chatsessionadapter.java

Android平台上即时通讯聊天工具源代码。 支持手机聊天。

/*
 * Copyright (C) 2007-2008 Esmertec AG.
 * Copyright (C) 2007-2008 The Android Open Source Project
 *
 * 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 com.android.im.service;

import com.android.im.IChatListener;
import com.android.im.IChatSession;
import com.android.im.engine.ChatGroup;
import com.android.im.engine.ChatGroupManager;
import com.android.im.engine.ChatSession;
import com.android.im.engine.Contact;
import com.android.im.engine.GroupListener;
import com.android.im.engine.GroupMemberListener;
import com.android.im.engine.ImConnection;
import com.android.im.engine.ImEntity;
import com.android.im.engine.ImErrorInfo;
import com.android.im.engine.Message;
import com.android.im.engine.MessageListener;
import com.android.im.engine.Presence;

import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.ContentUris;
import android.database.Cursor;
import android.net.Uri;
import android.os.RemoteException;
import android.provider.BaseColumns;
import android.provider.Im;
import android.util.Log;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

public class ChatSessionAdapter extends IChatSession.Stub {

    private static final String NON_CHAT_MESSAGE_SELECTION = Im.BaseMessageColumns.TYPE
            + "!=" + Im.MessageType.INCOMING + " AND " + Im.BaseMessageColumns.TYPE
            + "!=" + Im.MessageType.OUTGOING;

    static final String TAG = RemoteImService.TAG;

    ImConnectionAdapter mConnection;
    ChatSessionManagerAdapter mChatManager;
    ChatSession mAdaptee;
    ListenerAdapter mListenerAdapter;
    boolean mIsGroupChat;
    StatusBarNotifier mStatusBarNotifier;

    private ContentResolver mContentResolver;
    /*package*/Uri mChatURI;
    private Uri mMessageURI;

    private boolean mConvertingToGroupChat;

    private static final int MAX_HISTORY_COPY_COUNT = 10;

    private HashMap<String, Integer> mContactStatusMap = new HashMap<String, Integer>();

    public ChatSessionAdapter(ChatSession adaptee,
            ImConnectionAdapter connection) {
        mAdaptee = adaptee;
        mConnection = connection;
        RemoteImService service = connection.getContext();
        mContentResolver = service.getContentResolver();
        mStatusBarNotifier = service.getStatusBarNotifier();
        mChatManager = (ChatSessionManagerAdapter) connection.getChatSessionManager();

        mListenerAdapter = new ListenerAdapter();
        mAdaptee.addMessageListener(mListenerAdapter);

        ImEntity participant = mAdaptee.getParticipant();

        if(participant instanceof ChatGroup) {
            init((ChatGroup)participant);
        } else {
            init((Contact)participant);
        }
    }

    private void init(ChatGroup group) {
        mIsGroupChat = true;
        long groupId = insertGroupContactInDb(group);
        group.addMemberListener(mListenerAdapter);
        mMessageURI = ContentUris.withAppendedId(
                Im.GroupMessages.CONTENT_URI_GROUP_MESSAGES_BY, groupId);
        mChatURI = ContentUris.withAppendedId(Im.Chats.CONTENT_URI, groupId);
        insertOrUpdateChat(null);

        for (Contact c : group.getMembers()) {
            mContactStatusMap.put(c.getName(), c.getPresence().getStatus());
        }
    }

    private void init(Contact contact) {
        mIsGroupChat = false;
        ContactListManagerAdapter listManager =
            (ContactListManagerAdapter) mConnection.getContactListManager();
        long contactId = listManager.queryOrInsertContact(contact);

        long provider = mConnection.getProviderId();
        long account  = mConnection.getAccountId();
        String address = contact.getAddress().getFullName();
        mMessageURI = Im.Messages.getContentUriByContact(provider, account, address);
        mChatURI = ContentUris.withAppendedId(Im.Chats.CONTENT_URI, contactId);
        insertOrUpdateChat(null);

        mContactStatusMap.put(contact.getName(), contact.getPresence().getStatus());
    }

    private ChatGroupManager getGroupManager() {
        return mConnection.getAdaptee().getChatGroupManager();
    }

    public ChatSession getAdaptee() {
        return mAdaptee;
    }

    public Uri getChatUri() {
        return mChatURI;
    }

    public String[] getPariticipants() {
        if (mIsGroupChat) {
            Contact self = mConnection.getLoginUser();
            ChatGroup group = (ChatGroup)mAdaptee.getParticipant();
            List<Contact> members = group.getMembers();
            String[] result = new String[members.size() - 1];
            int index = 0;
            for (Contact c : members) {
                if (!c.equals(self)) {
                    result[index++] = c.getAddress().getFullName();
                }
            }
            return result;
        } else {
            return new String[] {mAdaptee.getParticipant().getAddress().getFullName()};
        }
    }

    /**
     * Convert this chat session to a group chat. If it's already a group chat,
     * nothing will happen. The method works in async mode and the registered
     * listener will be notified when it's converted to group chat successfully.
     *
     * Note that the method is not thread-safe since it's always called from
     * the UI and Android uses single thread mode for UI.
     */
    public void convertToGroupChat() {
        if (mIsGroupChat || mConvertingToGroupChat) {
            return;
        }

        mConvertingToGroupChat = true;
        new ChatConvertor().convertToGroupChat();
    }

    public boolean isGroupChatSession() {
        return mIsGroupChat;
    }

    public String getName() {
        return mAdaptee.getParticipant().getAddress().getScreenName();
    }

    public String getAddress() {
        return mAdaptee.getParticipant().getAddress().getFullName();
    }

    public long getId() {
        return ContentUris.parseId(mChatURI);
    }

    public void inviteContact(String contact) {
        if(!mIsGroupChat){
            return;
        }
        ContactListManagerAdapter listManager =
            (ContactListManagerAdapter) mConnection.getContactListManager();
        Contact invitee = listManager.getContactByAddress(contact);
        if(invitee == null) {
            ImErrorInfo error = new ImErrorInfo(ImErrorInfo.ILLEGAL_CONTACT_ADDRESS,
                "Cannot find contact with address: " + contact);
            mListenerAdapter.onError((ChatGroup)mAdaptee.getParticipant(), error);
        } else {
            getGroupManager().inviteUserAsync((ChatGroup)mAdaptee.getParticipant(),
                    invitee);
        }
    }

    public void leave() {
        if (mIsGroupChat) {
            getGroupManager().leaveChatGroupAsync((ChatGroup)mAdaptee.getParticipant());
            mContentResolver.delete(mMessageURI, null, null);
        } else {
            mContentResolver.delete(mMessageURI, NON_CHAT_MESSAGE_SELECTION, null);
        }
        mContentResolver.delete(mChatURI, null, null);
        mStatusBarNotifier.dismissChatNotification(
                mConnection.getProviderId(), getAddress());
        mChatManager.closeChatSession(this);
    }

    public void sendMessage(String text) {
        if (mConnection.getState() == ImConnection.SUSPENDED) {
            // connection has been suspended, save the message without send it
            insertMessageInDb(null, text, -1, Im.MessageType.POSTPONED);
            return;
        }

        Message msg = new Message(text);
        mAdaptee.sendMessageAsync(msg);
        long now = System.currentTimeMillis();
        insertMessageInDb(null, text, now, Im.MessageType.OUTGOING);
    }

    void sendPostponedMessages() {
        String[] projection = new String[] {
            BaseColumns._ID,
            Im.BaseMessageColumns.BODY,
            Im.BaseMessageColumns.DATE,
            Im.BaseMessageColumns.TYPE,
        };
        String selection = Im.BaseMessageColumns.TYPE + "=?";

        Cursor c = mContentResolver.query(mMessageURI, projection, selection,
                new String[]{Integer.toString(Im.MessageType.POSTPONED)}, null);
        if (c == null) {
            Log.e(TAG, "Query error while querying postponed messages");
            return;
        }

        while (c.moveToNext()) {
            String body = c.getString(1);
            mAdaptee.sendMessageAsync(new Message(body));

            c.updateLong(2, System.currentTimeMillis());
            c.updateInt(3, Im.MessageType.OUTGOING);
        }
        c.commitUpdates();
        c.close();
    }

    public void registerChatListener(IChatListener listener) {
        if (listener != null) {
            mListenerAdapter.addRemoteListener(listener);
        }
    }

    public void unregisterChatListener(IChatListener listener) {
        mListenerAdapter.removeRemoteListener(listener);
    }

    String getNickName(String username) {
        ImEntity participant = mAdaptee.getParticipant();
        if (mIsGroupChat) {
            ChatGroup group = (ChatGroup)participant;
            List<Contact> members = group.getMembers();
            for (Contact c : members) {
                if (username.equals(c.getAddress().getFullName())) {
                    return c.getName();
                }
            }
            // not found, impossible
            return username;
        } else {
            return ((Contact)participant).getName();
        }
    }

    void onConvertToGroupChatSuccess(ChatGroup group) {
        Contact oldParticipant = (Contact)mAdaptee.getParticipant();
        String oldAddress = getAddress();
        mAdaptee.setParticipant(group);
        mChatManager.updateChatSession(oldAddress, this);