Created
January 21, 2019 00:48
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var casper = require('casper').create(); | |
var all_links = []; | |
var top_kf8_picture_books_url = "http://www.amazon.com/Best-Sellers-Kindle-Store-Text-Pop-Up-Books/zgbs/digital-text/3381090011/#" | |
var index = 1; | |
function getLinks() { | |
var links = document.querySelectorAll('.zg_itemImageImmersion a'); | |
return Array.prototype.map.call(links, function(e) { | |
return e.getAttribute('href').trim(); | |
}); | |
} | |
function logLinkElements(element, index, array) { | |
rank = index+1; | |
console.log("Rank " + rank + "=" + element); | |
} | |
function next20(index) { | |
link = top_kf8_picture_books_url +index; | |
this.echo( "Next 20 with "+ link); | |
this.thenOpen(link, function() { | |
var wait_for_text = index * 19+"."; | |
this.echo( "Begin waiting for rank" + wait_for_text + "to appear"); | |
this.waitForText(wait_for_text, function() { | |
this.echo('Found the rank.'+ wait_for_text); | |
all_links = all_links.concat(this.evaluate( getLinks )); | |
this.echo( "Ranks Collected so far"+ all_links.length ); | |
this.echo( all_links[all_links.length-1]); | |
index += 1; | |
if (all_links.length < 100 ) | |
{ | |
next20.call( this , index); | |
} | |
else | |
{ | |
this.echo(all_links.length + ' links found:'); | |
all_links.forEach( logLinkElements ); | |
this.echo('completed').exit(); | |
} | |
}); | |
this.echo(this.getTitle()); | |
}); | |
} | |
casper.start(); | |
casper.then(function() { | |
next20.call( this, index ); | |
}); | |
casper.run(); |
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