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var _ = require('lodash');
var path = require('path');
var util = require('util');
var I18n = require('i18n-t');
var Promise = require('../../utils/promise');
var location = require('../../utils/location');
var fs = require('../../utils/fs');
var conrefsLoader = require('../conrefs');
var Output = require('../base');
var setupTemplateEnv = require('./templateEnv');
function _WebsiteOutput() {
Output.apply(this, arguments);
// Nunjucks environment
this.env;
// Plugin instance for the main theme
this.theme;
// Plugin instance for the default theme
this.defaultTheme;
// Resources loaded from plugins
this.resources;
// i18n for themes
this.i18n = new I18n();
}
util.inherits(_WebsiteOutput, Output);
var WebsiteOutput = conrefsLoader(_WebsiteOutput);
// Name of the generator
// It's being used as a prefix for templates
WebsiteOutput.prototype.name = 'website';
// Load and setup the theme
WebsiteOutput.prototype.prepare = function() {
var that = this;
return Promise()
.then(function() {
return WebsiteOutput.super_.prototype.prepare.apply(that);
})
.then(function() {
// This list is ordered to give priority to templates in the book
var searchPaths = _.pluck(that.plugins.list(), 'root');
// The book itself can contains a "_layouts" folder
searchPaths.unshift(that.book.root);
// Load i18n
_.each(searchPaths.concat().reverse(), function(searchPath) {
var i18nRoot = path.resolve(searchPath, '_i18n');
if (!fs.existsSync(i18nRoot)) return;
that.i18n.load(i18nRoot);
});
that.searchPaths = searchPaths;
})
// Copy assets from themes before copying files from book
.then(function() {
if (that.book.isLanguageBook()) return;
// Assets from the book are already copied
// Copy assets from plugins (start with default plugins)
return Promise.serie(that.plugins.list().reverse(), function(plugin) {
// Copy assets only if exists (don't fail otherwise)
var assetFolder = path.join(plugin.root, '_assets', that.name);
if (!fs.existsSync(assetFolder)) return;
that.log.debug.ln('copy assets from theme', assetFolder);
return fs.copyDir(
assetFolder,
that.resolve('gitbook'),
{
deleteFirst: false,
overwrite: true,
confirm: true
}
);
});
})
// Load resources for plugins
.then(function() {
return that.plugins.getResources(that.name)
.then(function(resources) {
that.resources = resources;
});
});
};
// Write a page (parsable file)
WebsiteOutput.prototype.onPage = function(page) {
var that = this;
// Parse the page
return page.toHTML(this)
// Render the page template with the same context as the json output
.then(function() {
return that.render('page', that.outputPath(page.path), page.getOutputContext(that));
});
};
// Finish generation, create ebook using ebook-convert
WebsiteOutput.prototype.finish = function() {
var that = this;
return Promise()
.then(function() {
return WebsiteOutput.super_.prototype.finish.apply(that);
})
// Copy assets from plugins
.then(function() {
if (that.book.isLanguageBook()) return;
return that.plugins.copyResources(that.name, that.resolve('gitbook'));
})
// Generate homepage to select languages
.then(function() {
if (!that.book.isMultilingual()) return;
return that.outputMultilingualIndex();
});
};
// ----- Utilities ----
// Write multi-languages index
WebsiteOutput.prototype.outputMultilingualIndex = function() {
var that = this;
return that.render('languages', 'index.html', that.getContext());
};
/*
Render a template as an HTML string
Templates are stored in `_layouts` folders
@param {String} tpl: template name (ex: "page")
@param {String} outputFile: filename to write, relative to the output
@param {Object} context: context for the page
@return {Promise}
*/
WebsiteOutput.prototype.renderAsString = function(tpl, context) {
// Calcul template name
var filename = this.templateName(tpl);
context = _.extend(context, {
plugins: {
resources: this.resources
},
options: this.opts
});
// Create environment
var env = setupTemplateEnv(this, context);
return Promise.nfcall(env.render.bind(env), filename, context);
};
/*
Render a template using nunjucks
Templates are stored in `_layouts` folders
@param {String} tpl: template name (ex: "page")
@param {String} outputFile: filename to write, relative to the output
@param {Object} context: context for the page
@return {Promise}
*/
WebsiteOutput.prototype.render = function(tpl, outputFile, context) {
var that = this;
// Calcul relative path to the root
var outputDirName = path.dirname(outputFile);
var basePath = location.normalize(path.relative(outputDirName, './'));
// Setup complete context
context = _.extend(context, {
basePath: basePath,
template: {
getJSContext: function() {
return {
page: _.omit(context.page, 'content'),
config: context.config,
file: context.file,
gitbook: context.gitbook,
basePath: basePath,
book: {
language: context.book.language
}
};
}
}
});
return this.renderAsString(tpl, context)
.then(function(html) {
return that.writeFile(
outputFile,
html
);
});
};
// Return a complete name for a template
WebsiteOutput.prototype.templateName = function(name) {
return path.join(this.name, name+'.html');
};
module.exports = WebsiteOutput;
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