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var util = require("util");
var path = require("path");
var Q = require("q");
var _ = require("lodash");
var exec = require('child_process').exec;
var fs = require("fs");
var parse = require("../../parse");
var BaseGenerator = require("../page");
/*
* This generator inherits from the single page generator
* and convert the page output to ebook
*/
var Generator = function() {
BaseGenerator.apply(this, arguments);
// Options for eBook generation
this.options = _.defaults(this.options, {
extension: "epub"
});
};
util.inherits(Generator, BaseGenerator);
Generator.prototype.finish = function() {
var that = this;
return BaseGenerator.prototype.finish.apply(this)
.then(function() {
var d = Q.defer();
if (!that.options.cover && fs.existsSync(path.join(that.options.output, "cover.jpg"))) {
that.options.cover = path.join(that.options.output, "cover.jpg");
}
var _options = {
"--cover": that.options.cover
};
var command = [
"ebook-convert",
path.join(that.options.output, "index.html"),
path.join(that.options.output, "index."+that.options.extension),
_.chain(_options)
.map(function(value, key) {
if (value == null) return null;
return key+"="+value;
})
.compact()
.value()
.join(" ")
].join(" ");
exec(command, function (error, stdout, stderr) {
if (error) {
if (error.code == 127) {
error.message = "Need to install ebook-convert from Calibre";
} else {
error.message = error.message + " "+stdout;
}
return d.reject(error);
}
d.resolve();
});
return d.promise;
});
};
module.exports = Generator;
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