Twitter search by JSON respond

Muhammad

Hello every body
I'm learning how to do a simple twitter search using JSON as respond,every thing works just fine, except that the text of the tweet doesn't appear.

Here's the code

connector.h
@#ifndef CONNECTOR_H
#define CONNECTOR_H
#include <QNetworkAccessManager>
#include <QObject>

class connector : public QObject
{
Q_OBJECT
public:
explicit connector(QObject *parent = 0);
Q_INVOKABLE void search(QString query);
signals:
void searchSignal(QString jsonSearch);
public slots:
void searchResultGot();
private:
QNetworkAccessManager *nm;
};

#endif // CONNECTOR_H
@

connector.cpp
@#include "connector.h"
#include<QNetworkReply>
#include<QNetworkRequest>
#include<QDebug>
connector::connector(QObject *parent) :
QObject(parent)
{
nm = new QNetworkAccessManager(this);
}

void connector::search(QString query)
{
QString request = "http://search.twitter.com/search.json?from=";
request.append(query);
QNetworkReply *rep = nm->get(QNetworkRequest(request));
connect(rep,SIGNAL(finished()),this,SLOT(searchResultGot()));
}

void connector::searchResultGot()
{
QNetworkReply *rep = qobject_cast<QNetworkReply *>(sender());
if(rep->error() == QNetworkReply::NoError)
{
QByteArray bytes = rep->readAll();
emit searchSignal(QString(bytes));
}
else {
qDebug()<<"Baso!,Erro while downloading Data"<<rep->errorString();
}
}
@

main.cpp
@#include"connector.h"
#include<QDeclarativeView>
#include<Qdeclarative.h>
#include<QApplication>
int main (int argc, char**argv)
{
QApplication app(argc,argv);
QDeclarativeView view;
qmlRegisterType<connector>("Module",1,0,"Connector");
view.setSource(QString("main.qml"));
view.show();
return app.exec();
}
@

LineEdit.qml
@// import QtQuick 1.0 // to target S60 5th Edition or Maemo 5
import QtQuick 1.1

Rectangle {
id: wrapper
property alias text: input.text
width: 300; height: 40;
y: 10; radius: 25; border {color: 'black'; width: 1} smooth: true
TextInput {
focus: true
id: input
anchors.centerIn: parent
width: parent.width - 50
}
Text {
visible: input.text == ''; color: 'gray'
text: 'enter text'; anchors.verticalCenter: parent.verticalCenter
x: 25
}
}
@

main.qml
@// import QtQuick 1.0 // to target S60 5th Edition or Maemo 5
import QtQuick 1.1
import Module 1.0
Item {
id: root
width: 360; height: 640
Connector{
id:myConnector

    onSearchSignal: {
        var jsonObj = JSON.parse(jsonSearch)
        var tweetsArray = jsonObj.results
        var array = Array
        var array2 = Array
        for(var i = 0; i < tweetsArray.length; i++){
            tweetsModel.append(tweetsArray[i])
        }
    }
}
LineEdit {
    focus: true
    id: searchInput
    anchors.top: parent.top; anchors.left: parent.left; anchors.leftMargin: 15
    width: 240
}
Rectangle {
    id: searchButton
    width: 80; height: 40; color: 'lightBlue'; radius: 15
    anchors {top: parent.top; right: parent.right; rightMargin: 15}
    MouseArea {
        anchors.fill: parent
        onClicked: {
            if(searchInput.text != ''){
                myConnector.search(searchInput.text)
                tweetsModel.clear() // to handle a search after another one
            }
        }
    }
    Text{
        anchors.centerIn: parent; text: 'search'
    }
}
ListModel {
    id: tweetsModel
}
ListView{
    width: parent.width; anchors.top: searchButton.bottom; anchors.topMargin: 25; anchors.bottom: parent.bottom
    model: tweetsModel; clip: true; cacheBuffer: 1200
    delegate: Rectangle{
        id: thum
        color: "lightgray"
        border.color: "black"; border.width: 1
        radius: 20
        width: parent.width-1
        height: 80
        Image {
            id: profilePic
            source: profile_image_url
            anchors{/*left: parent.left;*/ verticalCenter: parent.verticalCenter; leftMargin: 10; horizontalCenter: textname.horizontalCenter}
            smooth: true
        }
        Text {
            id: textname
            anchors{top: parent.top; bottom: profilePic.top; left: parent.left; leftMargin: 15}
            text: qsTr(from_user_name)
        }
        Text {
            id: texttweet
            anchors{left: profilePic.right; verticalCenter: profilePic.verticalCenter; leftMargin: 15}
            text: qsTr(text)
            color: "blue"
        }
    }
}

}
@

deimos

hi Baso,

I think that your query doesn't work. I tryed that but always had 0 results, so no output.

Instead of

bq. QString request = "http://search.twitter.com/search.json?from=";

try with

bq. QString request = "http://search.twitter.com/search.json?q=";

Marco

Muhammad

marcoB
Thanks for reply, but the app is not to search for persons on twitter, it's about getting the tweet of a specific person.
What I want to do is to write the twitter name of someone and click search, and the app displays the last 15 tweets of that person, So I think the query is write because I get the profile pic of the name on the search, but not the tweets that's it.
any tip about how to get that tweets from the JSON.
Thanks

deimos

I tryed your source and the workflow does the job. Whats wrong is the twitter query you are using. With that jsonObj.results will be always empty. I never used twitter APIs, but you can find docs about getting user tweets "here":https://dev.twitter.com/docs/api/1/get/statuses/user_timeline.

I think you shoud use something like:

bq. QString request = "http://api.twitter.com/1/statuses/user_timeline.json?count=5&screen_name=";

in your search() function, but the json structure is different, so no jsonObj.results
To better undestand how is structured your query result and manage your code, try to use your browser and point it to

bq. http://api.twitter.com/1/statuses/user_timeline.xml?count=5&screen_name=<USER>

here I used xml instead of json because for example in my browser, the xml format is formatted and more readable.

hope this helps

Muhammad

I'v used your query and made the required changes, but the same here I get the profile pic and the user name, but not the text of the tweet
But this time I got error here's it

@Error: qsTr(): first argument (text) must be a string@

I don't know why it can't see the text as a string, may be it's about coding or something!, I don't know.
And about the XML , I know XML much easier, but I wanna do it in JSON.
Thanks :)

tomma

Your first version does work. Problem is main.qml:70: text: qsTr(text)
You are trying to set Text element property text to text which loops back to same property.
change it to: tweetsModel.get(index).text

Also I see no reason to use qsTr() for strings which get from network request.

Muhammad

Tomma, Thank you, this really fixed the problem
Thank you