Creating Movie struct inside internal/data/movies.go to be used in cmd/api/movies.go. Updating the showMovieHandler with the Movie struct.

cmd/api/movies.go

@@ -2,7 +2,9 @@ package main
 
 import (
 	"fmt"
+	"greenlight.craftr.fr/internal/data"
 	"net/http"
+	"time"
 )
 
 // "POST /v1/movies" endpoint.
@@ -19,6 +21,24 @@ func (app *application) showMovieHandler(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
-	// Otherwise, interpolate the movie ID in a placeholder response.
-	fmt.Fprintf(w, "show the details of movie %d\n", id)
+	/*
+		Create a new instance of the Movie struct containing the ID we
+		extracted from the URL and some dummy data. Also notice that we
+		deliberately haven't set a value for the Year field.
+	*/
+	movie := data.Movie{
+		ID:        id,
+		CreatedAt: time.Now(),
+		Title:     "Casablanca",
+		Runtime:   102,
+		Genres:    []string{"drama", "romance", "war"},
+		Version:   1,
+	}
+
+	// Encode the struct to JSON and send it as the HTTP response.
+	err = app.writeJSON(w, http.StatusOK, movie, nil)
+	if err != nil {
+		app.logger.Error(err.Error())
+		http.Error(w, "The server encountered a problem and could not process your request", http.StatusInternalServerError)
+	}
 }

internal/data/movies.go

@@ -0,0 +1,18 @@
+package data
+
+import "time"
+
+// Movie
+/*
+Annotate the Movie struct with struct tags to control how the keys
+appear in the JSON-encoded output.
+*/
+type Movie struct {
+	ID        int64     `json:"id"`
+	CreatedAt time.Time `json:"-"`
+	Title     string    `json:"title"`
+	Year      int32     `json:"year,omitempty"`
+	Runtime   int32     `json:"runtime,omitempty,string"`
+	Genres    []string  `json:"genres,omitempty"`
+	Version   int32     `json:"version"`
+}