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<?php |
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|
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if (!defined('ABSPATH')) { |
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exit; |
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} |
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|
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/** |
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* Read-only metadata queries against the database engine and WordPress content. |
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* |
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* Owns the three "ask the DB what it can do" reads previously inlined in |
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* ViewReadService: per-table engine name, MyISAM support flag, and the |
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* distinct post-type list from wp_posts. Extracted in the i805 ViewReadService |
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* decomposition so the staged view-read service stays focused on its |
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* pipeline. |
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*/ |
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class ABJ_404_Solution_DatabaseMetadataReader { |
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|
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/** @var ABJ_404_Solution_DatabaseCore */ |
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private $dbCore; |
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|
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/** |
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* @param ABJ_404_Solution_DatabaseCore $dbCore |
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*/ |
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public function __construct(ABJ_404_Solution_DatabaseCore $dbCore) { |
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$this->dbCore = $dbCore; |
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} |
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|
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/** |
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* Run the canned selectTableEngines.sql query and return the raw |
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* queryAndGetResults envelope (rows + last_error + timed_out). |
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* |
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* @return array<string, mixed> |
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*/ |
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public function getTableEngines(): array { |
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$query = ABJ_404_Solution_FileSystemService::readFileContents(__DIR__ . "/../sql/selectTableEngines.sql"); |
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return $this->dbCore->queryAndGetResults($query); |
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} |
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|
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/** |
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* @return bool True if information_schema.ENGINES reports SUPPORT=YES for MyISAM. |
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*/ |
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public function isMyISAMSupported(): bool { |
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$supportResults = $this->dbCore->queryAndGetResults( |
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"SELECT ENGINE, SUPPORT FROM information_schema.ENGINES WHERE lower(ENGINE) = 'myisam'", |
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array('log_errors' => false) |
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); |
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|
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if (!empty($supportResults) && !empty($supportResults['rows']) && is_array($supportResults['rows'])) { |
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$rows = $supportResults['rows']; |
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$row = is_array($rows[0] ?? null) ? $rows[0] : array(); |
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$supportValue = array_key_exists('support', $row) ? (string)($row['support'] ?? '') |
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: (array_key_exists('SUPPORT', $row) ? (string)($row['SUPPORT'] ?? '') : 'nope'); |
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return strtolower($supportValue) == 'yes'; |
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} |
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return false; |
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} |
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|
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/** |
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* @return array<int, string> Distinct post_type values from wp_posts in alphabetical order. |
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*/ |
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public function getAllPostTypes(): array { |
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// LIMIT 200 bounds the DISTINCT scan on wp_posts (design-audit-2026-06-06 M502 / i309). |
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// CPT-heavy ecommerce/learning installs can hold tens of millions of rows; without a |
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// LIMIT the admin advanced-settings render forces a full-table read to compute the |
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// distinct set. WordPress sites with over 200 distinct post types are pathological, so |
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// 200 is well above any legitimate count and keeps the read cheap on large installs. |
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$query = "SELECT DISTINCT post_type FROM {wp_posts} order by post_type LIMIT 200"; |
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$results = $this->dbCore->queryAndGetResults($query); |
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$rows = $results['rows']; |
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|
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$postType = array(); |
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if (is_array($rows)) { |
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foreach ($rows as $row) { |
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array_push($postType, $row['post_type']); |
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} |
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} |
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return $postType; |
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} |
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} |
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|
