1package de.gultsch.chat.persistance;
2
3import java.util.ArrayList;
4import java.util.List;
5
6import de.gultsch.chat.entities.Account;
7import de.gultsch.chat.entities.Contact;
8import de.gultsch.chat.entities.Conversation;
9import de.gultsch.chat.entities.Message;
10import android.content.Context;
11import android.database.Cursor;
12import android.database.sqlite.SQLiteDatabase;
13import android.database.sqlite.SQLiteOpenHelper;
14import android.util.Log;
15
16public class DatabaseBackend extends SQLiteOpenHelper {
17
18 private static DatabaseBackend instance = null;
19
20 private static final String DATABASE_NAME = "history";
21 private static final int DATABASE_VERSION = 1;
22
23 public DatabaseBackend(Context context) {
24 super(context, DATABASE_NAME, null, DATABASE_VERSION);
25 }
26
27 @Override
28 public void onCreate(SQLiteDatabase db) {
29 db.execSQL("PRAGMA foreign_keys=ON;");
30 db.execSQL("create table " + Account.TABLENAME + "(" + Account.UUID
31 + " TEXT PRIMARY KEY," + Account.USERNAME + " TEXT," + Account.SERVER
32 + " TEXT," + Account.PASSWORD + " TEXT)");
33 db.execSQL("create table " + Conversation.TABLENAME + " ("
34 + Conversation.UUID + " TEXT PRIMARY KEY, " + Conversation.NAME
35 + " TEXT, " + Conversation.PHOTO_URI + " TEXT, "
36 + Conversation.ACCOUNT + " TEXT, " + Conversation.CONTACT
37 + " TEXT, " + Conversation.CREATED + " NUMBER, "
38 + Conversation.STATUS + " NUMBER,"
39 + "FOREIGN KEY("+Conversation.ACCOUNT+") REFERENCES "+Account.TABLENAME+"("+Account.UUID+") ON DELETE CASCADE);");
40 db.execSQL("create table " + Message.TABLENAME + "( " + Message.UUID
41 + " TEXT PRIMARY KEY, " + Message.CONVERSATION + " TEXT, "
42 + Message.TIME_SENT + " NUMBER, " + Message.COUNTERPART
43 + " TEXT, " + Message.BODY + " TEXT, " + Message.ENCRYPTION
44 + " NUMBER, " + Message.STATUS + " NUMBER,"
45 + "FOREIGN KEY("+Message.CONVERSATION+") REFERENCES "+Conversation.TABLENAME+"("+Message.UUID+") ON DELETE CASCADE);");
46 }
47
48 @Override
49 public void onUpgrade(SQLiteDatabase db, int arg1, int arg2) {
50 // TODO Auto-generated method stub
51
52 }
53
54 public static synchronized DatabaseBackend getInstance(Context context) {
55 if (instance == null) {
56 instance = new DatabaseBackend(context);
57 }
58 return instance;
59 }
60
61 public void createConversation(Conversation conversation) {
62 SQLiteDatabase db = this.getWritableDatabase();
63 db.insert(Conversation.TABLENAME, null, conversation.getContentValues());
64 }
65
66 public void createMessage(Message message) {
67 SQLiteDatabase db = this.getWritableDatabase();
68 db.insert(Message.TABLENAME, null, message.getContentValues());
69 }
70
71 public void createAccount(Account account) {
72 SQLiteDatabase db = this.getWritableDatabase();
73 db.insert(Account.TABLENAME, null, account.getContentValues());
74 }
75
76 public int getConversationCount() {
77 SQLiteDatabase db = this.getReadableDatabase();
78 Cursor cursor = db.rawQuery("select count(uuid) as count from "
79 + Conversation.TABLENAME + " where " + Conversation.STATUS
80 + "=" + Conversation.STATUS_AVAILABLE, null);
81 cursor.moveToFirst();
82 return cursor.getInt(0);
83 }
84
85 public List<Conversation> getConversations(int status) {
86 List<Conversation> list = new ArrayList<Conversation>();
87 SQLiteDatabase db = this.getReadableDatabase();
88 String[] selectionArgs = { "" + status };
89 Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME
90 + " where " + Conversation.STATUS + " = ? order by "
91 + Conversation.CREATED + " desc", selectionArgs);
92 while (cursor.moveToNext()) {
93 list.add(Conversation.fromCursor(cursor));
94 }
95 return list;
96 }
97
98 public List<Message> getMessages(Conversation conversation, int limit) {
99 List<Message> list = new ArrayList<Message>();
100 SQLiteDatabase db = this.getReadableDatabase();
101 String[] selectionArgs = { conversation.getUuid() };
102 Cursor cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
103 + "=?", selectionArgs, null, null, Message.TIME_SENT + " DESC",
104 String.valueOf(limit));
105 if (cursor.getCount() > 0) {
106 cursor.moveToLast();
107 do {
108 list.add(Message.fromCursor(cursor));
109 } while (cursor.moveToPrevious());
110 }
111 return list;
112 }
113
114 public Conversation findConversation(Account account, String contactJid) {
115 SQLiteDatabase db = this.getReadableDatabase();
116 String[] selectionArgs = { account.getUuid(), contactJid };
117 Cursor cursor = db.query(Conversation.TABLENAME, null,
118 Conversation.ACCOUNT + "=? AND " + Conversation.CONTACT + "=?",
119 selectionArgs, null, null, null);
120 if (cursor.getCount() == 0)
121 return null;
122 cursor.moveToFirst();
123 return Conversation.fromCursor(cursor);
124 }
125
126 public void updateConversation(Conversation conversation) {
127 SQLiteDatabase db = this.getWritableDatabase();
128 String[] args = { conversation.getUuid() };
129 db.update(Conversation.TABLENAME, conversation.getContentValues(),
130 Conversation.UUID + "=?", args);
131 }
132
133 public List<Account> getAccounts() {
134 List<Account> list = new ArrayList<Account>();
135 SQLiteDatabase db = this.getReadableDatabase();
136 Cursor cursor = db.query(Account.TABLENAME, null, null, null, null,
137 null, null);
138 Log.d("gultsch", "found " + cursor.getCount() + " accounts");
139 while (cursor.moveToNext()) {
140 list.add(Account.fromCursor(cursor));
141 }
142 return list;
143 }
144
145 public void updateAccount(Account account) {
146 SQLiteDatabase db = this.getWritableDatabase();
147 String[] args = { account.getUuid() };
148 db.update(Account.TABLENAME, account.getContentValues(), Account.UUID
149 + "=?", args);
150 }
151
152 public void deleteAccount(Account account) {
153 SQLiteDatabase db = this.getWritableDatabase();
154 String[] args = { account.getUuid() };
155 Log.d("gultsch", "backend trying to delete account with uuid:"
156 + account.getUuid());
157 db.delete(Account.TABLENAME, Account.UUID + "=?", args);
158 }
159
160 @Override
161 public SQLiteDatabase getWritableDatabase() {
162 SQLiteDatabase db = super.getWritableDatabase();
163 db.execSQL("PRAGMA foreign_keys=ON;");
164 return db;
165 }
166}