(feature) New MessagesWillBeConsumed Server Plugin Hook (#23305)

* feature: implemented basic MessageWillBeConsumed hook and applied on GetSinglePost method.

* use hook in get methods

* chore: refactored hook usage and created utils functions to apply hook

* bugfix: single post not updating

* chore: adjusted hook to return post

* chore: reverted some uneeded  changes

* chore: updated hook to accept slice of posts

* bugfix: slice filled with niil values

* chore: MessageWillBeConsumed ranamed to MessagesWillBeConsumed

* Update plugin/hooks.go

Co-authored-by: Jesse Hallam <jesse@thehallams.ca>

* Add feature flag

* Update min version

* update tests to account for feature flag

* fix linting issues

---------

Co-authored-by: Matej Topolovac <>
Co-authored-by: mtopolovac <43346061+mtopolovac@users.noreply.github.com>
Co-authored-by: Jesse Hallam <jesse@thehallams.ca>
Co-authored-by: Kevin Hsieh <kevinh@qrypt.com>
Co-authored-by: Jesse Hallam <jesse.hallam@gmail.com>

server/public/plugin/plugintest/hooks.go

@@ -198,6 +198,22 @@ func (_m *Hooks) MessageWillBeUpdated(c *plugin.Context, newPost *model.Post, ol
 	return r0, r1
 }
 
+// MessagesWillBeConsumed provides a mock function with given fields: posts
+func (_m *Hooks) MessagesWillBeConsumed(posts []*model.Post) []*model.Post {
+	ret := _m.Called(posts)
+
+	var r0 []*model.Post
+	if rf, ok := ret.Get(0).(func([]*model.Post) []*model.Post); ok {
+		r0 = rf(posts)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*model.Post)
+		}
+	}
+
+	return r0
+}
+
 // NotificationWillBePushed provides a mock function with given fields: pushNotification, userID
 func (_m *Hooks) NotificationWillBePushed(pushNotification *model.PushNotification, userID string) (*model.PushNotification, string) {
 	ret := _m.Called(pushNotification, userID)