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recipes_router.go
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/
recipes_router.go
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package main
import (
"database/sql"
"encoding/json"
"errors"
"github.com/gorilla/mux"
"net/http"
"strconv"
)
type RecipesRouter struct {
Subrouter *mux.Router
DB *sql.DB
}
func (rr *RecipesRouter) Route(router *mux.Router) {
rr.Subrouter = router.PathPrefix("/recipes").Subrouter()
rr.Subrouter.HandleFunc("", rr.ListRecipes).Methods("GET")
rr.Subrouter.HandleFunc("", rr.CreateRecipe).Methods("POST")
rr.Subrouter.HandleFunc("/{id:[0-9]+}", rr.GetRecipe).Methods("GET")
rr.Subrouter.HandleFunc("/{id:[0-9]+}", rr.UpdateRecipe).Methods("PUT")
rr.Subrouter.HandleFunc("/{id:[0-9]+}", rr.DeleteRecipe).Methods("DELETE")
// HARDCODED
rr.Subrouter.HandleFunc("/list", rr.listHardCoded).Methods("GET")
rr.Subrouter.HandleFunc("/single", rr.getHardCoded).Methods("GET")
}
func (rr *RecipesRouter) ListRecipes(w http.ResponseWriter, r *http.Request) {
// limit to 10 recipes for now
recipes, err := getRecipes(rr.DB, 0, 10)
if err != nil {
respondWithError(w, http.StatusInternalServerError, err)
}
respondWithJSON(w, http.StatusOK, recipes)
}
func (rr *RecipesRouter) CreateRecipe(w http.ResponseWriter, r *http.Request) {
var rec recipe
decoder := json.NewDecoder(r.Body)
if err := decoder.Decode(&rec); err != nil {
respondWithError(w, http.StatusBadRequest, errors.New("Invalid request payload"))
return
}
defer r.Body.Close()
if err := rec.createRecipe(rr.DB); err != nil {
respondWithError(w, http.StatusInternalServerError, err)
return
}
respondWithJSON(w, http.StatusCreated, rec)
}
func (rr *RecipesRouter) GetRecipe(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
id, err := strconv.Atoi(vars["id"])
if err != nil {
respondWithError(w, http.StatusBadRequest, errors.New("Invalid recipe ID"))
return
}
rec := recipe{ID: id}
if err := rec.getRecipe(rr.DB); err != nil {
switch err {
case sql.ErrNoRows:
respondWithError(w, http.StatusNotFound, errors.New("Recipe not found"))
default:
respondWithError(w, http.StatusInternalServerError, err)
}
return
}
respondWithJSON(w, http.StatusOK, rec)
}
func (rr *RecipesRouter) UpdateRecipe(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
id, err := strconv.Atoi(vars["id"])
if err != nil {
respondWithError(w, http.StatusBadRequest, errors.New("Invalid recipe ID"))
return
}
var rec recipe
decoder := json.NewDecoder(r.Body)
if err := decoder.Decode(&rec); err != nil {
respondWithError(w, http.StatusInternalServerError, err)
return
}
defer r.Body.Close()
rec.ID = id
if err := rec.updateRecipe(rr.DB); err != nil {
respondWithError(w, http.StatusInternalServerError, err)
return
}
respondWithJSON(w, http.StatusOK, rec)
}
func (rr *RecipesRouter) DeleteRecipe(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
id, err := strconv.Atoi(vars["id"])
if err != nil {
respondWithError(w, http.StatusBadRequest, errors.New("Invalid recipe ID"))
return
}
rec := recipe{ID: id}
if err := rec.deleteRecipe(rr.DB); err != nil {
respondWithError(w, http.StatusBadRequest, err)
return
}
respondWithJSON(w, http.StatusOK, map[string]string{"data": "success"})
}
func (rr *RecipesRouter) listHardCoded(w http.ResponseWriter, r *http.Request) {
data := []byte(`{
"recipes": [{
"recipeId": 1,
"recipeImageUrl": "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSCQaBD-kga2C-NKq0WSRWAPouX-dNFeCKntpHrKhs58hV36t93",
"recipeName": "Seared Ahi Tuna Tacos With Guacamole"
}, {
"recipeId": 2,
"recipeImageUrl": "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSCQaBD-kga2C-NKq0WSRWAPouX-dNFeCKntpHrKhs58hV36t93",
"recipeName": "Chicken Tikki Masala"
}]
}
`)
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
w.Write(data)
}
func (rr *RecipesRouter) getHardCoded(w http.ResponseWriter, r *http.Request) {
data := []byte(`
{
"recipeId": 1,
"recipeImageUrl": "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSCQaBD-kga2C-NKq0WSRWAPouX-dNFeCKntpHrKhs58hV36t93",
"recipeName": "Seared Ahi Tuna Tacos With Guacamole"
}
`)
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
w.Write(data)
}