1 files changed, 128 insertions, 0 deletions
diff --git a/src/github/ankushsachdeva/emojicon/EmojiconRecentsManager.java b/src/github/ankushsachdeva/emojicon/EmojiconRecentsManager.java
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@@ -0,0 +1,128 @@
+/*
+ * Copyright 2014 Ankush Sachdeva
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package github.ankushsachdeva.emojicon;
+
+import github.ankushsachdeva.emojicon.emoji.Emojicon;
+
+import java.util.ArrayList;
+import java.util.StringTokenizer;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+
+
+/**
+* @author Daniele Ricci
+*/
+public class EmojiconRecentsManager extends ArrayList<Emojicon> {
+
+    private static final String PREFERENCE_NAME = "emojicon";
+    private static final String PREF_RECENTS = "recent_emojis";
+    private static final String PREF_PAGE = "recent_page";
+
+    private static final Object LOCK = new Object();
+    private static EmojiconRecentsManager sInstance;
+
+    private Context mContext;
+
+    private EmojiconRecentsManager(Context context) {
+        mContext = context.getApplicationContext();
+        loadRecents();
+    }
+
+    public static EmojiconRecentsManager getInstance(Context context) {
+        if (sInstance == null) {
+            synchronized (LOCK) {
+                if (sInstance == null) {
+                    sInstance = new EmojiconRecentsManager(context);
+                }
+            }
+        }
+        return sInstance;
+    }
+
+    public int getRecentPage() {
+        return getPreferences().getInt(PREF_PAGE, 0);
+    }
+
+    public void setRecentPage(int page) {
+        getPreferences().edit().putInt(PREF_PAGE, page).commit();
+    }
+
+    public void push(Emojicon object) {
+        // FIXME totally inefficient way of adding the emoji to the adapter
+        // TODO this should be probably replaced by a deque
+        if (contains(object)) {
+            super.remove(object);
+        }
+        add(0, object);
+    }
+
+    @Override
+    public boolean add(Emojicon object) {
+        boolean ret = super.add(object);
+        saveRecents();
+        return ret;
+    }
+
+    @Override
+    public void add(int index, Emojicon object) {
+        super.add(index, object);
+        saveRecents();
+    }
+
+    @Override
+    public boolean remove(Object object) {
+        boolean ret = super.remove(object);
+        saveRecents();
+        return ret;
+    }
+
+    private SharedPreferences getPreferences() {
+        return mContext.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
+    }
+
+    private void loadRecents() {
+        SharedPreferences prefs = getPreferences();
+        String str = prefs.getString(PREF_RECENTS, "");
+        StringTokenizer tokenizer = new StringTokenizer(str, "~");
+        while (tokenizer.hasMoreTokens()) {
+            try {
+                int codepoint = Integer.parseInt(tokenizer.nextToken());
+                add(Emojicon.fromCodePoint(codepoint));
+            }
+            catch (NumberFormatException e) {
+                // ignored
+            }
+        }
+    }
+
+    private void saveRecents() {
+        StringBuilder str = new StringBuilder();
+        int c = size();
+        for (int i = 0; i < c; i++) {
+            Emojicon e = get(i);
+            str.append(e.getEmoji().codePointAt(0));
+            if (i < (c - 1)) {
+                str.append('~');
+            }
+        }
+        SharedPreferences prefs = getPreferences();
+        prefs.edit().putString(PREF_RECENTS, str.toString()).commit();
+    }
+
+}