1 /*
2  * Copyright (C) 2014 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 package com.android.contacts.interactions;
17 
18 import com.google.common.base.Preconditions;
19 
20 import android.content.Context;
21 import android.text.format.DateUtils;
22 
23 import com.android.contacts.common.testing.NeededForTesting;
24 
25 import java.text.DateFormat;
26 
27 import java.util.Calendar;
28 
29 import com.android.contacts.R;
30 
31 
32 /**
33  * Utility methods for interactions and their loaders
34  */
35 public class ContactInteractionUtil {
36 
37     /**
38      * @return a string like (?,?,?...) with {@param count} question marks.
39      */
40     @NeededForTesting
questionMarks(int count)41     public static String questionMarks(int count) {
42         Preconditions.checkArgument(count > 0);
43         StringBuilder sb = new StringBuilder("(?");
44         for (int i = 1; i < count; i++) {
45             sb.append(",?");
46         }
47         return sb.append(")").toString();
48     }
49 
50     /**
51      * Same as {@link formatDateStringFromTimestamp(long, Context, Calendar)} but uses the current
52      * time.
53      */
54     @NeededForTesting
formatDateStringFromTimestamp(long timestamp, Context context)55     public static String formatDateStringFromTimestamp(long timestamp, Context context) {
56         return formatDateStringFromTimestamp(timestamp, context, Calendar.getInstance());
57     }
58 
59     /**
60      * Takes in a timestamp and outputs a human legible date. This checks the timestamp against
61      * compareCalendar.
62      * This formats the date based on a few conditions:
63      * 1. If the timestamp is today, the time is shown
64      * 2. If the timestamp occurs tomorrow or yesterday, that is displayed
65      * 3. Otherwise {Month Date} format is used
66      */
67     @NeededForTesting
formatDateStringFromTimestamp(long timestamp, Context context, Calendar compareCalendar)68     public static String formatDateStringFromTimestamp(long timestamp, Context context,
69             Calendar compareCalendar) {
70         Calendar interactionCalendar = Calendar.getInstance();
71         interactionCalendar.setTimeInMillis(timestamp);
72 
73         // compareCalendar is initialized to today
74         if (compareCalendarDayYear(interactionCalendar, compareCalendar)) {
75             return DateFormat.getTimeInstance(DateFormat.SHORT).format(
76                     interactionCalendar.getTime());
77         }
78 
79         // Turn compareCalendar to yesterday
80         compareCalendar.add(Calendar.DAY_OF_YEAR, -1);
81         if (compareCalendarDayYear(interactionCalendar, compareCalendar)) {
82             return context.getString(R.string.yesterday);
83         }
84 
85         // Turn compareCalendar to tomorrow
86         compareCalendar.add(Calendar.DAY_OF_YEAR, 2);
87         if (compareCalendarDayYear(interactionCalendar, compareCalendar)) {
88             return context.getString(R.string.tomorrow);
89         }
90         return DateUtils.formatDateTime(context, interactionCalendar.getTimeInMillis(),
91                 DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_NO_YEAR);
92     }
93 
94     /**
95      * Compares the day and year of two calendars.
96      */
compareCalendarDayYear(Calendar c1, Calendar c2)97     private static boolean compareCalendarDayYear(Calendar c1, Calendar c2) {
98         return c1.get(Calendar.YEAR) == c2.get(Calendar.YEAR) &&
99                 c1.get(Calendar.DAY_OF_YEAR) == c2.get(Calendar.DAY_OF_YEAR);
100     }
101 }
102