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<?php
class Upload extends Model {
const DB_TABLE = 'uploads';
public static array $ImageExtensions = ['jpg', 'jpeg', 'png', 'gif'];
public static array $VideoExtensions = ['mp4', 'ogg'];
public int $id;
public string $randomId;
public int $ts;
public string $name;
public int $size;
public int $downloads;
public int $image; // TODO: remove
public int $imageW;
public int $imageH;
public string $note;
public function getDirectory(): string {
global $config;
return $config['uploads_dir'].'/'.$this->randomId;
}
public function getDirectUrl(): string {
global $config;
return 'https://'.$config['uploads_host'].'/'.$this->randomId.'/'.$this->name;
}
public function getDirectPreviewUrl(int $w, int $h, bool $retina = false): string {
global $config;
if ($w == $this->imageW && $this->imageH == $h)
return $this->getDirectUrl();
if ($retina) {
$w *= 2;
$h *= 2;
}
$prefix = $this->imageMayHaveAlphaChannel() ? 'a' : 'p';
return 'https://'.$config['uploads_host'].'/'.$this->randomId.'/'.$prefix.$w.'x'.$h.'.jpg';
}
// TODO remove?
public function incrementDownloads() {
$db = getDb();
$db->query("UPDATE uploads SET downloads=downloads+1 WHERE id=?", $this->id);
$this->downloads++;
}
public function getSize(): string {
return sizeString($this->size);
}
public function getMarkdown(): string {
if ($this->isImage()) {
$md = '{image:'.$this->randomId.',w='.$this->imageW.',h='.$this->imageH.'}{/image}';
} else if ($this->isVideo()) {
$md = '{video:'.$this->randomId.'}{/video}';
} else {
$md = '{fileAttach:'.$this->randomId.'}{/fileAttach}';
}
$md .= ' <!-- '.$this->name.' -->';
return $md;
}
public function setNote(string $note) {
$db = getDb();
$db->query("UPDATE uploads SET note=? WHERE id=?", $note, $this->id);
}
public function isImage(): bool {
return in_array(extension($this->name), self::$ImageExtensions);
}
// assume all png images have alpha channel
// i know this is wrong, but anyway
public function imageMayHaveAlphaChannel(): bool {
return strtolower(extension($this->name)) == 'png';
}
public function isVideo(): bool {
return in_array(extension($this->name), self::$VideoExtensions);
}
public function getImageRatio(): float {
return $this->imageW / $this->imageH;
}
public function getImagePreviewSize(?int $w = null, ?int $h = null): array {
if (is_null($w) && is_null($h))
throw new Exception(__METHOD__.': both width and height can\'t be null');
if (is_null($h))
$h = round($w / $this->getImageRatio());
if (is_null($w))
$w = round($h * $this->getImageRatio());
return [$w, $h];
}
public function createImagePreview(?int $w = null,
?int $h = null,
bool $force_update = false,
bool $may_have_alpha = false): bool {
global $config;
$orig = $config['uploads_dir'].'/'.$this->randomId.'/'.$this->name;
$updated = false;
foreach (themes::getThemes() as $theme) {
if (!$may_have_alpha && $theme == 'dark')
continue;
for ($mult = 1; $mult <= 2; $mult++) {
$dw = $w * $mult;
$dh = $h * $mult;
$prefix = $may_have_alpha ? 'a' : 'p';
$dst = $config['uploads_dir'].'/'.$this->randomId.'/'.$prefix.$dw.'x'.$dh.($theme == 'dark' ? '_dark' : '').'.jpg';
if (file_exists($dst)) {
if (!$force_update)
continue;
unlink($dst);
}
$img = imageopen($orig);
imageresize($img, $dw, $dh, themes::getThemeAlphaColorAsRGB($theme));
imagejpeg($img, $dst, $mult == 1 ? 93 : 67);
imagedestroy($img);
setperm($dst);
$updated = true;
}
}
return $updated;
}
/**
* @return int Number of deleted files
*/
public function deleteAllImagePreviews(): int {
global $config;
$dir = $config['uploads_dir'].'/'.$this->randomId;
$files = scandir($dir);
$deleted = 0;
foreach ($files as $f) {
if (preg_match('/^[ap](\d+)x(\d+)(?:_dark)?\.jpg$/', $f)) {
if (is_file($dir.'/'.$f))
unlink($dir.'/'.$f);
else
logError(__METHOD__.': '.$dir.'/'.$f.' is not a file!');
$deleted++;
}
}
return $deleted;
}
}
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