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var _ = require('lodash');
var path = require('path');
var util = require('util');
var nunjucks = require('nunjucks');
var Promise = require('../utils/promise');
var conrefsLoader = require('./conrefs');
var Output = require('./base');
// Tranform a theme ID into a plugin
function themeID(plugin) {
return 'theme-' + plugin;
}
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;
}
util.inherits(WebsiteOutput, Output);
// 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() {
var themeName = that.book.config.get('theme');
that.theme = that.plugins.get(themeID(themeName));
that.themeDefault = that.plugins.get(themeID('default'));
if (!that.theme) {
throw new Error('Theme "' + themeName + '" is not installed, add "' + themeID(themeName) + '" to your "book.json"');
}
var searchPaths = _.chain([
// The book itself can contains a "_layouts" folder
that.book.root,
// Installed plugin (it can be identical to themeDefault.root)
that.theme.root,
// Is default theme still installed
that.themeDefault? that.themeDefault.root : null
])
.compact()
.uniq()
.value();
that.env = new nunjucks.Environment(new nunjucks.FileSystemLoader(searchPaths));
});
};
// Write a page (parsable file)
WebsiteOutput.prototype.onPage = function(page) {
var that = this;
// Render the page template with the same context as the json output
return this.render('page', this.getPageContext(page))
// Write the HTML file
.then(function(html) {
return that.writeFile(
page.withExtension('.html'),
html
);
});
};
// ----- Utilities ----
// Render a template using nunjucks
// Templates are stored in `_layouts` folders
WebsiteOutput.prototype.render = function(tpl, context) {
return Promise.nfcall(this.env.render.bind(this.env), this.templateName(tpl), context);
};
// Return a complete name for a template
WebsiteOutput.prototype.templateName = function(name) {
return path.join('_layouts', this.name, name+'.html');
};
module.exports = conrefsLoader(WebsiteOutput);
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