213 lines
7.4 KiB
Go
213 lines
7.4 KiB
Go
package db
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import (
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"fmt"
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"gestion/models"
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"gorm.io/gorm"
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)
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// GetProductPrice récupère le prix réel d'un produit pour une quantité donnée (legacy)
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func (d *Database) GetProductPrice(name, category string, quantity float64) (float64, error) {
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var result struct {
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Price float64 `gorm:"column:price"`
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}
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err := d.GDB.Raw(`
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SELECT price
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FROM product_prices pp
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INNER JOIN products p ON pp.product_id = p.id
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WHERE LOWER(p.name) = LOWER(?)
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AND LOWER(p.category) = LOWER(?)
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AND pp.quantity <= ?
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ORDER BY pp.quantity DESC
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LIMIT 1`, name, category, quantity).Scan(&result).Error
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if err != nil || result.Price == 0 {
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return 0, fmt.Errorf("prix produit introuvable pour %f %s: %w", quantity, name, err)
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}
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return result.Price, nil
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}
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// GetAllProductsInBasket récupère tous les produits du panier d'un utilisateur
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func (d *Database) GetAllProductsInBasket(username string) ([]models.Panier, error) {
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var baskets []models.Panier
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err := d.GDB.Raw(`
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SELECT b.id, b.username, b.product_id, b.quantity, b.price, b.created_at,
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p.name as product_name, p.category, p.description
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FROM baskets b
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INNER JOIN products p ON b.product_id = p.id
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WHERE b.username = ?
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ORDER BY b.created_at DESC`, username).Scan(&baskets).Error
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if err != nil {
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return nil, fmt.Errorf("erreur lors de la récupération du panier: %w", err)
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}
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return baskets, nil
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}
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func (d *Database) DecrementAndAddToBasket(username string, productID int, quantity float64) (*models.Panier, error) {
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var basket models.Panier
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err := d.GDB.Transaction(func(tx *gorm.DB) error {
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var currentStock float64
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if err := tx.Raw(`SELECT stock FROM products WHERE id = ? FOR UPDATE`, productID).Scan(¤tStock).Error; err != nil {
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return fmt.Errorf("erreur lecture stock: %w", err)
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}
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if currentStock < quantity {
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return fmt.Errorf("stock insuffisant")
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}
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result := tx.Exec(`UPDATE products SET stock = stock - ? WHERE id = ?`, quantity, productID)
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if result.Error != nil {
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return fmt.Errorf("erreur stock: %w", result.Error)
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}
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var priceResult struct {
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Price float64 `gorm:"column:price"`
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}
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if err := tx.Raw(`
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SELECT price FROM product_prices
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WHERE product_id = ? AND quantity <= ? AND active_price = true
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ORDER BY quantity DESC LIMIT 1`,
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productID, quantity).Scan(&priceResult).Error; err != nil || priceResult.Price == 0 {
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return fmt.Errorf("prix introuvable pour product_id=%d qty=%.3f", productID, quantity)
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}
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var existing struct {
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ID int `gorm:"column:id"`
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Quantity float64 `gorm:"column:quantity"`
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Price float64 `gorm:"column:price"`
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}
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tx.Raw(`SELECT id, quantity, price FROM baskets WHERE username = ? AND product_id = ?`,
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username, productID).Scan(&existing)
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if existing.ID != 0 {
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return tx.Raw(`
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UPDATE baskets SET quantity = ?, price = ?, created_at = CURRENT_TIMESTAMP
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WHERE id = ? RETURNING id, username, product_id, quantity, price, created_at`,
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existing.Quantity+quantity, existing.Price+priceResult.Price,
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existing.ID).Scan(&basket).Error
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}
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return tx.Raw(`
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INSERT INTO baskets (username, product_id, quantity, price, created_at)
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VALUES (?, ?, ?, ?, CURRENT_TIMESTAMP)
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RETURNING id, username, product_id, quantity, price, created_at`,
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username, productID, quantity, priceResult.Price).Scan(&basket).Error
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})
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if err != nil {
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return nil, err
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}
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return &basket, nil
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}
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// DeleteProductFromBasket supprime un produit spécifique du panier et restitue le stock.
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func (d *Database) DeleteProductFromBasket(basketID int) error {
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return d.GDB.Transaction(func(tx *gorm.DB) error {
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var item struct {
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ProductID int `gorm:"column:product_id"`
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Quantity float64 `gorm:"column:quantity"`
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}
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if err := tx.Raw(`SELECT product_id, quantity FROM baskets WHERE id = ? FOR UPDATE`, basketID).Scan(&item).Error; err != nil {
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return fmt.Errorf("produit non trouvé dans le panier")
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}
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if item.ProductID == 0 {
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return fmt.Errorf("produit non trouvé dans le panier")
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}
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if err := tx.Exec(`UPDATE products SET stock = stock + ? WHERE id = ?`,
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item.Quantity, item.ProductID).Error; err != nil {
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return fmt.Errorf("erreur restitution stock: %w", err)
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}
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result := tx.Exec(`DELETE FROM baskets WHERE id = ?`, basketID)
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if result.Error != nil {
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return fmt.Errorf("erreur lors de la suppression du produit: %w", result.Error)
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}
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if result.RowsAffected == 0 {
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return fmt.Errorf("produit non trouvé dans le panier")
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}
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return nil
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})
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}
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// ClearBasket vide complètement le panier d'un utilisateur et restitue les stocks.
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func (d *Database) ClearBasket(username string) error {
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return d.GDB.Transaction(func(tx *gorm.DB) error {
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var items []struct {
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ProductID int `gorm:"column:product_id"`
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Quantity float64 `gorm:"column:quantity"`
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}
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if err := tx.Raw(`SELECT product_id, quantity FROM baskets WHERE username = ? FOR UPDATE`, username).Scan(&items).Error; err != nil {
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return fmt.Errorf("erreur lecture panier: %w", err)
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}
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if len(items) == 0 {
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return nil
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}
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if err := tx.Exec(`
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UPDATE products p
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SET stock = stock + b.quantity
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FROM baskets b
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WHERE b.username = ? AND b.product_id = p.id`, username).Error; err != nil {
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return fmt.Errorf("erreur restitution stock: %w", err)
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}
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if err := tx.Exec(`DELETE FROM baskets WHERE username = ?`, username).Error; err != nil {
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return fmt.Errorf("erreur lors du vidage du panier: %w", err)
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}
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return nil
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})
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}
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// ClearBasketOnCheckout vide le panier après commande validée SANS restituer le stock.
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func (d *Database) ClearBasketOnCheckout(username string) error {
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return d.GDB.Exec(`DELETE FROM baskets WHERE username = ?`, username).Error
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}
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func (d *Database) GetBasketItemOwner(basketID int) (string, error) {
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var username string
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err := d.GDB.Raw(`SELECT username FROM baskets WHERE id = ?`, basketID).Scan(&username).Error
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if err != nil {
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return "", err
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}
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if username == "" {
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return "", fmt.Errorf("article non trouvé")
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}
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return username, nil
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}
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// GetUnavailableBasketItems retourne les noms des produits du panier dont tous les prix ont été désactivés.
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func (d *Database) GetUnavailableBasketItems(username string) ([]string, error) {
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var names []string
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err := d.GDB.Raw(`
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SELECT DISTINCT p.name
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FROM baskets b
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INNER JOIN products p ON b.product_id = p.id
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WHERE b.username = ?
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AND NOT EXISTS (
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SELECT 1 FROM product_prices pp
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WHERE pp.product_id = b.product_id
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AND pp.quantity <= b.quantity
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AND pp.active_price = true
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)`, username).Scan(&names).Error
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if err != nil {
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return nil, fmt.Errorf("erreur vérification disponibilité: %w", err)
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}
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return names, nil
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}
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// GetReservedQuantityInBaskets retourne la somme des quantités d'un produit dans tous les paniers actifs.
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func (d *Database) GetReservedQuantityInBaskets(productID int) (float64, error) {
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var total float64
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err := d.GDB.Raw(`SELECT COALESCE(SUM(quantity), 0) FROM baskets WHERE product_id = ?`, productID).Scan(&total).Error
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if err != nil {
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return 0, fmt.Errorf("erreur lecture réservations panier: %w", err)
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}
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return total, nil
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}
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func (d *Database) GetBasketItems(username string) ([]map[string]any, error) {
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var items []map[string]any
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if err := d.GDB.Raw(`SELECT product_id, quantity::float8 as quantity, price::float8 as price FROM baskets WHERE username = ?`,
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username).Scan(&items).Error; err != nil {
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return nil, err
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}
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return items, nil
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}
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