refactors data access layer to use pop ORM for eager loading, adds book titles rented to renters in response body

bookish-server/cmd/http/rental_handlers.go

@@ -0,0 +1,76 @@
+package http
+
+import (
+	"errors"
+	"net/http"
+
+	bookish "github.com/davidlick/bookish/bookish-server"
+	"github.com/davidlick/bookish/bookish-server/internal"
+	"github.com/davidlick/bookish/bookish-server/mysql"
+	"github.com/davidlick/bookish/bookish-server/rental"
+	"github.com/gobuffalo/uuid"
+)
+
+// checkoutBook is used to checkout a book for a renter.
+func (s *Server) checkoutBook(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	renter, ok := ctx.Value(internal.CtxRenter).(bookish.Renter)
+	if !ok {
+		http.Error(w, http.StatusText(http.StatusUnprocessableEntity), http.StatusUnprocessableEntity)
+		return
+	}
+
+	bookTitle, ok := ctx.Value(internal.CtxBookTitle).(string)
+	if !ok {
+		http.Error(w, http.StatusText(http.StatusUnprocessableEntity), http.StatusUnprocessableEntity)
+		return
+	}
+
+	id, err := uuid.FromString(renter.ID)
+	if err != nil {
+		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+		return
+	}
+
+	err = s.Rentals.CheckoutBook(id, bookTitle)
+	if err != nil {
+		if errors.Is(rental.ErrUnavailableBook, err) {
+			http.Error(w, http.StatusText(http.StatusForbidden), http.StatusForbidden)
+			return
+		}
+
+		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+		return
+	}
+}
+
+// returnBook returns a book for a renter.
+func (s *Server) returnBook(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	renter, ok := ctx.Value(internal.CtxRenter).(bookish.Renter)
+	if !ok {
+		http.Error(w, http.StatusText(http.StatusUnprocessableEntity), http.StatusUnprocessableEntity)
+		return
+	}
+
+	bookTitle, ok := ctx.Value(internal.CtxBookTitle).(string)
+	if !ok {
+		http.Error(w, http.StatusText(http.StatusUnprocessableEntity), http.StatusUnprocessableEntity)
+		return
+	}
+
+	id, err := uuid.FromString(renter.ID)
+	if err != nil {
+		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+		return
+	}
+
+	err = s.Rentals.ReturnBook(id, bookTitle)
+	if err != nil && errors.Is(mysql.ErrNotFound, err) {
+		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+		return
+	} else if err != nil {
+		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+		return
+	}
+}