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
17package com.android.internal.telephony;
18
19import android.util.Log;
20import android.content.Context;
21import android.content.ContentResolver;
22import android.database.Cursor;
23
24import com.android.internal.telephony.HbpcdLookup;
25import com.android.internal.telephony.HbpcdLookup.MccIdd;
26import com.android.internal.telephony.HbpcdLookup.MccLookup;
27import com.android.internal.telephony.HbpcdLookup.MccSidConflicts;
28import com.android.internal.telephony.HbpcdLookup.MccSidRange;
29import com.android.internal.telephony.HbpcdLookup.ArbitraryMccSidMatch;
30
31public final class HbpcdUtils {
32    private static final String LOG_TAG = "HbpcdUtils";
33    private static final boolean DBG = false;
34    private ContentResolver resolver = null;
35
36    public HbpcdUtils(Context context) {
37        resolver = context.getContentResolver();
38    }
39
40    /**
41     *  Resolves the unknown MCC with SID and Timezone information.
42    */
43    public int getMcc(int sid, int tz, int DSTflag, boolean isNitzTimeZone) {
44        int tmpMcc = 0;
45
46        // check if SID exists in arbitrary_mcc_sid_match table.
47        // these SIDs are assigned to more than 1 operators, but they are known to
48        // be used by a specific operator, other operators having the same SID are
49        // not using it currently, if that SID is in this table, we don't need to
50        // check other tables.
51        String projection2[] = {ArbitraryMccSidMatch.MCC};
52        Cursor c2 = resolver.query(ArbitraryMccSidMatch.CONTENT_URI, projection2,
53                            ArbitraryMccSidMatch.SID + "=" + sid, null, null);
54
55        if (c2 != null) {
56            int c2Counter = c2.getCount();
57            if (DBG) {
58                Log.d(LOG_TAG, "Query unresolved arbitrary table, entries are " + c2Counter);
59            }
60            if (c2Counter == 1) {
61                if (DBG) {
62                    Log.d(LOG_TAG, "Query Unresolved arbitrary returned the cursor " + c2 );
63                }
64                c2.moveToFirst();
65                tmpMcc = c2.getInt(0);
66                if (DBG) {
67                    Log.d(LOG_TAG, "MCC found in arbitrary_mcc_sid_match: " + tmpMcc);
68                }
69                c2.close();
70                return tmpMcc;
71            }
72            c2.close();
73        }
74
75        // Then check if SID exists in mcc_sid_conflict table.
76        // and use the timezone in mcc_lookup table to check which MCC matches.
77        String projection3[] = {MccSidConflicts.MCC};
78        Cursor c3 = resolver.query(MccSidConflicts.CONTENT_URI, projection3,
79                MccSidConflicts.SID_CONFLICT + "=" + sid + " and (((" +
80                MccLookup.GMT_OFFSET_LOW + "<=" + tz + ") and (" + tz + "<=" +
81                MccLookup.GMT_OFFSET_HIGH + ") and (" + "0=" + DSTflag + ")) or ((" +
82                MccLookup.GMT_DST_LOW + "<=" + tz + ") and (" + tz + "<=" +
83                MccLookup.GMT_DST_HIGH + ") and (" + "1=" + DSTflag + ")))",
84                        null, null);
85        if (c3 != null) {
86            int c3Counter = c3.getCount();
87            if (c3Counter > 0) {
88                if (c3Counter > 1) {
89                    Log.w(LOG_TAG, "something wrong, get more results for 1 conflict SID: " + c3);
90                }
91                if (DBG) Log.d(LOG_TAG, "Query conflict sid returned the cursor " + c3 );
92                c3.moveToFirst();
93                tmpMcc = c3.getInt(0);
94                if (DBG) Log.d(LOG_TAG,
95                        "MCC found in mcc_lookup_table. Return tmpMcc = " + tmpMcc);
96                c3.close();
97                if (isNitzTimeZone) {
98                    return tmpMcc;
99                } else {
100                    // time zone is not accurate, it may get wrong mcc, ignore it.
101                    if (DBG) Log.d(LOG_TAG, "time zone is not accurate, mcc may be "
102                            + tmpMcc);
103                        return 0;
104                }
105            }
106        }
107
108        // if there is no conflict, then check if SID is in mcc_sid_range.
109        String projection5[] = {MccSidRange.MCC};
110        Cursor c5 = resolver.query(MccSidRange.CONTENT_URI, projection5,
111                MccSidRange.RANGE_LOW + "<=" + sid + " and " +
112                MccSidRange.RANGE_HIGH + ">=" + sid,
113                null, null);
114        if (c5 != null) {
115            if (c5.getCount() > 0) {
116                if (DBG) Log.d(LOG_TAG, "Query Range returned the cursor " + c5 );
117                c5.moveToFirst();
118                tmpMcc = c5.getInt(0);
119                if (DBG) Log.d(LOG_TAG, "SID found in mcc_sid_range. Return tmpMcc = " + tmpMcc);
120                c5.close();
121                return tmpMcc;
122            }
123            c5.close();
124        }
125        if (DBG) Log.d(LOG_TAG, "SID NOT found in mcc_sid_range.");
126
127        if (DBG) Log.d(LOG_TAG, "Exit getMccByOtherFactors. Return tmpMcc =  " + tmpMcc );
128        // If unknown MCC still could not be resolved,
129        return tmpMcc;
130    }
131
132    /**
133     *  Gets country information with given MCC.
134    */
135    public String getIddByMcc(int mcc) {
136        if (DBG) Log.d(LOG_TAG, "Enter getHbpcdInfoByMCC.");
137        String idd = "";
138
139        Cursor c = null;
140
141        String projection[] = {MccIdd.IDD};
142        Cursor cur = resolver.query(MccIdd.CONTENT_URI, projection,
143                MccIdd.MCC + "=" + mcc, null, null);
144        if (cur != null) {
145            if (cur.getCount() > 0) {
146                if (DBG) Log.d(LOG_TAG, "Query Idd returned the cursor " + cur );
147                // TODO: for those country having more than 1 IDDs, need more information
148                // to decide which IDD would be used. currently just use the first 1.
149                cur.moveToFirst();
150                idd = cur.getString(0);
151                if (DBG) Log.d(LOG_TAG, "IDD = " + idd);
152
153            }
154            cur.close();
155        }
156        if (c != null) c.close();
157
158        if (DBG) Log.d(LOG_TAG, "Exit getHbpcdInfoByMCC.");
159        return idd;
160    }
161}
162