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)"})
+	}
+}