feat: Disable attachments and emoji picker in the web widget (#1102)

Signed-off-by: Pranav Raj Sreepuram <pranavrajs@gmail.com>

app/javascript/shared/mixins/inboxMixin.js

@@ -0,0 +1,42 @@
+export const INBOX_TYPES = {
+  WEB: 'Channel::WebWidget',
+  FB: 'Channel::FacebookPage',
+  TWITTER: 'Channel::TwitterProfile',
+  TWILIO: 'Channel::TwilioSms',
+  API: 'Channel::Api',
+  EMAIL: 'Channel::Email',
+};
+
+export default {
+  computed: {
+    channelType() {
+      return this.inbox.channel_type;
+    },
+    isAPIInbox() {
+      return this.channelType === INBOX_TYPES.API;
+    },
+    isATwitterInbox() {
+      return this.channelType === INBOX_TYPES.TWITTER;
+    },
+    isAFacebookInbox() {
+      return this.channelType === INBOX_TYPES.FB;
+    },
+    isAWebWidgetInbox() {
+      return this.channelType === INBOX_TYPES.WEB;
+    },
+    isATwilioChannel() {
+      return this.channelType === INBOX_TYPES.TWILIO;
+    },
+    isAnEmailChannel() {
+      return this.channelType === INBOX_TYPES.EMAIL;
+    },
+    isATwilioSMSChannel() {
+      const { phone_number: phoneNumber = '' } = this.inbox;
+      return this.isATwilioChannel && !phoneNumber.startsWith('whatsapp');
+    },
+    isATwilioWhatsappChannel() {
+      const { phone_number: phoneNumber = '' } = this.inbox;
+      return this.isATwilioChannel && phoneNumber.startsWith('whatsapp');
+    },
+  },
+};