Conversation are cached in the local database

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

@@ -68,7 +68,7 @@ public class DatabaseHelper extends SQLiteOpenHelper {
                     ConversationsListSchema.COLUMN_NAME_CONVERSATION_NAME + TEXT_TYPE + COMMA_SEP +
                     ConversationsListSchema.COLUMN_NAME_CONVERSATION_FOLLOWING + INTEGER_TYPE + COMMA_SEP +
                     ConversationsListSchema.COLUMN_NAME_CONVERSATION_SAW_LAST_MESSAGES + INTEGER_TYPE + COMMA_SEP +
-                    ConversationsListSchema.COLUMN_NAME_CONVERSATION_MEMBERS + TEXT_TYPE + COMMA_SEP +
+                    ConversationsListSchema.COLUMN_NAME_CONVERSATION_MEMBERS + TEXT_TYPE +
             " )";
 
     private static final String SQL_DELETE_CONVERSATIONS_LIST_TABLE = "DROP TABLE IF EXISTS " +

app/src/main/java/org/communiquons/android/comunic/client/data/conversations/ConversationsInfo.java

@@ -193,7 +193,40 @@ public class ConversationsInfo {
         return members;
     }
 
+    /**
+     * Get the list of members as a string
+     *
+     * @return The list of members as a string
+     */
+    public String getMembersString() {
+        if(members == null)
+            return "";
 
+        String result = "";
+
+        for(int member : members){
+            result += member + ",";
+        }
+
+        return result;
+    }
+
+    /**
+     * Set the list of members from a string generated using {@link #getMembersString()}
+     *
+     * @param input The input string
+     */
+    public void parseMembersString(String input){
+
+        members = new ArrayList<>();
+
+        String[] membersStr = input.split(",");
+
+        for(String member : membersStr){
+            members.add(Integer.decode(member));
+        }
+
+    }
 
 
     /**

app/src/main/java/org/communiquons/android/comunic/client/data/conversations/ConversationsListDbHelper.java

@@ -0,0 +1,120 @@
+package org.communiquons.android.comunic.client.data.conversations;
+
+import android.content.ContentValues;
+import android.database.sqlite.SQLiteDatabase;
+import android.support.annotation.NonNull;
+
+import org.communiquons.android.comunic.client.data.DatabaseContract.ConversationsListSchema;
+import org.communiquons.android.comunic.client.data.DatabaseHelper;
+
+import java.util.ArrayList;
+
+/**
+ * Conversations DB Helper
+ *
+ * @author Pierre HUBERT
+ * Created by pierre on 12/13/17.
+ */
+
+public class ConversationsListDbHelper {
+
+    /**
+     * Pointer on the database
+     */
+    private DatabaseHelper databaseHelper;
+
+    /**
+     * Conversations list table name
+     */
+    private static final String TABLE_NAME = ConversationsListSchema.TABLE_NAME;
+
+    /**
+     * Create the conversation database helper
+     *
+     * @param databaseHelper Object pointing on database helper
+     */
+    public ConversationsListDbHelper(@NonNull DatabaseHelper databaseHelper){
+        this.databaseHelper = databaseHelper;
+    }
+
+
+    /**
+     * Update the list of conversations currently installed in the system with a new list
+     *
+     * @param list The new list of conversation
+     * @return TRUE for a success / FALSE else
+     */
+    boolean update_list(ArrayList<ConversationsInfo> list){
+
+        //Remove any old list of conversations
+        delete_all();
+
+        SQLiteDatabase db = databaseHelper.getWritableDatabase();
+
+        //Process the list of conversation
+        boolean success = true;
+        for(ConversationsInfo info : list){
+            if(!insert(db, info))
+                success = false;
+        }
+
+        db.close();
+
+        return success;
+    }
+
+    /**
+     * Delete all the list of conversations
+     */
+    private void delete_all(){
+        SQLiteDatabase db = databaseHelper.getWritableDatabase();
+
+        //Prepare the request
+        db.delete(TABLE_NAME, null, null);
+
+        db.close();
+    }
+
+    /**
+     * Insert a new conversation in the database
+     * @param db Pointer on active database
+     * @param info Informations about the conversation to insert
+     * @return TRUE for a success / False else
+     */
+    private boolean insert(@NonNull SQLiteDatabase db, @NonNull ConversationsInfo info){
+
+        ContentValues values = getContentValues(info);
+
+        return -1 == db.insert(TABLE_NAME, null, values);
+
+    }
+
+    /**
+     * Get the contentvalues corresponding to a conversation
+     *
+     * @param info Information about a conversation
+     * @return The values of the conservation
+     */
+    private ContentValues getContentValues(ConversationsInfo info){
+        ContentValues values = new ContentValues();
+
+        values.put(ConversationsListSchema.COLUMN_NAME_CONVERSATION_ID, info.getID());
+        values.put(ConversationsListSchema.COLUMN_NAME_CONVERSATION_ID_OWNER, info.getID_owner());
+        values.put(ConversationsListSchema.COLUMN_NAME_CONVERSATION_LAST_ACTIVE,
+                info.getLast_active());
+
+        String name = info.hasName() ? info.getName() : "null";
+        values.put(ConversationsListSchema.COLUMN_NAME_CONVERSATION_NAME, name);
+
+        values.put(ConversationsListSchema.COLUMN_NAME_CONVERSATION_FOLLOWING,
+                info.isFollowing() ? 1 : 0);
+
+        values.put(ConversationsListSchema.COLUMN_NAME_CONVERSATION_SAW_LAST_MESSAGES,
+                info.hasSaw_last_message() ? 1 : 0);
+
+        values.put(ConversationsListSchema.COLUMN_NAME_CONVERSATION_MEMBERS,
+                info.getMembersString());
+
+        return values;
+    }
+}

app/src/main/java/org/communiquons/android/comunic/client/data/conversations/ConversationsListHelper.java

@@ -8,6 +8,7 @@ import android.util.Log;
 import org.communiquons.android.comunic.client.api.APIRequest;
 import org.communiquons.android.comunic.client.api.APIRequestParameters;
 import org.communiquons.android.comunic.client.api.APIResponse;
+import org.communiquons.android.comunic.client.data.DatabaseHelper;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
@@ -30,13 +31,40 @@ public class ConversationsListHelper {
      */
     private Context mContext;
 
+    /**
+     * Conversations list database helper
+     */
+    private ConversationsListDbHelper convDBHelper;
+
     /**
      * The constructor of the class
      *
      * @param context The context of execution of the application
+     * @param dbHelper Database helper
      */
-    public ConversationsListHelper(Context context){
+    public ConversationsListHelper(Context context, DatabaseHelper dbHelper){
         mContext = context;
+        convDBHelper = new ConversationsListDbHelper(dbHelper);
+    }
+
+    /**
+     * Get the list of conversation or null in case of failure
+     *
+     * @return The list of conversations
+     */
+    @Nullable
+    public ArrayList<ConversationsInfo> get(){
+
+        //Download a new list of conversations
+        ArrayList<ConversationsInfo> list = download();
+
+        if(list != null){
+            //Save the list
+            convDBHelper.update_list(list);
+        }
+
+        //Return the list
+        return list;
     }
 
     /**
@@ -45,7 +73,7 @@ public class ConversationsListHelper {
      * @return The list of conversations
      */
     @Nullable
-    public ArrayList<ConversationsInfo> download(){
+    private ArrayList<ConversationsInfo> download(){
 
         ArrayList<ConversationsInfo> list = new ArrayList<>();