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("create table " + Conversation.TABLENAME + " ("
30 + Conversation.UUID + " TEXT PRIMARY KEY, " + Conversation.NAME
31 + " TEXT, " + Conversation.PHOTO_URI + " TEXT, "
32 + Conversation.ACCOUNT + " TEXT, " + Conversation.CONTACT
33 + " TEXT, " + Conversation.CREATED + " NUMBER, "
34 + Conversation.STATUS + " NUMBER)");
35 db.execSQL("create table " + Message.TABLENAME + "( " + Message.UUID
36 + " TEXT PRIMARY KEY, " + Message.CONVERSATION + " TEXT, " + Message.TIME_SENT +" NUMBER, "
37 + Message.COUNTERPART + " TEXT, " + Message.BODY + " TEXT, "
38 + Message.ENCRYPTION + " NUMBER, " + Message.STATUS
39 + " NUMBER)");
40 db.execSQL("create table "+Account.TABLENAME+"("+Account.UUID+" TEXT,"+Account.USERNAME+" TEXT,"+Account.SERVER+" TEXT,"+Account.PASSWORD+" TEXT)");
41 }
42
43 @Override
44 public void onUpgrade(SQLiteDatabase db, int arg1, int arg2) {
45 // TODO Auto-generated method stub
46
47 }
48
49 public static synchronized DatabaseBackend getInstance(Context context) {
50 if (instance == null) {
51 instance = new DatabaseBackend(context);
52 }
53 return instance;
54 }
55
56 public void createConversation(Conversation conversation) {
57 SQLiteDatabase db = this.getWritableDatabase();
58 db.insert(Conversation.TABLENAME, null, conversation.getContentValues());
59 }
60
61 public void createMessage(Message message) {
62 SQLiteDatabase db = this.getWritableDatabase();
63 db.insert(Message.TABLENAME, null, message.getContentValues());
64 }
65
66 public void createAccount(Account account) {
67 SQLiteDatabase db = this.getWritableDatabase();
68 db.insert(Account.TABLENAME,null, account.getContentValues());
69 }
70
71 public int getConversationCount() {
72 SQLiteDatabase db = this.getReadableDatabase();
73 Cursor cursor = db.rawQuery(
74 "select count(uuid) as count from "+Conversation.TABLENAME+" where "+Conversation.STATUS+"="+Conversation.STATUS_AVAILABLE, null);
75 cursor.moveToFirst();
76 return cursor.getInt(0);
77 }
78
79 public List<Conversation> getConversations(int status) {
80 List<Conversation> list = new ArrayList<Conversation>();
81 SQLiteDatabase db = this.getReadableDatabase();
82 String[] selectionArgs = { "" + status };
83 Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME
84 + " where " + Conversation.STATUS + " = ? order by "
85 + Conversation.CREATED + " desc", selectionArgs);
86 while (cursor.moveToNext()) {
87 list.add(Conversation.fromCursor(cursor));
88 }
89 return list;
90 }
91
92 public List<Message> getMessages(Conversation conversation, int limit) {
93 List<Message> list = new ArrayList<Message>();
94 SQLiteDatabase db = this.getReadableDatabase();
95 String[] selectionArgs = { conversation.getUuid() };
96 Cursor cursor = db.query(Message.TABLENAME, null,Message.CONVERSATION +"=?", selectionArgs, null, null,
97 Message.TIME_SENT+" DESC",String.valueOf(limit));
98 if (cursor.getCount() > 0 ) {
99 cursor.moveToLast();
100 do {
101 list.add(Message.fromCursor(cursor));
102 } while (cursor.moveToPrevious());
103 }
104 return list;
105 }
106
107 public Conversation findConversation(Account account, Contact contact) {
108 SQLiteDatabase db = this.getReadableDatabase();
109 String[] selectionArgs = { account.getUuid() , contact.getJid() };
110 Cursor cursor = db.query(Conversation.TABLENAME, null,Conversation.ACCOUNT+"=? AND "+Conversation.CONTACT+"=?", selectionArgs, null, null, null);
111 if (cursor.getCount() == 0) return null;
112 cursor.moveToFirst();
113 return Conversation.fromCursor(cursor);
114 }
115
116 public void updateConversation(Conversation conversation) {
117 SQLiteDatabase db = this.getWritableDatabase();
118 String[] args = {conversation.getUuid()};
119 db.update(Conversation.TABLENAME, conversation.getContentValues(),Conversation.UUID+"=?",args);
120 }
121
122 public List<Account> getAccounts() {
123 List<Account> list = new ArrayList<Account>();
124 SQLiteDatabase db = this.getReadableDatabase();
125 Cursor cursor = db.query(Account.TABLENAME, null, null, null, null, null, null);
126 Log.d("gultsch","found "+cursor.getCount()+" accounts");
127 while (cursor.moveToNext()) {
128 list.add(Account.fromCursor(cursor));
129 }
130 return list;
131 }
132
133 public void updateAccount(Account account) {
134 SQLiteDatabase db = this.getWritableDatabase();
135 String[] args = {account.getUuid()};
136 db.update(Account.TABLENAME, account.getContentValues(),Account.UUID+"=?",args);
137 }
138
139 public void deleteAccount(Account account) {
140 SQLiteDatabase db = this.getWritableDatabase();
141 String[] args = {account.getUuid()};
142 Log.d("gultsch","backend trying to delete account with uuid:"+account.getUuid());
143 db.delete(Account.TABLENAME,Account.UUID+"=?",args);
144 }
145
146}