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/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.inputmethod.latin;
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import android.content.Context;
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import android.os.DropBoxManager;
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import android.text.format.DateUtils;
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import android.util.Log;
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import java.util.ArrayList;
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public class LatinImeLogger {
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private static final String TAG = "LatinIMELogs";
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private static final boolean DBG = false;
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// Volatile is needed for multi-cpu platform.
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private static volatile LatinImeLogger sLatinImeLogger;
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private static final long MINIMUMINTERVAL = 20 * DateUtils.SECOND_IN_MILLIS; // 20 sec
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private static final char SEPARATER = ';';
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private static final int ID_CLICKSUGGESTION = 0;
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private static final int ID_AUTOSUGGESTION = 1;
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private static final int ID_AUTOSUGGESTIONCANCELED = 2;
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private static final int ID_INPUT = 3;
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private static final int ID_DELETE = 4;
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private ArrayList<LogEntry> mLogBuffer;
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private final Context mContext;
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private final DropBoxManager mDropBox;
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private long mLastTimeActive;
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private long mLastTimeSend;
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private int mDeleteCount;
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private int mInputCount;
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private static class LogEntry {
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public final int mTag;
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public final long mTime;
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public final String mData;
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public LogEntry (long time, int tag, String data) {
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mTag = tag;
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mTime = time;
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mData = data;
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}
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}
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/**
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* Returns the singleton of the logger.
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* @param context
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*/
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public static LatinImeLogger getLogger(Context context) {
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if (sLatinImeLogger == null) {
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synchronized (LatinImeLogger.class) {
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if (sLatinImeLogger == null) {
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sLatinImeLogger =new LatinImeLogger(context);
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}
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}
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}
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return sLatinImeLogger;
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}
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private LatinImeLogger(Context context) {
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mContext = context;
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mDropBox = (DropBoxManager) mContext.getSystemService(Context.DROPBOX_SERVICE);
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mLastTimeSend = System.currentTimeMillis();
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mLastTimeActive = mLastTimeSend;
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mDeleteCount = 0;
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mInputCount = 0;
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}
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/**
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* Clear all logged data
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*/
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private void reset() {
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mDeleteCount = 0;
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mInputCount = 0;
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mLogBuffer.clear();
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}
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/**
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* Check if the input string is safe as an entry or not.
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*/
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private boolean checkStringDataSafe(String s) {
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for (int i = 0; i < s.length(); ++i) {
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if (!Character.isDigit(s.charAt(i))) {
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return true;
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}
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}
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return false;
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}
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/**
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* Add an entry
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* @param tag
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* @param data
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*/
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private void addData(int tag, Object data) {
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switch (tag) {
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case ID_DELETE:
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mDeleteCount += (Integer)data;
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break;
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case ID_INPUT:
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mInputCount += (Integer)data;
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break;
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default:
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if (data instanceof String) {
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String dataString = (String) data;
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if (checkStringDataSafe(dataString)) {
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mLogBuffer.add(new LogEntry (System.currentTimeMillis(), tag, dataString));
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} else {
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if (DBG) {
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Log.d(TAG, "Skipped to add an entry because data is unsafe.");
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}
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}
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} else {
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if (DBG) {
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Log.e(TAG, "Log is invalid.");
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}
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}
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break;
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}
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}
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private static void appendWithLength(StringBuffer sb, String data) {
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sb.append(data.length());
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sb.append(SEPARATER);
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sb.append(data);
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}
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private static void appendLogEntry(StringBuffer sb, String time, String tag, String data) {
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appendWithLength(sb, time);
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appendWithLength(sb, tag);
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appendWithLength(sb, data);
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}
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private String createStringFromEntries(ArrayList<LogEntry> logs) {
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StringBuffer sb = new StringBuffer();
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String nowString = String.valueOf(System.currentTimeMillis());
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appendLogEntry(sb, nowString, String.valueOf(ID_DELETE), String.valueOf(mDeleteCount));
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appendLogEntry(sb, nowString, String.valueOf(ID_INPUT), String.valueOf(mInputCount));
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for (LogEntry log: logs) {
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appendLogEntry(sb, String.valueOf(log.mTime), String.valueOf(log.mTag), log.mData);
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}
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return sb.toString();
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}
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private void commit() {
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mDropBox.addText(TAG, createStringFromEntries(mLogBuffer));
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reset();
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mLastTimeSend = System.currentTimeMillis();
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}
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private void sendLogToDropBox(int tag, Object s) {
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long now = System.currentTimeMillis();
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if (now - mLastTimeActive > MINIMUMINTERVAL) {
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// Send a log before adding an log entry if the last data is too old.
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commit();
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addData(tag, s);
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} else if (now - mLastTimeSend > MINIMUMINTERVAL) {
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// Send a log after adding an log entry.
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addData(tag, s);
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commit();
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} else {
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addData(tag, s);
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}
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mLastTimeActive = now;
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}
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public void logOnClickSuggestion(String s) {
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sendLogToDropBox(ID_CLICKSUGGESTION, s);
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}
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public void logOnAutoSuggestion(String s) {
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sendLogToDropBox(ID_AUTOSUGGESTION, s);
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}
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public void logOnAutoSuggestionCanceled(String s) {
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sendLogToDropBox(ID_AUTOSUGGESTIONCANCELED, s);
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}
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public void logOnDelete(int length) {
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sendLogToDropBox(ID_DELETE, length);
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}
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public void logOnInputChar(int length) {
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sendLogToDropBox(ID_INPUT, length);
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}
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}
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