Implement fever favicon (#496)

app/src/main/java/me/ash/reader/domain/service/FeverRssService.kt

@@ -92,10 +92,9 @@ class FeverRssService @Inject constructor(
      * obtained is 0 or their quantity exceeds 250, at which point the pulling process stops.
      *
      * 1. Fetch the Fever groups
-     * 2. Fetch the Fever feeds
+     * 2. Fetch the Fever feeds (including favicons)
      * 3. Fetch the Fever articles
      * 4. Synchronize read/unread and starred/un-starred items
-     * 5. TODO: Fetch the Fever favicons
      */
     override suspend fun sync(coroutineWorker: CoroutineWorker): ListenableWorker.Result = supervisorScope {
         coroutineWorker.setProgress(SyncWorker.setIsSyncing(true))
@@ -127,6 +126,9 @@ class FeverRssService @Inject constructor(
                     }
                 }
             }
+
+            // Fetch the Fever favicons
+            val faviconsById = feverAPI.getFavicons().favicons?.associateBy { it.id } ?: emptyMap()
             feedDao.insertOrUpdate(
                 feedsBody.feeds?.map {
                     Feed(
@@ -135,6 +137,7 @@ class FeverRssService @Inject constructor(
                         url = it.url!!,
                         groupId = accountId.spacerDollar(feedsGroupsMap[it.id.toString()]!!),
                         accountId = accountId,
+                        icon = faviconsById[it.favicon_id]?.data
                     )
                 } ?: emptyList()
             )
@@ -191,7 +194,6 @@ class FeverRssService @Inject constructor(
                 }
             }
 
-            // TODO: 5. Fetch the Fever favicons
 
             Log.i("RLog", "onCompletion: ${System.currentTimeMillis() - preTime}")
             accountDao.update(account.apply {

app/src/main/java/me/ash/reader/infrastructure/rss/provider/fever/FeverDTO.kt

@@ -101,12 +101,12 @@ object FeverDTO {
         val api_version: Int?,
         val auth: Int?,
         val last_refreshed_on_time: Long?,
-        val favicons: Map<String, Favicon>,
+        val favicons: List<Favicon>?,
     )
 
     data class Favicon(
-        val mime_type: String,
-        val data: String,
+        val id: Int,
+        val data: String?,
     )
 
     /**

app/src/main/java/me/ash/reader/ui/component/FeedIcon.kt

@@ -15,6 +15,7 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import me.ash.reader.ui.component.base.Base64Image
 import me.ash.reader.ui.component.base.RYAsyncImage
 
 @Composable
@@ -26,7 +27,7 @@ fun FeedIcon(
     if (iconUrl == null) {
         Box(
             modifier = Modifier
-                .size(20.dp)
+                .size(size)
                 .clip(CircleShape)
                 .background(MaterialTheme.colorScheme.primary),
             contentAlignment = Alignment.Center,
@@ -38,6 +39,14 @@ fun FeedIcon(
                 fontSize = 10.sp,
             )
         }
+    }
+    // e.g. image/gif;base64,R0lGODlh...
+    else if ("^image/.*;base64,.*".toRegex().matches(iconUrl)) {
+        Base64Image(
+            modifier = Modifier
+                .size(size)
+                .clip(CircleShape),
+            base64Uri = iconUrl)
     } else {
         RYAsyncImage(
             modifier = Modifier

app/src/main/java/me/ash/reader/ui/component/base/Base64Image.kt

@@ -0,0 +1,30 @@
+package me.ash.reader.ui.component.base
+
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
+import android.util.Base64
+import androidx.compose.foundation.Image
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.asImageBitmap
+
+@Composable
+fun Base64Image(
+    modifier: Modifier = Modifier,
+    base64Uri: String
+) {
+    val bitmap = base64ToBitmap(base64Uri)
+    val imageBitmap = bitmap.asImageBitmap()
+
+    Image(
+        bitmap = imageBitmap,
+        modifier = modifier,
+        contentDescription = null
+    )
+}
+
+fun base64ToBitmap(base64String: String): Bitmap {
+    val base64Data = base64String.substringAfter("base64,")
+    val imageBytes = Base64.decode(base64Data, Base64.DEFAULT)
+    return BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.size)
+}