gpi-exhausted-inventory-threshold.php: Added new snippet.

Author: spivurno

gp-inventory/gpi-exhausted-inventory-threshold.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ * Gravity Perks // Inventory // Exhausted Inventory Threshold
+ * https://gravitywiz.com/documentation/gravity-forms-inventory/
+ *
+ * Mark field as out of stock when a given number of choices with exhausted inventory is reached.
+ * For example, if you had 5 choices and wanted to disable the field after 3 choices' inventory
+ * was exhausted, this snippet would do the trick.
+ *
+ * Instructions
+ *
+ * 1. Install per https://gravitywiz.com/documentation/how-do-i-install-a-snippet/
+ * 2. Follow the inline instructions to configure the snippet for your form.
+ */
+// Update "123" to your form ID and "4" to your Inventory-enabled field ID.
+add_filter( 'gpi_is_in_stock_123_4', function( $is_in_stock, $field, $stock ) {
+	$disabled_count = 0;
+	foreach ( $field->choices as $choice ) {
+		if ( rgar( $choice, 'isDisabled' ) ) {
+			$disabled_count++;
+		}
+	}
+	// Update "3" to the number of choices with exhausted inventory required to mark the field as out of stock.
+	if ( $disabled_count >= 3 ) {
+		$is_in_stock = false;
+	}
+	return $is_in_stock;
+}, 10, 3 );