Extract zoom meeting validators to Validator class

app/models/zoom_meeting.rb

@@ -5,9 +5,7 @@ class ZoomMeeting < ApplicationRecord
   belongs_to :issue, optional: false
 
   validates :url, presence: true, length: { maximum: 255 }
-
-  validate :check_zoom_url
-  validate :check_issue_association
+  validates_with ZoomMeetingValidator
 
   enum issue_status: {
     added: 1,
@@ -17,17 +15,4 @@ class ZoomMeeting < ApplicationRecord
   scope :added_to_issue, -> { where(issue_status: :added) }
   scope :removed_from_issue, -> { where(issue_status: :removed) }
 
-  private
-
-  def check_zoom_url
-    return if Gitlab::ZoomLinkExtractor.new(url).links.size == 1
-
-    errors.add(:url, 'must contain one valid Zoom URL')
-  end
-
-  def check_issue_association
-    return if project == issue&.project
-
-    errors.add(:issue, 'must associate the same project')
-  end
 end

app/validators/zoom_meeting_validator.rb

+# frozen_string_literal: true
+
+# ZoomMeetingValidator
+#
+# Custom validator to TODO
+#
+class ZoomMeetingValidator < ActiveModel::Validator
+  def validate(zoom_meeting)
+    unless Gitlab::ZoomLinkExtractor.new(zoom_meeting.url).links.size == 1
+      zoom_meeting.errors.add(:url, 'must contain one valid Zoom URL')
+    end
+    unless zoom_meeting.project == zoom_meeting.issue&.project
+      zoom_meeting.errors.add(:issue, 'must associate the same project')
+    end
+    true
+  end
+end