mirror of https://github.com/TryGhost/Ghost.git
352 lines
12 KiB
JavaScript
352 lines
12 KiB
JavaScript
// # Ghost Module
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// Defines core methods required to build the application
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// Module dependencies
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var config = require('./../config'),
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when = require('when'),
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express = require('express'),
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errors = require('./server/errorHandling'),
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fs = require('fs'),
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path = require('path'),
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hbs = require('express-hbs'),
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nodefn = require('when/node/function'),
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_ = require('underscore'),
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Polyglot = require('node-polyglot'),
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models = require('./server/models'),
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plugins = require('./server/plugins'),
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requireTree = require('./server/require-tree'),
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permissions = require('./server/permissions'),
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uuid = require('node-uuid'),
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// Variables
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appRoot = path.resolve(__dirname, '../'),
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themePath = path.resolve(appRoot + '/content/themes'),
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pluginPath = path.resolve(appRoot + '/content/plugins'),
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themeDirectories = requireTree(themePath),
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pluginDirectories = requireTree(pluginPath),
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Ghost,
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instance,
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defaults,
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statuses;
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// ## Default values
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/**
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* A hash of default values to use instead of 'magic' numbers/strings.
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* @type {Object}
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*/
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defaults = {
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filterPriority: 5,
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maxPriority: 9
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};
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// ## Article Statuses
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/**
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* A list of atricle status types
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* @type {Object}
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*/
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statuses = {
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'draft': 'draft',
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'complete': 'complete',
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'approved': 'approved',
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'scheduled': 'scheduled',
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'published': 'published'
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};
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// ## Module Methods
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/**
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* @method Ghost
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* @returns {*}
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* @constructor
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*/
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Ghost = function () {
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var app,
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polyglot;
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if (!instance) {
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instance = this;
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// Holds the filters
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instance.filterCallbacks = [];
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// Holds the filter hooks (that are built in to Ghost Core)
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instance.filters = [];
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// Holds the theme directories temporarily
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instance.themeDirectories = {};
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// Holds the plugin directories temporarily
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instance.pluginDirectories = {};
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// Holds the persistent notifications
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instance.notifications = [];
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// Holds the available plugins
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instance.availablePlugins = {};
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// Holds the dbhash (mainly used for cookie secret)
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instance.dbHash = undefined;
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app = express();
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polyglot = new Polyglot();
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_.extend(instance, {
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app: function () { return app; },
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config: function () { return config; },
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// there's no management here to be sure this has loaded
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settings: function () { return instance.settingsCache; },
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dataProvider: models,
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blogGlobals: function () {
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/* this is a bit of a hack until we have a better way to combine settings and config
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* this data is what becomes globally available to themes */
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return {
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url: instance.config().env[process.env.NODE_ENV].url,
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title: instance.settings().title,
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description: instance.settings().description,
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logo: instance.settings().logo,
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/* urg.. need to fix paths */
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themedir: path.join('/content/themes', instance.paths().activeTheme, instance.settingsCache.activeTheme)
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};
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},
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statuses: function () { return statuses; },
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polyglot: function () { return polyglot; },
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getPaths: function () {
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return when.all([themeDirectories, pluginDirectories]).then(function (paths) {
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instance.themeDirectories = paths[0];
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instance.pluginDirectories = paths[1];
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return;
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});
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},
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paths: function () {
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return {
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'appRoot': appRoot,
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'themePath': themePath,
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'pluginPath': pluginPath,
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'activeTheme': path.join(themePath, !instance.settingsCache ? "" : instance.settingsCache.activeTheme),
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'adminViews': path.join(appRoot, '/core/server/views/'),
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'helperTemplates': path.join(appRoot, '/core/server/helpers/tpl/'),
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'lang': path.join(appRoot, '/core/shared/lang/'),
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'availableThemes': instance.themeDirectories,
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'availablePlugins': instance.pluginDirectories
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};
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}
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});
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}
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return instance;
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};
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// Initialise the application
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Ghost.prototype.init = function () {
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var self = this;
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return when.join(instance.dataProvider.init(), instance.getPaths()).then(function () {
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// Initialize plugins
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return self.initPlugins();
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}).then(function () {
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// Initialize the settings cache
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return self.updateSettingsCache();
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}).then(function () {
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// Initialize the permissions actions and objects
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return permissions.init();
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}).then(function () {
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// get the settings and whatnot
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return when(models.Settings.read('dbHash')).then(function (dbhash) {
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// we already ran this, chill
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self.dbHash = dbhash.attributes.value;
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return dbhash.attributes.value;
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}).otherwise(function (error) {
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// this is where all the "first run" functionality should go
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var dbhash = uuid.v4();
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return when(models.Settings.add({key: 'dbHash', value: dbhash})).then(function (returned) {
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self.dbHash = dbhash;
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return dbhash;
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});
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});
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}, errors.logAndThrowError);
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};
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// Maintain the internal cache of the settings object
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Ghost.prototype.updateSettingsCache = function (settings) {
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var self = this;
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settings = settings || {};
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if (!_.isEmpty(settings)) {
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self.settingsCache = settings;
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} else {
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// TODO: this should use api.browse
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return models.Settings.findAll().then(function (result) {
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var settings = {};
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_.map(result.models, function (member) {
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if (!settings.hasOwnProperty(member.attributes.key)) {
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if (member.attributes.key === 'activeTheme') {
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member.attributes.value = member.attributes.value.substring(member.attributes.value.lastIndexOf('/') + 1);
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var settingsThemePath = path.join(themePath, member.attributes.value);
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fs.exists(settingsThemePath, function (exists) {
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if (!exists) {
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member.attributes.value = "casper";
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}
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settings[member.attributes.key] = member.attributes.value;
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});
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return;
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}
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settings[member.attributes.key] = member.attributes.value;
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}
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});
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self.settingsCache = settings;
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}, errors.logAndThrowError);
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}
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};
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// ## Template utils
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// Compile a template for a handlebars helper
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Ghost.prototype.compileTemplate = function (templatePath) {
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return nodefn.call(fs.readFile, templatePath).then(function (templateContents) {
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return hbs.handlebars.compile(templateContents.toString());
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}, errors.logAndThrowError);
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};
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// Load a template for a handlebars helper
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Ghost.prototype.loadTemplate = function (name) {
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var self = this,
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templateFileName = name + '.hbs',
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// Check for theme specific version first
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templatePath = path.join(this.paths().activeTheme, "partials", templateFileName),
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deferred = when.defer();
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// Can't use nodefn here because exists just returns one parameter, true or false
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fs.exists(templatePath, function (exists) {
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if (!exists) {
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// Fall back to helpers templates location
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templatePath = path.join(self.paths().helperTemplates, templateFileName);
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}
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self.compileTemplate(templatePath).then(deferred.resolve, deferred.reject);
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});
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return deferred.promise;
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};
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// Register a handlebars helper for themes
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Ghost.prototype.registerThemeHelper = function (name, fn) {
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hbs.registerHelper(name, fn);
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};
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// Register a new filter callback function
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Ghost.prototype.registerFilter = function (name, priority, fn) {
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// Curry the priority optional parameter to a default of 5
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if (_.isFunction(priority)) {
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fn = priority;
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priority = defaults.filterPriority;
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}
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this.filterCallbacks[name] = this.filterCallbacks[name] || {};
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this.filterCallbacks[name][priority] = this.filterCallbacks[name][priority] || [];
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this.filterCallbacks[name][priority].push(fn);
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};
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// Unregister a filter callback function
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Ghost.prototype.unregisterFilter = function (name, priority, fn) {
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// Curry the priority optional parameter to a default of 5
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if (_.isFunction(priority)) {
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fn = priority;
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priority = defaults.filterPriority;
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}
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// Check if it even exists
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if (this.filterCallbacks[name] && this.filterCallbacks[name][priority]) {
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// Remove the function from the list of filter funcs
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this.filterCallbacks[name][priority] = _.without(this.filterCallbacks[name][priority], fn);
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}
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};
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// Execute filter functions in priority order
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Ghost.prototype.doFilter = function (name, args, callback) {
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var callbacks = this.filterCallbacks[name];
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// Bug out early if no callbacks by that name
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if (!callbacks) {
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return callback(args);
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}
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_.times(defaults.maxPriority + 1, function (priority) {
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// Bug out if no handlers on this priority
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if (!_.isArray(callbacks[priority])) {
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return;
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}
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// Call each handler for this priority level
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_.each(callbacks[priority], function (filterHandler) {
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try {
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args = filterHandler(args);
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} catch (e) {
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// If a filter causes an error, we log it so that it can be debugged, but do not throw the error
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errors.logError(e);
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}
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});
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});
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callback(args);
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};
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// Initialise plugins. Will load from config.activePlugins by default
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Ghost.prototype.initPlugins = function (pluginsToLoad) {
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pluginsToLoad = pluginsToLoad || config.activePlugins;
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var self = this;
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return plugins.init(this, pluginsToLoad).then(function (loadedPlugins) {
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// Extend the loadedPlugins onto the available plugins
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_.extend(self.availablePlugins, loadedPlugins);
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}, errors.logAndThrowError);
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};
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// Initialise Theme or admin
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Ghost.prototype.initTheme = function (app) {
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var self = this,
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hbsOptions;
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return function initTheme(req, res, next) {
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app.set('view engine', 'hbs');
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// return the correct mime type for woff files
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express['static'].mime.define({'application/font-woff': ['woff']});
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if (!res.isAdmin) {
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// self.globals is a hack til we have a better way of getting combined settings & config
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hbsOptions = {templateOptions: {data: {blog: self.blogGlobals()}}};
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if (!self.themeDirectories.hasOwnProperty(self.settings().activeTheme)) {
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// Throw an error if the theme is not available...
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// TODO: move this to happen on app start
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errors.logAndThrowError('The currently active theme ' + self.settings().activeTheme + ' is missing.');
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} else if (self.themeDirectories[self.settings().activeTheme].hasOwnProperty('partials')) {
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// Check that the theme has a partials directory before trying to use it
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hbsOptions.partialsDir = path.join(self.paths().activeTheme, 'partials');
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}
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app.engine('hbs', hbs.express3(hbsOptions));
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app.set('views', self.paths().activeTheme);
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} else {
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app.engine('hbs', hbs.express3({partialsDir: self.paths().adminViews + 'partials'}));
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app.set('views', self.paths().adminViews);
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app.use('/public', express['static'](path.join(__dirname, '/client/assets')));
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app.use('/public', express['static'](path.join(__dirname, '/client')));
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}
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app.use(express['static'](self.paths().activeTheme));
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app.use('/shared', express['static'](path.join(__dirname, '/shared')));
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app.use('/content/images', express['static'](path.join(__dirname, '/../content/images')));
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next();
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};
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};
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// TODO: Expose the defaults for other people to see/manipulate as a static value?
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// Ghost.defaults = defaults;
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module.exports = Ghost;
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