wip: intercom like live chat with chat widget

- new vue app for serving live chat widget, created subdirectories inside frontend dir `main` and `widget`
- vite changes for both main app and widget app.
- new backend live chat channel
- apis for live chat widget

cmd/init.go

@@ -27,6 +27,7 @@ import (
 	customAttribute "github.com/abhinavxd/libredesk/internal/custom_attribute"
 	"github.com/abhinavxd/libredesk/internal/inbox"
 	"github.com/abhinavxd/libredesk/internal/inbox/channel/email"
+	"github.com/abhinavxd/libredesk/internal/inbox/channel/livechat"
 	imodels "github.com/abhinavxd/libredesk/internal/inbox/models"
 	"github.com/abhinavxd/libredesk/internal/macro"
 	"github.com/abhinavxd/libredesk/internal/media"
@@ -132,7 +133,8 @@ func initConstants() *constants {
 // initFS initializes the stuffbin FileSystem.
 func initFS() stuffbin.FileSystem {
 	var files = []string{
-		"frontend/dist",
+		"frontend/dist/main",
+		"frontend/dist/widget",
 		"i18n",
 		"static",
 	}
@@ -572,11 +574,41 @@ func initEmailInbox(inboxRecord imodels.Inbox, msgStore inbox.MessageStore, usrS
 	return inbox, nil
 }
 
+// initLiveChatInbox initializes the live chat inbox.
+func initLiveChatInbox(inboxRecord imodels.Inbox, msgStore inbox.MessageStore, usrStore inbox.UserStore) (inbox.Inbox, error) {
+	var config livechat.Config
+
+	// Load JSON data into Koanf.
+	if err := ko.Load(rawbytes.Provider([]byte(inboxRecord.Config)), kjson.Parser()); err != nil {
+		return nil, fmt.Errorf("loading config: %w", err)
+	}
+
+	if err := ko.UnmarshalWithConf("", &config, koanf.UnmarshalConf{Tag: "json"}); err != nil {
+		return nil, fmt.Errorf("unmarshalling `%s` %s config: %w", inboxRecord.Channel, inboxRecord.Name, err)
+	}
+
+	inbox, err := livechat.New(msgStore, usrStore, livechat.Opts{
+		ID:     inboxRecord.ID,
+		Config: config,
+		Lo:     initLogger("livechat_inbox"),
+	})
+
+	if err != nil {
+		return nil, fmt.Errorf("initializing `%s` inbox: `%s` error : %w", inboxRecord.Channel, inboxRecord.Name, err)
+	}
+
+	log.Printf("`%s` inbox successfully initialized", inboxRecord.Name)
+
+	return inbox, nil
+}
+
 // initializeInboxes handles inbox initialization.
 func initializeInboxes(inboxR imodels.Inbox, msgStore inbox.MessageStore, usrStore inbox.UserStore) (inbox.Inbox, error) {
 	switch inboxR.Channel {
 	case "email":
 		return initEmailInbox(inboxR, msgStore, usrStore)
+	case "livechat":
+		return initLiveChatInbox(inboxR, msgStore, usrStore)
 	default:
 		return nil, fmt.Errorf("unknown inbox channel: %s", inboxR.Channel)
 	}