Friends list is automatically refreshed

app/src/main/java/org/communiquons/android/comunic/client/MainActivity.java

@@ -1,7 +1,6 @@
 package org.communiquons.android.comunic.client;
 
 import android.app.AlertDialog;
-import android.app.FragmentManager;
 import android.app.FragmentTransaction;
 import android.content.DialogInterface;
 import android.content.Intent;
@@ -14,9 +13,10 @@ import android.view.MenuItem;
 import android.widget.Toast;
 
 import org.communiquons.android.comunic.client.api.APIRequest;
-import org.communiquons.android.comunic.client.api.APIRequestTask;
 import org.communiquons.android.comunic.client.data.Account.Account;
 import org.communiquons.android.comunic.client.data.Account.AccountUtils;
+import org.communiquons.android.comunic.client.data.DatabaseHelper;
+import org.communiquons.android.comunic.client.data.friendsList.FriendRefreshLoopRunnable;
 import org.communiquons.android.comunic.client.fragments.FriendsListFragment;
 import org.communiquons.android.comunic.client.fragments.UserInfosFragment;
 
@@ -38,6 +38,16 @@ public class MainActivity extends AppCompatActivity {
      */
     private AccountUtils aUtils;
 
+    /**
+     * Friends list refresh thread
+     */
+    private Thread friendsListRefreshThread;
+
+    /**
+     * Database helper
+     */
+    private DatabaseHelper dbHelper;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -63,7 +73,10 @@ public class MainActivity extends AppCompatActivity {
             Toast.makeText(this, R.string.err_no_internet_connection, Toast.LENGTH_SHORT).show();
         }
 
-        //If it is the first time the application is launched, started the user friends tab
+        //Initialize DatabaseHelper
+        dbHelper = new DatabaseHelper(getApplicationContext());
+
+        //If it is the first time the application is launched, start the user friends tab
         if(savedInstanceState == null){
             openFriendsFragment();
         }
@@ -77,7 +90,22 @@ public class MainActivity extends AppCompatActivity {
         if(!account.signed_in()){
             //Open the login activity
             startActivity(new Intent(this, LoginActivity.class));
+            return;
         }
+
+        //Refresh friends list through a thread
+        friendsListRefreshThread = new Thread(
+                new FriendRefreshLoopRunnable(getApplicationContext(), dbHelper));
+        friendsListRefreshThread.start();
+    }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+
+        //Stop the friends list refresh thread
+        if(friendsListRefreshThread != null)
+            friendsListRefreshThread.interrupt();
     }
 
     /**

app/src/main/java/org/communiquons/android/comunic/client/data/friendsList/FriendRefreshLoopRunnable.java

@@ -0,0 +1,61 @@
+package org.communiquons.android.comunic.client.data.friendsList;
+
+
+import android.content.Context;
+
+import org.communiquons.android.comunic.client.data.DatabaseHelper;
+
+/**
+ * Automatically refresh friends list thread
+ *
+ * Goal this thread : this thread is killed when it is not required anymore to refresh the friends
+ * list.
+ *
+ * However, it launches periodically another thread, FriendsListRefreshRunnable, which is never
+ * killed, in order not to get errors.
+ *
+ * @author Pierre HUBERT
+ * Created by pierre on 11/19/17.
+ */
+
+public class FriendRefreshLoopRunnable implements Runnable {
+
+    private final Object object = new Object();
+
+    private Context context;
+    private DatabaseHelper dbHelper;
+
+    public FriendRefreshLoopRunnable(Context context, DatabaseHelper dbHelper){
+        this.context = context;
+        this.dbHelper = dbHelper;
+    }
+
+    /**
+     * Perpetual loop that only stops when it get killed
+     */
+    @Override
+    public void run() {
+
+        synchronized (object) {
+
+            Thread thread;
+
+            while (true) {
+
+                //Create a refresh thread
+                thread = new Thread(new FriendsListRefreshRunnable(context, dbHelper));
+                thread.start();
+
+                try {
+                    thread.join();
+                    object.wait(15000);
+                } catch (Exception e) {
+                    e.printStackTrace();
+                    return; //Stop the refresh loop
+                }
+            }
+        }
+
+    }
+
+}

app/src/main/java/org/communiquons/android/comunic/client/data/friendsList/FriendsListRefreshRunnable.java

@@ -0,0 +1,54 @@
+package org.communiquons.android.comunic.client.data.friendsList;
+
+import android.content.Context;
+
+import org.communiquons.android.comunic.client.data.DatabaseHelper;
+
+import java.util.ArrayList;
+
+/**
+ * Auto friends list refresh runnable
+ *
+ * @author Pierre HUBERT
+ * Created by pierre on 11/19/17.
+ */
+
+class FriendsListRefreshRunnable implements Runnable {
+
+    /**
+     * This runnable requires a context object in order to connect to the API
+     *
+     * The context of the application (or of the activity)
+     */
+    private Context mContext;
+
+    /**
+     * Database object
+     */
+    private DatabaseHelper dbHelper;
+
+    /**
+     * Runnable constructor
+     *
+     * @param context The context of the application
+     * @param dbHelper Database helper
+     */
+    FriendsListRefreshRunnable(Context context, DatabaseHelper dbHelper){
+        this.mContext = context;
+        this.dbHelper = dbHelper;
+    }
+
+    @Override
+    public void run() {
+
+        GetFriendsList getFriendsList = new GetFriendsList(mContext);
+        FriendsListDbHelper friendsDBHelper = new FriendsListDbHelper(dbHelper);
+
+        //Get the latest version of the list
+        ArrayList<Friend> friendsList = getFriendsList.get();
+
+        //Save it (only in case of success)
+        if(friendsList != null)
+            friendsDBHelper.update_list(friendsList);
+    }
+}

app/src/main/java/org/communiquons/android/comunic/client/data/friendsList/GetFriendsList.java

@@ -1,6 +1,7 @@
 package org.communiquons.android.comunic.client.data.friendsList;
 
 import android.content.Context;
+import android.support.annotation.Nullable;
 
 import org.communiquons.android.comunic.client.api.APIRequest;
 import org.communiquons.android.comunic.client.api.APIRequestParameters;
@@ -38,6 +39,7 @@ class GetFriendsList {
      *
      * @return The list of friend of the user
      */
+    @Nullable
     ArrayList<Friend> get(){
 
         //Prepare the API request

app/src/main/java/org/communiquons/android/comunic/client/data/friendsList/GetFriendsListTask.java

@@ -3,6 +3,8 @@ package org.communiquons.android.comunic.client.data.friendsList;
 import android.content.Context;
 import android.os.AsyncTask;
 
+import org.communiquons.android.comunic.client.data.DatabaseHelper;
+
 import java.util.ArrayList;
 
 /**
@@ -17,15 +19,15 @@ public abstract class GetFriendsListTask extends AsyncTask<Void, Void, ArrayList
     /**
      * The context of the task
      */
-    private Context mContext;
+    private DatabaseHelper dbHelper;
 
     /**
      * Public constructor to the class
      *
-     * @param context the context of execution of the refresh task
+     * @param dbHelper Database helper
      */
-    public GetFriendsListTask(Context context){
+    public GetFriendsListTask(DatabaseHelper dbHelper){
-        mContext = context;
+        this.dbHelper = dbHelper;
     }
 
     /**
@@ -47,6 +49,6 @@ public abstract class GetFriendsListTask extends AsyncTask<Void, Void, ArrayList
     @Override
     protected ArrayList<Friend> doInBackground(Void... params) {
         //Create the GetFriendList object and use it to fetch the list
-        return new GetFriendsList(mContext).get();
+        return new FriendsListDbHelper(dbHelper).get_list();
     }
 }

app/src/main/java/org/communiquons/android/comunic/client/fragments/FriendsListFragment.java

@@ -83,7 +83,7 @@ public class FriendsListFragment extends Fragment {
         //Display loading bar
         display_progress_bar(true);
 
-        new GetFriendsListTask(getActivity().getApplicationContext()){
+        new GetFriendsListTask(mDbHelper){
 
             @Override
             protected void onPostExecute(ArrayList<Friend> friendsList) {