dojo-templater

Mustache = require("mustache") i18n = require("i18next") fs = require("fs") Handlebars = require("handlebars") handlebarsLayouts = require("handlebars-layouts")(Handlebars) juice = require("juice") charttile = require('./charttile') path = require('path') TEMPLATE_DIR = "#{__dirname}/../email_templates" LAYOUT_DIR = "#{__dirname}/../layouts" LANGUAGE_DIR = "#{__dirname}/../language" CSS_DIR = "#{__dirname}/../" DEFAULT_LAYOUT = "teacher_email" FIXTURES = require("./fixtures") class Templater ### constructor Loads templates into memory ### constructor: () -> @templates = {} @translate_functions = {} files = fs.readdirSync TEMPLATE_DIR ## Register all Handlebars layouts @layouts = { } # { name: path } files = fs.readdirSync LAYOUT_DIR for file in files if file.indexOf('.hb') isnt -1 layoutPath = [LAYOUT_DIR, file].join("/") partial = fs.readFileSync layoutPath, 'utf8' layoutName = file.replace('.hb', '') @layouts[layoutName] = partial # Options for inlining css @juiceOptions = applyStyleTags: false removeStyleTags: false url: ["file://", CSS_DIR].join("") # Get the template if it has already been loaded to memory # Otherwise, load it into memory _getTemplate: (fileName, language) => if not @templates[fileName]? @templates[fileName] = {} if fileName.indexOf(".hb") is -1 fileNameExt = fileName + ".hb" if @templates[fileName][language]? return @templates[fileName][language] else templates = [ 'parentMain', 'pipes', 'responsiveMain', 'studentMain', 'teacherMain', 'template3', 'template3White', 'template_CDM', 'teacherNew' ] for templateName in templates Handlebars.registerPartial templateName, @layouts[templateName] # end terrible hack. templatePath = [TEMPLATE_DIR, fileNameExt].join("/") templateRaw = fs.readFileSync templatePath, 'utf8' template = Handlebars.compile templateRaw @templates[fileName][language] = template return @templates[fileName][language] # render handlebars email fetchEmail: (fileName, templateVars, options, callback) => # Only use the basename of the file for fixtures and such fullFilename = fileName fileName = path.basename(fileName) # Set language if not passed in if not options.language? options.language = 'en' # Get translate function @_get_translate_function options.language, (t) => # Helper for translations in handlebars # The second param 'options' is used for passing in data to # translation strings. # Example usage: # {{ I18n "dojo-templater.emails:initial_parent_invite.would_like_to_share" link1=inviteLink }} Handlebars.registerHelper 'I18n', (str, options) => if options and options.hash options = options.hash else options = {} return t(str, options) # helper function for {{ifeq a 5}} ... {else} ... {/ifeq} Handlebars.registerHelper 'ifeq', (a, b, options) -> if(a is b) return options.fn(this); else return options.inverse(this); # Get the template try template = @_getTemplate fullFilename, options.language catch err return callback err # Use fixtures? if options.useFixtures templateVars = FIXTURES[fileName] # templateVars must be defined, or handlebars will throw an error if not templateVars? templateVars = {} # Compile template with vars compiled = template(templateVars) # Inline CSS juice.juiceContent compiled, @juiceOptions, (err, htmlEmail) => # make the object to return result = html: htmlEmail plain: @_html_to_plain(htmlEmail) subject: @_getSubject fileName, templateVars, t # callback callback err, result ### ### # Swap {{ var }} with the variable name in the template _insert_vars: (template_html, template_vars) => output = Mustache.render(template_html, template_vars) return output ### ### # Get subject for a given filename # The subject line is in a field called '_subject' in the language # file for this email. Translate it here _getSubject: (file_name, template_vars, t) => subject = t("dojo-templater.emails:#{file_name}._subject") subjectTemplate = Handlebars.compile subject compiled = subjectTemplate(template_vars) ## Hack to catch when subject does not get translated ## Currently, subject works fine locally, not on staging or production if compiled.indexOf("dojo-templater") isnt -1 compiled = "Welcome to ClassDojo :)" return compiled ### ### ### Every language needs to be inited seperately, but we cache the function so that we don't have to load the resource files every time ### _get_translate_function: (language, callback) => # console.log "Initing with lang: #{language} <br/><br/>" if not @translate_functions[language]? i18n.init { lng: language, fallbackLng: 'en', ns: { namespaces: ['dojo-templater.layouts', 'dojo-templater.emails'], defaultNs: 'dojo-templater.layouts' }, resGetPath: "#{__dirname}/../language/__lng__/__ns__.json" }, (t) => @translate_functions[language] = t callback(t) else callback(@translate_functions[language]) ### ### # Take an html string and return a plain text string _html_to_plain: (html) => return if not html? str=html str=str.replace(/<style>([^<]*)<\/style>/, "") str=str.replace(/<br>/gi, "\n"); str=str.replace(/<p.*>/gi, "\n"); str=str.replace(/<a.*href=\"(.*?)\".*>(.*?)<\/a>/gi, " $2 (Link->$1) "); str=str.replace(/<(?:.|\s)*?>/g, ""); return str module.exports = Templater