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 */
16
17package com.android.messaging.datamodel.data;
18
19import android.database.Cursor;
20import android.support.v4.util.SimpleArrayMap;
21
22import com.android.messaging.util.Assert;
23
24import com.google.common.annotations.VisibleForTesting;
25
26import java.util.ArrayList;
27import java.util.Iterator;
28import java.util.NoSuchElementException;
29
30/**
31 * A class that contains the list of all participants potentially involved in a conversation.
32 * Includes both the participant records for each participant referenced in conversation
33 * participants table (i.e. "other" phone numbers) plus all participants representing self
34 * (i.e. one per sim recorded in the subscription manager db).
35 */
36public class ConversationParticipantsData implements Iterable<ParticipantData> {
37    // A map from a participant id to a participant
38    private final SimpleArrayMap<String, ParticipantData> mConversationParticipantsMap;
39    private int mParticipantCountExcludingSelf = 0;
40
41    public ConversationParticipantsData() {
42        mConversationParticipantsMap = new SimpleArrayMap<String, ParticipantData>();
43    }
44
45    public void bind(final Cursor cursor) {
46        mConversationParticipantsMap.clear();
47        mParticipantCountExcludingSelf = 0;
48        if (cursor != null) {
49            while (cursor.moveToNext()) {
50                final ParticipantData newParticipant = ParticipantData.getFromCursor(cursor);
51                if (!newParticipant.isSelf()) {
52                    mParticipantCountExcludingSelf++;
53                }
54                mConversationParticipantsMap.put(newParticipant.getId(), newParticipant);
55            }
56        }
57    }
58
59    @VisibleForTesting
60    ParticipantData getParticipantById(final String participantId) {
61        return mConversationParticipantsMap.get(participantId);
62    }
63
64    ArrayList<ParticipantData> getParticipantListExcludingSelf() {
65        final ArrayList<ParticipantData> retList =
66                new ArrayList<ParticipantData>(mConversationParticipantsMap.size());
67        for (int i = 0; i < mConversationParticipantsMap.size(); i++) {
68            final ParticipantData participant = mConversationParticipantsMap.valueAt(i);
69            if (!participant.isSelf()) {
70                retList.add(participant);
71            }
72        }
73        return retList;
74    }
75
76    /**
77     * For a 1:1 conversation return the other (not self) participant
78     */
79    public ParticipantData getOtherParticipant() {
80        if (mParticipantCountExcludingSelf == 1) {
81            for (int i = 0; i < mConversationParticipantsMap.size(); i++) {
82                final ParticipantData participant = mConversationParticipantsMap.valueAt(i);
83                if (!participant.isSelf()) {
84                    return participant;
85                }
86            }
87            Assert.fail("Could not find other participant");
88        }
89        return null;
90    }
91
92    public int getNumberOfParticipantsExcludingSelf() {
93        return mParticipantCountExcludingSelf;
94    }
95
96    public boolean isLoaded() {
97        return !mConversationParticipantsMap.isEmpty();
98    }
99
100    @Override
101    public Iterator<ParticipantData> iterator() {
102        return new Iterator<ParticipantData>() {
103            private int mCurrentIndex = -1;
104
105            @Override
106            public boolean hasNext() {
107                return mCurrentIndex < mConversationParticipantsMap.size() - 1;
108            }
109
110            @Override
111            public ParticipantData next() {
112                mCurrentIndex++;
113                if (mCurrentIndex >= mConversationParticipantsMap.size()) {
114                    throw new NoSuchElementException();
115                }
116                return mConversationParticipantsMap.valueAt(mCurrentIndex);
117            }
118
119            @Override
120            public void remove() {
121                throw new UnsupportedOperationException();
122            }
123        };
124    }
125}
126