src/Classes/Database.php

   1 <?php
   2     /**
   3      * Uguu
   4      *
   5      * @copyright Copyright (c) 2022-2023 Go Johansson (nokonoko) <neku@pomf.se>
   6      *
   7      * This program is free software: you can redistribute it and/or modify
   8      * it under the terms of the GNU General Public License as published by
   9      * the Free Software Foundation, either version 3 of the License, or
  10      * (at your option) any later version.
  11      *
  12      * This program is distributed in the hope that it will be useful,
  13      * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14      * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15      * GNU General Public License for more details.
  16      *
  17      * You should have received a copy of the GNU General Public License
  18      * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19      */
  20
  21     namespace Pomf\Uguu\Classes;
  22
  23     use PDO;
  24
  25     class Database
  26     {
  27         public function dbCheckNameExists(string $name):bool
  28         {
  29             $query = match ($this->dbType) {
  30                 'pgsql' => 'SELECT EXISTS(SELECT id FROM files WHERE filename = (:name)), filename FROM files WHERE filename = (:name) LIMIT 1',
  31                 default => 'SELECT filename FROM files WHERE filename = (:name) AND EXISTS (SELECT id FROM files WHERE filename = (:name)) LIMIT 1'
  32             };
  33             $q = $this->DB->prepare($query);
  34             $q->bindValue(':name', $name);
  35             $q->execute();
  36             $result = $q->fetch();
  37             $q->closeCursor();
  38             if (isset($result['exists']) and $result['exists']) {
  39                 return true;
  40             } elseif ($result) {
  41                 return true;
  42             }
  43             return false;
  44         }
  45
  46         public function checkFileBlacklist(string $hash):void
  47         {
  48             $query = match ($this->dbType) {
  49                 'pgsql' => 'SELECT EXISTS(SELECT id FROM blacklist WHERE hash = (:hash)), hash FROM blacklist WHERE hash = (:hash) LIMIT 1',
  50                 default => 'SELECT id FROM blacklist WHERE EXISTS(SELECT id FROM blacklist WHERE hash = (:hash)) LIMIT 1'
  51             };
  52             $q = $this->DB->prepare($query);
  53             $q->bindValue(':hash', $hash);
  54             $q->execute();
  55             $result = $q->fetch();
  56             $q->closeCursor();
  57             if (isset($result['exists']) and $result['exists']) {
  58                 $this->response->error(415, 'File blacklisted.');
  59             } elseif ($result) {
  60                 $this->response->error(415, 'File blacklisted.');
  61             }
  62         }
  63
  64         public function antiDupe(string $hash):array
  65         {
  66             $query = match ($this->dbType) {
  67                 'pgsql' => 'SELECT EXISTS(SELECT id FROM files WHERE hash = (:hash)), filename FROM files WHERE hash = (:hash) LIMIT 1',
  68                 default => 'SELECT filename FROM files WHERE hash = (:hash) AND EXISTS (SELECT id FROM files WHERE hash = (:hash)) LIMIT 1'
  69             };
  70             $q = $this->DB->prepare($query);
  71             $q->bindValue(':hash', $hash);
  72             $q->execute();
  73             $result = $q->fetch();
  74             $q->closeCursor();
  75             if (!$result) {
  76                 return [
  77                    'result' => false,
  78                 ];
  79             } else {
  80                 return [
  81                    'result' => true,
  82                    'name'   => $result['filename'],
  83                 ];
  84             }
  85         }
  86
  87         public function newIntoDB(array $FILE_INFO, array $fingerPrintInfo):void
  88         {
  89             $q = $this->DB->prepare(
  90                'INSERT INTO files (hash, originalname, filename, size, date, ip)' .
  91                'VALUES (:hash, :orig, :name, :size, :date, :ip)',
  92             );
  93             $q->bindValue(':hash', $FILE_INFO['SHA1']);
  94             $q->bindValue(':orig', $FILE_INFO['NAME']);
  95             $q->bindValue(':name', $FILE_INFO['FILENAME']);
  96             $q->bindValue(':size', $FILE_INFO['SIZE'], PDO::PARAM_INT);
  97             $q->bindValue(':date', $fingerPrintInfo['timestamp']);
  98             $q->bindValue(':ip', $fingerPrintInfo['ip']);
  99             $q->execute();
 100             $q->closeCursor();
 101         }
 102
 103         public function createRateLimit(array $fingerPrintInfo):void
 104         {
 105             $q = $this->DB->prepare(
 106                'INSERT INTO ratelimit (iphash, files, time)' .
 107                'VALUES (:iphash, :files, :time)',
 108             );
 109             $q->bindValue(':iphash', $fingerPrintInfo['ip_hash']);
 110             $q->bindValue(':files', $fingerPrintInfo['files_amount']);
 111             $q->bindValue(':time', $fingerPrintInfo['timestamp']);
 112             $q->execute();
 113             $q->closeCursor();
 114         }
 115
 116         public function updateRateLimit(int $fCount, bool $iStamp, array $fingerPrintInfo):void
 117         {
 118             if ($iStamp) {
 119                 $q = $this->DB->prepare(
 120                    'UPDATE ratelimit SET files = (:files), time = (:time) WHERE iphash = (:iphash)',
 121                 );
 122                 $q->bindValue(':time', $fingerPrintInfo['timestamp']);
 123             } else {
 124                 $q = $this->DB->prepare(
 125                    'UPDATE ratelimit SET files = (:files) WHERE iphash = (:iphash)',
 126                 );
 127             }
 128             $q->bindValue(':files', $fCount);
 129             $q->bindValue(':iphash', $fingerPrintInfo['ip_hash']);
 130             $q->execute();
 131             $q->closeCursor();
 132         }
 133
 134         public function compareTime(int $timestamp, int $seconds_d):bool
 135         {
 136             $diff = time() - $timestamp;
 137             if ($diff > $seconds_d) {
 138                 return true;
 139             }
 140             return false;
 141         }
 142
 143         public function checkRateLimit(array $fingerPrintInfo, int $rateTimeout, int $fileLimit):bool
 144         {
 145             $query = match ($this->dbType) {
 146                 'pgsql' => 'SELECT EXISTS(SELECT id FROM ratelimit WHERE iphash = (:iphash)), id, iphash, files, time FROM ratelimit WHERE iphash = (:iphash) LIMIT 1',
 147                 default => 'SELECT * FROM ratelimit WHERE iphash = (:iphash) AND EXISTS (SELECT id FROM ratelimit WHERE iphash = (:iphash)) LIMIT 1'
 148             };
 149             $q = $this->DB->prepare($query);
 150             $q->bindValue(':iphash', $fingerPrintInfo['ip_hash']);
 151             $q->execute();
 152             $result = $q->fetch();
 153             $q->closeCursor();
 154             //If there is no other match a record does not exist, create one.
 155             if (!$result) {
 156                 $this->createRateLimit($fingerPrintInfo);
 157                 return false;
 158             }
 159             // Apply rate-limit when file count reached and timeout not reached.
 160             if ($result['files'] === $fileLimit and !$this->compareTime($result['time'], $rateTimeout)) {
 161                 return true;
 162             }
 163             // Update timestamp if timeout reached, reset file count and add the incoming file count.
 164             if ($this->compareTime($result['time'], $rateTimeout)) {
 165                 $this->updateRateLimit($fingerPrintInfo['files_amount'], true, $fingerPrintInfo);
 166                 return false;
 167             }
 168             // Add filecount, timeout not reached.
 169             if ($result['files'] < $fileLimit and !$this->compareTime($result['time'], $rateTimeout)) {
 170                 $this->updateRateLimit($result['files'] + $fingerPrintInfo['files_amount'], false, $fingerPrintInfo);
 171                 return false;
 172             }
 173             return false;
 174         }
 175     }