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parseImplementation()   F
last analyzed

Complexity

Conditions 46
Paths 139

Size

Total Lines 89

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
cc 46
nc 139
nop 3
dl 0
loc 89
rs 3.8416
c 0
b 0
f 0

How to fix   Long Method    Complexity   

Long Method

Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.

For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.

Commonly applied refactorings include:

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<?php
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/**
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 * Performs safe variable parsing based on types which can be used by
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 * users. This may not be able to represent all possible data inputs,
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 * however.
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 */
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class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser
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{
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    protected function parseImplementation($var, $type, $allow_null) {
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        if ($allow_null && $var === null) return null;
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        switch ($type) {
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            // Note: if code "breaks" from the switch, it triggers a generic
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            // exception to be thrown. Specific errors can be specifically
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            // done here.
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            case self::MIXED :
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            case self::ISTRING :
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            case self::STRING :
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            case self::TEXT :
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            case self::ITEXT :
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                return $var;
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            case self::INT :
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                if (is_string($var) && ctype_digit($var)) $var = (int) $var;
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                return $var;
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            case self::FLOAT :
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                if ((is_string($var) && is_numeric($var)) || is_int($var)) $var = (float) $var;
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                return $var;
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            case self::BOOL :
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                if (is_int($var) && ($var === 0 || $var === 1)) {
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                    $var = (bool) $var;
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                } elseif (is_string($var)) {
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                    if ($var == 'on' || $var == 'true' || $var == '1') {
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                        $var = true;
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                    } elseif ($var == 'off' || $var == 'false' || $var == '0') {
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                        $var = false;
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                    } else {
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                        throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type");
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                    }
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                }
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                return $var;
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            case self::ALIST :
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            case self::HASH :
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            case self::LOOKUP :
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                if (is_string($var)) {
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                    // special case: technically, this is an array with
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                    // a single empty string item, but having an empty
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                    // array is more intuitive
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                    if ($var == '') return array();
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                    if (strpos($var, "\n") === false && strpos($var, "\r") === false) {
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                        // simplistic string to array method that only works
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                        // for simple lists of tag names or alphanumeric characters
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                        $var = explode(',',$var);
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                    } else {
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                        $var = preg_split('/(,|[\n\r]+)/', $var);
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                    }
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                    // remove spaces
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                    foreach ($var as $i => $j) $var[$i] = trim($j);
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                    if ($type === self::HASH) {
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                        // key:value,key2:value2
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                        $nvar = array();
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                        foreach ($var as $keypair) {
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                            $c = explode(':', $keypair, 2);
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                            if (!isset($c[1])) continue;
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                            $nvar[trim($c[0])] = trim($c[1]);
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                        }
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                        $var = $nvar;
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                    }
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                }
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                if (!is_array($var)) break;
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                $keys = array_keys($var);
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                if ($keys === array_keys($keys)) {
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                    if ($type == self::ALIST) return $var;
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                    elseif ($type == self::LOOKUP) {
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                        $new = array();
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                        foreach ($var as $key) {
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                            $new[$key] = true;
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                        }
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                        return $new;
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                    } else break;
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                }
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                if ($type === self::ALIST) {
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                    trigger_error("Array list did not have consecutive integer indexes", E_USER_WARNING);
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                    return array_values($var);
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                }
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                if ($type === self::LOOKUP) {
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                    foreach ($var as $key => $value) {
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                        if ($value !== true) {
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                            trigger_error("Lookup array has non-true value at key '$key'; maybe your input array was not indexed numerically", E_USER_WARNING);
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                        }
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                        $var[$key] = true;
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                    }
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                }
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                return $var;
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            default:
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                $this->errorInconsistent(__CLASS__, $type);
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        }
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        $this->errorGeneric($var, $type);
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    }
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}
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// vim: et sw=4 sts=4
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