Chris@0: <?php
Chris@0: 
Chris@0: namespace PhpParser\Node;
Chris@0: 
Chris@0: use PhpParser\NodeAbstract;
Chris@0: 
Chris@0: class Name extends NodeAbstract
Chris@0: {
Chris@0:     /**
Chris@0:      * @var string[] Parts of the name
Chris@0:      */
Chris@0:     public $parts;
Chris@0: 
Chris@0:     /**
Chris@0:      * Constructs a name node.
Chris@0:      *
Chris@0:      * @param string|array|self $name       Name as string, part array or Name instance (copy ctor)
Chris@0:      * @param array             $attributes Additional attributes
Chris@0:      */
Chris@0:     public function __construct($name, array $attributes = array()) {
Chris@0:         parent::__construct($attributes);
Chris@0:         $this->parts = self::prepareName($name);
Chris@0:     }
Chris@0: 
Chris@0:     public function getSubNodeNames() {
Chris@0:         return array('parts');
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Gets the first part of the name, i.e. everything before the first namespace separator.
Chris@0:      *
Chris@0:      * @return string First part of the name
Chris@0:      */
Chris@0:     public function getFirst() {
Chris@0:         return $this->parts[0];
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Gets the last part of the name, i.e. everything after the last namespace separator.
Chris@0:      *
Chris@0:      * @return string Last part of the name
Chris@0:      */
Chris@0:     public function getLast() {
Chris@0:         return $this->parts[count($this->parts) - 1];
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Checks whether the name is unqualified. (E.g. Name)
Chris@0:      *
Chris@0:      * @return bool Whether the name is unqualified
Chris@0:      */
Chris@0:     public function isUnqualified() {
Chris@0:         return 1 == count($this->parts);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Checks whether the name is qualified. (E.g. Name\Name)
Chris@0:      *
Chris@0:      * @return bool Whether the name is qualified
Chris@0:      */
Chris@0:     public function isQualified() {
Chris@0:         return 1 < count($this->parts);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Checks whether the name is fully qualified. (E.g. \Name)
Chris@0:      *
Chris@0:      * @return bool Whether the name is fully qualified
Chris@0:      */
Chris@0:     public function isFullyQualified() {
Chris@0:         return false;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Checks whether the name is explicitly relative to the current namespace. (E.g. namespace\Name)
Chris@0:      *
Chris@0:      * @return bool Whether the name is relative
Chris@0:      */
Chris@0:     public function isRelative() {
Chris@0:         return false;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Returns a string representation of the name by imploding the namespace parts with the
Chris@0:      * namespace separator.
Chris@0:      *
Chris@0:      * @return string String representation
Chris@0:      */
Chris@0:     public function toString() {
Chris@0:         return implode('\\', $this->parts);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Returns a string representation of the name by imploding the namespace parts with the
Chris@0:      * namespace separator.
Chris@0:      *
Chris@0:      * @return string String representation
Chris@0:      */
Chris@0:     public function __toString() {
Chris@0:         return implode('\\', $this->parts);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Gets a slice of a name (similar to array_slice).
Chris@0:      *
Chris@0:      * This method returns a new instance of the same type as the original and with the same
Chris@0:      * attributes.
Chris@0:      *
Chris@0:      * If the slice is empty, null is returned. The null value will be correctly handled in
Chris@0:      * concatenations using concat().
Chris@0:      *
Chris@0:      * Offset and length have the same meaning as in array_slice().
Chris@0:      *
Chris@0:      * @param int      $offset Offset to start the slice at (may be negative)
Chris@0:      * @param int|null $length Length of the slice (may be negative)
Chris@0:      *
Chris@0:      * @return static|null Sliced name
Chris@0:      */
Chris@0:     public function slice($offset, $length = null) {
Chris@0:         $numParts = count($this->parts);
Chris@0: 
Chris@0:         $realOffset = $offset < 0 ? $offset + $numParts : $offset;
Chris@0:         if ($realOffset < 0 || $realOffset > $numParts) {
Chris@0:             throw new \OutOfBoundsException(sprintf('Offset %d is out of bounds', $offset));
Chris@0:         }
Chris@0: 
Chris@0:         if (null === $length) {
Chris@0:             $realLength = $numParts - $realOffset;
Chris@0:         } else {
Chris@0:             $realLength = $length < 0 ? $length + $numParts - $realOffset : $length;
Chris@0:             if ($realLength < 0 || $realLength > $numParts) {
Chris@0:                 throw new \OutOfBoundsException(sprintf('Length %d is out of bounds', $length));
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         if ($realLength === 0) {
Chris@0:             // Empty slice is represented as null
Chris@0:             return null;
Chris@0:         }
Chris@0: 
Chris@0:         return new static(array_slice($this->parts, $realOffset, $realLength), $this->attributes);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Concatenate two names, yielding a new Name instance.
Chris@0:      *
Chris@0:      * The type of the generated instance depends on which class this method is called on, for
Chris@0:      * example Name\FullyQualified::concat() will yield a Name\FullyQualified instance.
Chris@0:      *
Chris@0:      * If one of the arguments is null, a new instance of the other name will be returned. If both
Chris@0:      * arguments are null, null will be returned. As such, writing
Chris@0:      *     Name::concat($namespace, $shortName)
Chris@0:      * where $namespace is a Name node or null will work as expected.
Chris@0:      *
Chris@0:      * @param string|array|self|null $name1      The first name
Chris@0:      * @param string|array|self|null $name2      The second name
Chris@0:      * @param array                  $attributes Attributes to assign to concatenated name
Chris@0:      *
Chris@0:      * @return static|null Concatenated name
Chris@0:      */
Chris@0:     public static function concat($name1, $name2, array $attributes = []) {
Chris@0:         if (null === $name1 && null === $name2) {
Chris@0:             return null;
Chris@0:         } elseif (null === $name1) {
Chris@0:             return new static(self::prepareName($name2), $attributes);
Chris@0:         } else if (null === $name2) {
Chris@0:             return new static(self::prepareName($name1), $attributes);
Chris@0:         } else {
Chris@0:             return new static(
Chris@0:                 array_merge(self::prepareName($name1), self::prepareName($name2)), $attributes
Chris@0:             );
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Prepares a (string, array or Name node) name for use in name changing methods by converting
Chris@0:      * it to an array.
Chris@0:      *
Chris@0:      * @param string|array|self $name Name to prepare
Chris@0:      *
Chris@0:      * @return array Prepared name
Chris@0:      */
Chris@0:     private static function prepareName($name) {
Chris@0:         if (\is_string($name)) {
Chris@0:             return explode('\\', $name);
Chris@0:         } elseif (\is_array($name)) {
Chris@0:             return $name;
Chris@0:         } elseif ($name instanceof self) {
Chris@0:             return $name->parts;
Chris@0:         }
Chris@0: 
Chris@0:         throw new \InvalidArgumentException(
Chris@0:             'Expected string, array of parts or Name instance'
Chris@0:         );
Chris@0:     }
Chris@0: }