feat: Remove restrictions on API channel webhook_url (#2261)

app/javascript/dashboard/routes/dashboard/settings/inbox/channels/Api.vue

@@ -56,7 +56,8 @@ import { required } from 'vuelidate/lib/validators';
 import router from '../../../../index';
 import PageHeader from '../../SettingsSubPageHeader';
 
-const shouldBeWebhookUrl = (value = '') => value.startsWith('http');
+const shouldBeWebhookUrl = (value = '') =>
+  value ? value.startsWith('http') : true;
 
 export default {
   components: {
@@ -76,7 +77,7 @@ export default {
   },
   validations: {
     channelName: { required },
-    webhookUrl: { required, shouldBeWebhookUrl },
+    webhookUrl: { shouldBeWebhookUrl },
   },
   methods: {
     async createChannel() {

app/listeners/webhook_listener.rb

@@ -59,7 +59,9 @@ class WebhookListener < BaseListener
       WebhookJob.perform_later(webhook.url, payload)
     end
 
-    # Deliver for API Inbox
-    WebhookJob.perform_later(inbox.channel.webhook_url, payload) if inbox.channel_type == 'Channel::Api'
+    return unless inbox.channel_type == 'Channel::Api'
+    return if inbox.channel.webhook_url.blank?
+
+    WebhookJob.perform_later(inbox.channel.webhook_url, payload)
   end
 end

app/models/channel/api.rb

@@ -3,7 +3,7 @@
 # Table name: channel_api
 #
 #  id          :bigint           not null, primary key
-#  webhook_url :string           not null
+#  webhook_url :string
 #  created_at  :datetime         not null
 #  updated_at  :datetime         not null
 #  account_id  :integer          not null