FEATURE: allow end users to opt out of getting any private messages

app/assets/javascripts/discourse/models/user.js.es6

@@ -181,6 +181,7 @@ const User = Discourse.Model.extend({
                                'email_direct',
                                'email_always',
                                'email_private_messages',
+                               'allow_private_messages',
                                'dynamic_favicon',
                                'digest_after_days',
                                'new_topic_duration_minutes',

app/assets/javascripts/discourse/templates/user/preferences.hbs

@@ -211,6 +211,7 @@
       {{preference-checkbox labelKey="user.enable_quoting" checked=enable_quoting}}
       {{preference-checkbox labelKey="user.dynamic_favicon" checked=dynamic_favicon}}
       {{preference-checkbox labelKey="user.disable_jump_reply" checked=disable_jump_reply}}
+      {{preference-checkbox labelKey="user.allow_private_messages" checked=allow_private_messages}}
       {{#unless editHistoryVisible}}
         {{preference-checkbox labelKey="user.edit_history_public" checked=edit_history_public}}
       {{/unless}}

app/serializers/user_serializer.rb

@@ -95,7 +95,8 @@ class UserSerializer < BasicUserSerializer
                      :custom_avatar_upload_id,
                      :has_title_badges,
                      :card_image_badge,
-                     :card_image_badge_id
+                     :card_image_badge_id,
+                     :allow_private_messages
 
   untrusted_attributes :bio_raw,
                        :bio_cooked,
@@ -157,6 +158,10 @@ class UserSerializer < BasicUserSerializer
     object.user_profile.location
   end
 
+  def allow_private_messages
+    object.user_profile.allow_private_messages
+  end
+
   def can_edit
     scope.can_edit?(object)
   end

app/services/user_updater.rb

@@ -19,11 +19,6 @@ class UserUpdater
     :edit_history_public
   ]
 
-  PROFILE_ATTR = [
-    :location,
-    :dismissed_banner_key
-  ]
-
   def initialize(actor, user)
     @user = user
     @guardian = Guardian.new(actor)
@@ -33,6 +28,9 @@ class UserUpdater
     user_profile = user.user_profile
     user_profile.website = format_url(attributes.fetch(:website) { user_profile.website })
     user_profile.bio_raw = attributes.fetch(:bio_raw) { user_profile.bio_raw }
+    user_profile.allow_private_messages = attributes.fetch(:allow_private_messages) {
+      user_profile.allow_private_messages
+    }
 
     user.name = attributes.fetch(:name) { user.name }
     user.locale = attributes.fetch(:locale) { user.locale }

config/locales/client.en.yml

@@ -335,6 +335,7 @@ en:
       dismiss_notifications: "Mark all as Read"
       dismiss_notifications_tooltip: "Mark all unread notifications as read"
       disable_jump_reply: "Don't jump to my post after I reply"
+      allow_private_messages: "Allow users to send me private messages"
       dynamic_favicon: "Show incoming message notifications on favicon (experimental)"
       edit_history_public: "Let other users view my post revisions"
       external_links_in_new_tab: "Open all external links in a new tab"

db/migrate/20150323034933_add_allow_private_messages_to_user_profile.rb

@@ -0,0 +1,5 @@
+class AddAllowPrivateMessagesToUserProfile < ActiveRecord::Migration
+  def change
+    add_column :user_profiles, :allow_private_messages, :boolean, default: true, null: false
+  end
+end

lib/guardian.rb

@@ -260,6 +260,8 @@ class Guardian
     (SiteSetting.enable_private_messages ||
       @user.username == SiteSetting.site_contact_username ||
       @user == Discourse.system_user) &&
+    # Only staff can send PMs to users that opt-out
+    (!target.is_a?(User) || is_staff? || target.user_profile.allow_private_messages) &&
     # Can't send PMs to suspended users
     (is_staff? || target.is_a?(Group) || !target.suspended?)
   end

spec/components/post_creator_spec.rb

@@ -393,14 +393,30 @@ describe PostCreator do
     let(:target_user1) { Fabricate(:coding_horror) }
     let(:target_user2) { Fabricate(:moderator) }
     let(:unrelated) { Fabricate(:user) }
-    let(:post) do
+
-      PostCreator.create(user, title: 'hi there welcome to my topic',
+    def create_pm(from, to)
+      PostCreator.create(from, title: 'hi there welcome to my topic',
                                raw: "this is my awesome message @#{unrelated.username_lower}",
                                archetype: Archetype.private_message,
-                               target_usernames: [target_user1.username, target_user2.username].join(','),
+                               target_usernames: to.join(','),
                                category: 1)
     end
 
+    let(:post) do
+      create_pm(user, [target_user1.username, target_user2.username])
+    end
+
+    it 'disallows PM to end users that disable it' do
+      profile = target_user2.user_profile
+      profile.allow_private_messages = false
+      profile.save
+
+      post = create_pm(user, [target_user2.username])
+
+      expect(post).to be_nil
+
+    end
+
     it 'acts correctly' do
       # It's not a warning
       expect(post.topic.warning).to be_blank
@@ -476,10 +492,11 @@ describe PostCreator do
     end
     let(:unrelated) { Fabricate(:user) }
     let(:post) do
-      PostCreator.create(user, title: 'hi there welcome to my topic',
+      PostCreator.new(user, title: 'hi there welcome to my topic',
                                raw: "this is my awesome message @#{unrelated.username_lower}",
                                archetype: Archetype.private_message,
-                               target_group_names: group.name)
+                               target_group_names: group.name).create
+
     end
 
     it 'acts correctly' do