feat: validation, postgress connection,

projects/greenlight/internal/data/movies.go

@@ -2,6 +2,8 @@ package data
 
 import (
 	"time"
+
+	"greenlight.debuggingjon.dev/internal/validator"
 )
 
 type Movie struct {
@@ -13,3 +15,20 @@ type Movie struct {
 	Genres    []string  `json:"genres,omitempty"`  // Add the omitempty directive
 	Version   int32     `json:"version"`
 }
+
+func ValidateMovie(v *validator.Validator, movie *Movie) {
+	v.Check(movie.Title != "", "title", "must be provided")
+	v.Check(len(movie.Title) <= 500, "title", "must not be more than 500 bytes long")
+
+	v.Check(movie.Year != 0, "year", "must be provided")
+	v.Check(movie.Year >= 1888, "year", "must be greater than 1888")
+	v.Check(movie.Year <= int32(time.Now().Year()), "year", "must not be in the future")
+
+	v.Check(movie.Runtime != 0, "runtime", "must be provided")
+	v.Check(movie.Runtime > 0, "runtime", "must be a positive integer")
+
+	v.Check(movie.Genres != nil, "genres", "must be provided")
+	v.Check(len(movie.Genres) >= 1, "genres", "must contain at least 1 genre")
+	v.Check(len(movie.Genres) <= 5, "genres", "must not contain more than 5 genres")
+	v.Check(validator.Unique(movie.Genres), "genres", "must not contain duplicate values")
+}