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mastodon-app-ufficiale-android
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rudimentary pagination fix to keep emoji size under 1MB cursor limit

This commit is contained in:
likeazir 2024-11-11 17:05:12 +01:00
parent 20ed47032e
commit 5c75ada632
1 changed files with 20 additions and 2 deletions
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22
mastodon/src/main/java/org/joinmastodon/android/api/session/AccountSessionManager.java
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@ -382,7 +382,7 @@ public class AccountSessionManager{
}
private void readInstanceInfo(SQLiteDatabase db, Set<String> domains){
try(Cursor cursor=db.query("instances", null, "`domain` IN ("+String.join(", ", Collections.nCopies(domains.size(), "?"))+")", domains.toArray(new String[0]), null, null, null)){
try(Cursor cursor=db.query("instances", new String[]{"domain", "instance_obj", "last_updated", "version"}, "`domain` IN ("+String.join(", ", Collections.nCopies(domains.size(), "?"))+")", domains.toArray(new String[0]), null, null, null)){
ContentValues values=new ContentValues();
while(cursor.moveToNext()){
DatabaseUtils.cursorRowToContentValues(cursor, values);
@ -393,11 +393,28 @@ public class AccountSessionManager{
case 2 -> InstanceV2.class;
default -> throw new IllegalStateException("Unexpected value: " + version);
});
List<Emoji> emojis=MastodonAPIController.gson.fromJson(values.getAsString("emojis"), new TypeToken<List<Emoji>>(){}.getType());
//poor man's pagination / terrible performance
StringBuilder emojiString = new StringBuilder();
try(Cursor emojiCountCursor=db.rawQuery("select length(emojis) from instances where `domain` = ?", new String[]{domain})){
emojiCountCursor.moveToNext();
int totalEmostringLen = emojiCountCursor.getInt(0);
//max cursor size is 1MB, stay at 0.8MB to prevent crash
int pagesize = 800000;
for (int i = 0; i < (totalEmostringLen / 800000) + 1; i++){
try(Cursor emojiCursor=db.rawQuery("select substr(emojis,?, ?) from instances where `domain` = ?", new String[]{String.valueOf(i * pagesize), String.valueOf(pagesize),domain})){
emojiCursor.moveToNext();
emojiString.append(emojiCursor.getString(0));
}
}
}
List<Emoji> emojis=MastodonAPIController.gson.fromJson(emojiString.toString(), new TypeToken<List<Emoji>>(){}.getType());
instances.put(domain, instance);
customEmojis.put(domain, groupCustomEmojis(emojis));
instancesLastUpdated.put(domain, values.getAsLong("last_updated"));
}
} catch(Exception ex) {
Log.d(TAG, "readInstanceInfo failed", ex);
return;
}
if(!loadedInstances){
loadedInstances=true;
@ -639,6 +656,7 @@ public class AccountSessionManager{
}
private static class DatabaseHelper extends SQLiteOpenHelper{
public DatabaseHelper(){
super(MastodonApp.context, "accounts.db", null, DB_VERSION);
}