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var path = require('path');
var nunjucks = require('nunjucks');
var DoExtension = require('nunjucks-do')(nunjucks);
var JSONUtils = require('../../json');
var LocationUtils = require('../../utils/location');
var TemplateEngine = require('../../models/templateEngine');
var templatesFolder = require('../../constants/templatesFolder');
var defaultFilters = require('../../constants/defaultFilters');
var Templating = require('../../templating');
var listSearchPaths = require('./listSearchPaths');
/**
Directory for a theme with the templates
*/
function templateFolder(dir) {
return path.join(dir, templatesFolder);
}
/**
Create templating engine to render themes
@param {Output} output
@param {String} currentFile
@return {TemplateEngine}
*/
function createTemplateEngine(output, currentFile) {
var book = output.getBook();
var state = output.getState();
var i18n = state.getI18n();
var config = book.getConfig();
var summary = book.getSummary();
// Search paths for templates
var searchPaths = listSearchPaths(output);
var tplSearchPaths = searchPaths.map(templateFolder);
// Create loader
var loader = new Templating.ThemesLoader(tplSearchPaths);
// Get languages
var language = config.get('language');
return TemplateEngine.create({
loader: loader,
filters: defaultFilters.merge({
/**
Translate a sentence
*/
t: function t(s) {
return i18n.t(language, s);
},
/**
Resolve an absolute file path into a
relative path
*/
resolveFile: function(s) {
// Convert /test.png -> test.png
s = LocationUtils.toAbsolute(s, '', '');
// Convert to relative
s = LocationUtils.relative(
this.resolve('.') + '/',
this.book.resolve(name)
);
return LocationUtils.normalize(s);
},
resolveAsset: function(s) {
return s;
},
fileExists: function() {
return false;
},
contentURL: function(s) {
return s;
},
/**
Return an article by its path
*/
getArticleByPath: function(s) {
var article = summary.getByPath(s);
if (!article) return undefined;
return JSONUtils.encodeSummaryArticle(article);
}
}),
extensions: {
'DoExtension': new DoExtension()
}
});
}
module.exports = createTemplateEngine;
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