Let all moderators revoke blocks by editing

app/controllers/user_blocks_controller.rb

@@ -70,8 +70,7 @@ class UserBlocksController < ApplicationController
 
   def update
     if @valid_params
-      if current_user != @user_block.creator &&
-         current_user != @user_block.revoker
+      if cannot?(:update, @user_block)
         flash[:error] = t(@user_block.revoker ? ".only_creator_or_revoker_can_edit" : ".only_creator_can_edit")
         redirect_to :action => "edit"
       else
@@ -81,7 +80,10 @@ class UserBlocksController < ApplicationController
         @user_block.ends_at = Time.now.utc + @block_period.hours
         @user_block.deactivates_at = (@user_block.ends_at unless @user_block.needs_view)
         @user_block.revoker = current_user if user_block_was_active && !@user_block.active?
-        if !user_block_was_active && @user_block.active?
+        if user_block_was_active && @user_block.active? && current_user != @user_block.creator
+          flash.now[:error] = t(".only_creator_can_edit_without_revoking")
+          render :action => "edit"
+        elsif !user_block_was_active && @user_block.active?
           flash.now[:error] = t(".inactive_block_cannot_be_reactivated")
           render :action => "edit"
         else

config/locales/en.yml

@@ -2949,6 +2949,7 @@ en:
       flash: "Created a block on user %{name}."
     update:
       only_creator_can_edit: "Only the moderator who created this block can edit it."
+      only_creator_can_edit_without_revoking: "Only the moderator who created this block can edit it without revoking."
       only_creator_or_revoker_can_edit: "Only the moderators who created or revoked this block can edit it."
       inactive_block_cannot_be_reactivated: "This block is inactive and cannot be reactivated."
       success: "Block updated."

test/controllers/user_blocks_controller_test.rb

@@ -391,7 +391,6 @@ class UserBlocksControllerTest < ActionDispatch::IntegrationTest
   # test the update action
   def test_update
     moderator_user = create(:moderator_user)
-    second_moderator_user = create(:moderator_user)
     active_block = create(:user_block, :creator => moderator_user)
 
     # Not logged in yet, so updating a block should fail
@@ -405,19 +404,7 @@ class UserBlocksControllerTest < ActionDispatch::IntegrationTest
     put user_block_path(:id => active_block)
     assert_redirected_to :controller => "errors", :action => "forbidden"
 
-    # Login as the wrong moderator
-    session_for(second_moderator_user)
-
-    # Check that only the person who created a block can update it
-    assert_no_difference "UserBlock.count" do
-      put user_block_path(:id => active_block,
-                          :user_block_period => "12",
-                          :user_block => { :needs_view => true, :reason => "Vandalism" })
-    end
-    assert_redirected_to edit_user_block_path(active_block)
-    assert_equal "Only the moderator who created this block can edit it.", flash[:error]
-
-    # Login as the correct moderator
+    # Login as the moderator
     session_for(moderator_user)
 
     # A bogus block period should result in an error
@@ -495,7 +482,7 @@ class UserBlocksControllerTest < ActionDispatch::IntegrationTest
 
   ##
   # test the update action revoking the block
-  def test_revoke_using_update
+  def test_revoke_using_update_by_creator
     moderator_user = create(:moderator_user)
     block = create(:user_block, :creator => moderator_user)
 
@@ -503,6 +490,8 @@ class UserBlocksControllerTest < ActionDispatch::IntegrationTest
     put user_block_path(block,
                         :user_block_period => "24",
                         :user_block => { :needs_view => false, :reason => "Updated Reason" })
+    assert_redirected_to user_block_path(block)
+    assert_equal "Block updated.", flash[:notice]
     block.reload
     assert_predicate block, :active?
     assert_nil block.revoker
@@ -510,11 +499,38 @@ class UserBlocksControllerTest < ActionDispatch::IntegrationTest
     put user_block_path(block,
                         :user_block_period => "0",
                         :user_block => { :needs_view => false, :reason => "Updated Reason" })
+    assert_redirected_to user_block_path(block)
+    assert_equal "Block updated.", flash[:notice]
     block.reload
     assert_not_predicate block, :active?
     assert_equal moderator_user, block.revoker
   end
 
+  def test_revoke_using_update_by_other_moderator
+    creator_user = create(:moderator_user)
+    other_moderator_user = create(:moderator_user)
+    block = create(:user_block, :creator => creator_user)
+
+    session_for(other_moderator_user)
+    put user_block_path(block,
+                        :user_block_period => "24",
+                        :user_block => { :needs_view => false, :reason => "Updated Reason" })
+    assert_response :success
+    assert_equal "Only the moderator who created this block can edit it without revoking.", flash[:error]
+    block.reload
+    assert_predicate block, :active?
+    assert_nil block.revoker
+
+    put user_block_path(block,
+                        :user_block_period => "0",
+                        :user_block => { :needs_view => false, :reason => "Updated Reason" })
+    assert_redirected_to user_block_path(block)
+    assert_equal "Block updated.", flash[:notice]
+    block.reload
+    assert_not_predicate block, :active?
+    assert_equal other_moderator_user, block.revoker
+  end
+
   ##
   # test the revoke action
   def test_revoke