Home | History | Annotate | Download | only in compat 
      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 
     17 package com.android.contacts.compat;
     18 
     19 import android.content.ContentResolver;
     20 import android.content.Context;
     21 import android.database.Cursor;
     22 import android.net.Uri;
     23 import android.os.Build;
     24 import android.provider.BaseColumns;
     25 import android.provider.Telephony;
     26 import android.text.TextUtils;
     27 import android.util.Log;
     28 import android.util.Patterns;
     29 
     30 import java.util.HashSet;
     31 import java.util.Set;
     32 import java.util.regex.Matcher;
     33 import java.util.regex.Pattern;
     34 
     35 /**
     36  * This class contains static utility methods and variables extracted from Telephony and
     37  * SqliteWrapper, and the methods were made visible in API level 23. In this way, we could
     38  * enable the corresponding functionality for pre-M devices. We need maintain this class and keep
     39  * it synced with Telephony and SqliteWrapper.
     40  */
     41 public class TelephonyThreadsCompat {
     42     /**
     43      * Not instantiable.
     44      */
     45     private TelephonyThreadsCompat() {}
     46 
     47     private static final String TAG = "TelephonyThreadsCompat";
     48 
     49     public static long getOrCreateThreadId(Context context, String recipient) {
     50         if (SdkVersionOverride.getSdkVersion(Build.VERSION_CODES.M) >= Build.VERSION_CODES.M) {
     51             return Telephony.Threads.getOrCreateThreadId(context, recipient);
     52         } else {
     53             return getOrCreateThreadIdInternal(context, recipient);
     54         }
     55     }
     56 
     57     // Below is code copied from Telephony and SqliteWrapper
     58     /**
     59      * Private {@code content://} style URL for this table. Used by
     60      * {@link #getOrCreateThreadId(Context, Set)}.
     61      */
     62     private static final Uri THREAD_ID_CONTENT_URI = Uri.parse("content://mms-sms/threadID");
     63 
     64     private static final String[] ID_PROJECTION = { BaseColumns._ID };
     65 
     66     /**
     67      * Regex pattern for names and email addresses.
     68      * <ul>
     69      *     <li><em>mailbox</em> = {@code name-addr}</li>
     70      *     <li><em>name-addr</em> = {@code [display-name] angle-addr}</li>
     71      *     <li><em>angle-addr</em> = {@code [CFWS] "<" addr-spec ">" [CFWS]}</li>
     72      * </ul>
     73      */
     74     private static final Pattern NAME_ADDR_EMAIL_PATTERN =
     75             Pattern.compile("\\s*(\"[^\"]*\"|[^<>\"]+)\\s*<([^<>]+)>\\s*");
     76 
     77     /**
     78      * Copied from {@link Telephony.Threads#getOrCreateThreadId(Context, String)}
     79      */
     80     private static long getOrCreateThreadIdInternal(Context context, String recipient) {
     81         Set<String> recipients = new HashSet<String>();
     82 
     83         recipients.add(recipient);
     84         return getOrCreateThreadIdInternal(context, recipients);
     85     }
     86 
     87     /**
     88      * Given the recipients list and subject of an unsaved message,
     89      * return its thread ID.  If the message starts a new thread,
     90      * allocate a new thread ID.  Otherwise, use the appropriate
     91      * existing thread ID.
     92      *
     93      * <p>Find the thread ID of the same set of recipients (in any order,
     94      * without any additions). If one is found, return it. Otherwise,
     95      * return a unique thread ID.</p>
     96      */
     97     private static long getOrCreateThreadIdInternal(Context context, Set<String> recipients) {
     98         Uri.Builder uriBuilder = THREAD_ID_CONTENT_URI.buildUpon();
     99 
    100         for (String recipient : recipients) {
    101             if (isEmailAddress(recipient)) {
    102                 recipient = extractAddrSpec(recipient);
    103             }
    104 
    105             uriBuilder.appendQueryParameter("recipient", recipient);
    106         }
    107 
    108         Uri uri = uriBuilder.build();
    109 
    110         Cursor cursor = query(
    111                 context.getContentResolver(), uri, ID_PROJECTION, null, null, null);
    112         if (cursor != null) {
    113             try {
    114                 if (cursor.moveToFirst()) {
    115                     return cursor.getLong(0);
    116                 } else {
    117                     Log.e(TAG, "getOrCreateThreadId returned no rows!");
    118                 }
    119             } finally {
    120                 cursor.close();
    121             }
    122         }
    123 
    124         Log.e(TAG, "getOrCreateThreadId failed with uri " + uri.toString());
    125         throw new IllegalArgumentException("Unable to find or allocate a thread ID.");
    126     }
    127 
    128     /**
    129      * Copied from {@link SqliteWrapper#query}
    130      */
    131     private static Cursor query(ContentResolver resolver, Uri uri, String[] projection,
    132             String selection, String[] selectionArgs, String sortOrder) {
    133         try {
    134             return resolver.query(uri, projection, selection, selectionArgs, sortOrder);
    135         } catch (Exception e) {
    136             Log.e(TAG, "Catch an exception when query: ", e);
    137             return null;
    138         }
    139     }
    140 
    141     /**
    142      * Is the specified address an email address?
    143      *
    144      * @param address the input address to test
    145      * @return true if address is an email address; false otherwise.
    146      */
    147     private static boolean isEmailAddress(String address) {
    148         if (TextUtils.isEmpty(address)) {
    149             return false;
    150         }
    151 
    152         String s = extractAddrSpec(address);
    153         Matcher match = Patterns.EMAIL_ADDRESS.matcher(s);
    154         return match.matches();
    155     }
    156 
    157     /**
    158      * Helper method to extract email address from address string.
    159      */
    160     private static String extractAddrSpec(String address) {
    161         Matcher match = NAME_ADDR_EMAIL_PATTERN.matcher(address);
    162 
    163         if (match.matches()) {
    164             return match.group(2);
    165         }
    166         return address;
    167     }
    168 }
    169