mirror of
https://github.com/TryGhost/Ghost.git
synced 2024-12-01 22:02:11 +03:00
468 lines
16 KiB
JavaScript
468 lines
16 KiB
JavaScript
var _ = require('underscore'),
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moment = require('moment'),
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downsize = require('downsize'),
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when = require('when'),
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hbs = require('express-hbs'),
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packageInfo = require('../../../package.json'),
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errors = require('../errorHandling'),
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models = require('../models'),
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coreHelpers;
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coreHelpers = function (ghost) {
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var paginationHelper,
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scriptTemplate = _.template("<script src='/built/scripts/<%= name %>?v=<%= version %>'></script>"),
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isProduction = process.env.NODE_ENV === 'production',
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version = encodeURIComponent(packageInfo.version);
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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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ghost.registerThemeHelper('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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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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ghost.registerThemeHelper('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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ghost.registerThemeHelper('pageUrl', function (context, block) {
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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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ghost.registerThemeHelper('url', function (options) {
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var output = '';
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if (options && options.hash.absolute) {
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output += ghost.config().url;
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}
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if (models.isPost(this)) {
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output += '/' + this.slug + '/';
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}
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return 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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ghost.registerThemeHelper('author', function (context, options) {
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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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ghost.registerThemeHelper('tags', function (options) {
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var separator = ', ',
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tagNames;
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if (typeof options.hash.separator === 'string') {
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separator = options.hash.separator;
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}
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tagNames = _.pluck(this.tags, 'name');
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return tagNames.join(separator);
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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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ghost.registerThemeHelper('content', function (options) {
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var truncateOptions = (options || {}).hash || {};
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truncateOptions = _.pick(truncateOptions, ['words', 'characters']);
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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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ghost.registerThemeHelper('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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/*jslint regexp:true */
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excerpt = String(this.html).replace(/<\/?[^>]+>/gi, '');
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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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ghost.registerThemeHelper('fileStorage', function (context, options) {
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if (ghost.config().hasOwnProperty('fileStorage')) {
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return ghost.config().fileStorage.toString();
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}
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return "true";
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});
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ghost.registerThemeHelper('body_class', function (options) {
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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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if (_.isString(this.path) && this.path.match(/\/page/)) {
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classes.push('archive-template');
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} else if (!this.path || this.path === '/' || this.path === '') {
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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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return ghost.doFilter('body_class', classes, 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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ghost.registerThemeHelper('post_class', function (options) {
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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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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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return ghost.doFilter('post_class', classes, 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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ghost.registerThemeHelper('ghost_head', function (options) {
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var head = [],
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majorMinor = /^(\d+\.)?(\d+)/,
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trimmedVersion = this.version.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="RSS" href="/rss/">');
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return ghost.doFilter('ghost_head', head, 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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ghost.registerThemeHelper('meta_title', function (options) {
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var title, blog;
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blog = ghost.blogGlobals();
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if (_.isString(this.path)) {
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if (!this.path || this.path === '/' || this.path === '' || this.path.match(/\/page/)) {
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blog = ghost.blogGlobals();
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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 ghost.doFilter('meta_title', title, function (title) {
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return new hbs.handlebars.SafeString(title.trim());
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});
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});
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ghost.registerThemeHelper('meta_description', function (options) {
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var description, blog;
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blog = ghost.blogGlobals();
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if (_.isString(this.path)) {
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if (!this.path || this.path === '/' || this.path === '' || this.path.match(/\/page/)) {
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blog = ghost.blogGlobals();
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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 ghost.doFilter('meta_description', description, function (description) {
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return new hbs.handlebars.SafeString(description.trim());
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});
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});
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ghost.registerThemeHelper('ghost_foot', function (options) {
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var foot = [];
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foot.push('<script src="/shared/vendor/jquery/jquery.js"></script>');
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return ghost.doFilter('ghost_foot', foot, 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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/**
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* [ description]
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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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ghost.registerThemeHelper('e', function (key, defaultString, options) {
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var output;
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if (ghost.settings('defaultLang') === 'en' && _.isEmpty(options.hash) && !ghost.settings('forceI18n')) {
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output = defaultString;
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} else {
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output = ghost.polyglot().t(key, options.hash);
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}
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return output;
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});
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ghost.registerThemeHelper('json', function (object, options) {
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return JSON.stringify(object);
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});
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ghost.registerThemeHelper('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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// A helper for inserting the javascript tags with version hashes
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ghost.registerThemeHelper('ghostScriptTags', function () {
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var scriptFiles = [];
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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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name: 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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// ## Template driven helpers
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// Template driven helpers require that their template is loaded before they can be registered.
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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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paginationHelper = ghost.loadTemplate('pagination').then(function (templateFn) {
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ghost.registerThemeHelper('pagination', function (options) {
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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))) {
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errors.logAndThrowError('Invalid value, Next/Prev must be a number');
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return;
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}
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if (!_.isNumber(this.pagination.page) || !_.isNumber(this.pagination.pages)
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|| !_.isNumber(this.pagination.total) || !_.isNumber(this.pagination.limit)) {
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errors.logAndThrowError('Invalid value, check page, pages, limit and total are numbers');
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return;
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}
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return new hbs.handlebars.SafeString(templateFn(this.pagination));
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});
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});
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ghost.registerThemeHelper('helperMissing', function (arg) {
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if (arguments.length === 2) {
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return undefined;
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}
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errors.logError("Missing helper: '" + arg + "'");
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});
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// Return once the template-driven helpers have loaded
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return when.join(
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paginationHelper
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);
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};
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module.exports.loadCoreHelpers = coreHelpers;
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