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<?php |
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// allow-no-test-found: covered by tests/UninstallDiagnosticsEntryPointTest.php public uninstall modal/email entry points |
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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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* Reads per-table metadata for uninstall diagnostics. Each table probe uses |
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* the production fallback chain: information_schema, SHOW TABLE STATUS, |
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* SHOW CREATE TABLE, then wpdb defaults. |
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*/ |
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class ABJ_404_Solution_UninstallDatabaseMetadataReader { |
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|
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/** |
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* @param string $tableName Table name to look up. |
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* @return array{charset?:string|null,collation?:string|null,engine?:string,error?:string,source?:string} |
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*/ |
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public function getTableInfo(string $tableName): array { |
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$result = $this->tryInformationSchema($tableName); |
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if ($result !== null && !isset($result['error'])) { |
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return $result; |
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} |
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|
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$result = $this->tryShowTableStatus($tableName); |
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if ($result !== null && !isset($result['error'])) { |
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return $result; |
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} |
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|
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$result = $this->tryShowCreateTable($tableName); |
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if ($result !== null && !isset($result['error'])) { |
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return $result; |
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} |
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|
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return $this->getWpdbDefaults(); |
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} |
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|
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/** |
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* @param string $tableName Table name to look up. |
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* @return array{charset?:string|null,collation?:string|null,engine?:string,error?:string}|null |
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*/ |
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public function tryInformationSchema(string $tableName) { |
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/** @var \wpdb $wpdb */ |
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global $wpdb; |
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|
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if (!method_exists($wpdb, 'get_row')) { |
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return array('error' => 'wpdb methods unavailable'); |
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} |
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|
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// DAO-bypass-approved: Diagnostic table charset/collation metadata probe. |
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$query = $wpdb->prepare( |
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"SELECT TABLE_COLLATION, ENGINE, " . |
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"SUBSTRING_INDEX(TABLE_COLLATION, '_', 1) as TABLE_CHARSET " . |
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"FROM information_schema.tables " . |
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"WHERE TABLE_NAME = %s AND TABLE_SCHEMA = DATABASE()", |
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$tableName |
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); |
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|
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// DAO-bypass-approved: Diagnostic information_schema.tables probe |
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$result = $wpdb->get_row($query, ARRAY_A); |
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|
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if (!empty($wpdb->last_error)) { |
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if (stripos($wpdb->last_error, 'denied') !== false || |
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stripos($wpdb->last_error, 'permission') !== false) { |
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return array('error' => 'permission denied'); |
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} |
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return array('error' => 'query error'); |
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} |
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|
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if (empty($result) || !is_array($result)) { |
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return null; |
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} |
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|
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$collation = $this->rowValue($result, 'TABLE_COLLATION'); |
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$engine = $this->rowValue($result, 'ENGINE') ?: 'Unknown'; |
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$charset = $this->rowValue($result, 'TABLE_CHARSET'); |
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|
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if (empty($charset) && !empty($collation)) { |
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$charset = explode('_', $collation)[0]; |
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} |
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|
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if (empty($collation)) { |
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return array('error' => 'no collation data'); |
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} |
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|
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return array( |
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'charset' => $charset, |
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'collation' => $collation, |
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'engine' => $engine |
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); |
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} |
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|
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/** |
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* @param string $tableName Table name to look up. |
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* @return array{charset?:string|null,collation?:string|null,engine?:string,error?:string}|null |
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*/ |
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public function tryShowTableStatus(string $tableName) { |
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/** @var \wpdb $wpdb */ |
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global $wpdb; |
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|
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if (!method_exists($wpdb, 'get_row')) { |
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return array('error' => 'wpdb methods unavailable'); |
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} |
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|
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// DAO-bypass-approved: Diagnostic fallback metadata probe needs SHOW TABLE STATUS directly. |
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$result = $wpdb->get_row( |
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// DAO-bypass-approved: prepare() is part of diagnostic SHOW TABLE STATUS metadata probing. |
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$wpdb->prepare("SHOW TABLE STATUS LIKE %s", $tableName), |
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ARRAY_A |
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); |
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|
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if (!empty($wpdb->last_error)) { |
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return array('error' => 'SHOW TABLE STATUS failed'); |
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} |
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|
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if (empty($result) || !is_array($result)) { |
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return null; |
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} |
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|
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$collation = $this->rowValue($result, 'Collation'); |
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$engine = $this->rowValue($result, 'Engine') ?: 'Unknown'; |
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$charset = (is_string($collation) && $collation !== '') ? explode('_', $collation)[0] : null; |
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|
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if (empty($collation)) { |
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return null; |
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} |
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|
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return array( |
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'charset' => $charset, |
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'collation' => $collation, |
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'engine' => $engine |
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); |
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} |
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|
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/** |
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* @param string $tableName Table name to look up. |
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* @return array{charset?:string|null,collation?:string|null,engine?:string,error?:string}|null |
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*/ |
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public function tryShowCreateTable(string $tableName) { |
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/** @var \wpdb $wpdb */ |
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global $wpdb; |
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|
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if (!is_object($wpdb) || !method_exists($wpdb, 'get_row')) { |
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return null; |
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} |
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|
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// @utf8-audit: opt-out - $tableName is built from $wpdb->prefix plus |
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// 'abj404_*' constants by the uninstall flow; never user input. |
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// DAO-bypass-approved: Diagnostic last-resort SHOW CREATE TABLE charset parse |
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$result = $wpdb->get_row("SHOW CREATE TABLE `" . esc_sql($tableName) . "`", ARRAY_N); |
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|
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if (empty($result[1])) { |
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return null; |
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} |
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|
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$ddl = is_string($result[1]) ? $result[1] : ''; |
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|
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preg_match('/(?:DEFAULT\s+)?(?:CHARSET|CHARACTER\s+SET)(?:\s*=\s*|\s+)([\w\d]+)/i', $ddl, $charsetMatch); |
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preg_match('/(?:DEFAULT\s+)?COLLATE(?:\s*=\s*|\s+)([\w\d_]+)/i', $ddl, $collationMatch); |
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preg_match('/ENGINE\s*=\s*([\w]+)/i', $ddl, $engineMatch); |
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|
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$charset = $charsetMatch[1] ?? null; |
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$collation = $collationMatch[1] ?? null; |
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$engine = $engineMatch[1] ?? 'Unknown'; |
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|
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if ($charset && !$collation) { |
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$collation = $charset . '_general_ci'; |
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} |
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|
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if (empty($charset) && empty($collation)) { |
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return null; |
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} |
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|
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return array( |
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'charset' => $charset ?: explode('_', $collation)[0], |
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'collation' => $collation, |
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'engine' => $engine |
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); |
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} |
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|
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/** |
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* @return array{charset:string,collation:string,engine:string,source:string} |
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*/ |
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public function getWpdbDefaults(): array { |
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global $wpdb; |
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|
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$charset = 'utf8mb4'; |
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$collation = 'utf8mb4_unicode_ci'; |
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|
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if (isset($wpdb->charset) && !empty($wpdb->charset)) { |
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$charset = $wpdb->charset; |
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} elseif (defined('DB_CHARSET') && DB_CHARSET) { |
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$charset = DB_CHARSET; |
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} |
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|
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if (isset($wpdb->collate) && !empty($wpdb->collate)) { |
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$collation = $wpdb->collate; |
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} |
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|
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return array( |
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'charset' => $charset, |
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'collation' => $collation, |
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'engine' => 'Unknown', |
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'source' => 'wpdb defaults' |
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); |
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} |
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|
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/** |
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* @param array<array-key, mixed> $row |
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* @param string $key |
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* @return string|null |
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*/ |
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private function rowValue(array $row, string $key): ?string { |
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foreach ($row as $rowKey => $value) { |
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if (is_string($rowKey) && strcasecmp($rowKey, $key) === 0) { |
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return is_string($value) ? $value : null; |
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} |
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} |
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return null; |
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} |
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} |
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|
