pics/models/AssetIterator.php

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<?php
/*****************************************************************************
* AssetIterator.php
* Contains key class AssetIterator.
*
* Kabuki CMS (C) 2013-2015, Aaron van Geffen
*****************************************************************************/
class AssetIterator extends Asset
{
private Database $db;
private $direction;
private $return_format;
private $res_assets;
private $res_meta;
private $res_thumbs;
protected function __construct($res_assets, $res_meta, $res_thumbs, $return_format, $direction)
{
$this->db = Registry::get('db');
$this->direction = $direction;
$this->res_assets = $res_assets;
$this->res_meta = $res_meta;
$this->res_thumbs = $res_thumbs;
$this->return_format = $return_format;
}
public function next()
{
$row = $this->db->fetch_assoc($this->res_assets);
// No more rows?
if (!$row)
return false;
// Looks up metadata.
$row['meta'] = [];
while ($meta = $this->db->fetch_assoc($this->res_meta))
{
if ($meta['id_asset'] != $row['id_asset'])
continue;
$row['meta'][$meta['variable']] = $meta['value'];
}
// Reset internal pointer for next asset.
$this->db->data_seek($this->res_meta, 0);
// Looks up thumbnails.
$row['thumbnails'] = [];
while ($thumbs = $this->db->fetch_assoc($this->res_thumbs))
{
if ($thumbs['id_asset'] != $row['id_asset'])
continue;
$row['thumbnails'][$thumbs['selector']] = $thumbs['filename'];
}
// Reset internal pointer for next asset.
$this->db->data_seek($this->res_thumbs, 0);
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if ($this->return_format === 'object')
return new Asset($row);
else
return $row;
}
public function reset()
{
$this->db->data_seek($this->res_assets, 0);
$this->db->data_seek($this->res_meta, 0);
$this->db->data_seek($this->res_thumbs, 0);
}
public function clean()
{
if (!$this->res_assets)
return;
$this->db->free_result($this->res_assets);
$this->res_assets = null;
}
public function num()
{
return $this->db->num_rows($this->res_assets);
}
public static function all()
{
return self::getByOptions();
}
public static function getByOptions(array $options = [], $return_count = false, $return_format = 'object')
{
$params = [
'limit' => isset($options['limit']) ? $options['limit'] : 0,
'order' => isset($options['order']) && in_array($options['order'], ['id_asset', 'subdir', 'filename', 'title',
'mime_type', 'image_width', 'image_height', 'date_captured']) ? $options['order'] : 'id_asset',
'direction' => isset($options['direction']) ? $options['direction'] : 'asc',
];
if (isset($options['offset']))
$params['offset'] = $options['offset'];
elseif (isset($options['page']) && $options['page'] >= 1)
$params['offset'] = $params['limit'] * ($options['page'] - 1);
else
$params['offset'] = 0;
$where = [];
if (isset($options['mime_type']))
{
$params['mime_type'] = $options['mime_type'];
if (is_array($options['mime_type']))
$where[] = 'a.mimetype IN({array_string:mime_type})';
else
$where[] = 'a.mimetype = {string:mime_type}';
}
if (isset($options['id_user_uploaded']))
{
$params['id_user_uploaded'] = $options['id_user_uploaded'];
$where[] = 'id_user_uploaded = {int:id_user_uploaded}';
}
if (isset($options['id_tag']))
{
$params['id_tag'] = $options['id_tag'];
$where[] = 'id_asset IN(
SELECT l.id_asset
FROM assets_tags AS l
WHERE l.id_tag = {int:id_tag})';
}
// Make it valid SQL.
$order = 'a.' . $params['order'] . ' ' . ($params['direction'] == 'desc' ? 'DESC' : 'ASC');
$where = empty($where) ? '1' : implode(' AND ', $where);
// And ... go!
$db = Registry::get('db');
// Get a resource object for the assets.
$res_assets = $db->query('
SELECT a.*
FROM assets AS a
WHERE ' . $where . '
ORDER BY ' . $order . (!empty($params['limit']) ? '
LIMIT {int:offset}, {int:limit}' : ''),
$params);
// Get a resource object for the asset meta.
$res_meta = $db->query('
SELECT id_asset, variable, value
FROM assets_meta
WHERE id_asset IN(
SELECT id_asset
FROM assets AS a
WHERE ' . $where . '
)
ORDER BY id_asset',
$params);
// Get a resource object for the asset thumbs.
$res_thumbs = $db->query('
SELECT id_asset, filename,
CONCAT(
width,
{string:x},
height,
IF(mode != {string:empty}, CONCAT({string:_}, mode), {string:empty})
) AS selector
FROM assets_thumbs
WHERE id_asset IN(
SELECT id_asset
FROM assets AS a
WHERE ' . $where . '
)
ORDER BY id_asset',
$params + [
'empty' => '',
'x' => 'x',
'_' => '_',
]);
$iterator = new self($res_assets, $res_meta, $res_thumbs, $return_format, $params['direction']);
// Returning total count, too?
if ($return_count)
{
$count = $db->queryValue('
SELECT COUNT(*)
FROM assets AS a
WHERE ' . $where,
$params);
return [$iterator, $count];
}
else
return $iterator;
}
public function isAscending()
{
return $this->direction === 'asc';
}
public function isDescending()
{
return $this->direction === 'desc';
}
}