Observe tracker login state instead of fetching once (#987)

* Observe tracker login state instead of fetching once

* Review changes

app/src/main/java/eu/kanade/tachiyomi/data/track/BaseTracker.kt

@@ -8,6 +8,8 @@ import eu.kanade.domain.track.service.TrackPreferences
 import eu.kanade.tachiyomi.data.database.models.Track
 import eu.kanade.tachiyomi.network.NetworkHelper
 import eu.kanade.tachiyomi.util.system.toast
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.combine
 import logcat.LogPriority
 import okhttp3.OkHttpClient
 import tachiyomi.core.common.util.lang.withIOContext
@@ -53,6 +55,15 @@ abstract class BaseTracker(
         get() = getUsername().isNotEmpty() &&
             getPassword().isNotEmpty()
 
+    override val isLoggedInFlow: Flow<Boolean> by lazy {
+        combine(
+            trackPreferences.trackUsername(this).changes(),
+            trackPreferences.trackPassword(this).changes(),
+        ) { username, password ->
+            username.isNotEmpty() && password.isNotEmpty()
+        }
+    }
+
     override fun getUsername() = trackPreferences.trackUsername(this).get()
 
     override fun getPassword() = trackPreferences.trackPassword(this).get()

app/src/main/java/eu/kanade/tachiyomi/data/track/Tracker.kt

@@ -7,6 +7,7 @@ import dev.icerock.moko.resources.StringResource
 import eu.kanade.tachiyomi.data.database.models.Track
 import eu.kanade.tachiyomi.data.track.model.TrackSearch
 import kotlinx.collections.immutable.ImmutableList
+import kotlinx.coroutines.flow.Flow
 import okhttp3.OkHttpClient
 import tachiyomi.domain.track.model.Track as DomainTrack
 
@@ -61,6 +62,8 @@ interface Tracker {
 
     val isLoggedIn: Boolean
 
+    val isLoggedInFlow: Flow<Boolean>
+
     fun getUsername(): String
 
     fun getPassword(): String

app/src/main/java/eu/kanade/tachiyomi/data/track/TrackerManager.kt

@@ -9,6 +9,7 @@ import eu.kanade.tachiyomi.data.track.mangaupdates.MangaUpdates
 import eu.kanade.tachiyomi.data.track.myanimelist.MyAnimeList
 import eu.kanade.tachiyomi.data.track.shikimori.Shikimori
 import eu.kanade.tachiyomi.data.track.suwayomi.Suwayomi
+import kotlinx.coroutines.flow.combine
 
 class TrackerManager {
 
@@ -32,5 +33,13 @@ class TrackerManager {
 
     fun loggedInTrackers() = trackers.filter { it.isLoggedIn }
 
+    fun loggedInTrackersFlow() = combine(trackers.map { it.isLoggedInFlow }) {
+        it.mapIndexedNotNull { index, isLoggedIn ->
+            if (isLoggedIn) trackers[index] else null
+        }
+    }
+
     fun get(id: Long) = trackers.find { it.id == id }
+
+    fun getAll(ids: Set<Long>) = trackers.filter { it.id in ids }
 }