add shopping list and tag management

internal/repository/shopping_list.go

@@ -0,0 +1,83 @@
+package repository
+
+import (
+	"database/sql"
+	"errors"
+	"time"
+
+	"git.juancwu.dev/juancwu/budgit/internal/model"
+	"github.com/jmoiron/sqlx"
+)
+
+var (
+	ErrShoppingListNotFound = errors.New("shopping list not found")
+)
+
+type ShoppingListRepository interface {
+	Create(list *model.ShoppingList) error
+	GetByID(id string) (*model.ShoppingList, error)
+	GetBySpaceID(spaceID string) ([]*model.ShoppingList, error)
+	Update(list *model.ShoppingList) error
+	Delete(id string) error
+}
+
+type shoppingListRepository struct {
+	db *sqlx.DB
+}
+
+func NewShoppingListRepository(db *sqlx.DB) ShoppingListRepository {
+	return &shoppingListRepository{db: db}
+}
+
+func (r *shoppingListRepository) Create(list *model.ShoppingList) error {
+	query := `INSERT INTO shopping_lists (id, space_id, name, created_at, updated_at) VALUES ($1, $2, $3, $4, $5);`
+	_, err := r.db.Exec(query, list.ID, list.SpaceID, list.Name, list.CreatedAt, list.UpdatedAt)
+	return err
+}
+
+func (r *shoppingListRepository) GetByID(id string) (*model.ShoppingList, error) {
+	list := &model.ShoppingList{}
+	query := `SELECT * FROM shopping_lists WHERE id = $1;`
+	err := r.db.Get(list, query, id)
+	if err == sql.ErrNoRows {
+		return nil, ErrShoppingListNotFound
+	}
+	return list, err
+}
+
+func (r *shoppingListRepository) GetBySpaceID(spaceID string) ([]*model.ShoppingList, error) {
+	var lists []*model.ShoppingList
+	query := `SELECT * FROM shopping_lists WHERE space_id = $1 ORDER BY created_at DESC;`
+	err := r.db.Select(&lists, query, spaceID)
+	if err != nil {
+		return nil, err
+	}
+	return lists, nil
+}
+
+func (r *shoppingListRepository) Update(list *model.ShoppingList) error {
+	list.UpdatedAt = time.Now()
+	query := `UPDATE shopping_lists SET name = $1, updated_at = $2 WHERE id = $3;`
+	result, err := r.db.Exec(query, list.Name, list.UpdatedAt, list.ID)
+	if err != nil {
+		return err
+	}
+	rows, err := result.RowsAffected()
+	if err == nil && rows == 0 {
+		return ErrShoppingListNotFound
+	}
+	return err
+}
+
+func (r *shoppingListRepository) Delete(id string) error {
+	query := `DELETE FROM shopping_lists WHERE id = $1;`
+	result, err := r.db.Exec(query, id)
+	if err != nil {
+		return err
+	}
+	rows, err := result.RowsAffected()
+	if err == nil && rows == 0 {
+		return ErrShoppingListNotFound
+	}
+	return err
+}