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RecentEmojiPageModel.java
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RecentEmojiPageModel.java
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package org.thoughtcrime.securesms.components.emoji;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.preference.PreferenceManager;
import androidx.annotation.NonNull;
import com.annimon.stream.Stream;
import com.fasterxml.jackson.databind.type.CollectionType;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.thoughtcrime.securesms.R;
import org.thoughtcrime.securesms.logging.Log;
import org.thoughtcrime.securesms.util.JsonUtils;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
public class RecentEmojiPageModel implements EmojiPageModel {
private static final String TAG = RecentEmojiPageModel.class.getSimpleName();
private static final int EMOJI_LRU_SIZE = 50;
private final SharedPreferences prefs;
private final String preferenceName;
private final LinkedHashSet<String> recentlyUsed;
public RecentEmojiPageModel(Context context, @NonNull String preferenceName) {
this.prefs = PreferenceManager.getDefaultSharedPreferences(context);
this.preferenceName = preferenceName;
this.recentlyUsed = getPersistedCache();
}
private LinkedHashSet<String> getPersistedCache() {
String serialized = prefs.getString(preferenceName, "[]");
try {
CollectionType collectionType = TypeFactory.defaultInstance()
.constructCollectionType(LinkedHashSet.class, String.class);
return JsonUtils.getMapper().readValue(serialized, collectionType);
} catch (IOException e) {
Log.w(TAG, e);
return new LinkedHashSet<>();
}
}
@Override public int getIconAttr() {
return R.attr.emoji_category_recent;
}
@Override public List<String> getEmoji() {
List<String> emoji = new ArrayList<>(recentlyUsed);
Collections.reverse(emoji);
return emoji;
}
@Override public List<Emoji> getDisplayEmoji() {
return Stream.of(getEmoji()).map(Emoji::new).toList();
}
@Override public boolean hasSpriteMap() {
return false;
}
@Override public String getSprite() {
return null;
}
@Override public boolean isDynamic() {
return true;
}
public void onCodePointSelected(String emoji) {
recentlyUsed.remove(emoji);
recentlyUsed.add(emoji);
if (recentlyUsed.size() > EMOJI_LRU_SIZE) {
Iterator<String> iterator = recentlyUsed.iterator();
iterator.next();
iterator.remove();
}
final LinkedHashSet<String> latestRecentlyUsed = new LinkedHashSet<>(recentlyUsed);
new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... params) {
try {
String serialized = JsonUtils.toJson(latestRecentlyUsed);
prefs.edit()
.putString(preferenceName, serialized)
.apply();
} catch (IOException e) {
Log.w(TAG, e);
}
return null;
}
}.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
}
private String[] toReversePrimitiveArray(@NonNull LinkedHashSet<String> emojiSet) {
String[] emojis = new String[emojiSet.size()];
int i = emojiSet.size() - 1;
for (String emoji : emojiSet) {
emojis[i--] = emoji;
}
return emojis;
}
}