Ghost/core/server/helpers/index.js
Fabian Becker 1cd2fa59bd Correct meta_title for author pages.
closes #3407
- Output correct meta_title for author pages
- Add test for meta_title for tag and author pages
2014-07-25 19:48:49 +00:00

816 lines
24 KiB
JavaScript

var downsize = require('downsize'),
hbs = require('express-hbs'),
moment = require('moment'),
polyglot = require('node-polyglot').instance,
_ = require('lodash'),
when = require('when'),
api = require('../api'),
config = require('../config'),
errors = require('../errors'),
filters = require('../filters'),
template = require('./template'),
schema = require('../data/schema').checks,
assetTemplate = _.template('<%= source %>?v=<%= version %>'),
linkTemplate = _.template('<a href="<%= url %>"><%= text %></a>'),
scriptTemplate = _.template('<script src="<%= source %>?v=<%= version %>"></script>'),
isProduction = process.env.NODE_ENV === 'production',
coreHelpers = {},
registerHelpers,
scriptFiles = {
production: [
'vendor.min.js',
'ghost.min.js',
],
development: [
'vendor-dev.js',
'templates-dev.js',
'ghost-dev.js'
]
};
if (!isProduction) {
hbs.handlebars.logger.level = 0;
}
// [ description]
//
// @param {Object} context date object
// @param {*} options
// @return {Object} A Moment time / date object
coreHelpers.date = function (context, options) {
if (!options && context.hasOwnProperty('hash')) {
options = context;
context = undefined;
// set to published_at by default, if it's available
// otherwise, this will print the current date
if (this.published_at) {
context = this.published_at;
}
}
// ensure that context is undefined, not null, as that can cause errors
context = context === null ? undefined : context;
var f = options.hash.format || 'MMM Do, YYYY',
timeago = options.hash.timeago,
date;
if (timeago) {
date = moment(context).fromNow();
} else {
date = moment(context).format(f);
}
return date;
};
//
// ### URI Encoding helper
//
// *Usage example:*
// `{{encode uri}}`
//
// Returns URI encoded string
//
coreHelpers.encode = function (context, str) {
var uri = context || str;
return new hbs.handlebars.SafeString(encodeURIComponent(uri));
};
// ### Page URL Helper
//
// *Usage example:*
// `{{page_url 2}}`
//
// Returns the URL for the page specified in the current object
// context.
//
coreHelpers.page_url = function (context, block) {
/*jshint unused:false*/
var url = config.paths.subdir;
if (this.tagSlug !== undefined) {
url += '/tag/' + this.tagSlug;
}
if (context > 1) {
url += '/page/' + context;
}
url += '/';
return url;
};
// ### Page URL Helper: DEPRECATED
//
// *Usage example:*
// `{{pageUrl 2}}`
//
// Returns the URL for the page specified in the current object
// context. This helper is deprecated and will be removed in future versions.
//
coreHelpers.pageUrl = function (context, block) {
errors.logWarn('Warning: pageUrl is deprecated, please use page_url instead\n' +
'The helper pageUrl has been replaced with page_url in Ghost 0.4.2, and will be removed entirely in Ghost 0.6\n' +
'In your theme\'s pagination.hbs file, pageUrl should be renamed to page_url');
/*jshint unused:false*/
var self = this;
return coreHelpers.page_url.call(self, context, block);
};
// ### URL helper
//
// *Usage example:*
// `{{url}}`
// `{{url absolute="true"}}`
//
// Returns the URL for the current object context
// i.e. If inside a post context will return post permalink
// absolute flag outputs absolute URL, else URL is relative
coreHelpers.url = function (options) {
var absolute = options && options.hash.absolute;
if (schema.isPost(this)) {
return config.urlForPost(api.settings, this, absolute);
}
if (schema.isTag(this)) {
return when(config.urlFor('tag', {tag: this}, absolute));
}
if (schema.isUser(this)) {
return when(config.urlFor('author', {author: this}, absolute));
}
return when(config.urlFor(this, absolute));
};
// ### Asset helper
//
// *Usage example:*
// `{{asset "css/screen.css"}}`
// `{{asset "css/screen.css" ghost="true"}}`
// Returns the path to the specified asset. The ghost
// flag outputs the asset path for the Ghost admin
coreHelpers.asset = function (context, options) {
var output = '',
isAdmin = options && options.hash && options.hash.ghost;
output += config.paths.subdir + '/';
if (!context.match(/^favicon\.ico$/) && !context.match(/^shared/) && !context.match(/^asset/)) {
if (isAdmin) {
output += 'ghost/';
} else {
output += 'assets/';
}
}
// Get rid of any leading slash on the context
context = context.replace(/^\//, '');
output += context;
if (!context.match(/^favicon\.ico$/)) {
output = assetTemplate({
source: output,
version: coreHelpers.assetHash
});
}
return new hbs.handlebars.SafeString(output);
};
// ### Author Helper
//
// *Usage example:*
// `{{author}}`
//
// Returns the full name of the author of a given post, or a blank string
// if the author could not be determined.
//
coreHelpers.author = function (options) {
options = options || {};
options.hash = options.hash || {};
/*jshint unused:false*/
var autolink = _.isString(options.hash.autolink) && options.hash.autolink === 'false' ? false : true,
output = '';
if (this.author && this.author.name) {
if (autolink) {
output = linkTemplate({
url: config.urlFor('author', {author: this.author}),
text: _.escape(this.author.name)
});
} else {
output = _.escape(this.author.name);
}
}
return new hbs.handlebars.SafeString(output);
};
// ### Tags Helper
//
// *Usage example:*
// `{{tags}}`
// `{{tags separator=' - '}}`
//
// Returns a string of the tags on the post.
// By default, tags are separated by commas.
//
// Note that the standard {{#each tags}} implementation is unaffected by this helper
// and can be used for more complex templates.
coreHelpers.tags = function (options) {
options = options || {};
options.hash = options.hash || {};
var autolink = options.hash && _.isString(options.hash.autolink) && options.hash.autolink === 'false' ? false : true,
separator = options.hash && _.isString(options.hash.separator) ? options.hash.separator : ', ',
prefix = options.hash && _.isString(options.hash.prefix) ? options.hash.prefix : '',
suffix = options.hash && _.isString(options.hash.suffix) ? options.hash.suffix : '',
output = '';
function createTagList(tags) {
var tagNames = _.pluck(tags, 'name');
if (autolink) {
return _.map(tags, function (tag) {
return linkTemplate({
url: config.urlFor('tag', {tag: tag}),
text: _.escape(tag.name)
});
}).join(separator);
}
return _.escape(tagNames.join(separator));
}
if (this.tags && this.tags.length) {
output = prefix + createTagList(this.tags) + suffix;
}
return new hbs.handlebars.SafeString(output);
};
// ### Content Helper
//
// *Usage example:*
// `{{content}}`
// `{{content words="20"}}`
// `{{content characters="256"}}`
//
// Turns content html into a safestring so that the user doesn't have to
// escape it or tell handlebars to leave it alone with a triple-brace.
//
// Enables tag-safe truncation of content by characters or words.
//
// **returns** SafeString content html, complete or truncated.
//
coreHelpers.content = function (options) {
var truncateOptions = (options || {}).hash || {};
truncateOptions = _.pick(truncateOptions, ['words', 'characters']);
_.keys(truncateOptions).map(function (key) {
truncateOptions[key] = parseInt(truncateOptions[key], 10);
});
if (truncateOptions.hasOwnProperty('words') || truncateOptions.hasOwnProperty('characters')) {
// Due to weirdness in downsize the 'words' option
// must be passed as a string. refer to #1796
// TODO: when downsize fixes this quirk remove this hack.
if (truncateOptions.hasOwnProperty('words')) {
truncateOptions.words = truncateOptions.words.toString();
}
return new hbs.handlebars.SafeString(
downsize(this.html, truncateOptions)
);
}
return new hbs.handlebars.SafeString(this.html);
};
// ### Excerpt Helper
//
// *Usage example:*
// `{{excerpt}}`
// `{{excerpt words="50"}}`
// `{{excerpt characters="256"}}`
//
// Attempts to remove all HTML from the string, and then shortens the result according to the provided option.
//
// Defaults to words="50"
//
// **returns** SafeString truncated, HTML-free content.
//
coreHelpers.excerpt = function (options) {
var truncateOptions = (options || {}).hash || {},
excerpt;
truncateOptions = _.pick(truncateOptions, ['words', 'characters']);
_.keys(truncateOptions).map(function (key) {
truncateOptions[key] = parseInt(truncateOptions[key], 10);
});
/*jslint regexp:true */
excerpt = String(this.html).replace(/<\/?[^>]+>/gi, '');
excerpt = excerpt.replace(/(\r\n|\n|\r)+/gm, ' ');
/*jslint regexp:false */
if (!truncateOptions.words && !truncateOptions.characters) {
truncateOptions.words = 50;
}
return new hbs.handlebars.SafeString(
downsize(excerpt, truncateOptions)
);
};
// ### Filestorage helper
//
// *Usage example:*
// `{{file_storage}}`
//
// Returns the config value for fileStorage.
coreHelpers.file_storage = function (context, options) {
/*jshint unused:false*/
if (config.hasOwnProperty('fileStorage')) {
return config.fileStorage.toString();
}
return 'true';
};
// ### Apps helper
//
// *Usage example:*
// `{{apps}}`
//
// Returns the config value for apps.
coreHelpers.apps = function (context, options) {
/*jshint unused:false*/
if (config.hasOwnProperty('apps')) {
return config.apps.toString();
}
return 'false';
};
coreHelpers.ghost_script_tags = function () {
var scriptList = isProduction ? scriptFiles.production : scriptFiles.development;
scriptList = _.map(scriptList, function (fileName) {
return scriptTemplate({
source: config.paths.subdir + '/ghost/scripts/' + fileName,
version: coreHelpers.assetHash
});
});
return scriptList.join('');
};
/*
* Asynchronous Theme Helpers (Registered with registerAsyncThemeHelper)
*/
coreHelpers.body_class = function (options) {
/*jshint unused:false*/
var classes = [],
post = this.post,
tags = this.post && this.post.tags ? this.post.tags : this.tags || [],
page = this.post && this.post.page ? this.post.page : this.page || false;
if (_.isString(this.relativeUrl) && this.relativeUrl.match(/\/(page\/\d)/)) {
classes.push('archive-template');
} else if (!this.relativeUrl || this.relativeUrl === '/' || this.relativeUrl === '') {
classes.push('home-template');
} else if (post) {
classes.push('post-template');
}
if (this.tag !== undefined) {
classes.push('tag-template');
classes.push('tag-' + this.tag.slug);
}
if (tags) {
classes = classes.concat(tags.map(function (tag) { return 'tag-' + tag.slug; }));
}
if (page) {
classes.push('page');
}
return api.settings.read({context: {internal: true}, key: 'activeTheme'}).then(function (response) {
var activeTheme = response.settings[0],
paths = config.paths.availableThemes[activeTheme.value],
view;
if (post) {
view = template.getThemeViewForPost(paths, post).split('-');
// If this is a page and we have a custom page template
// then we need to modify the class name we inject
// e.g. 'page-contact' is outputted as 'page-template-contact'
if (view[0] === 'page' && view.length > 1) {
view.splice(1, 0, 'template');
classes.push(view.join('-'));
}
}
return filters.doFilter('body_class', classes).then(function (classes) {
var classString = _.reduce(classes, function (memo, item) { return memo + ' ' + item; }, '');
return new hbs.handlebars.SafeString(classString.trim());
});
});
};
coreHelpers.post_class = function (options) {
/*jshint unused:false*/
var classes = ['post'],
tags = this.post && this.post.tags ? this.post.tags : this.tags || [],
featured = this.post && this.post.featured ? this.post.featured : this.featured || false,
page = this.post && this.post.page ? this.post.page : this.page || false;
if (tags) {
classes = classes.concat(tags.map(function (tag) { return 'tag-' + tag.slug; }));
}
if (featured) {
classes.push('featured');
}
if (page) {
classes.push('page');
}
return filters.doFilter('post_class', classes).then(function (classes) {
var classString = _.reduce(classes, function (memo, item) { return memo + ' ' + item; }, '');
return new hbs.handlebars.SafeString(classString.trim());
});
};
coreHelpers.ghost_head = function (options) {
/*jshint unused:false*/
var self = this,
blog = config.theme(),
head = [],
majorMinor = /^(\d+\.)?(\d+)/,
trimmedVersion = this.version;
trimmedVersion = trimmedVersion ? trimmedVersion.match(majorMinor)[0] : '?';
head.push('<meta name="generator" content="Ghost ' + trimmedVersion + '" />');
head.push('<link rel="alternate" type="application/rss+xml" title="' +
_.escape(blog.title) + '" href="' + config.urlFor('rss') + '">');
return coreHelpers.url.call(self, {hash: {absolute: true}}).then(function (url) {
head.push('<link rel="canonical" href="' + url + '" />');
return filters.doFilter('ghost_head', head);
}).then(function (head) {
var headString = _.reduce(head, function (memo, item) { return memo + '\n' + item; }, '');
return new hbs.handlebars.SafeString(headString.trim());
});
};
coreHelpers.ghost_foot = function (options) {
/*jshint unused:false*/
var jquery = isProduction ? 'jquery.min.js' : 'jquery.js',
foot = [];
foot.push(scriptTemplate({
source: config.paths.subdir + '/public/' + jquery,
version: coreHelpers.assetHash
}));
return filters.doFilter('ghost_foot', foot).then(function (foot) {
var footString = _.reduce(foot, function (memo, item) { return memo + ' ' + item; }, '');
return new hbs.handlebars.SafeString(footString.trim());
});
};
coreHelpers.meta_title = function (options) {
/*jshint unused:false*/
var title = '',
blog;
if (_.isString(this.relativeUrl)) {
blog = config.theme();
if (!this.relativeUrl || this.relativeUrl === '/' || this.relativeUrl === '' || this.relativeUrl.match(/\/page/)) {
title = blog.title;
} else if (this.post) {
title = this.post.title;
} else if (this.tag) {
title = this.tag.name + ' - ' + blog.title;
} else if (this.author) {
title = this.author.name + ' - ' + blog.title;
}
}
return filters.doFilter('meta_title', title).then(function (title) {
title = title || '';
return title.trim();
});
};
coreHelpers.meta_description = function (options) {
/*jshint unused:false*/
var description,
blog;
if (_.isString(this.relativeUrl)) {
if (!this.relativeUrl || this.relativeUrl === '/' || this.relativeUrl === '' || this.relativeUrl.match(/\/page/)) {
blog = config.theme();
description = blog.description;
} else {
description = '';
}
}
return filters.doFilter('meta_description', description).then(function (description) {
description = description || '';
return description.trim();
});
};
/**
* Localised string helpers
*
* @param {String} key
* @param {String} default translation
* @param {Object} options
* @return {String} A correctly internationalised string
*/
coreHelpers.e = function (key, defaultString, options) {
var output;
return when.all([
api.settings.read('defaultLang'),
api.settings.read('forceI18n')
]).then(function (values) {
if (values[0].settings[0] === 'en_US' &&
_.isEmpty(options.hash) &&
values[1].settings[0] !== 'true') {
output = defaultString;
} else {
output = polyglot.t(key, options.hash);
}
return output;
});
};
coreHelpers.foreach = function (context, options) {
var fn = options.fn,
inverse = options.inverse,
i = 0,
j = 0,
columns = options.hash.columns,
key,
ret = '',
data;
if (options.data) {
data = hbs.handlebars.createFrame(options.data);
}
function setKeys(_data, _i, _j, _columns) {
if (_i === 0) {
_data.first = true;
}
if (_i === _j - 1) {
_data.last = true;
}
// first post is index zero but still needs to be odd
if (_i % 2 === 1) {
_data.even = true;
} else {
_data.odd = true;
}
if (_i % _columns === 0) {
_data.rowStart = true;
} else if (_i % _columns === (_columns - 1)) {
_data.rowEnd = true;
}
return _data;
}
if (context && typeof context === 'object') {
if (context instanceof Array) {
for (j = context.length; i < j; i += 1) {
if (data) {
data.index = i;
data.first = data.rowEnd = data.rowStart = data.last = data.even = data.odd = false;
data = setKeys(data, i, j, columns);
}
ret = ret + fn(context[i], { data: data });
}
} else {
for (key in context) {
if (context.hasOwnProperty(key)) {
j += 1;
}
}
for (key in context) {
if (context.hasOwnProperty(key)) {
if (data) {
data.key = key;
data.first = data.rowEnd = data.rowStart = data.last = data.even = data.odd = false;
data = setKeys(data, i, j, columns);
}
ret = ret + fn(context[key], {data: data});
i += 1;
}
}
}
}
if (i === 0) {
ret = inverse(this);
}
return ret;
};
// ### Has Helper
// `{{#has tag="video, music"}}`
// Checks whether a post has at least one of the tags
coreHelpers.has = function (options) {
var tags = _.pluck(this.tags, 'name'),
tagList = options && options.hash ? options.hash.tag : false;
function evaluateTagList(expr, tags) {
return expr.split(',').map(function (v) {
return v.trim();
}).reduce(function (p, c) {
return p || (_.findIndex(tags, function (item) {
// Escape regex special characters
item = item.replace(/[\-\/\\\^$*+?.()|\[\]{}]/g, '\\$&');
item = new RegExp(item, 'i');
return item.test(c);
}) !== -1);
}, false);
}
if (!tagList) {
errors.logWarn('Invalid or no attribute given to has helper');
return;
}
if (tagList && evaluateTagList(tagList, tags)) {
return options.fn(this);
}
return options.inverse(this);
};
// ### Pagination Helper
// `{{pagination}}`
// Outputs previous and next buttons, along with info about the current page
coreHelpers.pagination = function (options) {
/*jshint unused:false*/
if (!_.isObject(this.pagination) || _.isFunction(this.pagination)) {
return errors.logAndThrowError('pagination data is not an object or is a function');
}
if (_.isUndefined(this.pagination.page) || _.isUndefined(this.pagination.pages) ||
_.isUndefined(this.pagination.total) || _.isUndefined(this.pagination.limit)) {
return errors.logAndThrowError('All values must be defined for page, pages, limit and total');
}
if ((!_.isNull(this.pagination.next) && !_.isNumber(this.pagination.next)) ||
(!_.isNull(this.pagination.prev) && !_.isNumber(this.pagination.prev))) {
return errors.logAndThrowError('Invalid value, Next/Prev must be a number');
}
if (!_.isNumber(this.pagination.page) || !_.isNumber(this.pagination.pages) ||
!_.isNumber(this.pagination.total) || !_.isNumber(this.pagination.limit)) {
return errors.logAndThrowError('Invalid value, check page, pages, limit and total are numbers');
}
var context = _.merge({}, this.pagination);
if (this.tag !== undefined) {
context.tagSlug = this.tag.slug;
}
return template.execute('pagination', context);
};
coreHelpers.helperMissing = function (arg) {
if (arguments.length === 2) {
return undefined;
}
errors.logError('Missing helper: "' + arg + '"');
};
// ## Admin URL helper
// uses urlFor to generate a URL for either the admin or the frontend.
coreHelpers.admin_url = function (options) {
var absolute = options && options.hash && options.hash.absolute,
// Ghost isn't a named route as currently it violates the must start-and-end with slash rule
context = !options || !options.hash || !options.hash.frontend ? {relativeUrl: '/ghost'} : 'home';
return config.urlFor(context, absolute);
};
// 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);
}
registerHelpers = function (adminHbs, assetHash) {
// Expose hbs instance for admin
coreHelpers.adminHbs = adminHbs;
// Store hash for assets
coreHelpers.assetHash = assetHash;
// 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('has', coreHelpers.has);
registerThemeHelper('page_url', coreHelpers.page_url);
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('ghost_script_tags', coreHelpers.ghost_script_tags);
registerAdminHelper('asset', coreHelpers.asset);
registerAdminHelper('apps', coreHelpers.apps);
registerAdminHelper('file_storage', coreHelpers.file_storage);
};
module.exports = coreHelpers;
module.exports.loadCoreHelpers = registerHelpers;
module.exports.registerThemeHelper = registerThemeHelper;
module.exports.registerAsyncThemeHelper = registerAsyncThemeHelper;
module.exports.scriptFiles = scriptFiles;