Add ability limit write access to a subset of users through an additional configuration file

Author: ScreamingHawk

README.md

@@ -385,6 +385,12 @@ Configuration options reference
 
   If the endpoint doesn't provide the email address for the user, allow empty emails to authenticate anyway. Note that GitHub authentication usually requires this to be `true` (unless all wiki users have public email addresses on their GitHub accounts).
 
+#### authorization.moderatorsFile (string: "")
+
+  Absolute path for your moderators YAML file. If used, this file must contain a list of `usernames` and `emails` for users who have write access to the wiki. A user who has a match in either the `usernames` or `emails` list will have right access.
+
+  If this field is left blank, all logged in users will have write access to the wiki.
+
 #### pages.index (string: "Home")
 
   Defines the page name for the index of the wiki

lib/app.js

@@ -175,7 +175,23 @@ module.exports.initialize = function (config) {
     }
   }
 
-  app.all('/pages/*', requireAuthentication)
+  function requireModerator (req, res, next) {
+    requireAuthentication(req, res, function(){
+      if (!res.locals.user.moderator) {
+        res.locals.title = '403 - Permission denied'
+        res.statusCode = 403
+        res.render('403.pug')
+      } else {
+        next()
+      }
+    })
+  }
+
+  if (app.locals.config.get('authorization').moderators) {
+    app.all('/pages/*', requireModerator)
+  } else {
+    app.all('/pages/*', requireAuthentication)
+  }
 
   if (!app.locals.config.get('authorization').anonRead) {
     app.all('/wiki', requireAuthentication)

lib/config.js

@@ -36,6 +36,11 @@ module.exports = (function () {
         }
       }
 
+      // Load moderators from moderatorsFile
+      if (config.authorization.moderatorsFile){
+        config.authorization.moderators = yaml.load(fs.readFileSync(config.authorization.moderatorsFile).toString())
+      }
+
       return true
     },
 
@@ -121,7 +126,8 @@ module.exports = (function () {
         anonRead: true,
         validMatches: '.+',
         // Breaking changes in Jingo 1.5 (when this parameter has been added): the default for new servers is to NOT allow empty emails to validate
-        emptyEmailMatches: false
+        emptyEmailMatches: false,
+        moderatorsFile: ''
       },
 
       // Defaults for the pages key are compatible with Jingo < 1 (which means

routes/auth.js

@@ -184,6 +184,19 @@ passport.deserializeUser(function (user, done) {
     user.email = 'jingouser'
   }
 
+  // Check moderator status
+  user.moderator = false
+  var moderators = app.locals.config.get('authorization').moderators
+  if (moderators){
+    if (moderators.usernames.indexOf(user.displayName) > -1 ||
+        moderators.emails.indexOf(user.email) > -1){
+      user.moderator = true
+    }
+  } else {
+    // If no moderators file supplied everyone is a 'moderator'
+    user.moderator = true
+  }
+
   user.asGitAuthor = user.displayName + ' <' + user.email + '>'
   done(undefined, user)
 })

views/403.pug

@@ -0,0 +1,7 @@
+extends layout
+
+block content
+  #content
+    .jumbotron
+      h2 #{title}
+      p You do not have permission to perform this action