name = $name; $this->array = array(); $this->parent = $parent; } /** * @param DOMNode $root * @param ?BookCollection $parent * @param bool $isRoot * @return BookCollection * @throws Exception */ public static function parse (DOMNode $root, ?BookCollection $parent, bool $isRoot = false): BookCollection { $name = BookCollection::ROOT; if (!$isRoot) { if ($root->hasAttributes()) { $attrName = $root->attributes->getNamedItem("name"); if ($attrName == null) throw new Exception("BookCollection (not root) xml data missing attribute \"name\""); else $name = $attrName->nodeValue; } else throw new Exception("BookCollection (not root) xml data missing attributes"); } $node = new BookCollection($name, $parent); for ($child = $root->firstChild; $child != null; $child = $child->nextSibling) { switch ($child->nodeName) { case "Book": array_push($node->array, Book::parse($child, $node)); break; case "Collection": array_push($node->array, BookCollection::parse($child, $node)); break; case "#text": break; default: throw new Exception("Unsupported element type \"$child->nodeName\" in BookCollection named \"$name\""); } } return $node; } public function getName (): string { return $this->name; } /** * @return Book[]|BookCollection[] */ public function getCollection (): array { return $this->array; } /** * @return BookCollection|null */ public function getParent (): BookCollection { return $this->parent; } public function getHtml (): string { $str = ""; if ($this->name != self::ROOT) $str .= "

$this->name

"; foreach ($this->array as $node) { $str .= $node->getHtml(); } if ($this->name != self::ROOT) $str .= "

"; return $str; } public function getBook (string $id): ?Book { foreach ($this->array as $node) { if ($node instanceof Book && $node->getId() == $id) return $node; else if ($node instanceof BookCollection) { $got = $node->getBook($id); if ($got != null) return $got; } } return null; } }