Clear local database on logout.

tinode · Feb 25, 2023 · 8bd61dd · 8bd61dd
1 parent 310aa5a
commit 8bd61dd
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Showing 7 changed files with 86 additions and 1 deletion.
diff --git a/app/src/main/java/co/tinode/tindroid/db/AccountDb.java b/app/src/main/java/co/tinode/tindroid/db/AccountDb.java
@@ -5,6 +5,7 @@
 import android.database.SQLException;
 import android.database.sqlite.SQLiteDatabase;
 import android.provider.BaseColumns;
+import android.util.Log;
 
 /**
  * List of Tinode accounts.
@@ -21,6 +22,7 @@ public class AccountDb implements BaseColumns {
     private static final String COLUMN_NAME_HOST_URI = "host_uri";
     private static final String COLUMN_NAME_CRED_METHODS = "cred_methods";
     private static final String COLUMN_NAME_DEVICE_ID = "device_id";
+    private static final String TAG = "AccountDb";
 
     /**
      * Statements to drop accounts table and index
@@ -120,6 +122,20 @@ static void delete(SQLiteDatabase db, StoredAccount acc) {
         db.delete(TABLE_NAME, _ID + "=" + acc.id, null);
     }
 
+    /**
+     * Deletes all records from 'accounts' table.
+     *
+     * @param db Database to use.
+     */
+    static void truncateTable(SQLiteDatabase db) {
+        try {
+            // 'DELETE FROM table' in SQLite is equivalent to truncation.
+            db.delete(TABLE_NAME, null, null);
+        } catch (SQLException ex) {
+            Log.w(TAG, "Delete failed", ex);
+        }
+    }
+
     static StoredAccount getByUid(SQLiteDatabase db, String uid) {
         if (uid == null) {
             return null;

diff --git a/app/src/main/java/co/tinode/tindroid/db/BaseDb.java b/app/src/main/java/co/tinode/tindroid/db/BaseDb.java
@@ -272,6 +272,15 @@ void setUid(String uid, String hostURI) {
         }
     }
 
+    void clearDb() {
+        SQLiteDatabase db = sInstance.getWritableDatabase();
+        MessageDb.truncateTable(db);
+        SubscriberDb.truncateTable(db);
+        TopicDb.truncateTable(db);
+        UserDb.truncateTable(db);
+        AccountDb.truncateTable(db);
+    }
+
     void updateCredentials(String[] credMethods) {
         if (mAcc != null) {
             if (AccountDb.updateCredentials(sInstance.getWritableDatabase(), credMethods)) {

diff --git a/app/src/main/java/co/tinode/tindroid/db/MessageDb.java b/app/src/main/java/co/tinode/tindroid/db/MessageDb.java
@@ -777,6 +777,20 @@ static void deleteAll(SQLiteDatabase db, long topicId) {
         }
     }
 
+    /**
+     * Deletes all records from 'messages' table.
+     *
+     * @param db Database to use.
+     */
+    static void truncateTable(SQLiteDatabase db) {
+        try {
+            // 'DELETE FROM table' in SQLite is equivalent to truncation.
+            db.delete(TABLE_NAME, null, null);
+        } catch (SQLException ex) {
+            Log.w(TAG, "Delete failed", ex);
+        }
+    }
+
     /**
      * Delete failed messages in a given topic.
      *

diff --git a/app/src/main/java/co/tinode/tindroid/db/SqlStore.java b/app/src/main/java/co/tinode/tindroid/db/SqlStore.java
@@ -6,7 +6,6 @@
 import android.util.Log;
 
 import java.io.Closeable;
-import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Date;
 import java.util.Iterator;
@@ -82,7 +81,9 @@ public boolean isReady() {
     }
 
     public void logout() {
+        // Clear the database.
         mDbh.setUid(null, null);
+        mDbh.clearDb();
     }
 
     @Override

diff --git a/app/src/main/java/co/tinode/tindroid/db/SubscriberDb.java b/app/src/main/java/co/tinode/tindroid/db/SubscriberDb.java
@@ -260,6 +260,20 @@ static boolean deleteForTopic(SQLiteDatabase db, long topicId) {
         return db.delete(TABLE_NAME, COLUMN_NAME_TOPIC_ID + "=" + topicId, null) > 0;
     }
 
+    /**
+     * Deletes all records from 'subscribers' table.
+     *
+     * @param db Database to use.
+     */
+    static void truncateTable(SQLiteDatabase db) {
+        try {
+            // 'DELETE FROM table' in SQLite is equivalent to truncation.
+            db.delete(TABLE_NAME, null, null);
+        } catch (SQLException ex) {
+            Log.w(TAG, "Delete failed", ex);
+        }
+    }
+
     /**
      * Get the next available senderId for the given topic. Min Id == 1.
      *

diff --git a/app/src/main/java/co/tinode/tindroid/db/TopicDb.java b/app/src/main/java/co/tinode/tindroid/db/TopicDb.java
@@ -534,6 +534,20 @@ static void deleteAll(SQLiteDatabase db, long accId) {
         db.delete(TABLE_NAME, COLUMN_NAME_ACCOUNT_ID + "=" + accId, null);
     }
 
+    /**
+     * Deletes all records from 'topics' table.
+     *
+     * @param db Database to use.
+     */
+    static void truncateTable(SQLiteDatabase db) {
+        try {
+            // 'DELETE FROM table' in SQLite is equivalent to truncation.
+            db.delete(TABLE_NAME, null, null);
+        } catch (SQLException ex) {
+            Log.w(TAG, "Delete failed", ex);
+        }
+    }
+
     /**
      * Given topic name, get it's database _id
      *

diff --git a/app/src/main/java/co/tinode/tindroid/db/UserDb.java b/app/src/main/java/co/tinode/tindroid/db/UserDb.java
@@ -2,8 +2,10 @@
 
 import android.content.ContentValues;
 import android.database.Cursor;
+import android.database.SQLException;
 import android.database.sqlite.SQLiteDatabase;
 import android.provider.BaseColumns;
+import android.util.Log;
 
 import java.util.Date;
 
@@ -80,6 +82,7 @@ public class UserDb implements BaseColumns {
      */
     static final String DROP_INDEX =
             "DROP INDEX IF EXISTS " + INDEX_NAME;
+    private static final String TAG = "UserDb";
 
     /**
      * Save user to DB
@@ -168,6 +171,20 @@ static void deleteAll(SQLiteDatabase db, long accId) {
         db.delete(TABLE_NAME, COLUMN_NAME_ACCOUNT_ID + "=" + accId, null);
     }
 
+    /**
+     * Deletes all records from 'users' table.
+     *
+     * @param db Database to use.
+     */
+    static void truncateTable(SQLiteDatabase db) {
+        try {
+            // 'DELETE FROM table' in SQLite is equivalent to truncation.
+            db.delete(TABLE_NAME, null, null);
+        } catch (SQLException ex) {
+            Log.w(TAG, "Delete failed", ex);
+        }
+    }
+
     /**
      * Given UID, get it's database _id
      *