WatchHistoryItem(
+                            videoId = videoId,
+                            title = it.title.replaceFirst("Watched ", ""),
+                            uploader = it.subtitles.firstOrNull()?.name,
+                            uploaderUrl = it.subtitles.firstOrNull()?.url?.let { url ->
+                                url.substring(url.length - 24)
+                            },
+                            thumbnailUrl = "https://img.youtube.com/vi/${videoId}/${IMPORT_THUMBNAIL_QUALITY}.jpg"
+                        )
+                    }
+            }
+
+            else -> emptyList()
+        }
+
+        for (video in videos) {
+            DatabaseHelper.addToWatchHistory(video)
+        }
+
+        if (videos.isEmpty()) {
+            context.toastFromMainDispatcher(R.string.emptyList)
+        } else {
+            context.toastFromMainDispatcher(R.string.success)
+        }
+    }
 }

app/src/main/java/com/github/libretube/obj/YouTubeWatchHistoryChannelInfo.kt

@@ -0,0 +1,9 @@
+package com.github.libretube.obj
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class YouTubeWatchHistoryChannelInfo(
+    val name: String,
+    val url: String
+)

app/src/main/java/com/github/libretube/obj/YouTubeWatchHistoryFileItem.kt

@@ -0,0 +1,14 @@
+package com.github.libretube.obj
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class YouTubeWatchHistoryFileItem(
+    val activityControls: List<String>,
+    val header: String,
+    val products: List<String>,
+    val subtitles: List<YouTubeWatchHistoryChannelInfo>,
+    val time: String,
+    val title: String,
+    val titleUrl: String
+)

app/src/main/java/com/github/libretube/ui/adapters/WatchHistoryAdapter.kt

@@ -3,6 +3,7 @@ package com.github.libretube.ui.adapters
 import android.view.LayoutInflater
 import android.view.ViewGroup
 import androidx.core.os.bundleOf
+import androidx.core.view.isGone
 import androidx.recyclerview.widget.RecyclerView
 import com.github.libretube.constants.IntentData
 import com.github.libretube.databinding.VideoRowBinding
@@ -54,9 +55,19 @@ class WatchHistoryAdapter(
             videoTitle.text = video.title
             channelName.text = video.uploader
             videoInfo.text = video.uploadDate?.let { TextUtils.localizeDate(it) }
-            thumbnailDuration.setFormattedDuration(video.duration!!, null)
             ImageHelper.loadImage(video.thumbnailUrl, thumbnail)
+
+            if (video.duration != null) {
+                thumbnailDuration.setFormattedDuration(video.duration, null)
+            } else {
+                thumbnailDurationCard.isGone = true
+            }
+
+            if (video.uploaderAvatar != null) {
                 ImageHelper.loadImage(video.uploaderAvatar, channelImage, true)
+            } else {
+                channelImage.isGone = true
+            }
 
             channelImage.setOnClickListener {
                 NavigationHelper.navigateChannel(root.context, video.uploaderUrl)
@@ -81,7 +92,7 @@ class WatchHistoryAdapter(
                 true
             }
 
-            watchProgress.setWatchProgressLength(video.videoId, video.duration)
+            if (video.duration != null) watchProgress.setWatchProgressLength(video.videoId, video.duration)
         }
     }
 }

app/src/main/java/com/github/libretube/ui/preferences/BackupRestoreSettings.kt

@@ -29,28 +29,25 @@ class BackupRestoreSettings : BasePreferenceFragment() {
     private val backupDateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd-HH:mm:ss")
     private var backupFile = BackupFile()
     private var importFormat: ImportFormat = ImportFormat.NEWPIPE
-    private val importSubscriptionFormatList
+    private val importSubscriptionFormatList = listOf(
-        get() = listOf(
         ImportFormat.NEWPIPE,
         ImportFormat.FREETUBE,
         ImportFormat.YOUTUBECSV
     )
-    private val exportSubscriptionFormatList
+    private val exportSubscriptionFormatList = listOf(
-        get() = listOf(
         ImportFormat.NEWPIPE,
         ImportFormat.FREETUBE
     )
-    private val importPlaylistFormatList
+    private val importPlaylistFormatList = listOf(
-        get() = listOf(
         ImportFormat.PIPED,
         ImportFormat.FREETUBE,
         ImportFormat.YOUTUBECSV
     )
-    private val exportPlaylistFormatList
+    private val exportPlaylistFormatList = listOf(
-        get() = listOf(
         ImportFormat.PIPED,
         ImportFormat.FREETUBE
     )
+    private val importWatchHistoryFormatList = listOf(ImportFormat.YOUTUBEJSON)
 
     override val titleResourceId: Int = R.string.backup_restore
 
@@ -94,9 +91,8 @@ class BackupRestoreSettings : BasePreferenceFragment() {
         }
     }
 
-    /**
+
-     * result listeners for importing and exporting playlists
+    // result listeners for importing and exporting playlists
-     */
     private val getPlaylistsFile =
         registerForActivityResult(ActivityResultContracts.OpenMultipleDocuments()) {
             it?.forEach {
@@ -106,6 +102,15 @@ class BackupRestoreSettings : BasePreferenceFragment() {
             }
         }
 
+    private val getWatchHistoryFile =
+        registerForActivityResult(ActivityResultContracts.OpenMultipleDocuments()) {
+            it?.forEach {
+                CoroutineScope(Dispatchers.IO).launch {
+                    ImportHelper.importWatchHistory(requireActivity(), it, importFormat)
+                }
+            }
+        }
+
     private val createPlaylistsFile = registerForActivityResult(CreateDocument(JSON)) {
         it?.let {
             lifecycleScope.launch(Dispatchers.IO) {
@@ -179,6 +184,16 @@ class BackupRestoreSettings : BasePreferenceFragment() {
             true
         }
 
+        val importWatchHistory = findPreference<Preference>("import_watch_history")
+        importWatchHistory?.setOnPreferenceClickListener {
+            val list = importWatchHistoryFormatList.map { getString(it.value) }
+            createImportFormatDialog(R.string.import_watch_history, list) {
+                importFormat = importWatchHistoryFormatList[it]
+                getWatchHistoryFile.launch(arrayOf("*/*"))
+            }
+            true
+        }
+
         childFragmentManager.setFragmentResultListener(
             BACKUP_DIALOG_REQUEST_KEY,
             this

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

@@ -35,6 +35,7 @@
                 tools:srcCompat="@tools:sample/backgrounds/scenic" />
 
             <androidx.cardview.widget.CardView
+                android:id="@+id/thumbnail_duration_card"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="end"

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

@@ -361,6 +361,8 @@
     <string name="all_caught_up_summary">You\'ve seen all new videos</string>
     <string name="import_playlists">Import playlists</string>
     <string name="export_playlists">Export playlists</string>
+    <string name="import_watch_history">Import watch history</string>
+    <string name="import_watch_history_desc">Please note that not everything will be imported due to YouTube\'s limited export data.</string>
     <string name="app_backup">App Backup</string>
     <string name="backup_restore_summary">Import &amp; export subscriptions, playlists, …</string>
     <string name="exportsuccess">Exported.</string>
@@ -474,6 +476,7 @@
     <string name="import_format_newpipe" translatable="false">NewPipe</string>
     <string name="import_format_freetube" translatable="false">FreeTube</string>
     <string name="import_format_youtube_csv" translatable="false">YouTube (CSV)</string>
+    <string name="import_format_youtube_json" translatable="false">YouTube (JSON)</string>
     <string name="home_tab_content">Home tab content</string>
     <string name="show_search_suggestions">Show search suggestions</string>
     <string name="audio_track_format">%1$s - %2$s</string>

app/src/main/res/xml/import_export_settings.xml

@@ -31,6 +31,15 @@
 
     </PreferenceCategory>
 
+    <PreferenceCategory app:title="@string/watch_history">
+
+        <Preference
+            android:icon="@drawable/ic_download_filled"
+            app:key="import_watch_history"
+            app:title="@string/import_watch_history" />
+
+    </PreferenceCategory>
+
     <PreferenceCategory app:title="@string/app_backup">
 
         <Preference