DatabaseRepository.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\MetaData\OERHarvester\ResourceStatus;
 
class DatabaseRepository implements RepositoryInterface
{
    protected \ilDBInterface $db;
 
    public function __construct(\ilDBInterface $db)
    {
        $this->db = $db;
    }
 
    public function isHarvestingBlocked(int $obj_id): bool
    {
        $res = $this->query(
            'SELECT blocked FROM il_meta_oer_stat WHERE obj_id = ' . $this->quoteInteger($obj_id)
        );
 
        foreach ($res as $row) {
            return (bool) $row['blocked'];
        }
        return false;
    }
 
    public function setHarvestingBlocked(int $obj_id, bool $blocked): void
    {
        $this->manipulate(
            'INSERT INTO il_meta_oer_stat (obj_id, href_id, blocked) VALUES (' .
            $this->quoteInteger($obj_id) . ', ' .
            $this->quoteInteger(0) . ', ' .
            $this->quoteInteger((int) $blocked) . ') ' .
            'ON DUPLICATE KEY UPDATE blocked = ' . $this->quoteInteger((int) $blocked)
        );
    }
 
    public function isAlreadyHarvested(int $obj_id): bool
    {
        $res = $this->query(
            'SELECT href_id FROM il_meta_oer_stat WHERE obj_id = ' . $this->quoteInteger($obj_id)
        );
 
        foreach ($res as $row) {
            return (bool) $row['href_id'];
        }
        return false;
    }
 
    public function getAllHarvestedObjIDs(): \Generator
    {
        $res = $this->query(
            'SELECT obj_id FROM il_meta_oer_stat WHERE href_id > 0'
        );
 
        foreach ($res as $row) {
            yield (int) $row['obj_id'];
        }
    }
 
    public function getHarvestRefID(int $obj_id): int
    {
        $res = $this->query(
            'SELECT href_id FROM il_meta_oer_stat WHERE obj_id = ' . $this->quoteInteger($obj_id)
        );
 
        foreach ($res as $row) {
            return (int) $row['href_id'];
        }
        return 0;
    }
 
    public function setHarvestRefID(int $obj_id, int $harvested_ref_id): void
    {
        $this->manipulate(
            'INSERT INTO il_meta_oer_stat (obj_id, href_id, blocked) VALUES (' .
            $this->quoteInteger($obj_id) . ', ' .
            $this->quoteInteger($harvested_ref_id) . ', ' .
            $this->quoteInteger(0) . ') ' .
            'ON DUPLICATE KEY UPDATE href_id = ' . $this->quoteInteger($harvested_ref_id)
        );
    }
 
    public function deleteHarvestRefID(int $obj_id): void
    {
        $this->manipulate(
            'UPDATE il_meta_oer_stat SET href_id = 0 WHERE obj_id = ' . $this->quoteInteger($obj_id)
        );
    }
 
    public function filterOutBlockedObjects(int ...$obj_ids): \Generator
    {
        $res = $this->query(
            'SELECT obj_id FROM il_meta_oer_stat WHERE blocked = 1 AND ' .
            $this->inWithIntegers('obj_id', ...$obj_ids)
        );
 
        $blocked_ids = [];
        foreach ($res as $row) {
            $blocked_ids[] = (int) $row['obj_id'];
        }
 
        foreach ($obj_ids as $obj_id) {
            if (!in_array($obj_id, $blocked_ids)) {
                yield $obj_id;
            }
        }
    }
 
    public function deleteStatus(int $obj_id): void
    {
        $this->manipulate(
            'DELETE FROM il_meta_oer_stat WHERE obj_id = ' . $this->quoteInteger($obj_id)
        );
    }
 
    protected function query(string $query): \Generator
    {
        $res = $this->db->query($query);
        while ($row = $res->fetchAssoc()) {
            yield $row;
        }
    }
 
    protected function manipulate(string $query): void
    {
        $this->db->manipulate($query);
    }
 
    protected function quoteInteger(int $integer): string
    {
        return $this->db->quote($integer, \ilDBConstants::T_INTEGER);
    }
 
    protected function inWithIntegers(string $field, int ...$integers): string
    {
        return $this->db->in($field, $integers, false, \ilDBConstants::T_INTEGER);
    }
}