Joint.php

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<?php
/*
 You may not change or alter any portion of this comment or credits
 of supporting developers from this source code or any supporting source code
 which is considered copyrighted (c) material of the original comment or credit authors.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/

namespace Xoops\Core\Kernel\Model;

use Xoops\Core\Kernel\CriteriaElement;
use Xoops\Core\Kernel\XoopsModelAbstract;

class Joint extends XoopsModelAbstract
{
    private function validateLinks()
    {
        if (empty($this->handler->table_link) || empty($this->handler->field_link)) {
            trigger_error("The linked table is not set yet.", E_USER_WARNING);
            return false;
        }
        if (empty($this->handler->field_object)) {
            $this->handler->field_object = $this->handler->field_link;
        }
        return true;
    }

    public function getByLink(
        CriteriaElement $criteria = null,
        $fields = null,
        $asObject = true,
        $field_link = null,
        $field_object = null
    ) {
        if (!empty($field_link)) {
            $this->handler->field_link = $field_link;
        }
        if (!empty($field_object)) {
            $this->handler->field_object = $field_object;
        }
        if (!$this->validateLinks()) {
            return false;
        }

        $qb = $this->handler->db2->createXoopsQueryBuilder();
        if (is_array($fields) && count($fields)) {
            if (!in_array("o." . $this->handler->keyName, $fields)) {
                $fields[] = "o." . $this->handler->keyName;
            }
            $first = true;
            foreach ($fields as $field) {
                if ($first) {
                    $first = false;
                    $qb->select($field);
                } else {
                    $qb->addSelect($field);
                }
            }
        } else {
            $qb ->select('o.*')
                ->addSelect('l.*');
        }
        $qb ->from($this->handler->table, 'o')
            ->leftJoin(
                'o',
                $this->handler->table_link,
                'l',
                "o.{$this->handler->field_object} = l.{$this->handler->field_link}"
            );
        if (isset($criteria) && ($criteria instanceof CriteriaElement)) {
            $qb = $criteria->renderQb($qb);
        }
        $result = $qb->execute();
        $ret = array();
        if ($asObject) {
            while ($myrow = $result->fetch(\PDO::FETCH_ASSOC)) {
                $object = $this->handler->create(false);
                $object->assignVars($myrow);
                $ret[$myrow[$this->handler->keyName]] = $object;
                unset($object);
            }
        } else {
            $object = $this->handler->create(false);
            while ($myrow = $result->fetch(\PDO::FETCH_ASSOC)) {
                $object->assignVars($myrow);
                $ret[$myrow[$this->handler->keyName]] = $object->getValues();
            }
            unset($object);
        }
        return $ret;
    }

    public function getCountByLink(CriteriaElement $criteria = null)
    {
        if (!$this->validateLinks()) {
            return false;
        }

        $qb = $this->handler->db2->createXoopsQueryBuilder();

        $qb ->select("COUNT(DISTINCT o.{$this->handler->keyName})")
            ->from($this->handler->table, 'o')
            ->leftJoin(
                'o',
                $this->handler->table_link,
                'l',
                "o.{$this->handler->field_object} = l.{$this->handler->field_link}"
            );

        if (isset($criteria) && ($criteria instanceof CriteriaElement)) {
            $criteria->renderQb($qb);
        }

        $result = $qb->execute();
        return $result->fetchColumn(0);

    }

    public function getCountsByLink(CriteriaElement $criteria = null)
    {
        if (!$this->validateLinks()) {
            return false;
        }
                
        $qb = $this->handler->db2->createXoopsQueryBuilder();

        $qb ->select("l.{$this->handler->keyName_link}")
            ->addSelect('COUNT(*)')
            ->from($this->handler->table, 'o')
            ->leftJoin(
                'o',
                $this->handler->table_link,
                'l',
                "o.{$this->handler->field_object} = l.{$this->handler->field_link}"
            );

        if (isset($criteria) && ($criteria instanceof CriteriaElement)) {
            $criteria->renderQb($qb);
        }

        $qb ->groupBy("l.{$this->handler->keyName_link}");

        $result = $qb->execute();

        $ret = array();
        while (list ($id, $count) = $result->fetch(\PDO::FETCH_NUM)) {
            $ret[$id] = $count;
        }
        return $ret;
    }

    public function updateByLink(array $data, CriteriaElement $criteria = null)
    {
        if (!$this->validateLinks()) {
            return false;
        }
                if (empty($data) OR empty($criteria)) { // avoid update all records
                        return false;
                }
                
        $set = array();
        foreach ($data as $key => $val) {
            $set[] = "o.{$key}=" . $this->handler->db2->quote($val);
        }
        $sql = " UPDATE {$this->handler->table} AS o" . " SET " . implode(", ", $set)
            . " LEFT JOIN {$this->handler->table_link} AS l "
            . "ON o.{$this->handler->field_object} = l.{$this->handler->field_link}";
        if (isset($criteria) && ($criteria instanceof CriteriaElement)) {
            $sql .= " " . $criteria->renderWhere();
        }

        return $this->handler->db2->executeUpdate($sql);
    }

    public function deleteByLink(CriteriaElement $criteria = null)
    {
        if (!$this->validateLinks()) {
            return false;
        }
                if (empty($criteria)) { //avoid delete all records
                        return false;
                }
                
        $sql = "DELETE FROM {$this->handler->table} AS o "
            . "LEFT JOIN {$this->handler->table_link} AS l "
            . "ON o.{$this->handler->field_object} = l.{$this->handler->field_link}";
        if (isset($criteria) && ($criteria instanceof CriteriaElement)) {
            $sql .= " " . $criteria->renderWhere();
        }

        return $this->handler->db2->executeUpdate($sql);
    }
}