fix: Update version to 1.2.6 in plugin header and constant definition

.github/workflows/release.yml

@@ -9,6 +9,7 @@ on:
   push:
     branches:
       - main
+      - master
     paths:
       - 'siti-stock-plugin.php'
       - 'includes/**'
@@ -27,11 +28,14 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Fetch tags
+        run: git fetch --tags origin
+
       - name: Determine plugin version
         id: meta
         run: |
-          VERSION=$(grep -E "^\\s*\\*\\s*Version:" -m 1 siti-stock-plugin.php | sed -E 's/.*Version:\\s*//')
-          VERSION=$(echo "$VERSION" | tr -d '\\r')
+          VERSION=$(grep -E "^[[:space:]]*\\*[[:space:]]*Version:" -m 1 siti-stock-plugin.php | sed -E 's/.*Version:[[:space:]]*//')
+          VERSION=$(echo "$VERSION" | tr -d '\\r' | xargs)
           if [ -z "$VERSION" ]; then
             echo "::error::Kon pluginversie niet bepalen."
             exit 1
@@ -42,12 +46,21 @@ jobs:
         id: tagcheck
         run: |
           TAG="v${{ steps.meta.outputs.version }}"
-          if git rev-parse "$TAG" >/dev/null 2>&1; then
+          if git show-ref --tags --verify --quiet "refs/tags/$TAG"; then
             echo "exists=true" >> "$GITHUB_OUTPUT"
           else
             echo "exists=false" >> "$GITHUB_OUTPUT"
           fi
 
+      - name: Maak of update git-tag
+        if: steps.tagcheck.outputs.exists == 'false'
+        run: |
+          TAG="v${{ steps.meta.outputs.version }}"
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git tag "$TAG" "$GITHUB_SHA"
+          git push origin "$TAG"
+
       - name: Tag bestaat al – workflow afronden
         if: steps.tagcheck.outputs.exists == 'true'
         run: |
@@ -93,10 +106,14 @@ jobs:
 
       - name: Maak GitHub release
         if: steps.tagcheck.outputs.exists == 'false'
-        uses: softprops/action-gh-release@v2
+        uses: ncipollo/release-action@v1
         with:
-          tag_name: v${{ steps.meta.outputs.version }}
+          tag: v${{ steps.meta.outputs.version }}
+          commit: ${{ github.sha }}
           name: Siti Stock Plugin v${{ steps.meta.outputs.version }}
           body: ${{ steps.releasebody.outputs.text }}
-          generate_release_notes: true
-          files: ${{ steps.package.outputs.asset_path }}
+          artifacts: ${{ steps.package.outputs.asset_path }}
+          generateReleaseNotes: true
+          token: ${{ secrets.GITHUB_TOKEN }}
+          allowUpdates: true
+          updateOnlyUnreleased: true

assets/css/order-admin.css

@@ -0,0 +1,41 @@
+.siti-stock-order-item-sources {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+  align-items: center;
+  margin: 4px 0 6px;
+  font-size: 12px;
+}
+
+.siti-stock-order-item-sources__label {
+  font-weight: 600;
+  color: #1d2327;
+  margin-right: 4px;
+}
+
+.siti-stock-order-item-sources__badge {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  padding: 2px 8px;
+  border-radius: 999px;
+  background: #f1f5f9;
+  color: #1d2327;
+}
+
+.siti-stock-order-item-sources__badge .dashicons {
+  font-size: 13px;
+  width: 13px;
+  height: 13px;
+  line-height: 13px;
+}
+
+.siti-stock-order-item-sources__badge.is-local {
+  background: #e6f8ef;
+  color: #17633d;
+}
+
+.siti-stock-order-item-sources__badge.is-external {
+  background: #f1ecff;
+  color: #3e2a85;
+}

includes/class-siti-stock-admin.php

@@ -24,6 +24,11 @@ class Siti_Stock_Admin {
 	 */
 	private $notices;
 
+	/**
+	 * @var Siti_Stock_Supplier_Exports
+	 */
+	private $supplier_exports;
+
 	/**
 	 * Cached settings snapshot for rendering.
 	 *
@@ -35,11 +40,13 @@ class Siti_Stock_Admin {
 	 * @param Siti_Stock_Settings        $settings Settings repository.
 	 * @param Siti_Stock_Sync_Controller $sync_controller Sync controller.
 	 * @param Siti_Stock_Admin_Notices   $notices Notice handler.
+	 * @param Siti_Stock_Supplier_Exports $supplier_exports Supplier exports handler.
 	 */
-	public function __construct( Siti_Stock_Settings $settings, Siti_Stock_Sync_Controller $sync_controller, Siti_Stock_Admin_Notices $notices ) {
+	public function __construct( Siti_Stock_Settings $settings, Siti_Stock_Sync_Controller $sync_controller, Siti_Stock_Admin_Notices $notices, Siti_Stock_Supplier_Exports $supplier_exports ) {
 		$this->settings        = $settings;
 		$this->sync_controller = $sync_controller;
 		$this->notices         = $notices;
+		$this->supplier_exports = $supplier_exports;
 	}
 
 	/**
@@ -160,6 +167,15 @@ class Siti_Stock_Admin {
 			array( $this, 'render_settings_page' ),
 			'dashicons-products'
 		);
+
+		add_submenu_page(
+			'siti-stock-plugin',
+			__( 'Stock updates', 'siti-stock-plugin' ),
+			__( 'Stock updates', 'siti-stock-plugin' ),
+			'manage_options',
+			'siti-stock-plugin-stock-updates',
+			array( $this, 'render_stock_updates_page' )
+		);
 	}
 
 	/**
@@ -168,7 +184,12 @@ class Siti_Stock_Admin {
 	 * @param string $hook Hook suffix.
 	 */
 	public function enqueue_admin_assets( $hook ) {
-		if ( 'toplevel_page_siti-stock-plugin' !== $hook ) {
+		$pages = array(
+			'toplevel_page_siti-stock-plugin',
+			'siti-stock-plugin_page_siti-stock-plugin-stock-updates',
+		);
+
+		if ( ! in_array( $hook, $pages, true ) ) {
 			return;
 		}
 
@@ -241,6 +262,112 @@ class Siti_Stock_Admin {
 		<?php
 	}
 
+	/**
+	 * Render stock updates admin page.
+	 */
+	public function render_stock_updates_page() {
+		if ( ! current_user_can( 'manage_options' ) ) {
+			return;
+		}
+
+		$suppliers   = $this->supplier_exports->get_supplier_configs();
+		$admin_email = get_option( 'admin_email' );
+		?>
+		<div class="wrap siti-stock-settings">
+			<h1><?php esc_html_e( 'Stock updates', 'siti-stock-plugin' ); ?></h1>
+			<p class="description">
+				<?php esc_html_e( 'Plan automatische e-mails met de bestellingen per leverancier in CSV-formaat.', 'siti-stock-plugin' ); ?>
+				<?php
+				if ( $admin_email ) {
+					printf(
+						/* translators: %s admin email */
+						esc_html__( 'E-mails worden verzonden naar %s.', 'siti-stock-plugin' ),
+						esc_html( $admin_email )
+					);
+				}
+				?>
+			</p>
+
+			<?php if ( empty( $suppliers ) ) : ?>
+				<p><?php esc_html_e( 'Er zijn momenteel geen leveranciers gevonden.', 'siti-stock-plugin' ); ?></p>
+			<?php else : ?>
+				<form method="post" action="<?php echo esc_url( admin_url( 'admin-post.php' ) ); ?>">
+					<?php wp_nonce_field( 'siti_stock_save_supplier_schedule' ); ?>
+					<input type="hidden" name="action" value="siti_stock_save_supplier_schedule" />
+
+					<table class="widefat fixed striped">
+						<thead>
+							<tr>
+								<th><?php esc_html_e( 'Leverancier', 'siti-stock-plugin' ); ?></th>
+								<th><?php esc_html_e( 'Tijd (24u)', 'siti-stock-plugin' ); ?></th>
+								<th><?php esc_html_e( 'Automatisch verzenden', 'siti-stock-plugin' ); ?></th>
+							</tr>
+						</thead>
+						<tbody>
+							<?php foreach ( $suppliers as $key => $config ) : ?>
+								<tr>
+									<td><?php echo esc_html( isset( $config['supplier'] ) ? $config['supplier'] : $key ); ?></td>
+									<td>
+										<input
+											type="time"
+											name="<?php echo esc_attr( 'supplier_exports[' . $key . '][time]' ); ?>"
+											value="<?php echo esc_attr( isset( $config['time'] ) ? $config['time'] : '09:00' ); ?>"
+											step="60"
+											class="regular-text"
+										/>
+									</td>
+									<td>
+										<label>
+											<input
+												type="checkbox"
+												name="<?php echo esc_attr( 'supplier_exports[' . $key . '][enabled]' ); ?>"
+												value="1"
+												<?php checked( ! empty( $config['enabled'] ) ); ?>
+											/>
+											<?php esc_html_e( 'Activeer e-mail', 'siti-stock-plugin' ); ?>
+										</label>
+									</td>
+								</tr>
+							<?php endforeach; ?>
+						</tbody>
+					</table>
+
+					<?php submit_button( __( 'Instellingen opslaan', 'siti-stock-plugin' ) ); ?>
+				</form>
+
+				<h2><?php esc_html_e( 'Handmatig versturen', 'siti-stock-plugin' ); ?></h2>
+				<p class="description"><?php esc_html_e( 'Gebruik deze knoppen om direct een export te versturen, ook als de automatische taak uit staat.', 'siti-stock-plugin' ); ?></p>
+
+				<table class="widefat fixed striped">
+					<thead>
+						<tr>
+							<th><?php esc_html_e( 'Leverancier', 'siti-stock-plugin' ); ?></th>
+							<th><?php esc_html_e( 'Geplande tijd', 'siti-stock-plugin' ); ?></th>
+							<th><?php esc_html_e( 'Actie', 'siti-stock-plugin' ); ?></th>
+						</tr>
+					</thead>
+					<tbody>
+						<?php foreach ( $suppliers as $key => $config ) : ?>
+							<tr>
+								<td><?php echo esc_html( isset( $config['supplier'] ) ? $config['supplier'] : $key ); ?></td>
+								<td><?php echo esc_html( isset( $config['time'] ) ? $config['time'] : '00:00' ); ?></td>
+								<td>
+									<form method="post" action="<?php echo esc_url( admin_url( 'admin-post.php' ) ); ?>">
+										<?php wp_nonce_field( 'siti_stock_send_supplier_export' ); ?>
+										<input type="hidden" name="action" value="siti_stock_send_supplier_export" />
+										<input type="hidden" name="supplier_key" value="<?php echo esc_attr( $key ); ?>" />
+										<?php submit_button( __( 'Verstuur nu', 'siti-stock-plugin' ), 'secondary', 'submit', false ); ?>
+									</form>
+								</td>
+							</tr>
+						<?php endforeach; ?>
+					</tbody>
+				</table>
+			<?php endif; ?>
+		</div>
+		<?php
+	}
+
 	/**
 	 * Render a text/password input.
 	 *

includes/class-siti-stock-inventory-manager.php

@@ -14,11 +14,17 @@ class Siti_Stock_Inventory_Manager {
 	 */
 	private $external_stock_key;
 
+	/**
+	 * @var string
+	 */
+	private $order_item_stock_source_key;
+
 	/**
 	 * @param string $meta_key Meta key used to store external stock.
 	 */
 	public function __construct( $meta_key ) {
 		$this->external_stock_key         = $meta_key;
+		$this->order_item_stock_source_key = '_siti_stock_source_breakdown';
 	}
 
 	/**
@@ -34,6 +40,8 @@ class Siti_Stock_Inventory_Manager {
 		add_filter( 'woocommerce_product_get_stock_status', array( $this, 'filter_stock_status_with_external' ), 10, 2 );
 		add_filter( 'woocommerce_product_variation_get_stock_status', array( $this, 'filter_stock_status_with_external' ), 10, 2 );
 		add_action( 'woocommerce_reduce_order_item_stock', array( $this, 'rebalance_stock_after_order_reduction' ), 20, 3 );
+		add_action( 'woocommerce_after_order_itemmeta', array( $this, 'render_order_item_stock_source' ), 10, 3 );
+		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_order_admin_assets' ) );
 	}
 
 	/**
@@ -216,6 +224,71 @@ class Siti_Stock_Inventory_Manager {
 		return max( 0, (int) $base_stock ) + $external_stock;
 	}
 
+	/**
+	 * Determine the quantity reduced for the order item.
+	 *
+	 * @param WC_Order_Item_Product $item   Order line item.
+	 * @param array<string,mixed>   $change Change context from WooCommerce.
+	 * @return int
+	 */
+	private function determine_reduced_quantity( $item, $change ) {
+		if ( ! is_array( $change ) ) {
+			$change = array(
+				'quantity' => $change,
+			);
+		}
+
+		$from = isset( $change['from'] ) ? $change['from'] : null;
+		$to   = isset( $change['to'] ) ? $change['to'] : null;
+
+		if ( null !== $from && null !== $to ) {
+			$qty = $from - $to;
+		} elseif ( isset( $change['quantity'] ) ) {
+			$qty = $change['quantity'];
+		} elseif ( $item instanceof WC_Order_Item_Product ) {
+			$qty = $item->get_quantity();
+		} else {
+			$qty = 0;
+		}
+
+		$qty = function_exists( 'wc_stock_amount' ) ? wc_stock_amount( $qty ) : (int) $qty;
+
+		return max( 0, (int) $qty );
+	}
+
+	/**
+	 * Record the stock source split for an order item.
+	 *
+	 * @param WC_Order_Item_Product $item         Order line item.
+	 * @param WC_Product            $stock_holder Product that holds stock.
+	 * @param int                   $quantity     Total reduced quantity.
+	 */
+	private function record_order_item_stock_source_breakdown( $item, $stock_holder, $quantity ) {
+		$previous_local     = (int) $stock_holder->get_stock_quantity( 'edit' ) + $quantity;
+		$local_available    = max( 0, $previous_local );
+		$external_available = (int) $this->get_external_stock( $stock_holder );
+		$from_local         = min( $quantity, $local_available );
+		$remaining          = max( 0, $quantity - $from_local );
+		$from_external      = min( $remaining, max( 0, $external_available ) );
+
+		$existing = $item->get_meta( $this->order_item_stock_source_key, true );
+		$existing = is_array( $existing )
+			? array(
+				'local'    => isset( $existing['local'] ) ? (int) $existing['local'] : 0,
+				'external' => isset( $existing['external'] ) ? (int) $existing['external'] : 0,
+			)
+			: array(
+				'local'    => 0,
+				'external' => 0,
+			);
+
+		$existing['local']   += $from_local;
+		$existing['external'] += $from_external;
+
+		$item->update_meta_data( $this->order_item_stock_source_key, $existing );
+		$item->save();
+	}
+
 	/**
 	 * Ensure local stock only dips below zero when the external stock is depleted.
 	 *
@@ -224,7 +297,7 @@ class Siti_Stock_Inventory_Manager {
 	 * @param WC_Order              $order  Order instance (unused).
 	 */
 	public function rebalance_stock_after_order_reduction( $item, $change, $order ) {
-		unset( $change, $order );
+		unset( $order );
 
 		if ( ! $item instanceof WC_Order_Item_Product ) {
 			return;
@@ -243,6 +316,12 @@ class Siti_Stock_Inventory_Manager {
 			return;
 		}
 
+		$quantity = $this->determine_reduced_quantity( $item, $change );
+
+		if ( $quantity > 0 ) {
+			$this->record_order_item_stock_source_breakdown( $item, $stock_holder, $quantity );
+		}
+
 		$current_local  = (int) $stock_holder->get_stock_quantity( 'edit' );
 		$external_stock = $this->get_external_stock( $stock_holder );
 
@@ -269,4 +348,91 @@ class Siti_Stock_Inventory_Manager {
 			$stock_holder->save();
 		}
 	}
+
+	/**
+	 * Display the recorded stock source on the admin order screen.
+	 *
+	 * @param int                     $item_id Order item ID.
+	 * @param WC_Order_Item           $item    Order item instance.
+	 * @param WC_Product|false        $product Product (unused).
+	 */
+	public function render_order_item_stock_source( $item_id, $item, $product ) {
+		unset( $item_id, $product );
+
+		if ( ! is_admin() || ! $item instanceof WC_Order_Item_Product ) {
+			return;
+		}
+
+		$data = $item->get_meta( $this->order_item_stock_source_key, true );
+
+		if ( ! is_array( $data ) ) {
+			return;
+		}
+
+		$local    = isset( $data['local'] ) ? max( 0, (int) $data['local'] ) : 0;
+		$external = isset( $data['external'] ) ? max( 0, (int) $data['external'] ) : 0;
+
+		if ( $local <= 0 && $external <= 0 ) {
+			return;
+		}
+
+		echo '<div class="siti-stock-order-item-sources">';
+		echo '<span class="siti-stock-order-item-sources__label">' . esc_html__( 'Voorraadbron', 'siti-stock-plugin' ) . ':</span>';
+
+		if ( $local > 0 ) {
+			$local_label = sprintf(
+				/* translators: %d: quantity fulfilled from regular stock. */
+				_n( '%d uit reguliere voorraad', '%d uit reguliere voorraad', $local, 'siti-stock-plugin' ),
+				$local
+			);
+
+			printf(
+				'<span class="siti-stock-order-item-sources__badge is-local"><span class="dashicons dashicons-archive" aria-hidden="true"></span>%s</span>',
+				esc_html( $local_label )
+			);
+		}
+
+		if ( $external > 0 ) {
+			$external_label = sprintf(
+				/* translators: %d: quantity fulfilled from external stock. */
+				_n( '%d uit externe voorraad', '%d uit externe voorraad', $external, 'siti-stock-plugin' ),
+				$external
+			);
+
+			printf(
+				'<span class="siti-stock-order-item-sources__badge is-external"><span class="dashicons dashicons-cloud" aria-hidden="true"></span>%s</span>',
+				esc_html( $external_label )
+			);
+		}
+
+		echo '</div>';
+	}
+
+	/**
+	 * Enqueue lightweight styling on the order edit screen.
+	 *
+	 * @param string $hook Current admin hook.
+	 */
+	public function enqueue_order_admin_assets( $hook ) {
+		if ( 'post.php' !== $hook && 'post-new.php' !== $hook ) {
+			return;
+		}
+
+		if ( ! function_exists( 'get_current_screen' ) ) {
+			return;
+		}
+
+		$screen = get_current_screen();
+
+		if ( ! $screen || 'shop_order' !== $screen->post_type ) {
+			return;
+		}
+
+		wp_enqueue_style(
+			'siti-stock-order-admin',
+			plugins_url( 'assets/css/order-admin.css', SITI_STOCK_PLUGIN_FILE ),
+			array(),
+			SITI_STOCK_PLUGIN_VERSION
+		);
+	}
 }

includes/class-siti-stock-plugin.php

@@ -10,6 +10,7 @@ require_once __DIR__ . '/class-siti-stock-admin.php';
 require_once __DIR__ . '/class-siti-stock-inventory-manager.php';
 require_once __DIR__ . '/class-siti-stock-sync-service.php';
 require_once __DIR__ . '/class-siti-stock-sync-controller.php';
+require_once __DIR__ . '/class-siti-stock-supplier-exports.php';
 
 /**
  * Core plugin bootstrap that wires together all sub-components.
@@ -50,6 +51,11 @@ class Siti_Stock_Plugin {
 	 */
 	private $sync_controller;
 
+	/**
+	 * @var Siti_Stock_Supplier_Exports
+	 */
+	private $supplier_exports;
+
 	/**
 	 * Get singleton instance.
 	 *
@@ -80,6 +86,10 @@ class Siti_Stock_Plugin {
 
 		$settings_repo = new Siti_Stock_Settings( self::OPTION_KEY );
 		Siti_Stock_Sync_Controller::maybe_schedule_from_settings( self::CRON_HOOK, $settings_repo->get_all() );
+
+		$notices          = new Siti_Stock_Admin_Notices();
+		$supplier_exports = new Siti_Stock_Supplier_Exports( $settings_repo, $notices );
+		$supplier_exports->reschedule_all();
 	}
 
 	/**
@@ -87,18 +97,22 @@ class Siti_Stock_Plugin {
 	 */
 	public static function deactivate() {
 		Siti_Stock_Sync_Controller::clear_schedule( self::CRON_HOOK );
+		Siti_Stock_Supplier_Exports::clear_all_schedules();
 	}
 
 	private function __construct() {
 		$this->settings         = new Siti_Stock_Settings( self::OPTION_KEY );
 		$this->notices          = new Siti_Stock_Admin_Notices();
 		$this->sync_controller  = new Siti_Stock_Sync_Controller( $this->settings, $this->notices, self::CRON_HOOK );
+		$this->supplier_exports = new Siti_Stock_Supplier_Exports( $this->settings, $this->notices );
 		$this->inventory_manager = new Siti_Stock_Inventory_Manager( self::EXTERNAL_STOCK_META_KEY );
-		$this->admin            = new Siti_Stock_Admin( $this->settings, $this->sync_controller, $this->notices );
+		$this->admin            = new Siti_Stock_Admin( $this->settings, $this->sync_controller, $this->notices, $this->supplier_exports );
 
 		$this->admin->register_hooks();
 		$this->inventory_manager->register_hooks();
 		$this->sync_controller->register_hooks();
+		$this->supplier_exports->register_hooks();
+		$this->supplier_exports->maybe_schedule_all();
 		add_filter( 'woocommerce_data_stores', array( $this, 'override_product_data_store' ), 20 );
 	}
 

includes/class-siti-stock-settings.php

@@ -99,6 +99,7 @@ class Siti_Stock_Settings {
 					'default_status'   => 'instock',
 					'enable_auto_sync' => false,
 					'sync_interval'    => 'hourly',
+					'supplier_exports' => array(),
 				)
 			);
 		}

includes/class-siti-stock-supplier-exports.php

@@ -0,0 +1,640 @@
+<?php
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Handles scheduled supplier exports and related admin actions.
+ */
+class Siti_Stock_Supplier_Exports {
+
+	const CRON_HOOK = 'siti_stock_plugin_supplier_export';
+	const SUPPLIER_META_KEY = '_wpci_supplier';
+
+	/**
+	 * @var Siti_Stock_Settings
+	 */
+	private $settings;
+
+	/**
+	 * @var Siti_Stock_Admin_Notices
+	 */
+	private $notices;
+
+	/**
+	 * Cached supplier configs.
+	 *
+	 * @var array<string,array<string,mixed>>|null
+	 */
+	private $supplier_cache = null;
+
+	/**
+	 * @param Siti_Stock_Settings      $settings Settings repository.
+	 * @param Siti_Stock_Admin_Notices $notices Notice handler.
+	 */
+	public function __construct( Siti_Stock_Settings $settings, Siti_Stock_Admin_Notices $notices ) {
+		$this->settings = $settings;
+		$this->notices  = $notices;
+	}
+
+	/**
+	 * Register hooks for cron and admin actions.
+	 */
+	public function register_hooks() {
+		add_action( self::CRON_HOOK, array( $this, 'run_scheduled_export' ), 10, 1 );
+		add_action( 'admin_post_siti_stock_send_supplier_export', array( $this, 'handle_manual_export' ) );
+		add_action( 'admin_post_siti_stock_save_supplier_schedule', array( $this, 'handle_schedule_save' ) );
+		add_action( 'update_option_' . $this->settings->get_option_key(), array( $this, 'handle_settings_update' ), 10, 2 );
+	}
+
+	/**
+	 * Trigger export when cron fires.
+	 *
+	 * @param string $supplier_key Supplier identifier.
+	 */
+	public function run_scheduled_export( $supplier_key ) {
+		$this->send_export( $supplier_key );
+	}
+
+	/**
+	 * Ensure all configured suppliers are scheduled.
+	 */
+	public function maybe_schedule_all() {
+		$configs = $this->get_supplier_configs();
+
+		foreach ( $configs as $key => $config ) {
+			if ( empty( $config['enabled'] ) || empty( $config['time'] ) ) {
+				$this->clear_schedule_for_supplier( $key );
+				continue;
+			}
+
+			if ( ! wp_next_scheduled( self::CRON_HOOK, array( $key ) ) ) {
+				$this->schedule_supplier( $key, $config );
+			}
+		}
+	}
+
+	/**
+	 * Clear and reschedule cron hooks based on current settings.
+	 */
+	public function reschedule_all() {
+		wp_clear_scheduled_hook( self::CRON_HOOK );
+
+		$configs = $this->get_supplier_configs();
+		foreach ( $configs as $key => $config ) {
+			$this->schedule_supplier( $key, $config );
+		}
+	}
+
+	/**
+	 * Remove scheduled events and cache.
+	 */
+	public function reset_cache() {
+		$this->supplier_cache = null;
+	}
+
+	/**
+	 * Clear all cron events for this feature.
+	 */
+	public static function clear_all_schedules() {
+		wp_clear_scheduled_hook( self::CRON_HOOK );
+	}
+
+	/**
+	 * Handle manual export submission.
+	 */
+	public function handle_manual_export() {
+		if ( ! current_user_can( 'manage_options' ) ) {
+			wp_die( esc_html__( 'Onvoldoende rechten.', 'siti-stock-plugin' ) );
+		}
+
+		check_admin_referer( 'siti_stock_send_supplier_export' );
+
+		$supplier_key = isset( $_POST['supplier_key'] ) ? sanitize_text_field( wp_unslash( $_POST['supplier_key'] ) ) : '';
+		$result       = $this->send_export( $supplier_key );
+
+		if ( is_wp_error( $result ) ) {
+			$this->notices->add_notice( $result->get_error_message(), 'error' );
+		} else {
+			$this->notices->add_notice(
+				sprintf(
+					/* translators: %s supplier label */
+					__( 'Export voor %s verzonden.', 'siti-stock-plugin' ),
+					isset( $result['label'] ) ? $result['label'] : $supplier_key
+				),
+				'success'
+			);
+		}
+
+		wp_safe_redirect( wp_get_referer() ? wp_get_referer() : admin_url( 'admin.php?page=siti-stock-plugin-stock-updates' ) );
+		exit;
+	}
+
+	/**
+	 * Handle saving of schedule settings.
+	 */
+	public function handle_schedule_save() {
+		if ( ! current_user_can( 'manage_options' ) ) {
+			wp_die( esc_html__( 'Onvoldoende rechten.', 'siti-stock-plugin' ) );
+		}
+
+		check_admin_referer( 'siti_stock_save_supplier_schedule' );
+
+		$raw_input = isset( $_POST['supplier_exports'] ) ? (array) wp_unslash( $_POST['supplier_exports'] ) : array();
+		$this->persist_supplier_settings( $raw_input );
+		$this->notices->add_notice( __( 'Voorkeuren opgeslagen.', 'siti-stock-plugin' ) );
+
+		wp_safe_redirect( wp_get_referer() ? wp_get_referer() : admin_url( 'admin.php?page=siti-stock-plugin-stock-updates' ) );
+		exit;
+	}
+
+	/**
+	 * React to option updates by refreshing cron.
+	 *
+	 * @param array<string,mixed> $old_value Old settings.
+	 * @param array<string,mixed> $value     New settings.
+	 */
+	public function handle_settings_update( $old_value, $value ) {
+		unset( $old_value ); // Unused.
+		unset( $value );
+
+		$this->reset_cache();
+		$this->reschedule_all();
+	}
+
+	/**
+	 * Retrieve supplier configs for display/scheduling.
+	 *
+	 * @return array<string,array<string,mixed>>
+	 */
+	public function get_supplier_configs() {
+		if ( null !== $this->supplier_cache ) {
+			return $this->supplier_cache;
+		}
+
+		$settings  = $this->settings->get_all();
+		$configured = isset( $settings['supplier_exports'] ) && is_array( $settings['supplier_exports'] )
+			? $settings['supplier_exports']
+			: array();
+
+		$configured = $this->ensure_distinct_meta_suppliers( $configured );
+
+		uasort(
+			$configured,
+			function ( $a, $b ) {
+				return strcmp(
+					strtolower( isset( $a['supplier'] ) ? $a['supplier'] : '' ),
+					strtolower( isset( $b['supplier'] ) ? $b['supplier'] : '' )
+				);
+			}
+		);
+
+		$this->supplier_cache = $configured;
+
+		return $configured;
+	}
+
+	/**
+	 * Retrieve config for specific supplier key.
+	 *
+	 * @param string $supplier_key Supplier key.
+	 * @return array<string,mixed>|null
+	 */
+	public function get_supplier_config( $supplier_key ) {
+		$configs = $this->get_supplier_configs();
+
+		return isset( $configs[ $supplier_key ] ) ? $configs[ $supplier_key ] : null;
+	}
+
+	/**
+	 * Send the mail export for supplier key.
+	 *
+	 * @param string $supplier_key Supplier key.
+	 * @return array<string,mixed>|WP_Error
+	 */
+	public function send_export( $supplier_key ) {
+		$supplier_key = sanitize_title( $supplier_key );
+		$config       = $this->get_supplier_config( $supplier_key );
+
+		if ( empty( $config ) || empty( $config['supplier'] ) ) {
+			return new WP_Error( 'siti_stock_unknown_supplier', __( 'Onbekende leverancier.', 'siti-stock-plugin' ) );
+		}
+
+		if ( ! function_exists( 'wc_get_orders' ) ) {
+			return new WP_Error( 'siti_stock_missing_wc', __( 'WooCommerce is vereist voor de exports.', 'siti-stock-plugin' ) );
+		}
+
+		$data = $this->collect_rows_for_supplier( $config['supplier'] );
+
+		$admin_email = get_option( 'admin_email' );
+		if ( ! $admin_email || ! is_email( $admin_email ) ) {
+			return new WP_Error( 'siti_stock_missing_email', __( 'Admin e-mailadres kon niet worden opgehaald.', 'siti-stock-plugin' ) );
+		}
+
+		$csv     = $this->render_csv( $data['rows'] );
+		$subject = sprintf(
+			/* translators: %s supplier name */
+			__( 'Bestellingen %s (24 uur)', 'siti-stock-plugin' ),
+			$config['supplier']
+		);
+
+		$body_lines   = array();
+		$body_lines[] = sprintf(
+			/* translators: %s supplier name */
+			__( 'Overzicht voor leverancier %s.', 'siti-stock-plugin' ),
+			$config['supplier']
+		);
+		$body_lines[] = sprintf(
+			/* translators: %d total items */
+			__( 'Totaal aantal regels: %d.', 'siti-stock-plugin' ),
+			count( $data['rows'] )
+		);
+		if ( empty( $data['rows'] ) ) {
+			$body_lines[] = __( 'Er zijn geen bestellingen gevonden in de afgelopen 24 uur.', 'siti-stock-plugin' );
+		}
+		$body_lines[] = '';
+		$body_lines[] = $csv;
+
+		$headers = array( 'Content-Type: text/plain; charset=UTF-8' );
+		$sent    = wp_mail( $admin_email, $subject, implode( "\r\n", $body_lines ), $headers );
+
+		if ( ! $sent ) {
+			return new WP_Error( 'siti_stock_mail_failed', __( 'E-mail verzenden is mislukt.', 'siti-stock-plugin' ) );
+		}
+
+		return array(
+			'label' => $config['supplier'],
+			'rows'  => count( $data['rows'] ),
+		);
+	}
+
+	/**
+	 * Persist sanitized supplier settings.
+	 *
+	 * @param array<string,mixed> $input Input from form.
+	 */
+	private function persist_supplier_settings( array $input ) {
+		$current   = $this->get_supplier_configs();
+		$sanitized = array();
+
+		foreach ( $current as $key => $config ) {
+			$row      = isset( $input[ $key ] ) ? (array) $input[ $key ] : array();
+			$time_raw = isset( $row['time'] ) ? sanitize_text_field( $row['time'] ) : ( isset( $config['time'] ) ? $config['time'] : '' );
+			$time     = $this->normalize_time( $time_raw );
+
+			$sanitized[ $key ] = array(
+				'supplier' => isset( $config['supplier'] ) ? $config['supplier'] : '',
+				'time'     => $time,
+				'enabled'  => ! empty( $row['enabled'] ),
+			);
+		}
+
+		$settings                       = $this->settings->get_all();
+		$settings['supplier_exports']    = $sanitized;
+		$this->settings->reset_cache();
+		update_option( $this->settings->get_option_key(), $settings );
+		$this->reset_cache();
+	}
+
+	/**
+	 * Collect CSV rows for supplier meta value.
+	 *
+	 * @param string $supplier Supplier label.
+	 * @return array<string,mixed>
+	 */
+	private function collect_rows_for_supplier( $supplier ) {
+		$key = $this->normalize_supplier_key( $supplier );
+
+		$site_timezone = function_exists( 'wp_timezone' ) ? wp_timezone() : new DateTimeZone( wp_timezone_string() );
+		$after_date    = new DateTimeImmutable( 'now', $site_timezone );
+		$after_date    = $after_date->sub( new DateInterval( 'P1D' ) );
+		$after_utc     = $after_date->setTimezone( new DateTimeZone( 'UTC' ) );
+
+		$date_query = array(
+			array(
+				'column'    => 'date_created_gmt',
+				'after'     => $after_utc->format( 'Y-m-d H:i:s' ),
+				'inclusive' => true,
+			),
+		);
+
+		$query = new WC_Order_Query(
+			array(
+				'status'       => array( 'pending', 'processing', 'on-hold', 'completed' ),
+				'limit'        => -1,
+				'type'         => 'shop_order',
+				'return'       => 'objects',
+				'date_query'   => $date_query,
+			)
+		);
+
+		$orders  = $query->get_orders();
+		$results = array();
+
+		foreach ( $orders as $order ) {
+			foreach ( $order->get_items( 'line_item' ) as $item ) {
+				$product = $item->get_product();
+
+				if ( ! $product ) {
+					continue;
+				}
+
+				$item_supplier = $this->get_product_supplier( $product );
+
+				if ( '' === $item_supplier || $this->normalize_supplier_key( $item_supplier ) !== $key ) {
+					continue;
+				}
+
+				$sku = $this->get_product_sku( $product );
+
+				if ( '' === $sku ) {
+					$sku = sprintf( 'product-%d', $product->get_id() );
+				}
+
+				$index = strtolower( $sku );
+
+				if ( ! isset( $results[ $index ] ) ) {
+					$results[ $index ] = array(
+						'sku'      => $sku,
+						'quantity' => 0,
+					);
+				}
+
+				$results[ $index ]['quantity'] += (int) $item->get_quantity();
+			}
+		}
+
+		return array(
+			'rows' => array_values( $results ),
+		);
+	}
+
+	/**
+	 * Retrieve supplier meta for product (falls back to parent).
+	 *
+	 * @param WC_Product $product Product.
+	 * @return string
+	 */
+	private function get_product_supplier( $product ) {
+		$product_id = $product->get_id();
+		$value      = get_post_meta( $product_id, self::SUPPLIER_META_KEY, true );
+
+		if ( '' !== $value ) {
+			return trim( (string) $value );
+		}
+
+		$parent_id = $product->get_parent_id();
+
+		if ( $parent_id ) {
+			$parent_value = get_post_meta( $parent_id, self::SUPPLIER_META_KEY, true );
+
+			if ( '' !== $parent_value ) {
+				return trim( (string) $parent_value );
+			}
+		}
+
+		return '';
+	}
+
+	/**
+	 * Retrieve SKU, falling back to parent product SKU.
+	 *
+	 * @param WC_Product $product Product.
+	 * @return string
+	 */
+	private function get_product_sku( $product ) {
+		$sku = $product->get_sku();
+
+		if ( '' !== $sku ) {
+			return $sku;
+		}
+
+		$parent_id = $product->get_parent_id();
+
+		if ( $parent_id ) {
+			$parent = wc_get_product( $parent_id );
+
+			if ( $parent && '' !== $parent->get_sku() ) {
+				return $parent->get_sku();
+			}
+		}
+
+		return '';
+	}
+
+	/**
+	 * Convert an array of SKU rows to CSV text separated with semicolons.
+	 *
+	 * @param array<int,array<string,int|string>> $rows Rows.
+	 * @return string
+	 */
+	private function render_csv( array $rows ) {
+		$lines   = array( 'sku;aantal' );
+
+		foreach ( $rows as $row ) {
+			$sku      = isset( $row['sku'] ) ? $row['sku'] : '';
+			$quantity = isset( $row['quantity'] ) ? (int) $row['quantity'] : 0;
+			$lines[]  = sprintf( '%s;%d', $sku, $quantity );
+		}
+
+		return implode( "\r\n", $lines );
+	}
+
+	/**
+	 * Schedule supplier if enabled.
+	 *
+	 * @param string                       $supplier_key Key.
+	 * @param array<string,mixed>|null     $config Config.
+	 */
+	private function schedule_supplier( $supplier_key, $config ) {
+		if ( empty( $config ) || empty( $config['enabled'] ) || empty( $config['time'] ) ) {
+			return;
+		}
+
+		$timestamp = $this->calculate_next_timestamp( $config['time'] );
+		wp_schedule_event( $timestamp, 'daily', self::CRON_HOOK, array( $supplier_key ) );
+	}
+
+	/**
+	 * Remove scheduled event for supplier.
+	 *
+	 * @param string $supplier_key Key.
+	 */
+	private function clear_schedule_for_supplier( $supplier_key ) {
+		$timestamp = wp_next_scheduled( self::CRON_HOOK, array( $supplier_key ) );
+
+		while ( $timestamp ) {
+			wp_unschedule_event( $timestamp, self::CRON_HOOK, array( $supplier_key ) );
+			$timestamp = wp_next_scheduled( self::CRON_HOOK, array( $supplier_key ) );
+		}
+	}
+
+	/**
+	 * Add entries for suppliers found in product meta.
+	 *
+	 * @param array<string,mixed> $configured Configured values.
+	 * @return array<string,mixed>
+	 */
+	private function ensure_distinct_meta_suppliers( array $configured ) {
+		$result = array();
+
+		foreach ( $this->get_distinct_suppliers() as $supplier ) {
+			$key       = $this->normalize_supplier_key( $supplier );
+			$existing  = isset( $configured[ $key ] ) ? $configured[ $key ] : array();
+			$result[ $key ] = array(
+				'supplier' => $supplier,
+				'time'     => $this->normalize_time(
+					isset( $existing['time'] ) ? $existing['time'] : $this->get_default_time_for_key( $key )
+				),
+				'enabled'  => isset( $existing['enabled'] ) ? (bool) $existing['enabled'] : $this->is_default_enabled( $key ),
+			);
+		}
+
+		return $result;
+	}
+
+	/**
+	 * Retrieve suppliers from product meta.
+	 *
+	 * @return array<int,string>
+	 */
+	private function get_distinct_suppliers() {
+		global $wpdb;
+
+		$meta_table = $wpdb->postmeta;
+		$post_table = $wpdb->posts;
+		$sql        = "
+			SELECT DISTINCT pm.meta_value
+			FROM {$meta_table} pm
+			INNER JOIN {$post_table} p ON p.ID = pm.post_id
+			WHERE pm.meta_key = %s
+				AND pm.meta_value <> ''
+				AND p.post_type IN ('product','product_variation')
+				AND p.post_status NOT IN ('trash','auto-draft')
+		";
+
+		$results = $wpdb->get_col( $wpdb->prepare( $sql, self::SUPPLIER_META_KEY ) ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+
+		if ( empty( $results ) ) {
+			return array();
+		}
+
+		return array_map(
+			function ( $value ) {
+				return trim( (string) $value );
+			},
+			$results
+		);
+	}
+
+	/**
+	 * Normalize supplier key to slug.
+	 *
+	 * @param string $value Value.
+	 * @return string
+	 */
+	private function normalize_supplier_key( $value ) {
+		return sanitize_title( (string) $value );
+	}
+
+	/**
+	 * Normalize HH:MM strings, fallback to midnight.
+	 *
+	 * @param string $time Time string.
+	 * @return string
+	 */
+	private function normalize_time( $time ) {
+		$time = trim( (string) $time );
+		if ( ! preg_match( '/^\d{1,2}:\d{2}$/', $time ) ) {
+			return '00:00';
+		}
+
+		list( $hour, $minute ) = array_map( 'intval', explode( ':', $time, 2 ) );
+
+		$hour   = max( 0, min( 23, $hour ) );
+		$minute = max( 0, min( 59, $minute ) );
+
+		return sprintf( '%02d:%02d', $hour, $minute );
+	}
+
+	/**
+	 * Calculate the next timestamp for a given HH:MM.
+	 *
+	 * @param string $time Time in HH:MM.
+	 * @return int
+	 */
+	private function calculate_next_timestamp( $time ) {
+		$time = $this->normalize_time( $time );
+		list( $hour, $minute ) = array_map( 'intval', explode( ':', $time ) );
+
+		$timezone = wp_timezone();
+		$now      = new DateTimeImmutable( 'now', $timezone );
+		$target   = $now->setTime( $hour, $minute );
+
+		if ( $target <= $now ) {
+			$target = $target->modify( '+1 day' );
+		}
+
+		return $target->getTimestamp();
+	}
+
+	/**
+	 * Default suppliers (label + default time/settings).
+	 *
+	 * @return array<string,array<string,mixed>>
+	 */
+	private function get_default_suppliers() {
+		return array(
+			'orion'       => array(
+				'label'   => 'Orion',
+				'time'    => '09:00',
+				'enabled' => true,
+			),
+			'shots'       => array(
+				'label'   => 'Shots',
+				'time'    => '10:00',
+				'enabled' => true,
+			),
+			'stots'       => array(
+				'label'   => 'Stots',
+				'time'    => '10:00',
+				'enabled' => true,
+			),
+			'leg-avenue'  => array(
+				'label'   => 'Leg Avenue',
+				'time'    => '14:00',
+				'enabled' => true,
+			),
+			'oproducts'   => array(
+				'label'   => 'Oproducts',
+				'time'    => '13:00',
+				'enabled' => true,
+			),
+		);
+	}
+
+	/**
+	 * Retrieve default time for supplier key.
+	 *
+	 * @param string $key Supplier key.
+	 * @return string
+	 */
+	private function get_default_time_for_key( $key ) {
+		$defaults = $this->get_default_suppliers();
+
+		return isset( $defaults[ $key ] ) ? $defaults[ $key ]['time'] : '09:00';
+	}
+
+	/**
+	 * Determine default enabled state for supplier key.
+	 *
+	 * @param string $key Supplier key.
+	 * @return bool
+	 */
+	private function is_default_enabled( $key ) {
+		$defaults = $this->get_default_suppliers();
+
+		return isset( $defaults[ $key ] ) ? (bool) $defaults[ $key ]['enabled'] : false;
+	}
+}

siti-stock-plugin.php

@@ -3,7 +3,7 @@
  * Plugin Name:       Siti Stock Plugin
  * Plugin URI:        https://github.com/SitiWeb/siti-stock-plugin
  * Description:       Synchroniseert WooCommerce voorraad met het externe Siti voorraadplatform.
- * Version:           1.0.0
+ * Version:           1.2.6
  * Author:            Siti Web
  * Author URI:        https://www.siti.nl
  * Requires PHP:      8.1
@@ -16,12 +16,15 @@ if ( ! defined( 'ABSPATH' ) ) {
 	exit;
 }
 
-define( 'SITI_STOCK_PLUGIN_VERSION', '0.1.0' );
+define( 'SITI_STOCK_PLUGIN_VERSION', '1.2.6' );
 define( 'SITI_STOCK_PLUGIN_FILE', __FILE__ );
 define( 'SITI_STOCK_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
 
 require_once __DIR__ . '/includes/class-siti-stock-plugin.php';
+
+if ( ! class_exists( 'SitiWebUpdater' ) ) {
 	require_once __DIR__ . '/SitiWebUpdater.php';
+}
 
 register_activation_hook( __FILE__, array( 'Siti_Stock_Plugin', 'activate' ) );
 register_deactivation_hook( __FILE__, array( 'Siti_Stock_Plugin', 'deactivate' ) );