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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");
var stringUtils = require("../../utils/string");
/*
* This generator inherits from the single page generator
* and convert the page output to ebook
*/
var Generator = function() {
BaseGenerator.apply(this, arguments);
};
util.inherits(Generator, BaseGenerator);
Generator.prototype.finish = function() {
var that = this;
return BaseGenerator.prototype.finish.apply(this)
.then(function() {
var d = Q.defer();
var format = that.options.extension || path.extname(that.options.output).replace("\.", "") || "pdf";
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,
"--title": that.options.title,
"--comments": that.options.description,
"--authors": that.options.author,
"--level1-toc": "descendant-or-self::*[contains(concat(' ', normalize-space(@class), ' '), ' book-chapter-1 ')]",
"--level2-toc": "descendant-or-self::*[contains(concat(' ', normalize-space(@class), ' '), ' book-chapter-2 ')]",
"--level3-toc": "descendant-or-self::*[contains(concat(' ', normalize-space(@class), ' '), ' book-chapter-3 ')]"
};
if (format == "pdf") {
var pdfOptions = _.defaults(that.options.pdf || {}, {
"fontSize": 12,
"toc": true,
"pageNumbers": false,
"paperSize": "a4",
"margin": {
"right": 62,
"left": 62,
"top": 36,
"bottom": 36
}
});
_.extend(_options, {
"--margin-left": String(pdfOptions.margin.left),
"--margin-right": String(pdfOptions.margin.right),
"--margin-top": String(pdfOptions.margin.top),
"--margin-bottom": String(pdfOptions.margin.bottom),
"--pdf-add-toc": Boolean(pdfOptions.toc),
"--pdf-default-font-size": String(pdfOptions.fontSize),
"--pdf-mono-font-size": String(pdfOptions.fontSize),
"--paper-size": String(pdfOptions.paperSize),
"--pdf-page-numbers": Boolean(pdfOptions.pageNumbers)
});
}
var command = [
"ebook-convert",
path.join(that.options.output, "index.html"),
path.join(that.options.output, "index."+format),
stringUtils.optionsToShellArgs(_options)
].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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