Decouple chat from core and add chat rest api (#25)

* Decouple the chat package from the core

* Add rest api endpoints for the chat aspect

controllers/chat.go

@@ -0,0 +1,38 @@
+package controllers
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/gabek/owncast/core"
+	"github.com/gabek/owncast/models"
+	"github.com/gabek/owncast/router/middleware"
+)
+
+//GetChatMessages gets all of the chat messages
+func GetChatMessages(w http.ResponseWriter, r *http.Request) {
+	middleware.EnableCors(&w)
+
+	switch r.Method {
+	case http.MethodGet:
+		messages := core.GetAllChatMessages()
+
+		json.NewEncoder(w).Encode(messages)
+	case http.MethodPost:
+		var message models.ChatMessage
+		if err := json.NewDecoder(r.Body).Decode(&message); err != nil {
+			internalErrorHandler(w, err)
+			return
+		}
+
+		if err := core.SendMessageToChat(message); err != nil {
+			badRequestHandler(w, err)
+			return
+		}
+
+		json.NewEncoder(w).Encode(j{"success": true})
+	default:
+		w.WriteHeader(http.StatusNotImplemented)
+		json.NewEncoder(w).Encode(j{"error": "method not implemented (PRs are accepted)"})
+	}
+}

controllers/controllers.go

@@ -0,0 +1,26 @@
+package controllers
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+type j map[string]interface{}
+
+func internalErrorHandler(w http.ResponseWriter, err error) {
+	if err == nil {
+		return
+	}
+
+	w.WriteHeader(http.StatusInternalServerError)
+	json.NewEncoder(w).Encode(j{"error": err.Error()})
+}
+
+func badRequestHandler(w http.ResponseWriter, err error) {
+	if err == nil {
+		return
+	}
+
+	w.WriteHeader(http.StatusBadRequest)
+	json.NewEncoder(w).Encode(j{"error": err.Error()})
+}

core/chat/chat.go

@@ -0,0 +1,80 @@
+package chat
+
+import (
+	"errors"
+	"time"
+
+	"github.com/gabek/owncast/models"
+)
+
+//Setup sets up the chat server
+func Setup(listener models.ChatListener) {
+	messages := []models.ChatMessage{}
+	clients := make(map[string]*Client)
+	addCh := make(chan *Client)
+	delCh := make(chan *Client)
+	sendAllCh := make(chan models.ChatMessage)
+	pingCh := make(chan models.PingMessage)
+	doneCh := make(chan bool)
+	errCh := make(chan error)
+
+	// Demo messages only.  Remove me eventually!!!
+	messages = append(messages, models.ChatMessage{"", "Tom Nook", "I'll be there with Bells on! Ho ho!", "https://gamepedia.cursecdn.com/animalcrossingpocketcamp_gamepedia_en/thumb/4/4f/Timmy_Icon.png/120px-Timmy_Icon.png?version=87b38d7d6130411d113486c2db151385", "demo-message-1", "ChatMessage"})
+	messages = append(messages, models.ChatMessage{"", "Redd", "Fool me once, shame on you. Fool me twice, stop foolin' me.", "https://vignette.wikia.nocookie.net/animalcrossing/images/3/3d/Redd2.gif/revision/latest?cb=20100710004252", "demo-message-2", "ChatMessage"})
+	messages = append(messages, models.ChatMessage{"", "Kevin", "You just caught me before I was about to go work out weeweewee!", "https://vignette.wikia.nocookie.net/animalcrossing/images/2/20/NH-Kevin_poster.png/revision/latest/scale-to-width-down/100?cb=20200410185817", "demo-message-3", "ChatMessage"})
+	messages = append(messages, models.ChatMessage{"", "Isabelle", " Isabelle is the mayor's highly capable secretary. She can be forgetful sometimes, but you can always count on her for information about the town. She wears her hair up in a bun that makes her look like a shih tzu. Mostly because she is one! She also has a twin brother named Digby.", "https://dodo.ac/np/images/thumb/7/7b/IsabelleTrophyWiiU.png/200px-IsabelleTrophyWiiU.png", "demo-message-4", "ChatMessage"})
+	messages = append(messages, models.ChatMessage{"", "Judy", "myohmy, I'm dancing my dreams away.", "https://vignette.wikia.nocookie.net/animalcrossing/images/5/50/NH-Judy_poster.png/revision/latest/scale-to-width-down/100?cb=20200522063219", "demo-message-5", "ChatMessage"})
+	messages = append(messages, models.ChatMessage{"", "Blathers", "Blathers is an owl with brown feathers. His face is white and he has a yellow beak. His arms are wing shaped and he has yellow talons. His eyes are very big with small black irises. He also has big pink cheek circles on his cheeks. His belly appears to be checkered in diamonds with light brown and white squares, similar to an argyle vest, which is traditionally associated with academia. His green bowtie further alludes to his academic nature.", "https://vignette.wikia.nocookie.net/animalcrossing/images/b/b3/NH-character-Blathers.png/revision/latest?cb=20200229053519", "demo-message-6", "ChatMessage"})
+
+	_server = &server{
+		messages,
+		clients,
+		"/entry", //hardcoded due to the UI requiring this and it is not configurable
+		listener,
+		addCh,
+		delCh,
+		sendAllCh,
+		pingCh,
+		doneCh,
+		errCh,
+	}
+}
+
+//Start starts the chat server
+func Start() error {
+	if _server == nil {
+		return errors.New("chat server is nil")
+	}
+
+	ticker := time.NewTicker(30 * time.Second)
+	go func() {
+		for {
+			select {
+			case <-ticker.C:
+				_server.ping()
+			}
+		}
+	}()
+
+	_server.Listen()
+
+	return errors.New("chat server failed to start")
+}
+
+//SendMessage sends a message to all
+func SendMessage(message models.ChatMessage) {
+	if _server == nil {
+		return
+	}
+
+	_server.SendToAll(message)
+}
+
+//GetMessages gets all of the messages
+func GetMessages() []models.ChatMessage {
+	if _server == nil {
+		return []models.ChatMessage{}
+	}
+
+	return _server.Messages
+}

core/chat/client.go

@@ -21,7 +21,6 @@ type Client struct {
 
 	id     string
 	ws     *websocket.Conn
-	server *Server
 	ch     chan models.ChatMessage
 	pingch chan models.PingMessage
 
@@ -29,21 +28,17 @@ type Client struct {
 }
 
 //NewClient creates a new chat client
-func NewClient(ws *websocket.Conn, server *Server) *Client {
+func NewClient(ws *websocket.Conn) *Client {
 	if ws == nil {
 		log.Panicln("ws cannot be nil")
 	}
 
-	if server == nil {
-		log.Panicln("server cannot be nil")
-	}
-
 	ch := make(chan models.ChatMessage, channelBufSize)
 	doneCh := make(chan bool)
 	pingch := make(chan models.PingMessage)
 	clientID := utils.GenerateClientIDFromRequest(ws.Request())
 
-	return &Client{time.Now(), 0, clientID, ws, server, ch, pingch, doneCh}
+	return &Client{time.Now(), 0, clientID, ws, ch, pingch, doneCh}
 }
 
 //GetConnection gets the connection for the client
@@ -55,8 +50,8 @@ func (c *Client) Write(msg models.ChatMessage) {
 	select {
 	case c.ch <- msg:
 	default:
-		c.server.Remove(c)
-		c.server.Err(fmt.Errorf("client %s is disconnected", c.id))
+		_server.remove(c)
+		_server.err(fmt.Errorf("client %s is disconnected", c.id))
 	}
 }
 
@@ -86,7 +81,7 @@ func (c *Client) listenWrite() {
 
 		// receive done request
 		case <-c.doneCh:
-			c.server.Remove(c)
+			_server.remove(c)
 			c.doneCh <- true // for listenRead method
 			return
 		}
@@ -100,7 +95,7 @@ func (c *Client) listenRead() {
 
 		// receive done request
 		case <-c.doneCh:
-			c.server.Remove(c)
+			_server.remove(c)
 			c.doneCh <- true // for listenWrite method
 			return
 
@@ -112,10 +107,12 @@ func (c *Client) listenRead() {
 				c.doneCh <- true
 				return
 			} else if err != nil {
-				c.server.Err(err)
+				_server.err(err)
 			} else {
 				c.MessageCount++
-				c.server.SendToAll(msg)
+
+				msg.ClientID = c.id
+				_server.SendToAll(msg)
 			}
 		}
 	}

core/chat/server.go

@@ -8,16 +8,21 @@ import (
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/websocket"
 
-	"github.com/gabek/owncast/core"
 	"github.com/gabek/owncast/models"
 )
 
+var (
+	_server *server
+)
+
 //Server represents the server which handles the chat
-type Server struct {
+type server struct {
 	Messages []models.ChatMessage
 	Clients  map[string]*Client
 
 	pattern  string
+	listener models.ChatListener
+
 	addCh     chan *Client
 	delCh     chan *Client
 	sendAllCh chan models.ChatMessage
@@ -26,88 +31,44 @@ type Server struct {
 	errCh     chan error
 }
 
-//NewServer creates a new chat server
-func NewServer() *Server {
-	messages := []models.ChatMessage{}
-	clients := make(map[string]*Client)
-	addCh := make(chan *Client)
-	delCh := make(chan *Client)
-	sendAllCh := make(chan models.ChatMessage)
-	pingCh := make(chan models.PingMessage)
-	doneCh := make(chan bool)
-	errCh := make(chan error)
-
-	// Demo messages only.  Remove me eventually!!!
-	messages = append(messages, models.ChatMessage{"Tom Nook", "I'll be there with Bells on! Ho ho!", "https://gamepedia.cursecdn.com/animalcrossingpocketcamp_gamepedia_en/thumb/4/4f/Timmy_Icon.png/120px-Timmy_Icon.png?version=87b38d7d6130411d113486c2db151385", "demo-message-1", "ChatMessage"})
-	messages = append(messages, models.ChatMessage{"Redd", "Fool me once, shame on you. Fool me twice, stop foolin' me.", "https://vignette.wikia.nocookie.net/animalcrossing/images/3/3d/Redd2.gif/revision/latest?cb=20100710004252", "demo-message-2", "ChatMessage"})
-	messages = append(messages, models.ChatMessage{"Kevin", "You just caught me before I was about to go work out weeweewee!", "https://vignette.wikia.nocookie.net/animalcrossing/images/2/20/NH-Kevin_poster.png/revision/latest/scale-to-width-down/100?cb=20200410185817", "demo-message-3", "ChatMessage"})
-	messages = append(messages, models.ChatMessage{"Isabelle", " Isabelle is the mayor's highly capable secretary. She can be forgetful sometimes, but you can always count on her for information about the town. She wears her hair up in a bun that makes her look like a shih tzu. Mostly because she is one! She also has a twin brother named Digby.", "https://dodo.ac/np/images/thumb/7/7b/IsabelleTrophyWiiU.png/200px-IsabelleTrophyWiiU.png", "demo-message-4", "ChatMessage"})
-	messages = append(messages, models.ChatMessage{"Judy", "myohmy, I'm dancing my dreams away.", "https://vignette.wikia.nocookie.net/animalcrossing/images/5/50/NH-Judy_poster.png/revision/latest/scale-to-width-down/100?cb=20200522063219", "demo-message-5", "ChatMessage"})
-	messages = append(messages, models.ChatMessage{"Blathers", "Blathers is an owl with brown feathers. His face is white and he has a yellow beak. His arms are wing shaped and he has yellow talons. His eyes are very big with small black irises. He also has big pink cheek circles on his cheeks. His belly appears to be checkered in diamonds with light brown and white squares, similar to an argyle vest, which is traditionally associated with academia. His green bowtie further alludes to his academic nature.", "https://vignette.wikia.nocookie.net/animalcrossing/images/b/b3/NH-character-Blathers.png/revision/latest?cb=20200229053519", "demo-message-6", "ChatMessage"})
-
-	server := &Server{
-		messages,
-		clients,
-		"/entry", //hardcoded due to the UI requiring this and it is not configurable
-		addCh,
-		delCh,
-		sendAllCh,
-		pingCh,
-		doneCh,
-		errCh,
-	}
-
-	ticker := time.NewTicker(30 * time.Second)
-	go func() {
-		for {
-			select {
-			case <-ticker.C:
-				server.ping()
-			}
-		}
-	}()
-
-	return server
-}
-
 //Add adds a client to the server
-func (s *Server) Add(c *Client) {
+func (s *server) add(c *Client) {
 	s.addCh <- c
 }
 
 //Remove removes a client from the server
-func (s *Server) Remove(c *Client) {
+func (s *server) remove(c *Client) {
 	s.delCh <- c
 }
 
 //SendToAll sends a message to all of the connected clients
-func (s *Server) SendToAll(msg models.ChatMessage) {
+func (s *server) SendToAll(msg models.ChatMessage) {
 	s.sendAllCh <- msg
 }
 
 //Done marks the server as done
-func (s *Server) Done() {
+func (s *server) done() {
 	s.doneCh <- true
 }
 
 //Err handles an error
-func (s *Server) Err(err error) {
+func (s *server) err(err error) {
 	s.errCh <- err
 }
 
-func (s *Server) sendPastMessages(c *Client) {
+func (s *server) sendPastMessages(c *Client) {
 	for _, msg := range s.Messages {
 		c.Write(msg)
 	}
 }
 
-func (s *Server) sendAll(msg models.ChatMessage) {
+func (s *server) sendAll(msg models.ChatMessage) {
 	for _, c := range s.Clients {
 		c.Write(msg)
 	}
 }
 
-func (s *Server) ping() {
+func (s *server) ping() {
 	// fmt.Println("Start pinging....", len(s.clients))
 
 	ping := models.PingMessage{MessageType: "PING"}
@@ -116,8 +77,8 @@ func (s *Server) ping() {
 	}
 }
 
-func (s *Server) onConnection(ws *websocket.Conn) {
-	client := NewClient(ws, s)
+func (s *server) onConnection(ws *websocket.Conn) {
+	client := NewClient(ws)
 
 	defer func() {
 		log.Printf("The client was connected for %s and sent %d messages (%s)", time.Since(client.ConnectedAt), client.MessageCount, client.id)
@@ -127,13 +88,13 @@ func (s *Server) onConnection(ws *websocket.Conn) {
 		}
 	}()
 
-	s.Add(client)
+	s.add(client)
 	client.Listen()
 }
 
 // Listen and serve.
 // It serves client connection and broadcast request.
-func (s *Server) Listen() {
+func (s *server) Listen() {
 	http.Handle(s.pattern, websocket.Handler(s.onConnection))
 
 	log.Printf("Starting the websocket listener on: %s", s.pattern)
@@ -144,18 +105,18 @@ func (s *Server) Listen() {
 		case c := <-s.addCh:
 			s.Clients[c.id] = c
 
-			core.SetClientActive(c.id)
+			s.listener.ClientAdded(c.id)
 			s.sendPastMessages(c)
 
 		// remove a client
 		case c := <-s.delCh:
 			delete(s.Clients, c.id)
-			core.RemoveClient(c.id)
+			s.listener.ClientRemoved(c.id)
 
 		// broadcast a message to all clients
 		case msg := <-s.sendAllCh:
-			log.Println("Sending a message to all:", msg)
 			s.Messages = append(s.Messages, msg)
+			s.listener.MessageSent(msg)
 			s.sendAll(msg)
 
 		case ping := <-s.pingCh:

core/chatListener.go

@@ -0,0 +1,44 @@
+package core
+
+import (
+	"errors"
+
+	log "github.com/sirupsen/logrus"
+
+	"github.com/gabek/owncast/core/chat"
+	"github.com/gabek/owncast/models"
+)
+
+//ChatListenerImpl the implementation of the chat client
+type ChatListenerImpl struct{}
+
+//ClientAdded is for when a client is added the system
+func (cl ChatListenerImpl) ClientAdded(clientID string) {
+	SetClientActive(clientID)
+}
+
+//ClientRemoved is for when a client disconnects/is removed
+func (cl ChatListenerImpl) ClientRemoved(clientID string) {
+	RemoveClient(clientID)
+}
+
+//MessageSent is for when a message is sent
+func (cl ChatListenerImpl) MessageSent(message models.ChatMessage) {
+	log.Printf("Message sent to all: %s", message.String())
+}
+
+//SendMessageToChat sends a message to the chat server
+func SendMessageToChat(message models.ChatMessage) error {
+	if !message.Valid() {
+		return errors.New("invalid chat message; id, author, and body are required")
+	}
+
+	chat.SendMessage(message)
+
+	return nil
+}
+
+//GetAllChatMessages gets all of the chat messages
+func GetAllChatMessages() []models.ChatMessage {
+	return chat.GetMessages()
+}

core/core.go

@@ -8,6 +8,7 @@ import (
 	log "github.com/sirupsen/logrus"
 
 	"github.com/gabek/owncast/config"
+	"github.com/gabek/owncast/core/chat"
 	"github.com/gabek/owncast/core/ffmpeg"
 	"github.com/gabek/owncast/models"
 	"github.com/gabek/owncast/utils"
@@ -37,6 +38,8 @@ func Start() error {
 		return err
 	}
 
+	chat.Setup(ChatListenerImpl{})
+
 	return nil
 }
 

models/chatListener.go

@@ -0,0 +1,8 @@
+package models
+
+//ChatListener represents the listener for the chat server
+type ChatListener interface {
+	ClientAdded(clientID string)
+	ClientRemoved(clientID string)
+	MessageSent(message ChatMessage)
+}

models/chatMessage.go

@@ -2,6 +2,8 @@ package models
 
 //ChatMessage represents a single chat message
 type ChatMessage struct {
+	ClientID string `json:"-"`
+
 	Author      string `json:"author"`
 	Body        string `json:"body"`
 	Image       string `json:"image"`
@@ -14,3 +16,8 @@ type ChatMessage struct {
 func (s ChatMessage) String() string {
 	return s.Author + " says " + s.Body
 }
+
+//Valid checks to ensure the message is valid
+func (s ChatMessage) Valid() bool {
+	return s.Author != "" && s.Body != "" && s.ID != ""
+}

router/router.go

@@ -14,9 +14,8 @@ import (
 
 //Start starts the router for the http, ws, and rtmp
 func Start() error {
-	// websocket server
-	chatServer := chat.NewServer()
-	go chatServer.Listen()
+	// websocket chat server
+	go chat.Start()
 
 	// start the rtmp server
 	go rtmp.Start()
@@ -27,6 +26,9 @@ func Start() error {
 	// status of the system
 	http.HandleFunc("/status", controllers.GetStatus)
 
+	// chat rest api
+	http.HandleFunc("/chat", controllers.GetChatMessages)
+
 	port := config.Config.WebServerPort
 
 	log.Printf("Starting public web server on port: %d", port)