1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.calendar.event;
18
19import java.io.Serializable;
20import java.util.ArrayList;
21import java.util.Arrays;
22import java.util.Comparator;
23import java.util.HashMap;
24import java.util.Map;
25
26/**
27 * A cache for event colors and event color keys stored based upon calendar account name and type.
28 */
29public class EventColorCache implements Serializable {
30
31    private static final long serialVersionUID = 2L;
32
33    private static final String SEPARATOR = "::";
34
35    private Map<String, ArrayList<Integer>> mColorPaletteMap;
36    private Map<String, Integer> mColorKeyMap;
37
38    public EventColorCache() {
39        mColorPaletteMap = new HashMap<String, ArrayList<Integer>>();
40        mColorKeyMap = new HashMap<String, Integer>();
41    }
42
43    /**
44     * Inserts a color into the cache.
45     */
46    public void insertColor(String accountName, String accountType, int displayColor,
47            int colorKey) {
48        mColorKeyMap.put(createKey(accountName, accountType, displayColor), colorKey);
49        String key = createKey(accountName, accountType);
50        ArrayList<Integer> colorPalette;
51        if ((colorPalette = mColorPaletteMap.get(key)) == null) {
52            colorPalette = new ArrayList<Integer>();
53        }
54        colorPalette.add(displayColor);
55        mColorPaletteMap.put(key, colorPalette);
56    }
57
58    /**
59     * Retrieve an array of colors for a specific account name and type.
60     */
61    public int[] getColorArray(String accountName, String accountType) {
62        ArrayList<Integer> colors = mColorPaletteMap.get(createKey(accountName, accountType));
63        if (colors == null) {
64            return null;
65        }
66        int[] ret = new int[colors.size()];
67        for (int i = 0; i < ret.length; i++) {
68            ret[i] = colors.get(i);
69        }
70        return ret;
71    }
72
73    /**
74     * Retrieve an event color's unique key based on account name, type, and color.
75     */
76    public int getColorKey(String accountName, String accountType, int displayColor) {
77        return mColorKeyMap.get(createKey(accountName, accountType, displayColor));
78    }
79
80    /**
81     * Sorts the arrays of colors based on a comparator.
82     */
83    public void sortPalettes(Comparator<Integer> comparator) {
84        for (String key : mColorPaletteMap.keySet()) {
85            ArrayList<Integer> palette = mColorPaletteMap.get(key);
86            Integer[] sortedColors = new Integer[palette.size()];
87            Arrays.sort(palette.toArray(sortedColors), comparator);
88            palette.clear();
89            for (Integer color : sortedColors) {
90                palette.add(color);
91            }
92            mColorPaletteMap.put(key, palette);
93        }
94    }
95
96    private String createKey(String accountName, String accountType) {
97        return new StringBuilder().append(accountName)
98                .append(SEPARATOR)
99                .append(accountType)
100                .toString();
101    }
102
103    private String createKey(String accountName, String accountType, int displayColor) {
104        return new StringBuilder(createKey(accountName, accountType))
105            .append(SEPARATOR)
106            .append(displayColor)
107            .toString();
108    }
109}
110