remove actions and data integrity
This commit is contained in:
Thanakorn S
@@ -0,0 +1,186 @@
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<?php
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/**
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* ProductManager
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*
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* Encapsulates product and product category operations:
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* - Soft-delete with downstream validation
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*
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* Note: Methods that modify data do NOT manage their own DB transactions.
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* Callers are responsible for wrapping operations in dbTransaction() when atomicity is needed.
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*/
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class ProductManager {
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private $pdo;
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private $company_id;
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public function __construct($pdo, $company_id) {
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$this->pdo = $pdo;
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$this->company_id = $company_id;
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}
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// ─────────────────────────────────────────────────────────────
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// Private helpers
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// ─────────────────────────────────────────────────────────────
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/**
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* Check if a SKU has any active stock across all td_stock_* tables.
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* Returns the first blocking table name found, or null if clear.
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*/
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private function findActiveStock(string $sku): ?string {
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$sth = $this->pdo->prepare(
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"SELECT table_name FROM information_schema.tables
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WHERE table_schema = DATABASE()
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AND table_name LIKE 'td_stock_%'"
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);
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$sth->execute();
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$tables = $sth->fetchAll(PDO::FETCH_COLUMN);
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foreach ($tables as $table) {
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$sth = $this->pdo->prepare(
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"SELECT COUNT(*) FROM `$table`
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WHERE company_id = :company_id
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AND product_sku = :sku"
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);
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$sth->execute([
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':company_id' => $this->company_id,
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':sku' => $sku,
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]);
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if ($sth->fetchColumn() > 0) {
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return $table;
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}
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}
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return null;
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}
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/**
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* Build a log entry array for audit context.
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*/
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private function buildLogEntry(string $action): array {
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return [
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'user_id' => $_SESSION['login_user_id'] ?? null,
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'dt' => date('Y-m-d H:i:s'),
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'login' => isset($_SESSION['otpTime'])
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? date('Y-m-d H:i:s', $_SESSION['otpTime'])
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: null,
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'action' => $action,
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];
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}
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// ─────────────────────────────────────────────────────────────
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// Product category
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// ─────────────────────────────────────────────────────────────
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/**
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* Soft-delete a product category.
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*
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* Blocks if any md_product references this category.
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*
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* @throws Exception if category not found or has dependent products
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*/
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public function deleteCategory(int $category_id): void {
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$sth = $this->pdo->prepare(
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"SELECT id, category, `log` FROM md_product_category
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WHERE company_id = :company_id AND id = :id"
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);
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$sth->execute([
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':company_id' => $this->company_id,
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':id' => $category_id,
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]);
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$row = $sth->fetch(PDO::FETCH_ASSOC);
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if (!$row) {
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throw new Exception("Product category not found.");
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}
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// Block if any product references this category
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$sth = $this->pdo->prepare(
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"SELECT COUNT(*) FROM md_product
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WHERE company_id = :company_id
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AND category = :category_id"
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);
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$sth->execute([
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':company_id' => $this->company_id,
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':category_id' => $category_id,
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]);
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if ($sth->fetchColumn() > 0) {
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throw new Exception(
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"Cannot delete — category \"{$row['category']}\" " .
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"still has products assigned to it."
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);
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}
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// Append delete event to log
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$log = json_decode($row['log'] ?? '[]', true) ?: [];
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$log[] = $this->buildLogEntry('delete');
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// Soft-delete
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$this->pdo->prepare(
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"UPDATE md_product_category
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SET company_id = company_id * -1,
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`log` = :log
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WHERE id = :id AND company_id = :company_id"
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)->execute([
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':log' => json_encode($log),
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':id' => $category_id,
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':company_id' => $this->company_id,
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]);
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}
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// ─────────────────────────────────────────────────────────────
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// Product
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// ─────────────────────────────────────────────────────────────
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/**
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* Soft-delete a product.
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*
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* Blocks if the product SKU has any active stock across any td_stock_* table.
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*
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* @throws Exception if product not found or has active stock
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*/
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public function deleteProduct(int $product_id): void {
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$sth = $this->pdo->prepare(
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"SELECT id, product_name, sku, `log` FROM md_product
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WHERE company_id = :company_id AND id = :id"
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);
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$sth->execute([
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':company_id' => $this->company_id,
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':id' => $product_id,
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]);
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$row = $sth->fetch(PDO::FETCH_ASSOC);
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if (!$row) {
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throw new Exception("Product not found.");
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}
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// Block if active stock exists for this SKU in any warehouse
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$blocking_table = $this->findActiveStock($row['sku']);
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if ($blocking_table !== null) {
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throw new Exception(
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"Cannot delete — \"{$row['product_name']}\" " .
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"still has active stock in the system."
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);
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}
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// Append delete event to log
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$log = json_decode($row['log'] ?? '[]', true) ?: [];
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$log[] = $this->buildLogEntry('delete');
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// Soft-delete
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$this->pdo->prepare(
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"UPDATE md_product
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SET company_id = company_id * -1,
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`log` = :log
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WHERE id = :id AND company_id = :company_id"
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)->execute([
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':log' => json_encode($log),
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':id' => $product_id,
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':company_id' => $this->company_id,
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]);
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}
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}
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