bbcshots.js
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/*jshint strict:false*/
/*global CasperError, console, phantom, require*/
/**
* Create a mosaic image from all headline photos on BBC homepage
*/
var casper = require("casper").create();
var nbLinks = 0;
var currentLink = 1;
var images = [];
var buildPage, next;
// helper to hide some element from remote DOM
casper.hide = function(selector) {
this.evaluate(function(selector) {
document.querySelector(selector).style.display = "none";
}, selector);
};
casper.start("http://www.bbc.co.uk/", function() {
nbLinks = this.evaluate(function() {
return __utils__.findAll('#promo2_carousel_items_items li').length;
});
this.echo(nbLinks + " items founds");
// hide navigation arrows
this.hide(".nav_left");
this.hide(".nav_right");
this.mouse.move("#promo2_carousel");
});
casper.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
next = function() {
var image;
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
buildPage = function() {
var fs, pageHtml;
this.echo("Build result page");
fs = require("fs");
this.viewport(624, 400);
pageHtml = "<html><body style='background:black;margin:0;padding:0'>";
images.forEach(function(image) {
pageHtml += "<img src='file://" + fs.workingDirectory + "/" + image + "'><br>";
});
pageHtml += "</body></html>";
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();