Refactoring validation to belong to model

internal/repository/errors.go

@@ -1,35 +0,0 @@
-package repository
-
-import (
-	"fmt"
-
-	"git.hrafn.xyz/aether/notes/internal/models"
-)
-
-type EmptyContent struct {}
-type EmptyTitle struct {}
-type NoOP struct {}
-type EmptyUpdate struct{}
-type TitleOverflow struct {
-	length int
-}
-
-func (e *EmptyContent) Error() string {
-	return "content cannot be empty"
-}
-
-func (e *EmptyTitle) Error() string {
-	return "title cannot be empty"
-}
-
-func (e *NoOP) Error() string {
-	return "no operation required"
-}
-
-func (e *EmptyUpdate) Error() string {
-	return "update cannot be empty"
-}
-
-func (e *TitleOverflow) Error() string {
-	return fmt.Sprintf("title max length %d, %d provided", models.NoteTitleMaxLength, e.length)
-}

internal/repository/notes.go

@@ -29,7 +29,7 @@ func (r *NoteRepository) CreateNote(ctx context.Context, title string, content s
 		Content:    content,
 		LastUpdate: time.Now(),
 	}
-	if err := isNoteVaid(note); err != nil {
+	if err := note.Validate(); err != nil {
 		return models.Note{}, err
 	}
 	return r.store.SaveNote(ctx, note)
@@ -48,7 +48,7 @@ func (r *NoteRepository) ListNotes(ctx context.Context) ([]models.Note, error) {
 // UpdateNote updates the content of an existing note.
 func (r *NoteRepository) UpdateNote(ctx context.Context, id int, update NoteUpdate) (models.Note, error) {
 	if update.Content == "" && update.Title == "" {
-		return models.Note{}, &EmptyUpdate{}
+		return models.Note{}, &ErrEmptyUpdate{}
 	}
 	note, err := r.store.GetNoteByID(ctx, id)
 	if err != nil {
@@ -56,7 +56,7 @@ func (r *NoteRepository) UpdateNote(ctx context.Context, id int, update NoteUpda
 	}
 
 	if update.Content == note.Content && update.Title == note.Title {
-		return models.Note{}, &NoOP{}
+		return models.Note{}, &ErrNoOP{}
 	}
 
 	if update.Content != "" {
@@ -65,8 +65,8 @@ func (r *NoteRepository) UpdateNote(ctx context.Context, id int, update NoteUpda
 	if update.Title != "" {
 		note.Title = update.Title
 	}
-	
-	if err := isNoteVaid(note); err != nil {
+
+	if err := note.Validate(); err != nil {
 		return models.Note{}, err
 	}
 
@@ -78,20 +78,3 @@ func (r *NoteRepository) UpdateNote(ctx context.Context, id int, update NoteUpda
 func (r *NoteRepository) DeleteNote(ctx context.Context, id int) error {
 	return r.store.DeleteNoteByID(ctx, id)
 }
-
-
-func isNoteVaid(note models.Note) error {
-	if note.Title == "" {
-		return &EmptyTitle{}
-	}
-	if note.Content == "" {
-		return &EmptyContent{}
-	}
-	if titleLen := len(note.Title); titleLen > models.NoteTitleMaxLength {
-		return &TitleOverflow{
-			length: titleLen,
-		}
-	}
-
-	return nil
-}

internal/repository/repository_errors.go

@@ -0,0 +1,12 @@
+package repository
+
+type ErrNoOP struct{}
+type ErrEmptyUpdate struct{}
+
+func (e *ErrNoOP) Error() string {
+	return "no operation required"
+}
+
+func (e *ErrEmptyUpdate) Error() string {
+	return "update cannot be empty"
+}