SQL expression rewrite, Pagination, some frontend stuff

Core/Driver/SQL/Expression/JsonArrayAgg.class.php

@@ -2,17 +2,29 @@
 
 namespace Core\Driver\SQL\Expression;
 
+use Core\Driver\SQL\Column\Column;
+use Core\Driver\SQL\MySQL;
+use Core\Driver\SQL\PostgreSQL;
+use Core\Driver\SQL\SQL;
+use Exception;
+
 class JsonArrayAgg extends Expression {
 
-  private $value;
-  private string $alias;
+  private mixed $value;
 
-  public function __construct($value, string $alias) {
+  public function __construct(mixed $value) {
     $this->value = $value;
-    $this->alias = $alias;
   }
 
-  public function getValue() { return $this->value; }
-  public function getAlias(): string { return $this->alias; }
-
+  public function getExpression(SQL $sql, array &$params): string {
+    $value = is_string($this->value) ? new Column($this->value) : $this->value;
+    $value = $sql->addValue($value, $params);
+    if ($sql instanceof MySQL) {
+      return "JSON_ARRAYAGG($value)";
+    } else if ($sql instanceof PostgreSQL) {
+      return "JSON_AGG($value)";
+    } else {
+      throw new Exception("JsonArrayAgg not implemented for driver type: " . get_class($sql));
+    }
+  }
 }