refactor(config.js): Extract config file

* Separate different config source to each files
* Freeze config object

Author: a60814billy

app.js

@@ -29,20 +29,17 @@ var response = require('./lib/response')
 var models = require('./lib/models')
 
 // generate front-end constants by template
-var configJson = config.raw
 var constpath = path.join(__dirname, './public/js/lib/common/constant.ejs')
-var googleApiKey = (fs.existsSync('/run/secrets/google_apiKey') && config.handleDockerSecret('google_apiKey')) || process.env.HMD_GOOGLE_API_KEY || (configJson.google && configJson.google.apiKey) || ''
-var googleClientID = (fs.existsSync('/run/secrets/google_clientID') && config.handleDockerSecret('google_clientID')) || process.env.HMD_GOOGLE_CLIENT_ID || (configJson.google && configJson.google.clientID) || ''
-var dropboxAppKey = (fs.existsSync('/run/secrets/dropbox_appKey') && config.handleDockerSecret('dropbox_appKey')) || process.env.HMD_DROPBOX_APP_KEY || (configJson.dropbox && configJson.dropbox.appKey) || ''
 var data = {
   domain: config.domain,
   urlpath: config.urlpath,
   debug: config.debug,
   version: config.version,
-  GOOGLE_API_KEY: googleApiKey,
-  GOOGLE_CLIENT_ID: googleClientID,
-  DROPBOX_APP_KEY: dropboxAppKey
+  GOOGLE_API_KEY: config.google.clientSecret,
+  GOOGLE_CLIENT_ID: config.google.clientID,
+  DROPBOX_APP_KEY: config.dropbox.clientSecret
 }
+
 ejs.renderFile(constpath, data, {}, function (err, str) {
   if (err) throw new Error(err)
   fs.writeFileSync(path.join(__dirname, './public/build/constant.js'), str)
@@ -204,7 +201,7 @@ function startListen () {
   server.listen(config.port, function () {
     var schema = config.usessl ? 'HTTPS' : 'HTTP'
     logger.info('%s Server listening at port %d', schema, config.port)
-    config.maintenance = false
+    realtime.maintenance = false
   })
 }
 

lib/config.js

@@ -0,0 +1,92 @@
+'use strict'
+
+module.exports = {
+  domain: '',
+  urlpath: '',
+  port: 3000,
+  urladdport: false,
+  alloworigin: ['localhost'],
+  usessl: false,
+  protocolusessl: false,
+  usecdn: true,
+  allowanonymous: true,
+  allowfreeurl: false,
+  defaultpermission: 'editable',
+  dburl: '',
+  db: {},
+  // ssl path
+  sslkeypath: '',
+  sslcertpath: '',
+  sslcapath: '',
+  dhparampath: '',
+  // other path
+  tmppath: './tmp',
+  defaultnotepath: './public/default.md',
+  docspath: './public/docs',
+  indexpath: './public/views/index.ejs',
+  hackmdpath: './public/views/hackmd.ejs',
+  errorpath: './public/views/error.ejs',
+  prettypath: './public/views/pretty.ejs',
+  slidepath: './public/views/slide.ejs',
+  // session
+  sessionname: 'connect.sid',
+  sessionsecret: 'secret',
+  sessionlife: 14 * 24 * 60 * 60 * 1000, // 14 days
+  staticcachetime: 1 * 24 * 60 * 60 * 1000, // 1 day
+  // socket.io
+  heartbeatinterval: 5000,
+  heartbeattimeout: 10000,
+  // document
+  documentmaxlength: 100000,
+  // image upload setting, available options are imgur/s3/filesystem
+  imageUploadType: 'filesystem',
+  imgur: {
+    clientID: undefined
+  },
+  s3: {
+    accessKeyId: undefined,
+    secretAccessKey: undefined,
+    region: undefined
+  },
+  s3bucket: undefined,
+  // authentication
+  facebook: {
+    clientID: undefined,
+    clientSecret: undefined
+  },
+  twitter: {
+    consumerKey: undefined,
+    consumerSecret: undefined
+  },
+  github: {
+    clientID: undefined,
+    clientSecret: undefined
+  },
+  gitlab: {
+    baseURL: undefined,
+    clientID: undefined,
+    clientSecret: undefined,
+    scope: undefined
+  },
+  dropbox: {
+    clientID: undefined,
+    clientSecret: undefined
+  },
+  google: {
+    clientID: undefined,
+    clientSecret: undefined
+  },
+  ldap: {
+    providerName: undefined,
+    url: undefined,
+    bindDn: undefined,
+    bindCredentials: undefined,
+    tokenSecret: undefined,
+    searchBase: undefined,
+    searchFilter: undefined,
+    searchAttributes: undefined,
+    tlsca: undefined
+  },
+  email: true,
+  allowemailregister: true
+}

lib/config/default.js

@@ -0,0 +1,17 @@
+'use strict'
+
+const fs = require('fs')
+
+function getFile (path) {
+  if (fs.existsSync(path)) {
+    return path
+  }
+  return undefined
+}
+
+module.exports = {
+  sslkeypath: getFile('/run/secrets/key.pem'),
+  sslcertpath: getFile('/run/secrets/cert.pem'),
+  sslcapath: getFile('/run/secrets/ca.pem'),
+  dhparampath: getFile('/run/secrets/dhparam.pem')
+}