FEATURE: disable invites by setting max_invites_per_day to 0

lib/guardian.rb

@@ -200,6 +200,7 @@ class Guardian
 
   def can_invite_to_forum?(groups=nil)
     authenticated? &&
+    SiteSetting.max_invites_per_day.to_i > 0 &&
     !SiteSetting.enable_sso &&
     SiteSetting.enable_local_logins &&
     (
@@ -212,6 +213,7 @@ class Guardian
   def can_invite_to?(object, group_ids=nil)
     return false if ! authenticated?
     return false unless ( SiteSetting.enable_local_logins && (!SiteSetting.must_approve_users? || is_staff?) )
+    return false if SiteSetting.max_invites_per_day.to_i == 0
     return true if is_admin?
     return false if ! can_see?(object)
     return false if group_ids.present?

spec/components/guardian_spec.rb

@@ -245,6 +245,12 @@ describe Guardian do
       expect(Guardian.new(moderator).can_invite_to_forum?).to be_truthy
     end
 
+    it 'returns false when max_invites_per_day is 0' do
+      # let's also break it while here
+      SiteSetting.max_invites_per_day = "a"
+      expect(Guardian.new(moderator).can_invite_to_forum?).to be_falsey
+    end
+
     it 'returns false when the site requires approving users and is regular' do
       SiteSetting.expects(:must_approve_users?).returns(true)
       expect(Guardian.new(user).can_invite_to_forum?).to be_falsey
@@ -275,6 +281,9 @@ describe Guardian do
       expect(Guardian.new(moderator).can_invite_to?(nil)).to be_falsey
       expect(Guardian.new(moderator).can_invite_to?(topic)).to be_truthy
       expect(Guardian.new(user).can_invite_to?(topic)).to be_falsey
+
+      SiteSetting.max_invites_per_day = 0
+      expect(Guardian.new(moderator).can_invite_to?(topic)).to be_falsey
     end
 
     it 'returns true when the site requires approving users and is mod' do