mirror of
https://github.com/TryGhost/Ghost.git
synced 2024-12-26 20:34:02 +03:00
651 lines
19 KiB
JavaScript
651 lines
19 KiB
JavaScript
var _ = require('underscore'),
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moment = require('moment'),
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downsize = require('downsize'),
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path = require('path'),
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when = require('when'),
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hbs = require('express-hbs'),
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polyglot = require('node-polyglot').instance,
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template = require('./template'),
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errors = require('../errorHandling'),
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models = require('../models'),
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filters = require('../filters'),
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packageInfo = require('../../../package.json'),
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version = packageInfo.version,
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scriptTemplate = _.template("<script src='<%= source %>?v=<%= version %>'></script>"),
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isProduction = process.env.NODE_ENV === 'production',
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api = require('../api'),
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config = require('../config'),
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coreHelpers = {},
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registerHelpers;
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/**
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* [ description]
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* @todo ghost core helpers + a way for themes to register them
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* @param {Object} context date object
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* @param {*} options
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* @return {Object} A Moment time / date object
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*/
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coreHelpers.date = function (context, options) {
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if (!options && context.hasOwnProperty('hash')) {
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options = context;
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context = undefined;
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// set to published_at by default, if it's available
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// otherwise, this will print the current date
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if (this.published_at) {
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context = this.published_at;
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}
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}
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// ensure that context is undefined, not null, as that can cause errors
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context = context === null ? undefined : context;
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var f = options.hash.format || 'MMM Do, YYYY',
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timeago = options.hash.timeago,
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date;
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if (timeago) {
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date = moment(context).fromNow();
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} else {
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date = moment(context).format(f);
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}
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return date;
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};
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//
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// ### URI Encoding helper
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//
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// *Usage example:*
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// `{{encode uri}}`
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//
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// Returns URI encoded string
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//
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coreHelpers.encode = function (context, str) {
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var uri = context || str;
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return new hbs.handlebars.SafeString(encodeURIComponent(uri));
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};
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// ### Page URL Helper
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//
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// *Usage example:*
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// `{{pageUrl 2}}`
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//
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// Returns the URL for the page specified in the current object
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// context.
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//
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coreHelpers.pageUrl = function (context, block) {
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/*jslint unparam:true*/
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return context === 1 ? '/' : ('/page/' + context + '/');
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};
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// ### URL helper
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//
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// *Usage example:*
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// `{{url}}`
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// `{{url absolute}}`
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//
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// Returns the URL for the current object context
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// i.e. If inside a post context will return post permalink
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// absolute flag outputs absolute URL, else URL is relative
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coreHelpers.url = function (options) {
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var output = '',
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self = this,
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tags = {
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year: function () { return self.created_at.getFullYear(); },
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month: function () { return self.created_at.getMonth() + 1; },
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day: function () { return self.created_at.getDate(); },
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slug: function () { return self.slug; },
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id: function () { return self.id; }
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},
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path = config.paths().path,
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isAbsolute = options && options.hash.absolute;
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return api.settings.read('permalinks').then(function (permalinks) {
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if (isAbsolute) {
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output += config().url;
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}
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if (path && path !== '/') {
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output += path;
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}
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if (models.isPost(self)) {
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output += permalinks.value;
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output = output.replace(/(:[a-z]+)/g, function (match) {
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if (_.has(tags, match.substr(1))) {
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return tags[match.substr(1)]();
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}
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});
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}
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return output;
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});
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};
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// ### Asset helper
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//
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// *Usage example:*
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// `{{asset "css/screen.css"}}`
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// `{{asset "css/screen.css" ghost="true"}}`
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//
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// Returns the path to the specified asset. The ghost
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// flag outputs the asset path for the Ghost admin
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coreHelpers.asset = function (context, options) {
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var output = '',
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subDir = config.paths().path,
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isAdmin = options && options.hash && options.hash.ghost;
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if (subDir === '/') {
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output += '/';
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} else {
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output += subDir + '/';
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}
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if (isAdmin) {
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output += 'ghost/';
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} else {
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output += 'assets/';
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}
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output += context;
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return new hbs.handlebars.SafeString(output);
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};
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// ### Author Helper
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//
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// *Usage example:*
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// `{{author}}`
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//
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// Returns the full name of the author of a given post, or a blank string
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// if the author could not be determined.
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//
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coreHelpers.author = function (context, options) {
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/*jslint unparam:true*/
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return this.author ? this.author.name : '';
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};
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// ### Tags Helper
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//
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// *Usage example:*
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// `{{tags}}`
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// `{{tags separator=' - '}}`
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//
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// Returns a string of the tags on the post.
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// By default, tags are separated by commas.
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//
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// Note that the standard {{#each tags}} implementation is unaffected by this helper
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// and can be used for more complex templates.
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coreHelpers.tags = function (options) {
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var separator = _.isString(options.hash.separator) ? options.hash.separator : ', ',
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prefix = _.isString(options.hash.prefix) ? options.hash.prefix : '',
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suffix = _.isString(options.hash.suffix) ? options.hash.suffix : '',
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output = '',
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tagNames = _.pluck(this.tags, 'name');
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if (tagNames.length) {
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output = prefix + tagNames.join(separator) + suffix;
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}
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return output;
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};
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// ### Content Helper
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//
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// *Usage example:*
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// `{{content}}`
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// `{{content words="20"}}`
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// `{{content characters="256"}}`
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//
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// Turns content html into a safestring so that the user doesn't have to
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// escape it or tell handlebars to leave it alone with a triple-brace.
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//
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// Enables tag-safe truncation of content by characters or words.
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//
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// **returns** SafeString content html, complete or truncated.
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//
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coreHelpers.content = function (options) {
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var truncateOptions = (options || {}).hash || {};
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truncateOptions = _.pick(truncateOptions, ['words', 'characters']);
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_.keys(truncateOptions).map(function (key) {
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truncateOptions[key] = parseInt(truncateOptions[key], 10);
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});
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if (truncateOptions.words || truncateOptions.characters) {
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return new hbs.handlebars.SafeString(
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downsize(this.html, truncateOptions)
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);
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}
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return new hbs.handlebars.SafeString(this.html);
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};
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// ### Excerpt Helper
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//
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// *Usage example:*
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// `{{excerpt}}`
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// `{{excerpt words="50"}}`
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// `{{excerpt characters="256"}}`
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//
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// Attempts to remove all HTML from the string, and then shortens the result according to the provided option.
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//
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// Defaults to words="50"
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//
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// **returns** SafeString truncated, HTML-free content.
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//
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coreHelpers.excerpt = function (options) {
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var truncateOptions = (options || {}).hash || {},
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excerpt;
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truncateOptions = _.pick(truncateOptions, ['words', 'characters']);
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_.keys(truncateOptions).map(function (key) {
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truncateOptions[key] = parseInt(truncateOptions[key], 10);
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});
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/*jslint regexp:true */
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excerpt = String(this.html).replace(/<\/?[^>]+>/gi, '');
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excerpt = excerpt.replace(/(\r\n|\n|\r)+/gm, ' ');
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/*jslint regexp:false */
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if (!truncateOptions.words && !truncateOptions.characters) {
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truncateOptions.words = 50;
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}
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return new hbs.handlebars.SafeString(
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downsize(excerpt, truncateOptions)
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);
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};
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// ### Filestorage helper
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//
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// *Usage example:*
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// `{{fileStorage}}`
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//
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// Returns the config value for fileStorage.
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coreHelpers.fileStorage = function (context, options) {
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/*jslint unparam:true*/
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if (config().hasOwnProperty('fileStorage')) {
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return config().fileStorage.toString();
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}
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return "true";
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};
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coreHelpers.ghostScriptTags = function () {
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var scriptFiles = [],
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webroot = config.paths().webroot;
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if (isProduction) {
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scriptFiles.push("ghost.min.js");
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} else {
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scriptFiles = [
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'vendor.js',
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'helpers.js',
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'templates.js',
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'models.js',
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'views.js'
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];
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}
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scriptFiles = _.map(scriptFiles, function (fileName) {
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return scriptTemplate({
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source: webroot + '/built/scripts/' + fileName,
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version: version
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});
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});
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return scriptFiles.join('');
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};
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/*
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* Asynchronous Theme Helpers (Registered with registerAsyncThemeHelper)
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*/
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coreHelpers.body_class = function (options) {
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/*jslint unparam:true*/
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var classes = [],
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tags = this.post && this.post.tags ? this.post.tags : this.tags || [],
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page = this.post && this.post.page ? this.post.page : this.page || false;
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if (_.isString(this.ghostRoot) && this.ghostRoot.match(/\/page/)) {
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classes.push('archive-template');
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} else if (!this.ghostRoot || this.ghostRoot === '/' || this.ghostRoot === '') {
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classes.push('home-template');
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} else {
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classes.push('post-template');
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}
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if (tags) {
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classes = classes.concat(tags.map(function (tag) { return 'tag-' + tag.slug; }));
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}
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if (page) {
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classes.push('page');
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}
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return filters.doFilter('body_class', classes).then(function (classes) {
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var classString = _.reduce(classes, function (memo, item) { return memo + ' ' + item; }, '');
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return new hbs.handlebars.SafeString(classString.trim());
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});
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};
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coreHelpers.post_class = function (options) {
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/*jslint unparam:true*/
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var classes = ['post'],
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tags = this.post && this.post.tags ? this.post.tags : this.tags || [],
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featured = this.post && this.post.featured ? this.post.featured : this.featured || false,
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page = this.post && this.post.page ? this.post.page : this.page || false;
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if (tags) {
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classes = classes.concat(tags.map(function (tag) { return 'tag-' + tag.slug; }));
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}
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if (featured) {
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classes.push('featured');
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}
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if (page) {
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classes.push('page');
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}
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return filters.doFilter('post_class', classes).then(function (classes) {
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var classString = _.reduce(classes, function (memo, item) { return memo + ' ' + item; }, '');
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return new hbs.handlebars.SafeString(classString.trim());
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});
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};
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coreHelpers.ghost_head = function (options) {
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/*jslint unparam:true*/
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var blog = config.theme(),
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root = config.paths().webroot,
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head = [],
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majorMinor = /^(\d+\.)?(\d+)/,
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trimmedVersion = this.version;
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trimmedVersion = trimmedVersion ? trimmedVersion.match(majorMinor)[0] : '?';
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head.push('<meta name="generator" content="Ghost ' + trimmedVersion + '" />');
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head.push('<link rel="alternate" type="application/rss+xml" title="' + _.escape(blog.title) + '" href="' + root + '/rss/' + '">');
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if (this.ghostRoot) {
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head.push('<link rel="canonical" href="' + config().url + this.ghostRoot + '" />');
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}
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return filters.doFilter('ghost_head', head).then(function (head) {
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var headString = _.reduce(head, function (memo, item) { return memo + '\n' + item; }, '');
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return new hbs.handlebars.SafeString(headString.trim());
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});
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};
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coreHelpers.ghost_foot = function (options) {
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/*jslint unparam:true*/
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var foot = [];
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foot.push('<script src="' + config().url + '/shared/vendor/jquery/jquery.js"></script>');
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return filters.doFilter('ghost_foot', foot).then(function (foot) {
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var footString = _.reduce(foot, function (memo, item) { return memo + ' ' + item; }, '');
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return new hbs.handlebars.SafeString(footString.trim());
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});
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};
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coreHelpers.meta_title = function (options) {
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/*jslint unparam:true*/
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var title,
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blog;
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if (_.isString(this.ghostRoot)) {
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if (!this.ghostRoot || this.ghostRoot === '/' || this.ghostRoot === '' || this.ghostRoot.match(/\/page/)) {
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blog = config.theme();
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title = blog.title;
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} else {
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title = this.post.title;
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}
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}
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return filters.doFilter('meta_title', title).then(function (title) {
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title = title || "";
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return new hbs.handlebars.SafeString(title.trim());
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});
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};
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coreHelpers.meta_description = function (options) {
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/*jslint unparam:true*/
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var description,
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blog;
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if (_.isString(this.ghostRoot)) {
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if (!this.ghostRoot || this.ghostRoot === '/' || this.ghostRoot === '' || this.ghostRoot.match(/\/page/)) {
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blog = config.theme();
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description = blog.description;
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} else {
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description = '';
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}
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}
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return filters.doFilter('meta_description', description).then(function (description) {
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description = description || "";
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return new hbs.handlebars.SafeString(description.trim());
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});
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};
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/**
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* Localised string helpers
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*
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* @param String key
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* @param String default translation
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* @param {Object} options
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* @return String A correctly internationalised string
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*/
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coreHelpers.e = function (key, defaultString, options) {
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var output;
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when.all([
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api.settings.read('defaultLang'),
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api.settings.read('forceI18n')
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]).then(function (values) {
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if (values[0].value === 'en'
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&& _.isEmpty(options.hash)
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&& _.isEmpty(values[1].value)) {
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output = defaultString;
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} else {
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output = polyglot().t(key, options.hash);
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}
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return output;
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});
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};
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coreHelpers.foreach = function (context, options) {
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var fn = options.fn,
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inverse = options.inverse,
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i = 0,
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j = 0,
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columns = options.hash.columns,
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key,
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ret = "",
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data;
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if (options.data) {
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data = hbs.handlebars.createFrame(options.data);
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}
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function setKeys(_data, _i, _j, _columns) {
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if (_i === 0) {
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_data.first = true;
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}
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if (_i === _j - 1) {
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_data.last = true;
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}
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// first post is index zero but still needs to be odd
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if (_i % 2 === 1) {
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_data.even = true;
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} else {
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_data.odd = true;
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}
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if (_i % _columns === 0) {
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_data.rowStart = true;
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} else if (_i % _columns === (_columns - 1)) {
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_data.rowEnd = true;
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}
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return _data;
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}
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if (context && typeof context === 'object') {
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if (context instanceof Array) {
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for (j = context.length; i < j; i += 1) {
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if (data) {
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data.index = i;
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data.first = data.rowEnd = data.rowStart = data.last = data.even = data.odd = false;
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data = setKeys(data, i, j, columns);
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}
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ret = ret + fn(context[i], { data: data });
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}
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} else {
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for (key in context) {
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if (context.hasOwnProperty(key)) {
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j += 1;
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}
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}
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for (key in context) {
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if (context.hasOwnProperty(key)) {
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if (data) {
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data.key = key;
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data.first = data.rowEnd = data.rowStart = data.last = data.even = data.odd = false;
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data = setKeys(data, i, j, columns);
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}
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ret = ret + fn(context[key], {data: data});
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i += 1;
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}
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}
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}
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}
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if (i === 0) {
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ret = inverse(this);
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}
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return ret;
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};
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// ### Pagination Helper
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// `{{pagination}}`
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// Outputs previous and next buttons, along with info about the current page
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coreHelpers.pagination = function (options) {
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/*jslint unparam:true*/
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if (!_.isObject(this.pagination) || _.isFunction(this.pagination)) {
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errors.logAndThrowError('pagination data is not an object or is a function');
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return;
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}
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if (_.isUndefined(this.pagination.page) || _.isUndefined(this.pagination.pages)
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|| _.isUndefined(this.pagination.total) || _.isUndefined(this.pagination.limit)) {
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errors.logAndThrowError('All values must be defined for page, pages, limit and total');
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return;
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}
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if ((!_.isUndefined(this.pagination.next) && !_.isNumber(this.pagination.next))
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|| (!_.isUndefined(this.pagination.prev) && !_.isNumber(this.pagination.prev))) {
|
|
errors.logAndThrowError('Invalid value, Next/Prev must be a number');
|
|
return;
|
|
}
|
|
if (!_.isNumber(this.pagination.page) || !_.isNumber(this.pagination.pages)
|
|
|| !_.isNumber(this.pagination.total) || !_.isNumber(this.pagination.limit)) {
|
|
errors.logAndThrowError('Invalid value, check page, pages, limit and total are numbers');
|
|
return;
|
|
}
|
|
return template.execute('pagination', this.pagination);
|
|
};
|
|
|
|
coreHelpers.helperMissing = function (arg) {
|
|
if (arguments.length === 2) {
|
|
return undefined;
|
|
}
|
|
errors.logError('Missing helper: "' + arg + '"');
|
|
};
|
|
|
|
// Register an async handlebars helper for a given handlebars instance
|
|
function registerAsyncHelper(hbs, name, fn) {
|
|
hbs.registerAsyncHelper(name, function (options, cb) {
|
|
// Wrap the function passed in with a when.resolve so it can
|
|
// return either a promise or a value
|
|
when.resolve(fn.call(this, options)).then(function (result) {
|
|
cb(result);
|
|
}).otherwise(function (err) {
|
|
errors.logAndThrowError(err, "registerAsyncThemeHelper: " + name);
|
|
});
|
|
});
|
|
}
|
|
|
|
|
|
// Register a handlebars helper for themes
|
|
function registerThemeHelper(name, fn) {
|
|
hbs.registerHelper(name, fn);
|
|
}
|
|
|
|
// Register an async handlebars helper for themes
|
|
function registerAsyncThemeHelper(name, fn) {
|
|
registerAsyncHelper(hbs, name, fn);
|
|
}
|
|
|
|
// Register a handlebars helper for admin
|
|
function registerAdminHelper(name, fn) {
|
|
coreHelpers.adminHbs.registerHelper(name, fn);
|
|
}
|
|
|
|
// Register an async handlebars helper for admin
|
|
function registerAsyncAdminHelper(name, fn) {
|
|
registerAsyncHelper(coreHelpers.adminHbs, name, fn);
|
|
}
|
|
|
|
|
|
|
|
registerHelpers = function (adminHbs) {
|
|
|
|
// Expose hbs instance for admin
|
|
coreHelpers.adminHbs = adminHbs;
|
|
|
|
|
|
// Register theme helpers
|
|
registerThemeHelper('asset', coreHelpers.asset);
|
|
|
|
registerThemeHelper('author', coreHelpers.author);
|
|
|
|
registerThemeHelper('content', coreHelpers.content);
|
|
|
|
registerThemeHelper('date', coreHelpers.date);
|
|
|
|
registerThemeHelper('encode', coreHelpers.encode);
|
|
|
|
registerThemeHelper('excerpt', coreHelpers.excerpt);
|
|
|
|
registerThemeHelper('foreach', coreHelpers.foreach);
|
|
|
|
registerThemeHelper('pageUrl', coreHelpers.pageUrl);
|
|
|
|
registerThemeHelper('pagination', coreHelpers.pagination);
|
|
|
|
registerThemeHelper('tags', coreHelpers.tags);
|
|
|
|
registerAsyncThemeHelper('body_class', coreHelpers.body_class);
|
|
|
|
registerAsyncThemeHelper('e', coreHelpers.e);
|
|
|
|
registerAsyncThemeHelper('ghost_foot', coreHelpers.ghost_foot);
|
|
|
|
registerAsyncThemeHelper('ghost_head', coreHelpers.ghost_head);
|
|
|
|
registerAsyncThemeHelper('meta_description', coreHelpers.meta_description);
|
|
|
|
registerAsyncThemeHelper('meta_title', coreHelpers.meta_title);
|
|
|
|
registerAsyncThemeHelper('post_class', coreHelpers.post_class);
|
|
|
|
registerAsyncThemeHelper('url', coreHelpers.url);
|
|
|
|
|
|
// Register admin helpers
|
|
registerAdminHelper('asset', coreHelpers.asset);
|
|
|
|
registerAdminHelper('ghostScriptTags', coreHelpers.ghostScriptTags);
|
|
|
|
registerAdminHelper('fileStorage', coreHelpers.fileStorage);
|
|
|
|
registerAsyncAdminHelper('url', coreHelpers.url);
|
|
|
|
};
|
|
|
|
module.exports = coreHelpers;
|
|
module.exports.loadCoreHelpers = registerHelpers;
|
|
module.exports.registerThemeHelper = registerThemeHelper;
|
|
module.exports.registerAsyncThemeHelper = registerAsyncThemeHelper;
|