ch9.2-9.3

cmd/api/movies.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
+	"strconv"
 
 	"gitea.local.lab/Lbenedar/greenlight/internal/data"
 	"gitea.local.lab/Lbenedar/greenlight/internal/validator"
@@ -93,6 +94,13 @@ func (app *application) updateMovieHandler(w http.ResponseWriter, r *http.Reques
 		return
 	}
 
+	if r.Header.Get("X-Expected-Version") != "" {
+		if strconv.FormatInt(int64(movie.Version), 32) != r.Header.Get("X-Expected-Version") {
+			app.editConflictResponse(w, r)
+			return
+		}
+	}
+
 	var input struct {
 		Title   *string       `json:"title"`
 		Year    *int32        `json:"year"`
@@ -165,3 +173,39 @@ func (app *application) deleteMovieHandler(w http.ResponseWriter, r *http.Reques
 		app.serverErrorResponse(w, r, err)
 	}
 }
+
+func (app *application) listMoviesHandler(w http.ResponseWriter, r *http.Request) {
+	var input struct {
+		Title  string
+		Genres []string
+		data.Filters
+	}
+
+	v := validator.New()
+
+	qs := r.URL.Query()
+
+	input.Title = app.readString(qs, "title", "")
+	input.Genres = app.readCSV(qs, "genres", []string{})
+	input.Filters.Page = app.readInt(qs, "page", 1, v)
+	input.Filters.PageSize = app.readInt(qs, "page_size", 20, v)
+	input.Filters.Sort = app.readString(qs, "sort", "id")
+
+	input.Filters.SortSafelist = []string{"id", "title", "year", "runtime", "-id", "-title", "-year", "-runtime"}
+
+	if data.ValidateFilters(v, input.Filters); !v.Valid() {
+		app.failedValidationResponse(w, r, v.Errors)
+		return
+	}
+
+	movies, err := app.models.Movies.GetAll(input.Title, input.Genres, input.Filters)
+	if err != nil {
+		app.serverErrorResponse(w, r, err)
+		return
+	}
+
+	err = app.writeJSON(w, http.StatusOK, envelope{"movies": movies}, nil)
+	if err != nil {
+		app.serverErrorResponse(w, r, err)
+	}
+}