Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
/**
* @file src/Model/FileTag.php
*/
namespace Friendica\Model;
use Friendica\Core\L10n;
use Friendica\Core\PConfig;
use Friendica\Database\DBA;
use Friendica\DI;
/**
* @brief 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
{
/**
* @brief URL encode <, >, left and right brackets
*
* @param string $s String to be URL encoded.
*
* @return string The URL encoded string.
*/
public static function encode($s)
{
return str_replace(['<', '>', '[', ']'], ['%3c', '%3e', '%5b', '%5d'], $s);
}
/**
* @brief URL decode <, >, left and right brackets
*
* @param string $s The URL encoded string to be decoded
*
* @return string The decoded string.
*/
public static function decode($s)
{
return str_replace(['%3c', '%3e', '%5b', '%5d'], ['<', '>', '[', ']'], $s);
}
/**
* @brief Query files for tag
*
* @param string $table The table to be queired.
* @param string $s The search term
* @param string $type Optional file type.
*
* @return string Query string.
*/
public static function fileQuery($table, $s, $type = 'file')
{
if ($type == 'file') {
$str = preg_quote('[' . str_replace('%', '%%', self::encode($s)) . ']');
} else {
$str = preg_quote('<' . str_replace('%', '%%', self::encode($s)) . '>');
}
return " AND " . (($table) ? DBA::escape($table) . '.' : '') . "file regexp '" . DBA::escape($str) . "' ";
}
/**
* 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')
{
$tag_list = '';
if ($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')
{
$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;
}
/**
* @brief Get file tags from list
*
* ex. given music,video return <music><video> or [music][video]
* @param string $list A comma delimited list of tags.
* @param string $type Optional file type.
*
* @return string A list of file tags.
* @deprecated since 2019.06 use arrayToFile() instead
*/
public static function listToFile(string $list, string $type = 'file')
{
$list_array = explode(',', $list);
return self::arrayToFile($list_array, $type);
}
/**
* @brief Get 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 string Comma delimited list of tag names.
* @deprecated since 2019.06 use fileToArray() instead
*/
public static function fileToList(string $file, $type = 'file')
{
return implode(',', self::fileToArray($file, $type));
}
/**
* @brief Update file tags in PConfig
*
* @param int $uid Unique Identity.
* @param string $file_old Categories previously associated with an item
* @param string $file_new New list of categories for an item
* @param string $type Optional file type.
*
* @return boolean A value indicating success or failure.
* @throws \Exception
*/
public static function updatePconfig(int $uid, string $file_old, string $file_new, string $type = 'file')
{
if (!intval($uid)) {
return false;
} elseif ($file_old == $file_new) {
return true;
}
$saved = DI::pConfig()->get($uid, 'system', 'filetags');
if (strlen($saved)) {
if ($type == 'file') {
$lbracket = '[';
$rbracket = ']';
$termtype = TERM_FILE;
} else {
$lbracket = '<';
$rbracket = '>';
$termtype = TERM_CATEGORY;
}
$filetags_updated = $saved;
// check for new tags to be added as filetags in pconfig
$new_tags = [];
foreach (self::fileToArray($file_new, $type) as $tag) {
if (!stristr($saved, $lbracket . self::encode($tag) . $rbracket)) {
$new_tags[] = $tag;
}
}
$filetags_updated .= self::arrayToFile($new_tags, $type);
// check for deleted tags to be removed from filetags in pconfig
$deleted_tags = [];
foreach (self::fileToArray($file_old, $type) as $tag) {
if (!stristr($file_new, $lbracket . self::encode($tag) . $rbracket)) {
$deleted_tags[] = $tag;
}
}
foreach ($deleted_tags as $key => $tag) {
$r = q("SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d",
DBA::escape($tag),
intval(Term::OBJECT_TYPE_POST),
intval($termtype),
intval($uid));
if (DBA::isResult($r)) {
unset($deleted_tags[$key]);
} else {
$filetags_updated = str_replace($lbracket . self::encode($tag) . $rbracket, '', $filetags_updated);
}
}
if ($saved != $filetags_updated) {
DI::pConfig()->set($uid, 'system', 'filetags', $filetags_updated);
}
return true;
} elseif (strlen($file_new)) {
DI::pConfig()->set($uid, 'system', 'filetags', $file_new);
}
return true;
}
/**
* @brief Add tag to file
*
* @param int $uid Unique identity.
* @param int $item_id Item identity.
* @param string $file File tag.
*
* @return boolean A value indicating success or failure.
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
public static function saveFile($uid, $item_id, $file)
{
if (!intval($uid)) {
return false;
}
$item = Item::selectFirst(['file'], ['id' => $item_id, 'uid' => $uid]);
if (DBA::isResult($item)) {
if (!stristr($item['file'], '[' . self::encode($file) . ']')) {
$fields = ['file' => $item['file'] . '[' . self::encode($file) . ']'];
Item::update($fields, ['id' => $item_id]);
}
$saved = DI::pConfig()->get($uid, 'system', 'filetags');
if (!strlen($saved) || !stristr($saved, '[' . self::encode($file) . ']')) {
DI::pConfig()->set($uid, 'system', 'filetags', $saved . '[' . self::encode($file) . ']');
}
info(L10n::t('Item filed'));
}
return true;
}
/**
* @brief Remove tag from file
*
* @param int $uid Unique identity.
* @param int $item_id Item identity.
* @param string $file File tag.
* @param boolean $cat Optional value indicating the term type (i.e. Category or File)
*
* @return boolean A value indicating success or failure.
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
public static function unsaveFile($uid, $item_id, $file, $cat = false)
{
if (!intval($uid)) {
return false;
}
if ($cat == true) {
$pattern = '<' . self::encode($file) . '>';
$termtype = Term::CATEGORY;
} else {
$pattern = '[' . self::encode($file) . ']';
$termtype = Term::FILE;
}
$item = Item::selectFirst(['file'], ['id' => $item_id, 'uid' => $uid]);
if (!DBA::isResult($item)) {
return false;
}
$fields = ['file' => str_replace($pattern, '', $item['file'])];
Item::update($fields, ['id' => $item_id]);
$r = q("SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d",
DBA::escape($file),
intval(Term::OBJECT_TYPE_POST),
intval($termtype),
intval($uid)
);
if (!DBA::isResult($r)) {
$saved = DI::pConfig()->get($uid, 'system', 'filetags');
DI::pConfig()->set($uid, 'system', 'filetags', str_replace($pattern, '', $saved));
}
return true;
}
}