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<?php declare(strict_types=1); |
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namespace html_go\indexing; |
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use InvalidArgumentException; |
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use html_go\exceptions\InternalException; |
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final class IndexManager extends AbstractIndexer |
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{ |
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/** @var array<string, \stdClass> $catIndex */ |
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private array $catIndex; |
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/** @var array<string, \stdClass> $pageIndex */ |
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private array $pageIndex; |
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/** @var array<string, \stdClass> $postIndex */ |
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private array $postIndex; |
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/** @var array<mixed> $menuIndex */ |
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private array $menuIndex; |
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/** |
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* A tag is NOT represented by any file on the physical filessytem. |
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* @var array<string, \stdClass> $tagIndex |
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*/ |
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private array $tagIndex; |
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/** |
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* The slug index holds references to files on the physical filesystem., |
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* and is a combination of the catIndex, postIndex and pageIndex |
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* |
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* The key is the uri, the value is the associated content object. |
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* |
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* @var array<string, \stdClass> $slugIndex |
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*/ |
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private array $slugIndex; |
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/** @var array<string, array> $tag2postIndex */ |
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private array $tag2postIndex; |
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/** @var array<string, array> $cat2postIndex */ |
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private array $cat2postIndex; |
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/** |
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* IndexManager constructor. |
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* @param string $parentDir The parent directory for the content directory. |
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* @throws \InvalidArgumentException If the parent directory is invalid. |
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* @throws InternalException |
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*/ |
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public function __construct(string $parentDir) { |
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parent::__construct($parentDir); |
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$this->initialize(); |
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} |
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/** |
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* Rebuild all the indexes. |
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*/ |
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public function reindex(): void { |
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$this->catIndex = $this->buildCategoryIndex(); |
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$pageMenuIndex = $this->buildPageAndMenuIndexes(); |
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$this->pageIndex = $pageMenuIndex[0]; |
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$this->menuIndex = $pageMenuIndex[1]; |
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$this->postIndex = $this->buildPostIndex(); |
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$compositeIndex = $this->buildCompositeIndexes(); |
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$this->tagIndex = $compositeIndex[0]; |
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$this->tag2postIndex = $compositeIndex[1]; |
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$this->cat2postIndex = $compositeIndex[2]; |
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$this->slugIndex = \array_merge($this->postIndex, $this->catIndex, $this->pageIndex, $this->tagIndex); |
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} |
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/** |
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* Returns an object representing an element in the index. |
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* @param string $key |
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* @throws \InvalidArgumentException If the given $key does not exist in the index. |
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* @return \stdClass |
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*/ |
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public function getElementFromSlugIndex(string $key): \stdClass { |
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if (!isset($this->slugIndex[$key])) { |
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throw new InvalidArgumentException("Key does not exist in the slugIndex! Use 'elementExists()' before calling this method."); |
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} |
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return $this->slugIndex[$key]; |
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} |
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/** |
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* Check if an key exists in the <b>slug index</b>. |
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* @param string $key |
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* @return bool <code>true</code> if exists, otherwise <code>false</code> |
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*/ |
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public function elementExists(string $key): bool { |
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return isset($this->slugIndex[$key]); |
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} |
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/** |
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* Return the posts index. |
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* @return array<string, \stdClass> |
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*/ |
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public function getPostsIndex(): array { |
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return $this->postIndex; |
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} |
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/** |
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* Return the category index. |
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* @return array<string, \stdClass> |
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*/ |
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public function getCategoriesIndex(): array { |
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return $this->catIndex; |
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} |
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/** |
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* Return the tag index. |
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* @return array<string, \stdClass> |
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*/ |
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public function getTagIndex(): array { |
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return $this->tagIndex; |
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} |
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/** |
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* Return the menus index. |
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* @return array<mixed> |
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*/ |
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public function getMenusIndex(): array { |
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return $this->menuIndex; |
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} |
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/** |
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* Return the tag index. |
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* @return array<string, \stdClass> |
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*/ |
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public function getPageIndex(): array { |
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return $this->pageIndex; |
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} |
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/** |
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* Return the posts for category index. |
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* @return array<string, array> |
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*/ |
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public function getPostsForCategoryIndex(): array { |
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return $this->cat2postIndex; |
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} |
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/** |
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* Return the posts for tag index. |
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* @return array<string, array> |
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*/ |
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public function getPostsForTagIndex(): array { |
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return $this->tag2postIndex; |
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} |
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private function initialize(): void { |
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if ((\is_dir($this->parentDir.DS.'cache'.DS.'indexes')) === false) { |
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$dir = $this->parentDir.DS.'cache'.DS.'indexes'; |
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if (\mkdir($dir, MODE, true) === false) { |
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throw new InternalException("Unable to create cache/indexes directory [$dir]"); // @codeCoverageIgnore |
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} |
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$this->reindex(); |
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} else { |
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$this->catIndex = $this->loadIndex($this->catInxFile); |
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$this->pageIndex = $this->loadIndex($this->pageInxFile); |
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$this->postIndex = $this->loadIndex($this->postInxFile); |
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$this->tagIndex = $this->loadIndex($this->tagInxFile); |
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$this->cat2postIndex = $this->loadIndex($this->cat2postInxFile); |
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$this->tag2postIndex = $this->loadIndex($this->tag2postInxFile); |
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$this->menuIndex = $this->loadIndex($this->menuInxFile); |
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$this->slugIndex = \array_merge($this->postIndex, $this->catIndex, $this->pageIndex, $this->tagIndex); |
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} |
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} |
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/** |
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* @return array<string, \stdClass> |
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*/ |
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private function buildCategoryIndex(): array { |
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$index = []; |
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foreach ($this->parseDirectory($this->commonDir.DS.CATEGORY_SECTION.DS.'*'.CONTENT_FILE_EXT) as $filepath) { |
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$root = \substr($filepath, \strlen($this->commonDir) + 1); |
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$key = \str_replace(DS, FWD_SLASH, \substr($root, 0, \strlen($root) - CONTENT_FILE_EXT_LEN)); |
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if (CATEGORY_SECTION.FWD_SLASH.'index' === $key) { |
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continue; // 'index.json' file is the landing page |
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} |
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$index[$key] = $this->createElement($key, $filepath, CATEGORY_SECTION); |
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} |
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$this->writeIndex($this->catInxFile, $index); |
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return $index; |
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} |
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/** |
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* Builds two indexes: menu and post indexes. |
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* @return array<mixed> |
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*/ |
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private function buildPageAndMenuIndexes(): array { |
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$pageDir = $this->commonDir.DS.PAGE_SECTION; |
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$len = \strlen($pageDir) + 1; |
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$pages = $this->scanDirectory($pageDir); |
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\sort($pages); |
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$menuInx = []; |
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$pageInx = []; |
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foreach ($pages as $filepath) { |
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$location = \substr($filepath, $len); |
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$key = \str_replace(DS, FWD_SLASH, \substr($location, 0, (\strlen($location) - CONTENT_FILE_EXT_LEN))); |
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if (\str_ends_with($key, '/index')) { |
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$key = substr($key, 0, \strlen($key) - 6); |
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} else { |
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if ($key === 'index') { |
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$key = FWD_SLASH; |
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} |
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} |
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$pageInx[$key] = $this->createElement($key, $filepath, PAGE_SECTION); |
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$menuInx = $this->mergeToMenuIndex($menuInx, $this->buildMenus($key, $filepath)); |
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} |
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// Add Tag landing page |
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$filepath = $this->commonDir.DS.TAG_SECTION.DS.'index'.CONTENT_FILE_EXT; |
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$pageInx[TAG_INDEX_KEY] = $this->createElement(TAG_SECTION, $filepath, TAG_SECTION); |
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$menuInx = $this->mergeToMenuIndex($menuInx, $this->buildMenus(TAG_SECTION, $filepath)); |
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// Add Category landing page |
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$filepath = $this->commonDir.DS.CATEGORY_SECTION.DS.'index'.CONTENT_FILE_EXT; |
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$pageInx[CAT_INDEX_KEY] = $this->createElement(CATEGORY_SECTION, $filepath, CATEGORY_SECTION); |
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$menuInx = $this->mergeToMenuIndex($menuInx, $this->buildMenus(CATEGORY_SECTION, $filepath)); |
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// Add Blog (posts) landing page |
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$filepath = $this->commonDir.DS.POST_SECTION.DS.'index'.CONTENT_FILE_EXT; |
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$pageInx[POST_INDEX_KEY] = $this->createElementClass(POST_INDEX_KEY, $filepath, POST_SECTION); |
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$menuInx = $this->mergeToMenuIndex($menuInx, $this->buildMenus(POST_INDEX_KEY, $filepath)); |
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$this->writeIndex($this->pageInxFile, $pageInx); |
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$menuInx = $this->orderMenuEntries($menuInx); |
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$this->writeIndex($this->menuInxFile, $menuInx); |
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return [$pageInx, $menuInx]; |
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} |
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/** |
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* Builds the post index. |
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* @return array<string, \stdClass> |
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*/ |
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private function buildPostIndex(): array { |
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$index = []; |
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foreach ($this->parseDirectory($this->userDataDir.DS.'*'.DS.POST_SECTION.DS.'*'.DS.'*'.DS.'*'.CONTENT_FILE_EXT) as $filepath) { |
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$key = \pathinfo($filepath, PATHINFO_FILENAME); |
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$element = $this->createElement(/** @scrutinizer ignore-type */ $key, $filepath, POST_SECTION); |
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$index[(string)$element->key] = $element; |
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} |
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$this->writeIndex($this->postInxFile, $index); |
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return $index; |
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} |
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/** |
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* Reads the given file and creates an array of menus in which this |
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* resource is listed. |
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* @return array<mixed> |
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*/ |
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private function buildMenus(string $key, string $filepath): array { |
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if (empty($key)) { |
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throw new \InvalidArgumentException("Key is empty for [$filepath]"); // @codeCoverageIgnore |
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} |
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if (($json = \file_get_contents($filepath)) === false) { |
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throw new InternalException("file_get_contents() failed reading [$filepath]"); // @codeCoverageIgnore |
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} |
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$data = \json_decode($json, true); |
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$menus = []; |
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if (isset($data['menus'])) { |
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foreach ($data['menus'] as $name => $defs) { |
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$node = new \stdClass(); |
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$node->key = $key; |
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foreach ($defs as $label => $value) { |
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$node->$label = $value; |
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} |
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$menus[$name][$node->key] = $node; |
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} |
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} |
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return $menus; |
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} |
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/** |
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* Does a <code>usort</code> on the <code>weight</code> property. |
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* @param array<mixed> $index the unsorted array |
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* @return array<mixed> the sorted array |
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*/ |
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private function orderMenuEntries(array $index): array { |
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foreach ($index as $name => $defs) { |
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\usort($defs, function($a, $b): int { |
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if ($a->weight === $b->weight) { |
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return 0; |
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} |
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return $a->weight > $b->weight ? 1 : -1; |
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}); |
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$index[$name] = $defs; |
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} |
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return $index; |
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} |
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/** |
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* Builds three indexes: 'category 2 posts', 'tag 2 posts' and tag index. |
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* @throws InternalException |
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* @return array<mixed> |
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*/ |
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private function buildCompositeIndexes(): array { |
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$tagInx = []; |
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$tag2PostsIndex = []; |
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$cat2PostIndex = []; |
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foreach ($this->postIndex as $post) { |
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if (!isset($post->key, $post->tags, $post->category)) { |
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throw new InternalException("Invalid format of index element: "./** @scrutinizer ignore-type */print_r($post, true)); // @codeCoverageIgnore |
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} |
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foreach ($post->tags as $tag) { |
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304
|
|
|
$key = TAG_SECTION.FWD_SLASH.(string)$tag; |
|
305
|
|
|
$tagInx[$key] = $this->createElementClass($key, EMPTY_VALUE, TAG_SECTION); |
|
306
|
|
|
$tag2PostsIndex[$key][] = $post->key; |
|
307
|
|
|
} |
|
308
|
|
|
$cat2PostIndex[$post->category][] = $post->key; |
|
309
|
|
|
} |
|
310
|
|
|
$this->writeIndex($this->tagInxFile, $tagInx); |
|
311
|
|
|
$this->writeIndex($this->tag2postInxFile, $tag2PostsIndex); |
|
312
|
|
|
$this->writeIndex($this->cat2postInxFile, $cat2PostIndex); |
|
313
|
|
|
return [$tagInx, $tag2PostsIndex, $cat2PostIndex]; |
|
314
|
|
|
} |
|
315
|
|
|
|
|
316
|
|
|
/** |
|
317
|
|
|
* Merge the given menu array into the master menu index returning the new |
|
318
|
|
|
* master menu index. |
|
319
|
|
|
* @param array<mixed> $initial |
|
320
|
|
|
* @param array<mixed> $toMerge The menu array to be merged. |
|
321
|
|
|
* @return array<mixed> |
|
322
|
|
|
*/ |
|
323
|
|
|
private function mergeToMenuIndex(array $initial, array $toMerge): array { |
|
324
|
|
|
foreach ($toMerge as $name => $def) { |
|
325
|
|
|
if (isset($initial[$name])) { |
|
326
|
|
|
$nodes = $initial[$name]; |
|
327
|
|
|
$initial[$name] = \array_merge($nodes, $def); |
|
328
|
|
|
} else { |
|
329
|
|
|
$initial[$name] = $def; |
|
330
|
|
|
} |
|
331
|
|
|
} |
|
332
|
|
|
return $initial; |
|
333
|
|
|
} |
|
334
|
|
|
} |
|
335
|
|
|
|