SimpleMachines /
SMF2.1
| Total Complexity | 87 |
| Total Lines | 414 |
| Duplicated Lines | 0 % |
| Changes | 0 | ||
Complex classes like browser_detector often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use browser_detector, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 30 | class browser_detector |
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| 31 | { |
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| 32 | /** |
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| 33 | * @var array Holds all the browser information. Its contents will be placed into $context['browser'] |
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| 34 | */ |
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| 35 | private $_browsers = null; |
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| 36 | |||
| 37 | /** |
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| 38 | * @var boolean Whether or not this might be a mobile device |
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| 39 | */ |
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| 40 | private $_is_mobile = null; |
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| 41 | |||
| 42 | /** |
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| 43 | * The main method of this class, you know the one that does the job: detect the thing. |
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| 44 | * - determines the user agent (browser) as best it can. |
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| 45 | */ |
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| 46 | function detectBrowser() |
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| 47 | { |
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| 48 | global $context, $user_info; |
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| 49 | |||
| 50 | // Init |
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| 51 | $this->_browsers = array(); |
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| 52 | $this->_is_mobile = false; |
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| 53 | |||
| 54 | // Initialize some values we'll set differently if necessary... |
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| 55 | $this->_browsers['needs_size_fix'] = false; |
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| 56 | |||
| 57 | // One at a time, one at a time, and in this order too |
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| 58 | if ($this->isOpera()) |
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| 59 | $this->setupOpera(); |
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| 60 | // Meh... |
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| 61 | elseif ($this->isEdge()) |
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| 62 | $this->setupEdge(); |
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| 63 | // Them webkits need to be set up too |
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| 64 | elseif ($this->isWebkit()) |
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| 65 | $this->setupWebkit(); |
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| 66 | // We may have work to do on Firefox... |
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| 67 | elseif ($this->isFirefox()) |
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| 68 | $this->setupFirefox(); |
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| 69 | // Old friend, old frenemy |
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| 70 | elseif ($this->isIe()) |
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| 71 | $this->setupIe(); |
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| 72 | |||
| 73 | // Just a few mobile checks |
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| 74 | $this->isOperaMini(); |
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| 75 | $this->isOperaMobi(); |
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| 76 | |||
| 77 | // IE11 seems to be fine by itself without being lumped into the "is_ie" category |
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| 78 | $this->isIe11(); |
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| 79 | |||
| 80 | // Be you robot or human? |
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| 81 | if ($user_info['possibly_robot']) |
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| 82 | { |
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| 83 | // This isn't meant to be reliable, it's just meant to catch most bots to prevent PHPSESSID from showing up. |
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| 84 | $this->_browsers['possibly_robot'] = !empty($user_info['possibly_robot']); |
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| 85 | |||
| 86 | // Robots shouldn't be logging in or registering. So, they aren't a bot. Better to be wrong than sorry (or people won't be able to log in!), anyway. |
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| 87 | if ((isset($_REQUEST['action']) && in_array($_REQUEST['action'], array('login', 'login2', 'register', 'signup'))) || !$user_info['is_guest']) |
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| 88 | $this->_browsers['possibly_robot'] = false; |
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| 89 | } |
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| 90 | else |
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| 91 | $this->_browsers['possibly_robot'] = false; |
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| 92 | |||
| 93 | // Fill out the historical array as needed to support old mods that don't use isBrowser |
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| 94 | $this->fillInformation(); |
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| 95 | |||
| 96 | // Last step ... |
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| 97 | $this->setupBrowserPriority(); |
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| 98 | |||
| 99 | // Now see what you've done! |
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| 100 | $context['browser'] = $this->_browsers; |
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| 101 | } |
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| 102 | |||
| 103 | /** |
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| 104 | * Determine if the browser is Opera or not |
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| 105 | * @return boolean Whether or not this is Opera |
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| 106 | */ |
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| 107 | function isOpera() |
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| 108 | { |
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| 109 | if (!isset($this->_browsers['is_opera'])) |
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| 110 | $this->_browsers['is_opera'] = strpos($_SERVER['HTTP_USER_AGENT'], 'Opera') !== false; |
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| 111 | return $this->_browsers['is_opera']; |
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| 112 | } |
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| 113 | |||
| 114 | /** |
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| 115 | * Determine if the browser is IE or not |
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| 116 | * @return boolean true Whether or not the browser is IE |
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| 117 | */ |
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| 118 | function isIe() |
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| 119 | { |
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| 120 | // I'm IE, Yes I'm the real IE; All you other IEs are just imitating. |
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| 121 | if (!isset($this->_browsers['is_ie'])) |
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| 122 | $this->_browsers['is_ie'] = !$this->isOpera() && !$this->isGecko() && !$this->isWebTv() && preg_match('~MSIE \d+~', $_SERVER['HTTP_USER_AGENT']) === 1; |
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| 123 | return $this->_browsers['is_ie']; |
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| 124 | } |
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| 125 | |||
| 126 | /** |
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| 127 | * Determine if the browser is IE11 or not |
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| 128 | * @return boolean Whether or not the browser is IE11 |
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| 129 | */ |
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| 130 | function isIe11() |
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| 131 | { |
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| 132 | // IE11 is a bit different than earlier versions |
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| 133 | // The isGecko() part is to ensure we get this right... |
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| 134 | if (!isset($this->_browsers['is_ie11'])) |
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| 135 | $this->_browsers['is_ie11'] = strpos($_SERVER['HTTP_USER_AGENT'], 'Trident') !== false && $this->isGecko(); |
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| 136 | return $this->_browsers['is_ie11']; |
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| 137 | } |
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| 138 | |||
| 139 | /** |
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| 140 | * Determine if the browser is Edge or not |
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| 141 | * @return boolean Whether or not the browser is Edge |
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| 142 | */ |
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| 143 | function isEdge() |
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| 144 | { |
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| 145 | if (!isset($this->_browsers['is_edge'])) |
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| 146 | $this->_browsers['is_edge'] = strpos($_SERVER['HTTP_USER_AGENT'], 'Edge') !== false; |
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| 147 | return $this->_browsers['is_edge']; |
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| 148 | } |
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| 149 | |||
| 150 | /** |
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| 151 | * Determine if the browser is a Webkit based one or not |
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| 152 | * @return boolean Whether or not this is a Webkit-based browser |
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| 153 | */ |
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| 154 | function isWebkit() |
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| 155 | { |
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| 156 | if (!isset($this->_browsers['is_webkit'])) |
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| 157 | $this->_browsers['is_webkit'] = strpos($_SERVER['HTTP_USER_AGENT'], 'AppleWebKit') !== false; |
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| 158 | return $this->_browsers['is_webkit']; |
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| 159 | } |
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| 160 | |||
| 161 | /** |
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| 162 | * Determine if the browser is Firefox or one of its variants |
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| 163 | * @return boolean Whether or not this is Firefox (or one of its variants) |
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| 164 | */ |
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| 165 | function isFirefox() |
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| 166 | { |
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| 167 | if (!isset($this->_browsers['is_firefox'])) |
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| 168 | $this->_browsers['is_firefox'] = preg_match('~(?:Firefox|Ice[wW]easel|IceCat|Shiretoko|Minefield)/~', $_SERVER['HTTP_USER_AGENT']) === 1 && $this->isGecko(); |
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| 169 | return $this->_browsers['is_firefox']; |
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| 170 | } |
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| 171 | |||
| 172 | /** |
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| 173 | * Determine if the browser is WebTv or not |
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| 174 | * @return boolean Whether or not this is WebTV |
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| 175 | */ |
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| 176 | function isWebTv() |
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| 177 | { |
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| 178 | if (!isset($this->_browsers['is_web_tv'])) |
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| 179 | $this->_browsers['is_web_tv'] = strpos($_SERVER['HTTP_USER_AGENT'], 'WebTV') !== false; |
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| 180 | return $this->_browsers['is_web_tv']; |
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| 181 | } |
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| 182 | |||
| 183 | /** |
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| 184 | * Determine if the browser is konqueror or not |
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| 185 | * @return boolean Whether or not this is Konqueror |
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| 186 | */ |
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| 187 | function isKonqueror() |
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| 188 | { |
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| 189 | if (!isset($this->_browsers['is_konqueror'])) |
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| 190 | $this->_browsers['is_konqueror'] = strpos($_SERVER['HTTP_USER_AGENT'], 'Konqueror') !== false; |
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| 191 | return $this->_browsers['is_konqueror']; |
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| 192 | } |
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| 193 | |||
| 194 | /** |
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| 195 | * Determine if the browser is Gecko or not |
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| 196 | * @return boolean Whether or not this is a Gecko-based browser |
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| 197 | */ |
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| 198 | function isGecko() |
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| 199 | { |
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| 200 | if (!isset($this->_browsers['is_gecko'])) |
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| 201 | $this->_browsers['is_gecko'] = strpos($_SERVER['HTTP_USER_AGENT'], 'Gecko') !== false && !$this->isWebkit() && !$this->isKonqueror(); |
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| 202 | return $this->_browsers['is_gecko']; |
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| 203 | } |
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| 204 | |||
| 205 | /** |
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| 206 | * Determine if the browser is Opera Mini or not |
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| 207 | * @return boolean Whether or not this is Opera Mini |
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| 208 | */ |
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| 209 | function isOperaMini() |
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| 210 | { |
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| 211 | if (!isset($this->_browsers['is_opera_mini'])) |
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| 212 | $this->_browsers['is_opera_mini'] = (isset($_SERVER['HTTP_X_OPERAMINI_PHONE_UA']) || stripos($_SERVER['HTTP_USER_AGENT'], 'opera mini') !== false); |
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| 213 | if ($this->_browsers['is_opera_mini']) |
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| 214 | $this->_is_mobile = true; |
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| 215 | return $this->_browsers['is_opera_mini']; |
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| 216 | } |
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| 217 | |||
| 218 | /** |
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| 219 | * Determine if the browser is Opera Mobile or not |
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| 220 | * @return boolean Whether or not this is Opera Mobile |
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| 221 | */ |
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| 222 | function isOperaMobi() |
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| 223 | { |
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| 224 | if (!isset($this->_browsers['is_opera_mobi'])) |
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| 225 | $this->_browsers['is_opera_mobi'] = stripos($_SERVER['HTTP_USER_AGENT'], 'opera mobi') !== false; |
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| 226 | if ($this->_browsers['is_opera_mobi']) |
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| 227 | $this->_is_mobile = true; |
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| 228 | return $this->_browsers['is_opera_mini']; |
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| 229 | } |
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| 230 | |||
| 231 | /** |
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| 232 | * Detect Safari / Chrome / iP[ao]d / iPhone / Android / Blackberry from webkit. |
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| 233 | * - set the browser version for Safari and Chrome |
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| 234 | * - set the mobile flag for mobile based useragents |
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| 235 | */ |
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| 236 | private function setupWebkit() |
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| 237 | { |
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| 238 | $this->_browsers += array( |
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| 239 | 'is_chrome' => strpos($_SERVER['HTTP_USER_AGENT'], 'Chrome') !== false, |
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| 240 | 'is_iphone' => (strpos($_SERVER['HTTP_USER_AGENT'], 'iPhone') !== false || strpos($_SERVER['HTTP_USER_AGENT'], 'iPod') !== false) && strpos($_SERVER['HTTP_USER_AGENT'], 'iPad') === false, |
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| 241 | 'is_blackberry' => stripos($_SERVER['HTTP_USER_AGENT'], 'BlackBerry') !== false || strpos($_SERVER['HTTP_USER_AGENT'], 'PlayBook') !== false, |
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| 242 | 'is_android' => strpos($_SERVER['HTTP_USER_AGENT'], 'Android') !== false, |
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| 243 | 'is_nokia' => strpos($_SERVER['HTTP_USER_AGENT'], 'SymbianOS') !== false, |
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| 244 | ); |
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| 245 | |||
| 246 | // blackberry, playbook, iphone, nokia, android and ipods set a mobile flag |
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| 247 | if ($this->_browsers['is_iphone'] || $this->_browsers['is_blackberry'] || $this->_browsers['is_android'] || $this->_browsers['is_nokia']) |
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| 248 | $this->_is_mobile = true; |
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| 249 | |||
| 250 | // @todo what to do with the blaPad? ... for now leave it detected as Safari ... |
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| 251 | $this->_browsers['is_safari'] = strpos($_SERVER['HTTP_USER_AGENT'], 'Safari') !== false && !$this->_browsers['is_chrome'] && !$this->_browsers['is_iphone']; |
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| 252 | $this->_browsers['is_ipad'] = strpos($_SERVER['HTTP_USER_AGENT'], 'iPad') !== false; |
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| 253 | |||
| 254 | // if Chrome, get the major version |
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| 255 | if ($this->_browsers['is_chrome']) |
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| 256 | { |
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| 257 | if (preg_match('~chrome[/]([0-9][0-9]?[.])~i', $_SERVER['HTTP_USER_AGENT'], $match) === 1) |
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| 258 | $this->_browsers['is_chrome' . (int) $match[1]] = true; |
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| 259 | } |
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| 260 | |||
| 261 | // or if Safari get its major version |
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| 262 | if ($this->_browsers['is_safari']) |
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| 263 | { |
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| 264 | if (preg_match('~version/?(.*)safari.*~i', $_SERVER['HTTP_USER_AGENT'], $match) === 1) |
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| 265 | $this->_browsers['is_safari' . (int) trim($match[1])] = true; |
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| 266 | } |
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| 267 | } |
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| 268 | |||
| 269 | /** |
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| 270 | * Additional IE checks and settings. |
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| 271 | * - determines the version of the IE browser in use |
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| 272 | * - detects ie4 onward |
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| 273 | * - attempts to distinguish between IE and IE in compatibility view |
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| 274 | * - checks for old IE on macs as well, since we can |
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| 275 | */ |
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| 276 | private function setupIe() |
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| 277 | { |
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| 278 | $this->_browsers['is_ie_compat_view'] = false; |
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| 279 | |||
| 280 | // get the version of the browser from the msie tag |
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| 281 | if (preg_match('~MSIE\s?([0-9][0-9]?.[0-9])~i', $_SERVER['HTTP_USER_AGENT'], $msie_match) === 1) |
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| 282 | { |
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| 283 | $msie_match[1] = trim($msie_match[1]); |
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| 284 | $msie_match[1] = (($msie_match[1] - (int) $msie_match[1]) == 0) ? (int) $msie_match[1] : $msie_match[1]; |
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| 285 | $this->_browsers['is_ie' . $msie_match[1]] = true; |
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| 286 | } |
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| 287 | |||
| 288 | // "modern" ie uses trident 4=ie8, 5=ie9, 6=ie10, 7=ie11 even in compatibility view |
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| 289 | if (preg_match('~Trident/([0-9.])~i', $_SERVER['HTTP_USER_AGENT'], $trident_match) === 1) |
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| 290 | { |
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| 291 | $this->_browsers['is_ie' . ((int) $trident_match[1] + 4)] = true; |
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| 292 | |||
| 293 | // If trident is set, see the (if any) msie tag in the user agent matches ... if not its in some compatibility view |
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| 294 | if (isset($msie_match[1]) && ($msie_match[1] < $trident_match[1] + 4)) |
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| 295 | $this->_browsers['is_ie_compat_view'] = true; |
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| 296 | } |
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| 297 | |||
| 298 | // Detect true IE6 and IE7 and not IE in compat mode. |
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| 299 | $this->_browsers['is_ie7'] = !empty($this->_browsers['is_ie7']) && ($this->_browsers['is_ie_compat_view'] === false); |
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| 300 | $this->_browsers['is_ie6'] = !empty($this->_browsers['is_ie6']) && ($this->_browsers['is_ie_compat_view'] === false); |
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| 301 | |||
| 302 | // IE mobile 7 or 9, ... shucks why not |
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| 303 | if ((!empty($this->_browsers['is_ie7']) && strpos($_SERVER['HTTP_USER_AGENT'], 'IEMobile/7') !== false) || (!empty($this->_browsers['is_ie9']) && strpos($_SERVER['HTTP_USER_AGENT'], 'IEMobile/9') !== false)) |
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| 304 | { |
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| 305 | $this->_browsers['is_ie_mobi'] = true; |
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| 306 | $this->_is_mobile = true; |
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| 307 | } |
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| 308 | |||
| 309 | // And some throwbacks to a bygone era, deposited here like cholesterol in your arteries |
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| 310 | $this->_browsers += array( |
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| 311 | 'is_ie4' => !empty($this->_browsers['is_ie4']) && !$this->_browsers['is_web_tv'], |
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| 312 | 'is_mac_ie' => strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE 5.') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mac') !== false |
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| 313 | ); |
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| 314 | |||
| 315 | // Before IE8 we need to fix IE... lots! |
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| 316 | $this->_browsers['ie_standards_fix'] = (($this->_browsers['is_ie6'] === true) || ($this->_browsers['is_ie7'] === true)) ? true : false; |
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| 317 | |||
| 318 | // We may even need a size fix... |
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| 319 | $this->_browsers['needs_size_fix'] = (!empty($this->_browsers['is_ie5']) || !empty($this->_browsers['is_ie5.5']) || !empty($this->_browsers['is_ie4'])) && !$this->_browsers['is_mac_ie']; |
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| 320 | } |
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| 321 | |||
| 322 | /** |
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| 323 | * Additional firefox checks. |
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| 324 | * - Gets the version of the FF browser in use |
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| 325 | * - Considers all FF variants as FF including IceWeasel, IceCat, Shiretoko and Minefiled |
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| 326 | */ |
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| 327 | private function setupFirefox() |
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| 331 | } |
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| 332 | |||
| 333 | /** |
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| 334 | * More Opera checks if we are opera. |
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| 335 | * - checks for the version of Opera in use |
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| 336 | * - uses checks for 10 first and falls through to <9 |
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| 337 | */ |
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| 338 | private function setupOpera() |
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| 349 | } |
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| 350 | |||
| 351 | /** |
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| 352 | * Sets the version number for MS edge. |
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| 353 | */ |
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| 354 | private function setupEdge() |
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| 355 | { |
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| 356 | if (preg_match('~Edge[\/]([0-9][0-9]?[\.][0-9][0-9])~i', $_SERVER['HTTP_USER_AGENT'], $match) === 1) |
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| 357 | $this->_browsers['is_edge' . (int) $match[1]] = true; |
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| 358 | } |
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| 359 | |||
| 360 | /** |
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| 361 | * Get the browser name that we will use in the <body id="this_browser"> |
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| 362 | * - The order of each browser in $browser_priority is important |
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| 363 | * - if you want to have id='ie6' and not id='ie' then it must appear first in the list of ie browsers |
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| 364 | * - only sets browsers that may need some help via css for compatibility |
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| 365 | */ |
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| 366 | private function setupBrowserPriority() |
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| 367 | { |
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| 368 | global $context; |
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| 369 | |||
| 370 | if ($this->_is_mobile) |
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| 371 | $context['browser_body_id'] = 'mobile'; |
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| 372 | else |
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| 373 | { |
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| 374 | // add in any specific detection conversions here if you want a special body id e.g. 'is_opera9' => 'opera9' |
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| 375 | $browser_priority = array( |
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| 376 | 'is_ie6' => 'ie6', |
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| 377 | 'is_ie7' => 'ie7', |
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| 378 | 'is_ie8' => 'ie8', |
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| 379 | 'is_ie9' => 'ie9', |
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| 380 | 'is_ie10' => 'ie10', |
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| 381 | 'is_ie11' => 'ie11', |
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| 382 | 'is_ie' => 'ie', |
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| 383 | 'is_edge' => 'edge', |
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| 384 | 'is_firefox' => 'firefox', |
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| 385 | 'is_chrome' => 'chrome', |
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| 386 | 'is_safari' => 'safari', |
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| 387 | 'is_opera10' => 'opera10', |
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| 388 | 'is_opera11' => 'opera11', |
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| 389 | 'is_opera12' => 'opera12', |
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| 390 | 'is_opera' => 'opera', |
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| 391 | 'is_konqueror' => 'konqueror', |
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| 392 | ); |
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| 393 | |||
| 394 | $context['browser_body_id'] = 'smf'; |
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| 395 | $active = array_reverse(array_keys($this->_browsers, true)); |
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| 396 | foreach ($active as $browser) |
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| 397 | { |
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| 398 | if (array_key_exists($browser, $browser_priority)) |
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| 399 | { |
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| 400 | $context['browser_body_id'] = $browser_priority[$browser]; |
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| 401 | break; |
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| 402 | } |
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| 403 | } |
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| 404 | } |
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| 405 | } |
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| 406 | |||
| 407 | /** |
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| 408 | * Fill out the historical array |
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| 409 | * - needed to support old mods that don't use isBrowser |
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| 410 | */ |
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| 411 | function fillInformation() |
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| 444 | ); |
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| 445 | } |
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| 446 | } |
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| 447 | |||
| 448 | ?> |
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Adding explicit visibility (
private,protected, orpublic) is generally recommend to communicate to other developers how, and from where this method is intended to be used.