feat: add cross device sync

app/build.gradle.kts

@@ -254,6 +254,9 @@ dependencies {
     // For detecting memory leaks; see https://square.github.io/leakcanary/
     // debugImplementation(libs.leakcanary.android)
     implementation(libs.leakcanary.plumber)
+
+    implementation(libs.google.api.services.drive)
+    implementation(libs.google.api.client.oauth)
 }
 
 androidComponents {

app/proguard-rules.pro

@@ -75,3 +75,9 @@
 # Firebase
 -keep class com.google.firebase.installations.** { *; }
 -keep interface com.google.firebase.installations.** { *; }
+
+# Google Drive
+-keep class com.google.api.services.** { *; }
+
+# Google OAuth
+-keep class com.google.api.client.** { *; }

app/src/main/AndroidManifest.xml

@@ -187,6 +187,20 @@
                 <data android:host="shikimori-auth" />
             </intent-filter>
         </activity>
+        <activity
+            android:name=".ui.setting.track.GoogleDriveLoginActivity"
+            android:label="GoogleDrive"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data
+                    android:scheme="eu.kanade.google.oauth" />
+            </intent-filter>
+        </activity>
 
         <receiver
             android:name=".data.notification.NotificationReceiver"

app/src/main/assets/client_secrets.json

@@ -0,0 +1 @@
+{"installed":{"client_id":"1046609911130-tbp79niehhuii976ekep1us06e9a8lne.apps.googleusercontent.com","project_id":"tachiyomi","auth_uri":"https://accounts.google.com/o/oauth2/auth","token_uri":"https://oauth2.googleapis.com/token","auth_provider_x509_cert_url":"https://www.googleapis.com/oauth2/v1/certs"}}

app/src/main/java/eu/kanade/domain/chapter/model/Chapter.kt

@@ -39,4 +39,5 @@ fun Chapter.toDbChapter(): DbChapter = ChapterImpl().also {
     it.date_upload = dateUpload
     it.chapter_number = chapterNumber.toFloat()
     it.source_order = sourceOrder.toInt()
+    it.last_modified = lastModifiedAt
 }

app/src/main/java/eu/kanade/presentation/library/components/LibraryToolbar.kt

@@ -37,6 +37,7 @@ fun LibraryToolbar(
     onClickRefresh: () -> Unit,
     onClickGlobalUpdate: () -> Unit,
     onClickOpenRandomManga: () -> Unit,
+    onClickSyncNow: () -> Unit,
     searchQuery: String?,
     onSearchQueryChange: (String?) -> Unit,
     scrollBehavior: TopAppBarScrollBehavior?,
@@ -56,6 +57,7 @@ fun LibraryToolbar(
         onClickRefresh = onClickRefresh,
         onClickGlobalUpdate = onClickGlobalUpdate,
         onClickOpenRandomManga = onClickOpenRandomManga,
+        onClickSyncNow = onClickSyncNow,
         scrollBehavior = scrollBehavior,
     )
 }
@@ -70,6 +72,7 @@ private fun LibraryRegularToolbar(
     onClickRefresh: () -> Unit,
     onClickGlobalUpdate: () -> Unit,
     onClickOpenRandomManga: () -> Unit,
+    onClickSyncNow: () -> Unit,
     scrollBehavior: TopAppBarScrollBehavior?,
 ) {
     val pillAlpha = if (isSystemInDarkTheme()) 0.12f else 0.08f
@@ -115,6 +118,10 @@ private fun LibraryRegularToolbar(
                         title = stringResource(MR.strings.action_open_random_manga),
                         onClick = onClickOpenRandomManga,
                     ),
+                    AppBar.OverflowAction(
+                        title = stringResource(MR.strings.sync_library),
+                        onClick = onClickSyncNow,
+                    ),
                 ),
             )
         },

app/src/main/java/eu/kanade/presentation/more/settings/screen/SettingsAdvancedScreen.kt

@@ -61,6 +61,7 @@ import tachiyomi.core.util.lang.launchNonCancellable
 import tachiyomi.core.util.lang.withUIContext
 import tachiyomi.core.util.system.logcat
 import tachiyomi.domain.manga.interactor.ResetViewerFlags
+import tachiyomi.domain.sync.SyncPreferences
 import tachiyomi.i18n.MR
 import tachiyomi.presentation.core.i18n.stringResource
 import tachiyomi.presentation.core.util.collectAsState
@@ -124,6 +125,7 @@ object SettingsAdvancedScreen : SearchableSettings {
             getNetworkGroup(networkPreferences = networkPreferences),
             getLibraryGroup(),
             getExtensionsGroup(basePreferences = basePreferences),
+            getSyncGroup(),
         )
     }
 
@@ -384,4 +386,23 @@ object SettingsAdvancedScreen : SearchableSettings {
             ),
         )
     }
+
+    @Composable
+    private fun getSyncGroup(): Preference.PreferenceGroup {
+        val context = LocalContext.current
+        val syncPreferences = remember { Injekt.get<SyncPreferences>() }
+        return Preference.PreferenceGroup(
+            title = stringResource(MR.strings.label_sync),
+            preferenceItems = persistentListOf(
+                Preference.PreferenceItem.TextPreference(
+                    title = stringResource(MR.strings.pref_reset_sync_timestamp),
+                    subtitle = stringResource(MR.strings.pref_reset_sync_timestamp_subtitle),
+                    onClick = {
+                        syncPreferences.lastSyncTimestamp().set(0)
+                        context.toast(MR.strings.success_reset_sync_timestamp)
+                    },
+                ),
+            ),
+        )
+    }
 }