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filereader.js
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filereader.js
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var fs = require('fs'),
path = require('path'),
$ = require('sudoclass'),
jsdom = require('jsdom');
/**
* Node module that reads the script and css assets from an html file
*/
var Filereader = function(filename, pf) {
this.construct({
filename: filename,
pathfinder: pf,
script_sources: [],
scripts_parsed: false
});
$.extend(this, $.extensions.observable);
// set the full path to `html_filename`
this.set('path_to_file', pf.get('root_path') + '/' + filename);
};
Filereader.prototype = Object.create($.Model.prototype);
Filereader.prototype.concatonateSources = function() {
var i, curr, combined = '',
ary = this.get('script_sources'),
root = this.get('pathfinder').get('root_path') + '/';
for(i = 0; i < ary.length; i++) {
curr = root + ary[i];
// ensure it exists
if(fs.existsSync(curr)) {
combined += fs.readFileSync(curr, 'utf8');
}
}
this.set('concat_source', combined);
};
Filereader.prototype.parseHtmlFile = function() {
// jsdom returns a window from the parsed file
jsdom.env(this.get('file_contents'),
this._parseScriptSources.bind(this));
};
/**
* The callback supplied to `jsdom.env()`
* @private
*/
Filereader.prototype._parseScriptSources = function(errors, window) {
var i, scripts = window.document.getElementsByTagName('script'),
ary = this.get('script_sources');
for (i = 0; i < scripts.length; i++) {
// should be document order
ary.push(scripts[i].src);
}
// done with the window
window.close();
// observe this so we know when jsdom is finished
this.set('scripts_parsed', true);
};
Filereader.prototype.readHtmlFile = function() {
this.set('file_contents', fs.readFileSync(this.get('path_to_file'), 'utf8'));
};
module.exports = Filereader;