Added new endpoints to modify settings in-memory (#517)

* Added new endpoints to modify settings in-memory

* Added missing controllers

controllers/admin/changeStreamTitle.go

@@ -0,0 +1,35 @@
+package admin
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/owncast/owncast/config"
+	"github.com/owncast/owncast/controllers"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// ChangeStreamTitle will change the stream key (in memory).
+func ChangeStreamTitle(w http.ResponseWriter, r *http.Request) {
+	if r.Method != "POST" {
+		controllers.WriteSimpleResponse(w, false, r.Method+" not supported")
+		return
+	}
+
+	decoder := json.NewDecoder(r.Body)
+	var request changeStreamTitleRequest
+	err := decoder.Decode(&request)
+	if err != nil {
+		log.Errorln(err)
+		controllers.WriteSimpleResponse(w, false, "")
+		return
+	}
+
+	config.Config.InstanceDetails.Title = request.Title
+	controllers.WriteSimpleResponse(w, true, "changed")
+}
+
+type changeStreamTitleRequest struct {
+	Title string `json:"title"`
+}