1/*
2 * Copyright (C) 2015 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 */
16package com.android.car.dialer.telecom;
17
18import android.support.v4.util.Pair;
19import android.util.SparseArray;
20
21import java.util.ArrayList;
22import java.util.HashMap;
23import java.util.List;
24import java.util.Map;
25
26/**
27 * Holds a list of {@link UiCall} and implements convenient mapping from underlying
28 * {@code Call} class to {@link UiCall}.
29 */
30public abstract class UiCallList<C> {
31    private Map<C, UiCall> mCallToCallInfoMap = new HashMap<>();
32    private SparseArray<Pair<UiCall, C>> mIdToCallMap = new SparseArray<>();
33
34    /**
35     * Creates or gets existing {@code CallInfo} instance for a given key
36     */
37    public UiCall getOrCreate(C call) {
38        if (call == null) {
39            return null;
40        }
41        UiCall uiCall = mCallToCallInfoMap.get(call);
42        if (uiCall == null) {
43            uiCall = createUiCall(call);
44            mCallToCallInfoMap.put(call, uiCall);
45            mIdToCallMap.append(uiCall.getId(), new Pair<>(uiCall, call));
46        }
47        return uiCall;
48    }
49
50    /**
51     * Returns a list of existing {@code CallInfo}.
52     */
53    public List<UiCall> getCalls() {
54        return new ArrayList<>(mCallToCallInfoMap.values());
55    }
56
57    /**
58     * Clears a list.
59     */
60    public void clearCalls() {
61        mCallToCallInfoMap.clear();
62        mIdToCallMap.clear();
63    }
64
65    /**
66     * Removes {@code CallInfo} by given key.
67     */
68    public void remove(UiCall uiCall) {
69        int callId = uiCall.getId();
70        C call = getCall(callId);
71        if (mCallToCallInfoMap.containsKey(call)) {
72            mCallToCallInfoMap.remove(call);
73        }
74        mIdToCallMap.remove(callId);
75    }
76
77    protected C getCall(int callId) {
78        return mIdToCallMap.get(callId).second;
79    }
80
81    public UiCall getUiCall(int callId) {
82        return mIdToCallMap.get(callId).first;
83    }
84
85    abstract protected UiCall createUiCall(C call);
86}
87