mirror of
https://github.com/BookStackApp/BookStack.git
synced 2024-10-01 05:36:00 +00:00
70 lines
2.4 KiB
PHP
70 lines
2.4 KiB
PHP
|
<?php
|
||
|
|
||
|
namespace BookStack\Uploads;
|
||
|
|
||
|
use Illuminate\Http\UploadedFile;
|
||
|
use Intervention\Image\ImageManager;
|
||
|
|
||
|
class FaviconHandler
|
||
|
{
|
||
|
public function __construct(
|
||
|
protected ImageManager $imageTool
|
||
|
) {
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Save the given UploadedFile instance as the application favicon.
|
||
|
*/
|
||
|
public function saveForUploadedImage(UploadedFile $file): void
|
||
|
{
|
||
|
$imageData = file_get_contents($file->getRealPath());
|
||
|
$image = $this->imageTool->make($imageData);
|
||
|
$image->resize(32, 32);
|
||
|
$bmpData = $image->encode('bmp');
|
||
|
$icoData = $this->bmpToIco($bmpData, 32, 32);
|
||
|
|
||
|
// TODO - Below are test paths
|
||
|
file_put_contents(public_path('uploads/test.ico'), $icoData);
|
||
|
file_put_contents(public_path('uploads/test.bmp'), $bmpData);
|
||
|
|
||
|
// TODO - Permission check for icon overwrite
|
||
|
// TODO - Write to correct location
|
||
|
// TODO - Handle deletion and restore of original icon on user icon clear
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Convert BMP image data to ICO file format.
|
||
|
* Built following the file format info from Wikipedia:
|
||
|
* https://en.wikipedia.org/wiki/ICO_(file_format)
|
||
|
*/
|
||
|
protected function bmpToIco(string $bmpData, int $width, int $height): string
|
||
|
{
|
||
|
// Trim off the header of the bitmap file
|
||
|
$rawBmpData = substr($bmpData, 14);
|
||
|
|
||
|
// ICO header
|
||
|
$header = pack('v', 0x00); // Reserved. Must always be 0
|
||
|
$header .= pack('v', 0x01); // Specifies ico image
|
||
|
$header .= pack('v', 0x01); // Specifies number of images
|
||
|
|
||
|
// ICO Image Directory
|
||
|
$entry = hex2bin(dechex($width)); // Image width
|
||
|
$entry .= hex2bin(dechex($height)); // Image height
|
||
|
$entry .= "\0"; // Color palette, typically 0
|
||
|
$entry .= "\0"; // Reserved
|
||
|
|
||
|
// Color planes, Appears to remain 1 for bmp image data
|
||
|
$entry .= pack('v', 0x01);
|
||
|
// Bits per pixel, can range from 1 to 32. From testing conversion
|
||
|
// via intervention from png typically provides this as 32.
|
||
|
$entry .= pack('v', 0x20);
|
||
|
// Size of the image data in bytes
|
||
|
$entry .= pack('V', strlen($rawBmpData));
|
||
|
// Offset of the bmp data from file start
|
||
|
$entry .= pack('V', strlen($header) + strlen($entry) + 4);
|
||
|
|
||
|
// Join & return the combined parts of the ICO image data
|
||
|
return $header . $entry . $rawBmpData;
|
||
|
}
|
||
|
}
|