class.arJoinCollection.php

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<?php
 
class arJoinCollection extends arStatementCollection
{
    protected array $table_names = [];
 
    public function getSaveTableName(arStatement $arStatement): string
    {
        $tableName = $arStatement->getTableName();
        if (in_array($tableName, $this->table_names, true)) {
            $vals = array_count_values($this->table_names);
            $next = $vals[$tableName] + 1;
            $arStatement->setFullNames(true);
            $arStatement->setIsMapped(true);
 
            return $tableName . '_' . $next;
        }
        return $tableName;
    }
 
    public function add(arStatement $arStatement): void
    {
        $arStatement->setTableNameAs($this->getSaveTableName($arStatement));
        $this->table_names[] = $arStatement->getTableName();
        parent::add($arStatement);
    }
 
    public function asSQLStatement(ilDBInterface $db): string
    {
        $return = '';
        if ($this->hasStatements()) {
            foreach ($this->getJoins() as $arJoin) {
                $return .= $arJoin->asSQLStatement($this->getAr(), $db);
            }
        }
 
        return $return;
    }
 
    public function getJoins(): array
    {
        return $this->statements;
    }
}