feat: allow inbox specific flags for signature toggle (#8280)

Co-authored-by: Nithin David Thomas <1277421+nithindavid@users.noreply.github.com>

app/javascript/dashboard/mixins/uiSettings.js

@@ -1,4 +1,5 @@
 import { mapGetters } from 'vuex';
+
 export const DEFAULT_CONVERSATION_SIDEBAR_ITEMS_ORDER = [
   { name: 'conversation_actions' },
   { name: 'macros' },
@@ -13,6 +14,9 @@ export const DEFAULT_CONTACT_SIDEBAR_ITEMS_ORDER = [
   { name: 'previous_conversation' },
 ];
 
+const slugifyChannel = name =>
+  name.toLowerCase().replace(' ', '_').replace('-', '_').replace('::', '_');
+
 export const isEditorHotKeyEnabled = (uiSettings, key) => {
   const {
     editor_message_key: editorMessageKey,
@@ -65,5 +69,17 @@ export default {
     toggleSidebarUIState(key) {
       this.updateUISettings({ [key]: !this.isContactSidebarItemOpen(key) });
     },
+    setSignatureFlagForInbox(channelType, value) {
+      channelType = slugifyChannel(channelType);
+      this.updateUISettings({
+        [`${channelType}_signature_enabled`]: value,
+      });
+    },
+    fetchSignatureFlagFromUiSettings(channelType) {
+      if (!channelType) return false;
+
+      channelType = slugifyChannel(channelType);
+      return this.uiSettings[`${channelType}_signature_enabled`];
+    },
   },
 };