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| 1 | <?php declare(strict_types=1); |
| 2 | /** |
| 3 | * PrivateBin |
| 4 | * |
| 5 | * a zero-knowledge paste bin |
| 6 | * |
| 7 | * @link https://github.com/PrivateBin/PrivateBin |
| 8 | * @copyright 2012 Sébastien SAUVAGE (sebsauvage.net) |
| 9 | * @license https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License |
| 10 | */ |
| 11 | |
| 12 | namespace PrivateBin\Model; |
| 13 | |
| 14 | use Exception; |
| 15 | use Identicon\Identicon; |
| 16 | use Jdenticon\Identicon as Jdenticon; |
| 17 | use PrivateBin\Persistence\TrafficLimiter; |
| 18 | use PrivateBin\Vizhash16x16; |
| 19 | |
| 20 | /** |
| 21 | * Comment |
| 22 | * |
| 23 | * Model of a PrivateBin comment. |
| 24 | */ |
| 25 | class Comment extends AbstractModel |
| 26 | { |
| 27 | /** |
| 28 | * Instance's parent. |
| 29 | * |
| 30 | * @access private |
| 31 | * @var Paste |
| 32 | */ |
| 33 | private $_paste; |
| 34 | |
| 35 | /** |
| 36 | * Store the comment's data. |
| 37 | * |
| 38 | * @access public |
| 39 | * @throws Exception |
| 40 | */ |
| 41 | public function store() |
| 42 | { |
| 43 | // Make sure paste exists. |
| 44 | $pasteid = $this->getPaste()->getId(); |
| 45 | if (!$this->getPaste()->exists()) { |
| 46 | throw new Exception('Invalid data.', 67); |
| 47 | } |
| 48 | |
| 49 | // Make sure the discussion is opened in this paste and in configuration. |
| 50 | if (!$this->getPaste()->isOpendiscussion() || !$this->_conf->getKey('discussion')) { |
| 51 | throw new Exception('Invalid data.', 68); |
| 52 | } |
| 53 | |
| 54 | // Check for improbable collision. |
| 55 | if ($this->exists()) { |
| 56 | throw new Exception('You are unlucky. Try again.', 69); |
| 57 | } |
| 58 | |
| 59 | $this->_data['meta']['created'] = time(); |
| 60 | |
| 61 | // store comment |
| 62 | if ( |
| 63 | $this->_store->createComment( |
| 64 | $pasteid, |
| 65 | $this->getParentId(), |
| 66 | $this->getId(), |
| 67 | $this->_data |
| 68 | ) === false |
| 69 | ) { |
| 70 | throw new Exception('Error saving comment. Sorry.', 70); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Delete the comment. |
| 76 | * |
| 77 | * @access public |
| 78 | * @throws Exception |
| 79 | */ |
| 80 | public function delete() |
| 81 | { |
| 82 | throw new Exception('To delete a comment, delete its parent paste', 64); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Test if comment exists in store. |
| 87 | * |
| 88 | * @access public |
| 89 | * @return bool |
| 90 | */ |
| 91 | public function exists() |
| 92 | { |
| 93 | return $this->_store->existsComment( |
| 94 | $this->getPaste()->getId(), |
| 95 | $this->getParentId(), |
| 96 | $this->getId() |
| 97 | ); |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Set paste. |
| 102 | * |
| 103 | * @access public |
| 104 | * @param Paste $paste |
| 105 | * @throws Exception |
| 106 | */ |
| 107 | public function setPaste(Paste $paste) |
| 108 | { |
| 109 | $this->_paste = $paste; |
| 110 | $this->_data['pasteid'] = $paste->getId(); |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * Get paste. |
| 115 | * |
| 116 | * @access public |
| 117 | * @return Paste |
| 118 | */ |
| 119 | public function getPaste() |
| 120 | { |
| 121 | return $this->_paste; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Set parent ID. |
| 126 | * |
| 127 | * @access public |
| 128 | * @param string $id |
| 129 | * @throws Exception |
| 130 | */ |
| 131 | public function setParentId($id) |
| 132 | { |
| 133 | if (!self::isValidId($id)) { |
| 134 | throw new Exception('Invalid paste ID.', 65); |
| 135 | } |
| 136 | $this->_data['parentid'] = $id; |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * Get parent ID. |
| 141 | * |
| 142 | * @access public |
| 143 | * @return string |
| 144 | */ |
| 145 | public function getParentId() |
| 146 | { |
| 147 | if (!array_key_exists('parentid', $this->_data)) { |
| 148 | $this->_data['parentid'] = $this->getPaste()->getId(); |
| 149 | } |
| 150 | return $this->_data['parentid']; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * Sanitizes data to conform with current configuration. |
| 155 | * |
| 156 | * @access protected |
| 157 | * @param array $data |
| 158 | * @return array |
| 159 | */ |
| 160 | protected function _sanitize(array $data) |
| 161 | { |
| 162 | // we generate an icon based on a SHA512 HMAC of the users IP, if configured |
| 163 | $icon = $this->_conf->getKey('icon'); |
| 164 | if ($icon != 'none') { |
| 165 | $pngdata = ''; |
| 166 | $hmac = TrafficLimiter::getHash(); |
| 167 | if ($icon == 'identicon') { |
| 168 | $identicon = new Identicon(); |
| 169 | $pngdata = $identicon->getImageDataUri($hmac, 16); |
| 170 | } elseif ($icon == 'jdenticon') { |
| 171 | $jdenticon = new Jdenticon(array( |
| 172 | 'hash' => $hmac, |
| 173 | 'size' => 16, |
| 174 | 'style' => array( |
| 175 | 'backgroundColor' => '#fff0', // fully transparent, for dark mode |
| 176 | 'padding' => 0, |
| 177 | ), |
| 178 | )); |
| 179 | $pngdata = $jdenticon->getImageDataUri('png'); |
| 180 | } elseif ($icon == 'vizhash') { |
| 181 | $vh = new Vizhash16x16(); |
| 182 | $pngdata = 'data:image/png;base64,' . base64_encode( |
| 183 | $vh->generate($hmac) |
| 184 | ); |
| 185 | } |
| 186 | if ($pngdata != '') { |
| 187 | if (!array_key_exists('meta', $data)) { |
| 188 | $data['meta'] = array(); |
| 189 | } |
| 190 | $data['meta']['icon'] = $pngdata; |
| 191 | } |
| 192 | } |
| 193 | return $data; |
| 194 | } |
| 195 | } |