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<?php
/**
* MySQL connector class.
* @package sapphire
* @subpackage model
*/
class MySQLDatabase extends Database {
/**
* Connection to the DBMS.
* @var resource
*/
private $dbConn;
/**
* True if we are connected to a database.
* @var boolean
*/
private $active;
/**
* The name of the database.
* @var string
*/
private $database;
/**
* Connect to a MySQL database.
* @param array $parameters An map of parameters, which should include:
* - server: The server, eg, localhost
* - username: The username to log on with
* - password: The password to log on with
* - database: The database to connect to
*/
public function __construct($parameters) {
$this->dbConn = mysql_connect($parameters['server'], $parameters['username'], $parameters['password']);
$this->active = mysql_select_db($parameters['database'], $this->dbConn);
$this->database = $parameters['database'];
if(!$this->dbConn) {
$this->databaseError("Couldn't connect to MySQL database");
}
parent::__construct();
}
/**
* Not implemented, needed for PDO
*/
public function getConnect($parameters) {
return null;
}
/**
* Returns true if this database supports collations
* @return boolean
*/
public function supportsCollations() {
return $this->getVersion() >= 4.1;
}
/**
* The version of MySQL.
* @var float
*/
private $mysqlVersion;
/**
* Get the version of MySQL.
* @return float
*/
public function getVersion() {
if(!$this->mysqlVersion) {
$this->mysqlVersion = (float)substr(trim(ereg_replace("([A-Za-z-])", "", $this->query("SELECT VERSION()")->value())), 0, 3);
}
return $this->mysqlVersion;
}
/**
* Get the database server, namely mysql.
* @return string
*/
public function getDatabaseServer() {
return "mysql";
}
public function query($sql, $errorLevel = E_USER_ERROR) {
if(isset($_REQUEST['previewwrite']) && in_array(strtolower(substr($sql,0,strpos($sql,' '))), array('insert','update','delete','replace'))) {
Debug::message("Will execute: $sql");
return;
}
if(isset($_REQUEST['showqueries'])) {
$starttime = microtime(true);
}
$handle = mysql_query($sql, $this->dbConn);
if(isset($_REQUEST['showqueries'])) {
$endtime = round(microtime(true) - $starttime,4);
Debug::message("\n$sql\n{$endtime}ms\n", false);
}
if(!$handle && $errorLevel) $this->databaseError("Couldn't run query: $sql | " . mysql_error($this->dbConn), $errorLevel);
return new MySQLQuery($this, $handle);
}
public function getGeneratedID($table) {
return mysql_insert_id($this->dbConn);
}
/**
* OBSOLETE: Get the ID for the next new record for the table.
*
* @var string $table The name od the table.
* @return int
*/
public function getNextID($table) {
user_error('getNextID is OBSOLETE (and will no longer work properly)', E_USER_WARNING);
$result = $this->query("SELECT MAX(ID)+1 FROM `$table`")->value();
return $result ? $result : 1;
}
public function isActive() {
return $this->active ? true : false;
}
public function createDatabase() {
$this->query("CREATE DATABASE `$this->database`");
$this->query("USE `$this->database`");
$this->tableList = $this->fieldList = $this->indexList = null;
if(mysql_select_db($this->database, $this->dbConn)) {
$this->active = true;
return true;
}
}
/**
* Drop the database that this object is currently connected to.
* Use with caution.
*/
public function dropDatabase() {
$this->query("DROP DATABASE $this->database");
}
/**
* Returns the name of the currently selected database
*/
public function currentDatabase() {
return $this->database;
}
/**
* Switches to the given database.
* If the database doesn't exist, you should call createDatabase() after calling selectDatabase()
*/
public function selectDatabase($dbname) {
$this->database = $dbname;
if($this->databaseExists($this->database)) {
if(mysql_select_db($this->database, $this->dbConn)) $this->active = true;
}
$this->tableList = $this->fieldList = $this->indexList = null;
}
/**
* Returns true if the named database exists.
*/
public function databaseExists($name) {
$SQL_name = Convert::raw2sql($name);
return $this->query("SHOW DATABASES LIKE '$SQL_name'")->value() ? true : false;
}
public function createTable($tableName, $fields = null, $indexes = null) {
$fieldSchemas = $indexSchemas = "";
if(!isset($fields['ID'])) $fields['ID'] = "int(11) not null auto_increment";
if($fields) foreach($fields as $k => $v) $fieldSchemas .= "`$k` $v,\n";
if($indexes) foreach($indexes as $k => $v) $fieldSchemas .= $this->getIndexSqlDefinition($k, $v) . ",\n";
$this->query("CREATE TABLE `$tableName` (
$fieldSchemas
$indexSchemas
primary key (ID)
) TYPE=MyISAM");
}
/**
* Alter a table's schema.
* @param $table The name of the table to alter
* @param $newFields New fields, a map of field name => field schema
* @param $newIndexes New indexes, a map of index name => index type
* @param $alteredFields Updated fields, a map of field name => field schema
* @param $alteredIndexes Updated indexes, a map of index name => index type
*/
public function alterTable($tableName, $newFields = null, $newIndexes = null, $alteredFields = null, $alteredIndexes = null) {
$fieldSchemas = $indexSchemas = "";
$alterList = array();
if($newFields) foreach($newFields as $k => $v) $alterList[] .= "ADD `$k` $v";
if($newIndexes) foreach($newIndexes as $k => $v) $alterList[] .= "ADD " . $this->getIndexSqlDefinition($k, $v);
if($alteredFields) foreach($alteredFields as $k => $v) $alterList[] .= "CHANGE `$k` `$k` $v";
if($alteredIndexes) foreach($alteredIndexes as $k => $v) {
$alterList[] .= "DROP INDEX `$k`";
$alterList[] .= "ADD ". $this->getIndexSqlDefinition($k, $v);
}
$alterations = implode(",\n", $alterList);
$this->query("ALTER TABLE `$tableName` " . $alterations);
}
public function renameTable($oldTableName, $newTableName) {
$this->query("ALTER TABLE `$oldTableName` RENAME `$newTableName`");
}
/**
* Checks a table's integrity and repairs it if necessary.
* @var string $tableName The name of the table.
* @return boolean Return true if the table has integrity after the method is complete.
*/
public function checkAndRepairTable($tableName) {
if(!$this->runTableCheckCommand("CHECK TABLE `$tableName`")) {
Database::alteration_message("Table $tableName: repaired","repaired");
return $this->runTableCheckCommand("REPAIR TABLE `$tableName` USE_FRM");
} else {
return true;
}
}
/**
* Helper function used by checkAndRepairTable.
* @param string $sql Query to run.
* @return boolean Returns if the query returns a successful result.
*/
protected function runTableCheckCommand($sql) {
$testResults = $this->query($sql);
foreach($testResults as $testRecord) {
if(strtolower($testRecord['Msg_text']) != 'ok') {
return false;
}
}
return true;
}
public function createField($tableName, $fieldName, $fieldSpec) {
$this->query("ALTER TABLE `$tableName` ADD `$fieldName` $fieldSpec");
}
/**
* Change the database type of the given field.
* @param string $tableName The name of the tbale the field is in.
* @param string $fieldName The name of the field to change.
* @param string $fieldSpec The new field specification
*/
public function alterField($tableName, $fieldName, $fieldSpec) {
$this->query("ALTER TABLE `$tableName` CHANGE `$fieldName` `$fieldName` $fieldSpec");
}
/**
* Change the database column name of the given field.
*
* @param string $tableName The name of the tbale the field is in.
* @param string $oldName The name of the field to change.
* @param string $newName The new name of the field
*/
public function renameField($tableName, $oldName, $newName) {
$fieldList = $this->fieldList($tableName);
if(array_key_exists($oldName, $fieldList)) {
$this->query("ALTER TABLE `$tableName` CHANGE `$oldName` `$newName` " . $fieldList[$oldName]);
}
}
private static $_cache_collation_info = array();
public function fieldList($table) {
$fields = DB::query("SHOW FULL FIELDS IN `$table`");
foreach($fields as $field) {
$fieldSpec = $field['Type'];
if(!$field['Null'] || $field['Null'] == 'NO') {
$fieldSpec .= ' not null';
}
if($field['Collation'] && $field['Collation'] != 'NULL') {
// Cache collation info to cut down on database traffic
if(!isset(self::$_cache_collation_info[$field['Collation']])) {
self::$_cache_collation_info[$field['Collation']] = DB::query("SHOW COLLATION LIKE '$field[Collation]'")->record();
}
$collInfo = self::$_cache_collation_info[$field['Collation']];
$fieldSpec .= " character set $collInfo[Charset] collate $field[Collation]";
}
if($field['Default'] || $field['Default'] === "0") {
$fieldSpec .= " default '" . Convert::raw2sql($field['Default']) . "'";
}
if($field['Extra']) $fieldSpec .= " $field[Extra]";
$fieldList[$field['Field']] = $fieldSpec;
}
return $fieldList;
}
/**
* Create an index on a table.
* @param string $tableName The name of the table.
* @param string $indexName The name of the index.
* @param string $indexSpec The specification of the index, see Database::requireIndex() for more details.
*/
public function createIndex($tableName, $indexName, $indexSpec) {
$this->query("ALTER TABLE `$tableName` ADD " . $this->getIndexSqlDefinition($indexName, $indexSpec));
}
protected function getIndexSqlDefinition($indexName, $indexSpec) {
$indexSpec = trim($indexSpec);
if($indexSpec[0] != '(') list($indexType, $indexFields) = explode(' ',$indexSpec,2);
else $indexFields = $indexSpec;
if(!isset($indexType)) {
$indexType = "index";
}
return "$indexType `$indexName` $indexFields";
}
/**
* Alter an index on a table.
* @param string $tableName The name of the table.
* @param string $indexName The name of the index.
* @param string $indexSpec The specification of the index, see Database::requireIndex() for more details.
*/
public function alterIndex($tableName, $indexName, $indexSpec) {
$indexSpec = trim($indexSpec);
if($indexSpec[0] != '(') {
list($indexType, $indexFields) = explode(' ',$indexSpec,2);
} else {
$indexFields = $indexSpec;
}
if(!$indexType) {
$indexType = "index";
}
$this->query("ALTER TABLE `$tableName` DROP INDEX `$indexName`");
$this->query("ALTER TABLE `$tableName` ADD $indexType `$indexName` $indexFields");
}
/**
* Return the list of indexes in a table.
* @param string $table The table name.
* @return array
*/
public function indexList($table) {
$indexes = DB::query("SHOW INDEXES IN `$table`");
foreach($indexes as $index) {
$groupedIndexes[$index['Key_name']]['fields'][$index['Seq_in_index']] = $index['Column_name'];
if($index['Index_type'] == 'FULLTEXT') {
$groupedIndexes[$index['Key_name']]['type'] = 'fulltext ';
} else if(!$index['Non_unique']) {
$groupedIndexes[$index['Key_name']]['type'] = 'unique ';
} else {
$groupedIndexes[$index['Key_name']]['type'] = '';
}
}
foreach($groupedIndexes as $index => $details) {
ksort($details['fields']);
$indexList[$index] = $details['type'] . '(' . implode(',',$details['fields']) . ')';
}
return $indexList;
}
/**
* Returns a list of all the tables in the database.
* Table names will all be in lowercase.
* @return array
*/
public function tableList() {
$tables = array();
foreach($this->query("SHOW TABLES") as $record) {
$table = strtolower(reset($record));
$tables[$table] = $table;
}
return $tables;
}
/**
* Return the number of rows affected by the previous operation.
* @return int
*/
public function affectedRows() {
return mysql_affected_rows($this->dbConn);
}
function databaseError($msg, $errorLevel = E_USER_ERROR) {
// try to extract and format query
if(preg_match('/Couldn\'t run query: ([^\|]*)\|\s*(.*)/', $msg, $matches)) {
$formatter = new SQLFormatter();
$msg = "Couldn't run query: \n" . $formatter->formatPlain($matches[1]) . "\n\n" . $matches[2];
}
user_error($msg, $errorLevel);
}
/*
* This will return text which has been escaped in a database-friendly manner.
*/
function addslashes($value){
return mysql_real_escape_string($value, $this->dbConn);
}
}
/**
* A result-set from a MySQL database.
* @package sapphire
* @subpackage model
*/
class MySQLQuery extends Query {
/**
* The MySQLDatabase object that created this result set.
* @var MySQLDatabase
*/
private $database;
/**
* The internal MySQL handle that points to the result set.
* @var resource
*/
private $handle;
/**
* Hook the result-set given into a Query class, suitable for use by sapphire.
* @param database The database object that created this query.
* @param handle the internal mysql handle that is points to the resultset.
*/
public function __construct(MySQLDatabase $database, $handle) {
$this->database = $database;
$this->handle = $handle;
parent::__construct();
}
public function __destroy() {
mysql_free_result($this->handle);
}
public function seek($row) {
return mysql_data_seek($this->handle, $row);
}
public function numRecords() {
return mysql_num_rows($this->handle);
}
public function nextRecord() {
// Coalesce rather than replace common fields.
if($data = mysql_fetch_row($this->handle)) {
foreach($data as $columnIdx => $value) {
$columnName = mysql_field_name($this->handle, $columnIdx);
// $value || !$ouput[$columnName] means that the *last* occurring value is shown
// !$ouput[$columnName] means that the *first* occurring value is shown
if(isset($value) || !isset($output[$columnName])) {
$output[$columnName] = $value;
}
}
return $output;
} else {
return false;
}
}
}
?>
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