SilverStripe\Core\ClassInfo::parse_class_spec()

Complexity

Conditions	32
Paths	166

Size

Total Lines	135
Code Lines	90

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
    public static function parse_class_spec($classSpec)
    {
        if (isset(static::$_cache_parse[$classSpec])) {

Since $_cache_parse is declared private, accessing it with static will lead to errors in possible sub-classes; consider using self, or increasing the visibility of $_cache_parse to at least protected.

            return static::$_cache_parse[$classSpec];

Since $_cache_parse is declared private, accessing it with static will lead to errors in possible sub-classes; consider using self, or increasing the visibility of $_cache_parse to at least protected.

        }

        $tokens = token_get_all("<?php $classSpec");
        $class = null;
        $args = array();

        // Keep track of the current bucket that we're putting data into
        $bucket = &$args;
        $bucketStack = array();
        $hadNamespace = false;
        $currentKey = null;

        foreach ($tokens as $token) {
            // $forceResult used to allow null result to be detected
            $result = $forceResult = null;
            $tokenName = is_array($token) ? $token[0] : $token;

            // Get the class name
            if ($class === null && is_array($token) && $token[0] === T_STRING) {
                $class = $token[1];
            } elseif (is_array($token) && $token[0] === T_NS_SEPARATOR) {
                $class .= $token[1];
                $hadNamespace = true;
            } elseif ($hadNamespace && is_array($token) && $token[0] === T_STRING) {
                $class .= $token[1];
                $hadNamespace = false;
            // Get arguments
            } elseif (is_array($token)) {
                switch ($token[0]) {
                    case T_CONSTANT_ENCAPSED_STRING:
                        $argString = $token[1];
                        switch ($argString[0]) {
                            case '"':
                                $result = stripcslashes(substr($argString, 1, -1));
                                break;
                            case "'":
                                $result = str_replace(array("\\\\", "\\'"), array("\\", "'"), substr($argString, 1, -1));
                                break;
                            default:
                                throw new Exception("Bad T_CONSTANT_ENCAPSED_STRING arg $argString");
                        }

                        break;

                    case T_DNUMBER:
                        $result = (double)$token[1];
                        break;

                    case T_LNUMBER:
                        $result = (int)$token[1];
                        break;

                    case T_DOUBLE_ARROW:
                        // We've encountered an associative array (the array itself has already been
                        // added to the bucket), so the previous item added to the bucket is the key
                        end($bucket);
                        $currentKey = current($bucket);
                        array_pop($bucket);
                        break;

                    case T_STRING:
                        switch ($token[1]) {
                            case 'true':
                                $result = true;

                                break;
                            case 'false':
                                $result = false;

                                break;
                            case 'null':
                                $result = null;
                                $forceResult = true;

                                break;
                            default:
                                throw new Exception("Bad T_STRING arg '{$token[1]}'");
                        }

                        break;

                    case T_ARRAY:
                        $result = array();
                        break;
                }
            } else {
                if ($tokenName === '[') {
                    $result = array();
                } elseif (($tokenName === ')' || $tokenName === ']') && ! empty($bucketStack)) {
                    // Store the bucket we're currently working on
                    $oldBucket = $bucket;
                    // Fetch the key for the bucket at the top of the stack
                    end($bucketStack);
                    $key = key($bucketStack);
                    reset($bucketStack);
                    // Re-instate the bucket from the top of the stack
                    $bucket = &$bucketStack[$key];
                    // Add our saved, "nested" bucket to the bucket we just popped off the stack
                    $bucket[$key] = $oldBucket;
                    // Remove the bucket we just popped off the stack
                    array_pop($bucketStack);
                }
            }

            // If we've got something to add to the bucket, add it
            if ($result !== null || $forceResult) {
                if ($currentKey) {
                    $bucket[$currentKey] = $result;
                    $currentKey = null;
                } else {
                    $bucket[] = $result;
                }

                // If we've just pushed an array, that becomes our new bucket
                if ($result === array()) {
                    // Fetch the key that the array was pushed to
                    end($bucket);
                    $key = key($bucket);
                    reset($bucket);
                    // Store reference to "old" bucket in the stack
                    $bucketStack[$key] = &$bucket;
                    // Set the active bucket to be our newly-pushed, empty array
                    $bucket = &$bucket[$key];
                }
            }
        }

        $result = [$class, $args];
        static::$_cache_parse[$classSpec] = $result;

Since $_cache_parse is declared private, accessing it with static will lead to errors in possible sub-classes; consider using self, or increasing the visibility of $_cache_parse to at least protected.

        return $result;
    }
}