114 lines
3.0 KiB
PHP
114 lines
3.0 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright (C) 2010-2022, the Friendica project
|
|
*
|
|
* @license GNU AGPL version 3 or any later version
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as
|
|
* published by the Free Software Foundation, either version 3 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* 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. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
namespace Friendica\Model;
|
|
|
|
/**
|
|
* This class handles FileTag related functions
|
|
*
|
|
* post categories and "save to file" use the same item.file table for storage.
|
|
* We will differentiate the different uses by wrapping categories in angle brackets
|
|
* and save to file categories in square brackets.
|
|
* To do this we need to escape these characters if they appear in our tag.
|
|
*/
|
|
class FileTag
|
|
{
|
|
/**
|
|
* URL encode <, >, left and right brackets
|
|
*
|
|
* @param string $s String to be URL encoded.
|
|
* @return string The URL encoded string.
|
|
*/
|
|
private static function encode(string $s): string
|
|
{
|
|
return str_replace(['<', '>', '[', ']'], ['%3c', '%3e', '%5b', '%5d'], $s);
|
|
}
|
|
|
|
/**
|
|
* URL decode <, >, left and right brackets
|
|
*
|
|
* @param string $s The URL encoded string to be decoded
|
|
* @return string The decoded string.
|
|
*/
|
|
private static function decode(string $s): string
|
|
{
|
|
return str_replace(['%3c', '%3e', '%5b', '%5d'], ['<', '>', '[', ']'], $s);
|
|
}
|
|
|
|
/**
|
|
* Get file tags from array
|
|
*
|
|
* ex. given [music,video] return <music><video> or [music][video]
|
|
*
|
|
* @param array $array A list of tags.
|
|
* @param string $type Optional file type.
|
|
* @return string A list of file tags.
|
|
*/
|
|
public static function arrayToFile(array $array, string $type = 'file'): string
|
|
{
|
|
$tag_list = '';
|
|
if ($type == 'file') {
|
|
$lbracket = '[';
|
|
$rbracket = ']';
|
|
} else {
|
|
$lbracket = '<';
|
|
$rbracket = '>';
|
|
}
|
|
|
|
foreach ($array as $item) {
|
|
if (strlen($item)) {
|
|
$tag_list .= $lbracket . self::encode(trim($item)) . $rbracket;
|
|
}
|
|
}
|
|
|
|
return $tag_list;
|
|
}
|
|
|
|
/**
|
|
* Get tag list from file tags
|
|
*
|
|
* ex. given <music><video>[friends], return [music,video] or [friends]
|
|
*
|
|
* @param string $file File tags
|
|
* @param string $type Optional file type.
|
|
* @return array List of tag names.
|
|
*/
|
|
public static function fileToArray(string $file, string $type = 'file'): array
|
|
{
|
|
$matches = [];
|
|
$return = [];
|
|
|
|
if ($type == 'file') {
|
|
$cnt = preg_match_all('/\[(.*?)\]/', $file, $matches, PREG_SET_ORDER);
|
|
} else {
|
|
$cnt = preg_match_all('/<(.*?)>/', $file, $matches, PREG_SET_ORDER);
|
|
}
|
|
|
|
if ($cnt) {
|
|
foreach ($matches as $match) {
|
|
$return[] = self::decode($match[1]);
|
|
}
|
|
}
|
|
|
|
return $return;
|
|
}
|
|
}
|