refactor(api): API overhaul (#392)

api/http/templates_handler.go

@@ -0,0 +1,55 @@
+package http
+
+import (
+	"fmt"
+	"github.com/gorilla/mux"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+)
+
+// TemplatesHandler represents an HTTP API handler for managing templates.
+type TemplatesHandler struct {
+	*mux.Router
+	Logger            *log.Logger
+	middleWareService *middleWareService
+	templatesURL      string
+}
+
+// NewTemplatesHandler returns a new instance of TemplatesHandler.
+func NewTemplatesHandler(middleWareService *middleWareService) *TemplatesHandler {
+	h := &TemplatesHandler{
+		Router:            mux.NewRouter(),
+		Logger:            log.New(os.Stderr, "", log.LstdFlags),
+		middleWareService: middleWareService,
+	}
+	h.Handle("/templates", middleWareService.addMiddleWares(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		h.handleGetTemplates(w, r)
+	})))
+	return h
+}
+
+// handleGetTemplates handles GET requests on /templates
+func (handler *TemplatesHandler) handleGetTemplates(w http.ResponseWriter, r *http.Request) {
+	if r.Method != "GET" {
+		handleNotAllowed(w, []string{"GET"})
+		return
+	}
+
+	resp, err := http.Get(handler.templatesURL)
+	if err != nil {
+		log.Print(err)
+		http.Error(w, fmt.Sprintf("Error making request to %s: %s", handler.templatesURL, err.Error()), http.StatusInternalServerError)
+		return
+	}
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		log.Print(err)
+		http.Error(w, "Error reading body from templates URL", http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	w.Write(body)
+}