feat: new handlers - WIP

api/handler/loan.go

@@ -0,0 +1,68 @@
+package handler
+
+import (
+	"net/http"
+
+	"github.com/eminetto/clean-architecture-go-v2/domain/entity/user"
+
+	"github.com/eminetto/clean-architecture-go-v2/domain/loan"
+
+	"github.com/eminetto/clean-architecture-go-v2/domain"
+
+	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/domain/entity/book"
+
+	"github.com/codegangsta/negroni"
+	"github.com/gorilla/mux"
+)
+
+func borrow(bService book.UseCase, uService user.UseCase, loanService loan.UseCase) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		errorMessage := "Error borrowing book"
+		vars := mux.Vars(r)
+		bID, err := entity.StringToID(vars["book_id"])
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(errorMessage))
+			return
+		}
+		b, err := bService.Get(bID)
+		if err != nil && err != domain.ErrNotFound {
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(errorMessage))
+			return
+		}
+		uID, err := entity.StringToID(vars["user_id"])
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(errorMessage))
+			return
+		}
+
+		u, err := uService.Get(uID)
+		if err != nil && err != domain.ErrNotFound {
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(errorMessage))
+			return
+		}
+
+		err = loanService.Borrow(u, b)
+		if err != nil && err != domain.ErrNotFound {
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(errorMessage))
+			return
+		}
+		w.WriteHeader(http.StatusCreated)
+	})
+}
+
+//MakeLoanHandlers make url handlers
+func MakeLoanHandlers(r *mux.Router, n negroni.Negroni, bService book.UseCase, uService user.UseCase, loanService loan.UseCase) {
+	r.Handle("/v1/loan/borrow/{book_id}/{user_id}", n.With(
+		negroni.Wrap(borrow(bService, uService, loanService)),
+	)).Methods("GET", "OPTIONS").Name("borrow")
+
+	//r.Handle("/v1/book/{book_id}/return", n.With(
+	//	negroni.Wrap(returnBook(service)),
+	//)).Methods("GET", "OPTIONS").Name("returnBook")
+}