gpi-enable-wpml-for-custom-messages.php: Added snippet to use WPML String Translate for custom GPI messages.

gp-inventory/gpi-enable-wpml-for-custom-messages.php

@@ -0,0 +1,38 @@
+<?php
+/**
+ * Gravity Perks // Limit Submissions // Enable `WPML String Translate` for Custom Insufficient,
+ * Exhausted and Available Inventory Messages.
+ * https://gravitywiz.com/documentation/gravity-forms-inventory/
+ */
+add_filter( 'gform_pre_render', function( $form ) {
+	if ( ! function_exists( 'icl_register_string' ) || ! function_exists( 'gp_inventory' ) ) {
+		return $form;
+	}
+
+	$form_id = $form['id'];
+	foreach ( $form['fields'] as $field ) {
+		if ( rgar( $field, 'gpiMessageInventoryInsufficient', false ) ) {
+			$name = "inventory-insufficient-message-{$form_id}-{$field->id}";
+			icl_register_string( 'gp-inventory', $name, $field['gpiMessageInventoryInsufficient'] );
+			add_filter( "gpi_inventory_insufficient_message_{$form_id}_{$field->id}", function( $message ) use ( $name ) {
+				return  apply_filters( 'wpml_translate_single_string', $message, 'gp-inventory', $name );
+			} );
+		}
+		if ( rgar( $field, 'gpiMessageInventoryExhausted', false ) ) {
+			$name = "inventory-exhausted-message-{$form_id}-{$field->id}";
+			icl_register_string( 'gp-inventory', $name, $field['gpiMessageInventoryExhausted'] );
+			add_filter( "gpi_inventory_exhausted_message_{$form_id}_{$field->id}", function( $message ) use ( $name ) {
+				return  apply_filters( 'wpml_translate_single_string', $message, 'gp-inventory', $name );
+			} );
+		}
+		if ( rgar( $field, 'gpiMessageInventoryAvailable', false ) ) {
+			$name = "inventory-available-message-{$form_id}-{$field->id}";
+			icl_register_string( 'gp-inventory', $name, $field['gpiMessageInventoryAvailable'] );
+			add_filter( "gpi_inventory_available_message_{$form_id}_{$field->id}", function( $message ) use ( $name ) {
+				return  apply_filters( 'wpml_translate_single_string', $message, 'gp-inventory', $name );
+			} );
+		}
+	}
+
+	return $form;
+} );