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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("../utils/fs");
var stringUtils = require("../utils/string");
var BaseGenerator = require("./website");
var Generator = function(book, format) {
BaseGenerator.apply(this, arguments);
// eBook format
this.ebookFormat = format;
// Styles to use
this.styles = _.compact(["ebook", this.ebookFormat]);
// Convert images (svg -> png)
this.convertImages = true;
};
util.inherits(Generator, BaseGenerator);
Generator.prototype.prepareTemplates = function() {
this.templates["page"] = this.book.plugins.template("ebook:page") || path.resolve(this.options.theme, 'templates/ebook/page.html');
this.templates["summary"] = this.book.plugins.template("ebook:summary") || path.resolve(this.options.theme, 'templates/ebook/summary.html');
this.templates["glossary"] = this.book.plugins.template("ebook:glossary") || path.resolve(this.options.theme, 'templates/ebook/glossary.html');
return Q();
};
// Generate table of contents
Generator.prototype.writeSummary = function() {
var that = this;
that.book.log.info.ln("write SUMMARY.html");
return this._writeTemplate(this.templates["summary"], {}, path.join(this.options.output, "SUMMARY.html"));
};
Generator.prototype.langsIndex = function(langs) {
return Q();
};
Generator.prototype.finish = function() {
var that = this;
return BaseGenerator.prototype.finish.apply(this)
.then(function() {
return that.writeSummary();
})
.then(function() {
if (!that.ebookFormat) return Q();
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,
"--title": that.options.title,
"--comments": that.options.description,
"--isbn": that.options.isbn,
"--authors": that.options.author,
"--publisher": "GitBook",
"--chapter": "descendant-or-self::*[contains(concat(' ', normalize-space(@class), ' '), ' book-chapter ')]",
"--chapter-mark": "pagebreak",
"--page-breaks-before": "/",
"--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 ')]",
"--no-chapters-in-toc": true,
"--max-levels": "1",
"--breadth-first": true
};
if (that.ebookFormat == "pdf") {
var pdfOptions = that.options.pdf;
_.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-default-font-size": String(pdfOptions.fontSize),
"--pdf-mono-font-size": String(pdfOptions.fontSize),
"--paper-size": String(pdfOptions.paperSize),
"--pdf-page-numbers": Boolean(pdfOptions.pageNumbers),
"--pdf-header-template": String(pdfOptions.headerTemplate),
"--pdf-footer-template": String(pdfOptions.footerTemplate)
});
}
var command = [
"ebook-convert",
path.join(that.options.output, "SUMMARY.html"),
path.join(that.options.output, "index."+that.ebookFormat),
stringUtils.optionsToShellArgs(_options)
].join(" ");
that.book.log.info("start conversion to", that.ebookFormat, "....");
var child = exec(command, function (error, stdout, stderr) {
if (error) {
that.book.log.info.fail();
if (error.code == 127) {
error.message = "Need to install ebook-convert from Calibre";
} else {
error.message = error.message + " "+stdout;
}
return d.reject(error);
}
that.book.log.info.ok();
d.resolve();
});
child.stdout.on('data', function (data) {
that.book.log.debug(data);
});
child.stderr.on('data', function (data) {
that.book.log.debug(data);
});
return d.promise;
});
};
module.exports = Generator;
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