Can get a list of messages from the server.

helpers/conversationhelper.cpp

@@ -1,3 +1,6 @@
+#include <QJsonObject>
+#include <QJsonArray>
+
 #include "apihelper.h"
 #include "conversationhelper.h"
 #include "../data/apirequest.h"
@@ -18,6 +21,17 @@ void ConversationHelper::sendMessage(const NewConversationMessage &message)
     mAPIHelper->execute(request);
 }
 
+void ConversationHelper::getMessages(int conversationID, int last_message_id)
+{
+    APIRequest *request = new APIRequest;
+    request->setURI("conversations/refresh_single");
+    request->addInt("conversationID", conversationID);
+    request->addInt("last_message_id", last_message_id > 0 ? last_message_id : 0);
+
+    connect(request, &APIRequest::finished, this, &ConversationHelper::getMessagesFinished);
+    mAPIHelper->execute(request);
+}
+
 void ConversationHelper::sendMessageFinished(int code)
 {
     //Delete sender
@@ -31,3 +45,33 @@ void ConversationHelper::sendMessageFinished(int code)
     //Success
     emit sendMessageCallback(true);
 }
+
+void ConversationHelper::getMessagesFinished(int code, const QJsonDocument &document)
+{
+    //Delete sender
+    qobject_cast<APIRequest *>(sender())->deleteLater();
+
+    //Check if the operation is not a success
+    if(code != 200){
+        emit getMessagesCallback(false, QList<ConversationMessage>());
+        return;
+    }
+
+    QJsonArray array = document.array();
+    QList<ConversationMessage> list;
+    for(QJsonValue entry : array)
+        list.append(QJsonObjectToConversationMessage(entry.toObject()));
+
+    emit getMessagesCallback(true, list);
+}
+
+ConversationMessage ConversationHelper::QJsonObjectToConversationMessage(const QJsonObject &object)
+{
+    ConversationMessage message;
+    message.setID(object.value("ID").toInt());
+    message.setUserID(object.value("ID_user").toInt());
+    message.setTimeInsert(object.value("time_insert").toInt());
+    message.setMessage(object.value("message").toString());
+    message.setImagePath(object.value("image_path").toString());
+    return message;
+}

helpers/conversationhelper.h

@@ -13,6 +13,9 @@
 
 #include "../data/newconversationmessage.h"
 #include "../data/apirequest.h"
+#include "../data/conversationmessage.h"
+
+class QJsonObject;
 
 class APIHelper;
 
@@ -29,6 +32,14 @@ public:
      */
     void sendMessage(const NewConversationMessage &message);
 
+    /**
+     * Get some messages of a conversation
+     *
+     * @param conversationID The ID of the target conversation
+     * @param last_message_id The ID of the last known message (-1 for none)
+     */
+    void getMessages(int conversationID, int last_message_id = -1);
+
 signals:
 
     /**
@@ -39,6 +50,14 @@ signals:
      */
     void sendMessageCallback(bool success);
 
+    /**
+     * Get the list of messages callback
+     *
+     * @param success TRUE for a success / FALSE else
+     * @param list The list of messages
+     */
+    void getMessagesCallback(bool success, QList<ConversationMessage> list);
+
 public slots:
 
 
@@ -52,8 +71,24 @@ private slots:
      */
     void sendMessageFinished(int code);
 
+    /**
+     * Finished to retrieve the list of messages of the user
+     *
+     * @param code HTTP response code
+     * @param document Server response
+     */
+    void getMessagesFinished(int code, const QJsonDocument &document);
+
 private:
 
+    /**
+     * Turn a json object into a conversation object
+     *
+     * @param object The object to convert
+     * @return Generated object
+     */
+    static ConversationMessage QJsonObjectToConversationMessage(const QJsonObject &object);
+
     //Private fields
     APIHelper *mAPIHelper;
 };