SQL expression rewrite, Pagination, some frontend stuff

Core/Driver/SQL/Condition/CondIn.class.php

@@ -2,6 +2,9 @@
 
 namespace Core\Driver\SQL\Condition;
 
+use Core\Driver\SQL\Query\Select;
+use Core\Driver\SQL\SQL;
+
 class CondIn extends Condition {
 
   private $needle;
@@ -14,4 +17,25 @@ class CondIn extends Condition {
 
   public function getNeedle() { return $this->needle; }
   public function getHaystack() { return $this->haystack; }
+
+  function getExpression(SQL $sql, array &$params): string {
+
+    $haystack = $this->getHaystack();
+    if (is_array($haystack)) {
+      $values = array();
+      foreach ($haystack as $value) {
+        $values[] = $sql->addValue($value, $params);
+      }
+
+      $values = implode(",", $values);
+      $values = "($values)";
+    } else if($haystack instanceof Select) {
+      $values = $haystack->build($params);
+    } else {
+      $sql->getLogger()->error("Unsupported in-expression value: " . get_class($haystack));
+      return false;
+    }
+
+    return $sql->addValue($this->needle, $params) . " IN $values";
+  }
 }