Ticket #12983: SelectionWindow.cpp

/*
 * Copyright 2015 Przemysław Buczkowski <przemub@przemub.pl>
 * Copyright 2014 George White
 * All rights reserved. Distributed under the terms of the MIT license.
 */

#include <Button.h>
#include <Catalog.h>

#include <ControlLook.h>
#include <GroupLayout.h>
#include <GroupView.h>
#include <ListView.h>
#include <StringView.h>
#include <Url.h>
#include <UrlProtocolRoster.h>
#include <UrlRequest.h>
#include <Window.h>

#include "CitiesListSelectionWindow.h"
#include "MainWindow.h"
#include "NetListener.h"
#include "SelectionWindow.h"

#undef B_TRANSLATION_CONTEXT
#define B_TRANSLATION_CONTEXT "SelectionWindow"

SelectionWindow::SelectionWindow(BRect rect, MainWindow* parent, BString city,
    BString cityId)
    :
    BWindow(rect, B_TRANSLATE("Change location"), B_TITLED_WINDOW,
        B_NOT_ZOOMABLE | B_ASYNCHRONOUS_CONTROLS | B_CLOSE_ON_ESCAPE
        | B_AUTO_UPDATE_SIZE_LIMITS),
        fDownloadThread(-1)
 {
    fParent = parent;
    fCity = city;
    fCityId = cityId;

    BGroupLayout *root = new BGroupLayout(B_VERTICAL);
    this->SetLayout(root);
    
    BGroupView *view = new BGroupView(B_HORIZONTAL);
    BGroupLayout *layout = view->GroupLayout();

    static const float spacing = be_control_look->DefaultItemSpacing();
    layout->SetInsets(spacing / 2);
    this->AddChild(view);
    
    fCityControl = new BTextControl(NULL, B_TRANSLATE("City:"), fCity, NULL);
    fCityControl->SetToolTip(B_TRANSLATE("Select city: city, country, region"));

    layout->AddView(fCityControl);
    BButton* button;
    layout->AddView(button = new BButton("search", B_TRANSLATE("OK"),
        new BMessage(kSearchMessage)));
    fCityControl->MakeFocus(true);
    button->MakeDefault(true);
}


void
SelectionWindow::MessageReceived(BMessage *msg)
{
    switch (msg->what) {
    case kSearchMessage:
        _StartSearch();
        Hide();
        break;
    case kCitiesListMessage: {
        BRect frame(Frame().LeftTop(),BSize(400,200));
        frame.OffsetBy(30,30);
        (new CitiesListSelectionWindow(frame, fParent, msg))->Show();
        break;
        }
    case kDataMessage:
        msg->FindString("id", &fCityId);
        _UpdateCity();
        QuitRequested();
        Close();
        break;
    case kFailureMessage:
        // TODO add a message to the window
        Show();
        break;
    default:
        BWindow::MessageReceived(msg);
    }
}


bool
SelectionWindow::QuitRequested()
{
    BMessenger messenger(fParent);
    BMessage* message = new BMessage(kCloseCitySelectionWindowMessage);
    messenger.SendMessage(message);
    return true;
}


void
SelectionWindow::_UpdateCity()
{
    BMessenger messenger(fParent);
    BMessage* message = new BMessage(kUpdateCityMessage);
    
    message->AddString("city", fCityControl->Text());
    message->AddString("id", fCityId);
    
    messenger.SendMessage(message);
}


void
SelectionWindow::_StartSearch()
{
    _StopSearch();

    fDownloadThread = spawn_thread(&_FindIdFunc,
        "Download Data", B_NORMAL_PRIORITY, this);
    if (fDownloadThread >= 0)
        resume_thread(fDownloadThread);
}


void
SelectionWindow::_StopSearch()
{
    if (fDownloadThread < 0)
        return;
    wait_for_thread(fDownloadThread, NULL);
    fDownloadThread = -1;
}


int32
SelectionWindow::_FindIdFunc(void *cookie)
{
    SelectionWindow* selectionWindow = static_cast<SelectionWindow*>(cookie);
    selectionWindow->_FindId();
    return 0;
}


void
SelectionWindow::_FindId()
{
    BString urlString("https://query.yahooapis.com/v1/public/yql");
    urlString << "?q=select+%20*%20+from+geo.places+"
        << "where+text+=%22" << fCityControl->Text() << "%22%20and%20placeTypeName%3D%22Town%22&format=json";
    urlString.ReplaceAll(" ", "+");
    urlString.ReplaceAll("\\", "%5C");  // Filter out characters that trip up BUrl
        
    NetListener listener(this, CITY_REQUEST);
    BUrlRequest* request =
        BUrlProtocolRoster::MakeRequest(BUrl(urlString.String()),
        &listener);

    thread_id thread = request->Run();
    wait_for_thread(thread, NULL);
    delete request;
}