m1k1oblog/app/image.class.php
2020-06-25 18:12:01 +02:00

189 lines
No EOL
4.4 KiB
PHP

<?php
defined('PROJECT_PATH') OR exit('No direct script access allowed');
class Image
{
const THUMB_W = 476;
const THUMB_H = 476;
const PHP_FILE_UPLOAD_ERRORS = [
0 => 'There is no error, the file uploaded with success.',
1 => 'The uploaded file exceeds the upload_max_filesize directive in php.ini.',
2 => 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form.',
3 => 'The uploaded file was only partially uploaded.',
4 => 'No file was uploaded.',
6 => 'Missing a temporary folder.',
7 => 'Failed to write file to disk.',
8 => 'A PHP extension stopped the file upload.',
];
private static function random_str($len = 10){
$chr = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
$chr_len = strlen($chr);
$random_str = '';
for($i = 0; $i < $len; $i++){
$random_str .= $chr[rand(0, $chr_len - 1)];
}
return $random_str;
}
private static function fix_orientation($path, $img){
if(!function_exists('exif_read_data')){
return $img;
}
$exif = exif_read_data($path);
if(!$exif || !isset($exif['Orientation'])){
return $img;
}
$deg = 0;
switch($exif['Orientation']){
case 3:
$deg = 180;
break;
case 6:
$deg = 270;
break;
case 8:
$deg = 90;
break;
}
if($deg){
return imagerotate($img, $deg, 0);
}
return $img;
}
private static function thumb($source_path, $thumb_path){
ini_set('memory_limit', '128M');
$source_details = getimagesize($source_path);
$source_w = $source_details[0];
$source_h = $source_details[1];
if($source_w > $source_h){
$new_w = self::THUMB_W;
$new_h = intval($source_h * $new_w / $source_w);
} else {
$new_h = self::THUMB_H;
$new_w = intval($source_w * $new_h / $source_h);
}
switch($source_details[2]){
case IMAGETYPE_GIF:
$imgt = "imagegif";
$imgcreatefrom = "imagecreatefromgif";
break;
case IMAGETYPE_JPEG:
$imgt = "imagejpeg";
$imgcreatefrom = "imagecreatefromjpeg";
break;
case IMAGETYPE_PNG:
$imgt = "imagepng";
$imgcreatefrom = "imagecreatefrompng";
break;
case IMAGETYPE_WEBP:
$imgt = "imagewebp";
$imgcreatefrom = "imagecreatefromwebp";
break;
case IMAGETYPE_WBMP:
$imgt = "imagewbmp";
$imgcreatefrom = "imagecreatefromwbmp";
break;
case IMAGETYPE_BMP:
$imgt = "imagebmp";
$imgcreatefrom = "imagecreatefrombmp";
break;
default:
return false;
}
$old_image = $imgcreatefrom($source_path);
$new_image = imagecreatetruecolor($new_w, $new_h);
imagecopyresampled($new_image, $old_image, 0, 0, 0, 0, $new_w, $new_h, $source_w, $source_h);
$new_image = self::fix_orientation($source_path, $new_image);
$old_image = self::fix_orientation($source_path, $old_image);
$imgt($new_image, $thumb_path);
$imgt($old_image, $source_path);
return true;
}
public static function upload(){
if(!$_FILES){
throw new Exception("No file.");
}
// Create MD5
$md5 = md5_file($_FILES['file']['tmp_name']);
// Find duplicate
if($d = DB::get_instance()->query("SELECT `path`, `thumb` FROM `images` WHERE `md5` = ? AND `status` = 1 LIMIT 1", $md5)->first()){
return $d;
}
// Ensure, that directories exists
$_images_path = Config::get('images_path');
$_thumbnails_path = Config::get('thumbnails_path');
if(
(!is_dir($_images_path) && !mkdir($_images_path, 0755, true)) ||
(!is_dir($_thumbnails_path) && !mkdir($_thumbnails_path, 0755, true))
){
throw new Exception("Images or thumbnails directory could not be created.");
}
// Get metadata
$name = $_FILES['file']['name'];
$ext = pathinfo($name, PATHINFO_EXTENSION);
// Save to DB
$id = DB::get_instance()->insert('images', [
'name' => $name,
'type' => $ext,
'md5' => $md5,
'datetime' => 'NOW()',
'status' => 0,
])->last_id();
// Create path name
$name = dechex($id).self::random_str(3).".".$ext;
$path = $_images_path.$name;
$thumb = $_thumbnails_path.$name;
// Save path
if(!move_uploaded_file($_FILES['file']['tmp_name'], $path)){
throw new Exception(self::PHP_FILE_UPLOAD_ERRORS[$_FILES['file']['error']]);
}
// Create thumb
if(!self::thumb($path, $thumb)){
unlink($path);
unlink($thumb);
throw new Exception("File is not valid image.");
}
// Save to DB
DB::get_instance()->update('images', [
'path' => $path,
'thumb' => $thumb,
'status' => 1,
], "WHERE `id` = ?", $id);
return [
"path" => $path,
"thumb" => $thumb
];
}
}