gcgs-custom-where-clause.php: Added new snippet for custom where clause.

gc-google-sheets/gcgs-custom-where-clause.php

@@ -0,0 +1,24 @@
+<?php
+/**
+ * Gravity Connect // Google Sheets // Custom Where Clause
+ *
+ * This snippet customizes the generation of `where` clauses for Google Sheets queries.
+ *
+ * Installation:
+ *   1. Install per https://gravitywiz.com/documentation/how-do-i-install-a-snippet/
+ */
+add_filter( 'gcgs_gppa_build_gviz_where_clause', function( $clause, $clauses, $value, $column_letter, $operator, $args ) {
+	$conditions = array();
+
+	// Loop over the $value array and create conditions.
+	foreach ( $value as $v ) {
+		if ( ! empty( $v ) ) {
+			$conditions[] = sprintf( "lower(%s) = '%s'", $column_letter, strtolower( $v ) );
+		}
+	}
+
+	// Implode the conditions array with ' OR ' to form the $clause.
+	$clause = implode( ' OR ', $conditions );
+
+	return $clause;
+}, 10, 6 );