1+ package fr .free .nrw .commons .recentlanguages ;
2+
3+ import static fr .free .nrw .commons .recentlanguages .RecentLanguagesDao .Table .COLUMN_NAME ;
4+ import static fr .free .nrw .commons .recentlanguages .RecentLanguagesDao .Table .TABLE_NAME ;
5+
6+ import android .content .ContentValues ;
7+ import android .database .Cursor ;
8+ import android .database .sqlite .SQLiteDatabase ;
9+ import android .database .sqlite .SQLiteQueryBuilder ;
10+ import android .net .Uri ;
11+ import android .text .TextUtils ;
12+ import androidx .annotation .NonNull ;
13+ import fr .free .nrw .commons .BuildConfig ;
14+ import fr .free .nrw .commons .data .DBOpenHelper ;
15+ import fr .free .nrw .commons .di .CommonsDaggerContentProvider ;
16+ import javax .inject .Inject ;
17+ import timber .log .Timber ;
18+
19+ /**
20+ * Content provider of recently used languages
21+ */
22+ public class RecentLanguagesContentProvider extends CommonsDaggerContentProvider {
23+
24+ private static final String BASE_PATH = "recent_languages" ;
25+ public static final Uri BASE_URI =
26+ Uri .parse ("content://" + BuildConfig .RECENT_LANGUAGE_AUTHORITY + "/" + BASE_PATH );
27+
28+
29+ /**
30+ * Append language code to the base uri
31+ * @param languageCode Code of a language
32+ */
33+ public static Uri uriForCode (final String languageCode ) {
34+ return Uri .parse (BASE_URI + "/" + languageCode );
35+ }
36+
37+ @ Inject
38+ DBOpenHelper dbOpenHelper ;
39+
40+ @ Override
41+ public String getType (@ NonNull final Uri uri ) {
42+ return null ;
43+ }
44+
45+ /**
46+ * Queries the SQLite database for the recently used languages
47+ * @param uri : contains the uri for recently used languages
48+ * @param projection : contains the all fields of the table
49+ * @param selection : handles Where
50+ * @param selectionArgs : the condition of Where clause
51+ * @param sortOrder : ascending or descending
52+ */
53+ @ Override
54+ public Cursor query (@ NonNull final Uri uri , final String [] projection , final String selection ,
55+ final String [] selectionArgs , final String sortOrder ) {
56+ final SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder ();
57+ queryBuilder .setTables (TABLE_NAME );
58+ final SQLiteDatabase db = dbOpenHelper .getReadableDatabase ();
59+ final Cursor cursor = queryBuilder .query (db , projection , selection ,
60+ selectionArgs , null , null , sortOrder );
61+ cursor .setNotificationUri (getContext ().getContentResolver (), uri );
62+ return cursor ;
63+ }
64+
65+ /**
66+ * Handles the update query of local SQLite Database
67+ * @param uri : contains the uri for recently used languages
68+ * @param contentValues : new values to be entered to db
69+ * @param selection : handles Where
70+ * @param selectionArgs : the condition of Where clause
71+ */
72+ @ Override
73+ public int update (@ NonNull final Uri uri , final ContentValues contentValues ,
74+ final String selection , final String [] selectionArgs ) {
75+ final SQLiteDatabase sqlDB = dbOpenHelper .getWritableDatabase ();
76+ final int rowsUpdated ;
77+ if (TextUtils .isEmpty (selection )) {
78+ final int id = Integer .parseInt (uri .getLastPathSegment ());
79+ rowsUpdated = sqlDB .update (TABLE_NAME ,
80+ contentValues ,
81+ COLUMN_NAME + " = ?" ,
82+ new String []{String .valueOf (id )});
83+ } else {
84+ throw new IllegalArgumentException (
85+ "Parameter `selection` should be empty when updating an ID" );
86+ }
87+
88+ getContext ().getContentResolver ().notifyChange (uri , null );
89+ return rowsUpdated ;
90+ }
91+
92+ /**
93+ * Handles the insertion of new recently used languages record to local SQLite Database
94+ * @param uri : contains the uri for recently used languages
95+ * @param contentValues : new values to be entered to db
96+ */
97+ @ Override
98+ public Uri insert (@ NonNull final Uri uri , final ContentValues contentValues ) {
99+ final SQLiteDatabase sqlDB = dbOpenHelper .getWritableDatabase ();
100+ final long id = sqlDB .insert (TABLE_NAME , null , contentValues );
101+ getContext ().getContentResolver ().notifyChange (uri , null );
102+ return Uri .parse (BASE_URI + "/" + id );
103+ }
104+
105+ /**
106+ * Handles the deletion of new recently used languages record to local SQLite Database
107+ * @param uri : contains the uri for recently used languages
108+ */
109+ @ Override
110+ public int delete (@ NonNull final Uri uri , final String s , final String [] strings ) {
111+ final int rows ;
112+ final SQLiteDatabase db = dbOpenHelper .getReadableDatabase ();
113+ Timber .d ("Deleting recently used language %s" , uri .getLastPathSegment ());
114+ rows = db .delete (
115+ TABLE_NAME ,
116+ "language_code = ?" ,
117+ new String []{uri .getLastPathSegment ()}
118+ );
119+ getContext ().getContentResolver ().notifyChange (uri , null );
120+ return rows ;
121+ }
122+ }
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