/**
* Create a mosaic image from all headline photos on BBC homepage
*
*/
var casper = require('casper').create(),
nbLinks = 0,
currentLink = 1,
images = [];
// helper to hide some element from remote DOM
casper.hide = function(selector) {
this.evaluate(function(selector) {
document.querySelector(selector).style.display = "none";
}, { selector: selector });
};
casper.start('http://www.bbc.co.uk/', function() {
nbLinks = this.evaluate(function() {
return __utils__.findAll('#carousel_items_items li').length;
});
this.echo(nbLinks + ' items founds');
// hide navigation arrows
this.hide('.nav_left');
this.hide('.nav_right');
this.mouse.move('#promo_carousel');
this.waitUntilVisible('.autoplay.nav_pause', function() {
this.echo('Moving over pause button');
this.mouse.move('.autoplay.nav_pause');
this.click('.autoplay.nav_pause');
this.echo('Clicked on pause button');
this.waitUntilVisible('.autoplay.nav_play', function() {
this.echo('Carousel has been paused');
// hide play button
this.hide('.autoplay');
});
});
});
// Capture carrousel area
var next = function() {
var image = 'bbcshot' + currentLink + '.png';
images.push(image);
this.echo('Processing image ' + currentLink);
this.captureSelector(image, '.carousel_viewport');
if (currentLink < nbLinks) {
this.click('.carousel_itemList_li[rel="' + currentLink + '"]');
this.wait(1000, function() {
this.then(next);
currentLink++;
});
} else {
this.then(buildPage);
}
};
// Building resulting page and image
var buildPage = function() {
this.echo('Build result page');
var fs = require('fs');
this.viewport(624, 400);
var pageHtml = "";
images.forEach(function(image) {
pageHtml += '
';
});
pageHtml += "";
fs.write('result.html', pageHtml, 'w');
this.thenOpen('file://' + fs.workingDirectory + '/result.html', function() {
this.echo('Resulting image saved to result.png');
this.capture('result.png');
});
};
casper.then(next);
casper.run();