src/Classes/Database.php

   1 <?php
   2
   3     /**
   4      * Uguu
   5      *
   6      * @copyright Copyright (c) 2022 Go Johansson (nokonoko) <neku@pomf.se>
   7      *
   8      * This program is free software: you can redistribute it and/or modify
   9      * it under the terms of the GNU General Public License as published by
  10      * the Free Software Foundation, either version 3 of the License, or
  11      * (at your option) any later version.
  12      *
  13      * This program is distributed in the hope that it will be useful,
  14      * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15      * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16      * GNU General Public License for more details.
  17      *
  18      * You should have received a copy of the GNU General Public License
  19      * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  20      */
  21
  22     namespace Pomf\Uguu\Classes;
  23
  24     use Exception;
  25     use PDO;
  26
  27 class Database
  28 {
  29     private PDO $DB;
  30
  31     /**
  32      * Sets the value of the DB variable.
  33      *
  34      * @param $DB PDO The database connection.
  35      */
  36     public function setDB(PDO $DB): void
  37     {
  38         $this->DB = $DB;
  39     }
  40
  41     /**
  42      * Checks if a file name exists in the database
  43      *
  44      * @param $name string The name of the file.
  45      *
  46      * @return int The number of rows that match the query.
  47      * @throws \Exception
  48      */
  49     public function dbCheckNameExists(string $name): int
  50     {
  51         try {
  52             $q = $this->DB->prepare('SELECT COUNT(filename) FROM files WHERE filename = (:name)');
  53             $q->bindValue(':name', $name);
  54             $q->execute();
  55             return $q->fetchColumn();
  56         } catch (Exception) {
  57             throw new Exception('Cant check if name exists in DB.', 500);
  58         }
  59     }
  60
  61     /**
  62      * Checks if the file is blacklisted
  63      *
  64      * @param $FILE_INFO array An array containing the following:
  65      *
  66      * @throws \Exception
  67      */
  68     public function checkFileBlacklist(array $FILE_INFO): void
  69     {
  70         try {
  71             $q = $this->DB->prepare('SELECT hash, COUNT(*) AS count FROM blacklist WHERE hash = (:hash)');
  72             $q->bindValue(':hash', $FILE_INFO['SHA1']);
  73             $q->execute();
  74             $result = $q->fetch();
  75             if ($result['count'] > 0) {
  76                 throw new Exception('File blacklisted!', 415);
  77             }
  78         } catch (Exception) {
  79             throw new Exception('Cant check blacklist DB.', 500);
  80         }
  81     }
  82
  83     /**
  84      * Checks if the file already exists in the database
  85      *
  86      * @param $hash string The hash of the file you want to check for.
  87      *
  88      * @throws \Exception
  89      */
  90     public function antiDupe(string $hash): array
  91     {
  92         try {
  93             $q = $this->DB->prepare(
  94                 'SELECT filename, COUNT(*) AS count FROM files WHERE hash = (:hash)',
  95             );
  96             $q->bindValue(':hash', $hash);
  97             $q->execute();
  98             $result = $q->fetch();
  99             if ($result['count'] > 0) {
 100                 return [
 101                 'result' => true,
 102                 'name' => $result['filename'],
 103                 ];
 104             } else {
 105                 return [
 106                    'result' => false
 107                 ];
 108             }
 109         } catch (Exception) {
 110             throw new Exception('Cant check for dupes in DB.', 500);
 111         }
 112     }
 113
 114     /**
 115      * Inserts a new file into the database
 116      *
 117      * @param $FILE_INFO       array
 118      * @param $fingerPrintInfo array
 119      *
 120      * @throws \Exception
 121      */
 122     public function newIntoDB(array $FILE_INFO, array $fingerPrintInfo): void
 123     {
 124         try {
 125             $q = $this->DB->prepare(
 126                 'INSERT INTO files (hash, originalname, filename, size, date, ip)' .
 127                 'VALUES (:hash, :orig, :name, :size, :date, :ip)',
 128             );
 129             $q->bindValue(':hash', $FILE_INFO['SHA1']);
 130             $q->bindValue(':orig', $FILE_INFO['NAME']);
 131             $q->bindValue(':name', $FILE_INFO['NEW_NAME']);
 132             $q->bindValue(':size', $FILE_INFO['SIZE'], PDO::PARAM_INT);
 133             $q->bindValue(':date', $fingerPrintInfo['timestamp']);
 134             $q->bindValue(':ip', $fingerPrintInfo['ip']);
 135             $q->execute();
 136         } catch (Exception) {
 137             throw new Exception('Cant insert into DB.', 500);
 138         }
 139     }
 140
 141     /**
 142      * Creates a new row in the database with the information provided
 143      *
 144      * @param $fingerPrintInfo array
 145      */
 146     public function createRateLimit(array $fingerPrintInfo): void
 147     {
 148         $q = $this->DB->prepare(
 149             'INSERT INTO timestamp (iphash, files, time)' .
 150             'VALUES (:iphash, :files, :time)',
 151         );
 152         $q->bindValue(':iphash', $fingerPrintInfo['ip_hash']);
 153         $q->bindValue(':files', $fingerPrintInfo['files_amount']);
 154         $q->bindValue(':time', $fingerPrintInfo['timestamp']);
 155         $q->execute();
 156     }
 157
 158     /**
 159      * Update the rate limit table with the new file count and timestamp
 160      *
 161      * @param $fCount          int The number of files uploaded by the user.
 162      * @param $iStamp          boolean A boolean value that determines whether or not to update the timestamp.
 163      * @param $fingerPrintInfo array An array containing the following keys:
 164      */
 165     public function updateRateLimit(int $fCount, bool $iStamp, array $fingerPrintInfo): void
 166     {
 167         if ($iStamp) {
 168             $q = $this->DB->prepare(
 169                 'UPDATE ratelimit SET files = (:files), time = (:time) WHERE iphash = (:iphash)',
 170             );
 171             $q->bindValue(':time', $fingerPrintInfo['timestamp']);
 172         } else {
 173             $q = $this->DB->prepare(
 174                 'UPDATE ratelimit SET files = (:files) WHERE iphash = (:iphash)',
 175             );
 176         }
 177         $q->bindValue(':files', $fCount);
 178         $q->bindValue(':iphash', $fingerPrintInfo['ip_hash']);
 179         $q->execute();
 180     }
 181
 182     /**
 183      * Checks if the user has uploaded more than 100 files in the last minute, if so it returns true, if not it updates the database with the new file
 184      * count and timestamp
 185      *
 186      * @param $fingerPrintInfo array An array containing the following:
 187      *
 188      * @return bool A boolean value.
 189      */
 190     public function checkRateLimit(array $fingerPrintInfo): bool
 191     {
 192         $q = $this->DB->prepare(
 193             'SELECT files, time, iphash, COUNT(*) AS count FROM ratelimit WHERE iphash = (:iphash)',
 194         );
 195         $q->bindValue(':iphash', $fingerPrintInfo['ip_hash']);
 196         $q->execute();
 197         $result = $q->fetch();
 198         $nTime = $fingerPrintInfo['timestamp'] - (60);
 199         switch (true) {
 200             //If more then 100 files trigger rate-limit
 201             case $result['files'] > 100:
 202                 return true;
 203             //if timestamp is older than one minute, set new files count and timestamp
 204             case $result['time'] < $nTime:
 205                 $this->updateRateLimit($fingerPrintInfo['files_amount'], true, $fingerPrintInfo);
 206                 break;
 207             //if timestamp isn't older than one-minute update the files count
 208             case $result['time'] > $nTime:
 209                 $this->updateRateLimit($fingerPrintInfo['files_amount'] + $result['files'], false, $fingerPrintInfo);
 210                 break;
 211             //If there is no other match a record does not exist, create one
 212             default:
 213                 $this->createRateLimit($fingerPrintInfo);
 214                 break;
 215         }
 216         return false;
 217     }
 218 }