main.go

package main

import (
	"fmt"
	"log"
	"encoding/json"
	"math/rand"
	"net/http"
	"strconv"
	"github.com/gorilla/mux"
)

type Movie struct{
	ID string `json:"id"`
	Isbn string `json:"isbn"`
	Title string `json:"title"`
	Director *Director `json:"director"`
}

type Director struct{
	Firstname string `json:"firstname"`
	Lastname string `json:"lastname"`
}

var movies []Movie

func getMovies(w http.ResponseWriter, r *http.Request){
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(movies)
}

func deleteMovie(w http.ResponseWriter, r *http.Request){
	w.Header().Set("Content-Type", "application/json")
	params := mux.Vars(r)

	for index, item := range movies {
		if item.ID == params["id"]{
			movies = append(movies[:index], movies[index+1:]...)
			break
		}
	}

	json.NewEncoder(w).Encode(movies)
}

func getMovie(w http.ResponseWriter, r *http.Request){
	w.Header().Set("Content-Type", "application/json")
	params := mux.Vars(r)

	for _, item := range movies{
		if item.ID == params["id"]{
			json.NewEncoder(w).Encode(item)
			return
		}
	}
}

func createMovie(w http.ResponseWriter, r *http.Request){
	w.Header().Set("Content-Type", "application/json")

	var movie Movie
	_ = json.NewDecoder(r.Body).Decode(&movie)
	movie.ID = strconv.Itoa(rand.Intn(100000000))
	movies = append(movies, movie)

	json.NewEncoder(w).Encode(movie)
}

func updateMovie(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")

	params := mux.Vars(r)

	for index, item := range movies{
		if item.ID == params["id"]{
			movies = append(movies[:index], movies[index + 1:]...)
			var movie Movie
			_ = json.NewDecoder(r.Body).Decode(&movie)
			movie.ID = params["id"]
			movies = append(movies, movie)
			json.NewEncoder(w).Encode(movie)
			return
		}
	}
}



func main(){
	r := mux.NewRouter()

	movies = append(movies, 
		Movie{
			ID: "1",
			Isbn: "438227",
			Title: "Movie One",
			Director: &Director{
				Firstname: "John",
				Lastname: "Doe",
			},
		},
	)

	movies = append(movies, 
		Movie{
			ID: "2",
			Isbn: "45455",
			Title: "Movie Two",
			Director: &Director{
				Firstname: "Steve",
				Lastname: "Smith",
			},
		},
	)

	r.HandleFunc("/movies", getMovies).Methods("GET")
	r.HandleFunc("/movies/{id}", getMovie).Methods("GET")
	r.HandleFunc("/movies", createMovie).Methods("POST")
	r.HandleFunc("/movies/{id}", createMovie).Methods("POST")
	r.HandleFunc("/movies/{id}", updateMovie).Methods("PUT")
	r.HandleFunc("/movies/{id}", deleteMovie).Methods("DELETE")

	fmt.Printf("Starting server at port 8002")
	log.Fatal(http.ListenAndServe(":8002", r))
}