mirror of
https://port.numenaute.org/aleajactaest/khanat-opennel-code.git
synced 2024-12-11 12:24:47 +00:00
765e614c23
--HG-- branch : develop
272 lines
9.5 KiB
PHP
272 lines
9.5 KiB
PHP
<?php
|
|
/**
|
|
* Handles the database connections. It uses PDO to connect to the different databases. It will use the argument of the constructor to setup a connection to the database
|
|
* with the matching entry in the $cfg global variable.
|
|
*
|
|
* --> First create an object of dblayer --> $db = new DBLayer('short database name used in config')
|
|
*
|
|
* --> Insert --> $db->insert( $tb_name, $data )
|
|
* $tb_name = table name in which we want to insert data
|
|
* $data = array of data that needs to be inserted in format('fieldname' => $value) where fieldname must be a field in that table.
|
|
*
|
|
* --> select --> $db->select( $tb_name, $data, $where )
|
|
* $tb_name = table name which we want to select
|
|
* $data = array of data which is then required in WHERE clause in format array('fieldname'=>$value) fieldname must be a field in that table.
|
|
* $where = string in format ('fieldname=:fieldname') where :fieldname takes it's value from $data array.
|
|
*
|
|
* --> update --> $db->update( $tb_name, $data, $where )
|
|
* $tb_name = table name which we want to update
|
|
* $data = array of data which contains the filelds that need to be updated with their values in the format('fieldname' => $value,...) where fieldname must be a field in that table.
|
|
* $where = string contains the filename with a value at that field in the format ('fieldname = $value') where fieldname must be a field in that table and $value is value respect to that field.
|
|
*
|
|
* --> delete --> $db->delete( $tb_name, $data, $where )
|
|
* $tb_name = table name where we want to delete.
|
|
* $data = array of data which is then required in WHERE clause in format array('fieldname'=> $value) where fieldname must be a field in that table.
|
|
* $where = string in format ('fieldname=:fieldname') where :fieldname takes it's value from $data array.
|
|
*
|
|
*
|
|
* @author Daan Janssens, mentored by Matthew Lagoe
|
|
*
|
|
*/
|
|
|
|
$PDOCache = array();
|
|
|
|
class DBLayer {
|
|
|
|
private $PDO;
|
|
private $host;
|
|
private $dbname;
|
|
|
|
/**
|
|
* The PDO object, instantiated by the constructor
|
|
*/
|
|
|
|
/**
|
|
* The constructor.
|
|
* Instantiates the PDO object attribute by connecting to the arguments matching database(the db info is stored in the $cfg global var)
|
|
*
|
|
* @param $db String, the name of the databases entry in the $cfg global var.
|
|
* @param $dbn String, the name of the databases entry in the $cfg global var if $db referenced to an action(install etc).
|
|
*/
|
|
function __construct($db, $dbn = null) {
|
|
if ($db == "ring" && $dbn == null) {
|
|
throw new Exception("Domain database access from AMS must have database name specified");
|
|
}
|
|
|
|
global $cfg;
|
|
$this->host = $cfg['db'][$db]['host'];
|
|
$this->dbname = $cfg['db'][$db]['name'];
|
|
global $PDOCache;
|
|
if (isset($PDOCache[$this->host])) {
|
|
if (isset($PDOCache[$this->host]['exception'])) {
|
|
throw $PDOCache[$this->host]['exception'];
|
|
}
|
|
$this->PDO = $PDOCache[$this->host]['pdo'];
|
|
} else {
|
|
$dsn = "mysql:";
|
|
$dsn .= "host=" . $cfg['db'][$db]['host'] . ";";
|
|
// $dsn .= "dbname=" . $cfg['db'][$db]['name'] . ";"; // Comment this out when using the cache
|
|
$dsn .= "port=" . $cfg['db'][$db]['port'] . ";";
|
|
|
|
$opt = array(
|
|
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
|
|
PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
|
|
// PDO::ATTR_PERSISTENT => true,
|
|
PDO::ATTR_TIMEOUT => 5
|
|
);
|
|
$PDOCache[$this->host] = array();
|
|
try {
|
|
$this->PDO = new PDO($dsn, $cfg['db'][$db]['user'], $cfg['db'][$db]['pass'], $opt);
|
|
} catch (PDOException $e) {
|
|
$exception = new PDOException("Failed to connect to the '" . $db . "' database server", $e->getCode());
|
|
$PDOCache[$this->host]['exception'] = $exception;
|
|
throw $exception;
|
|
return;
|
|
}
|
|
$PDOCache[$this->host]['pdo'] = $this->PDO;
|
|
$PDOCache[$this->host]['use'] = $this->dbname;
|
|
$this->PDO->query('USE ' . $this->dbname . ';'); // FIXME safety
|
|
}
|
|
}
|
|
|
|
function __destruct() {
|
|
$this->PDO = NULL;
|
|
}
|
|
|
|
function useDb() {
|
|
global $PDOCache;
|
|
if ($PDOCache[$this->host]['use'] != $this->dbname) {
|
|
$PDOCache[$this->host]['use'] = $this->dbname;
|
|
$this->PDO->query('USE ' . $this->dbname . ';'); // FIXME safety
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Execute a query that doesn't have any parameters.
|
|
*
|
|
* @param $query the mysql query.
|
|
* @return returns a PDOStatement object.
|
|
*/
|
|
public function executeWithoutParams($query) {
|
|
$this->useDb();
|
|
$statement = $this->PDO->prepare($query);
|
|
$statement->execute();
|
|
return $statement;
|
|
}
|
|
|
|
/**
|
|
* Execute a query that has parameters.
|
|
*
|
|
* @param $query the mysql query.
|
|
* @param $params the parameters that are being used by the query.
|
|
* @return returns a PDOStatement object.
|
|
*/
|
|
public function execute( $query, $params ) {
|
|
$this->useDb();
|
|
$statement = $this -> PDO -> prepare( $query );
|
|
$statement -> execute( $params );
|
|
return $statement;
|
|
}
|
|
|
|
/**
|
|
* Insert function which returns id of the inserting field.
|
|
*
|
|
* @param $tb_name table name where we want to insert data.
|
|
* @param $data the parameters that are being inserted into table.
|
|
* @return returns the id of the last inserted element.
|
|
*/
|
|
public function executeReturnId($tb_name, $data, $datafunc = array()) {
|
|
$this->useDb();
|
|
$field_options = implode(',', array_merge(array_keys($data), array_keys($datafunc)));
|
|
$field_values = implode(',', array_merge(array(':' . implode(',:', array_keys($data))), array_values($datafunc)));
|
|
try {
|
|
$sth = $this -> PDO -> prepare( "INSERT INTO $tb_name ($field_options) VALUE ($field_values)" );
|
|
foreach ($data as $key => $value) {
|
|
$sth->bindValue( ":$key", $value );
|
|
}
|
|
$sth->execute();
|
|
$lastId = $this->PDO->lastInsertId();
|
|
}
|
|
catch (Exception $e) {
|
|
throw $e; // new Exception( "error in inseting" );
|
|
}
|
|
return $lastId;
|
|
}
|
|
|
|
/**
|
|
* Select function using prepared statement.
|
|
* For selecting particular fields.
|
|
*
|
|
* @param string $param field to select, can be multiple fields.
|
|
* @param string $tb_name Table Name to Select.
|
|
* @param array $data array of data to be used in WHERE clause in format('fieldname'=>$value). 'fieldname' must be a field in that table.
|
|
* @param string $where where to select.
|
|
* @return statement object.
|
|
*/
|
|
public function selectWithParameter( $param, $tb_name, $data, $where ) {
|
|
$this->useDb();
|
|
try {
|
|
$sth = $this->PDO->prepare("SELECT $param FROM $tb_name WHERE $where");
|
|
$sth->execute($data);
|
|
}
|
|
catch (Exception $e) {
|
|
throw $e; // new Exception( "error selection" );
|
|
return false;
|
|
}
|
|
return $sth;
|
|
}
|
|
|
|
/**
|
|
* Select function using prepared statement.
|
|
* For selecting all fields in a table.
|
|
*
|
|
* @param string $tb_name Table Name to Select.
|
|
* @param array $data array of data to be used with WHERE part in format('fieldname'=>$value,...). 'fieldname' must be a field in that table.
|
|
* @param string $where where to select in format('fieldname=:fieldname' AND ...).
|
|
* @return statement object.
|
|
*/
|
|
public function select($tb_name, $data , $where) {
|
|
$this->useDb();
|
|
try {
|
|
$sth = $this->PDO->prepare("SELECT * FROM $tb_name WHERE $where");
|
|
$sth->execute( $data );
|
|
}
|
|
catch (Exception $e) {
|
|
throw $e; // new Exception( "error selection" );
|
|
return false;
|
|
}
|
|
return $sth;
|
|
}
|
|
|
|
/**
|
|
* Update function with prepared statement.
|
|
*
|
|
* @param string $tb_name name of the table on which operation to be performed.
|
|
* @param array $data array of data in format('fieldname' => $value,...).Here, only those fields must be stored which needs to be updated.
|
|
* @param string $where where part in format ('fieldname'= $value AND ...). 'fieldname' must be a field in that table.
|
|
* @throws Exception error in updating.
|
|
*/
|
|
public function update($tb_name, $data, $where) {
|
|
$this->useDb();
|
|
$field_option_values = null;
|
|
foreach ( $data as $key => $value ) {
|
|
$field_option_values .= ",$key" . '=:' . $key;
|
|
}
|
|
$field_option_values = ltrim($field_option_values, ',');
|
|
try {
|
|
$sth = $this->PDO->prepare("UPDATE `$tb_name` SET $field_option_values WHERE $where ");
|
|
|
|
foreach ($data as $key => $value) {
|
|
$sth->bindValue(":$key", $value);
|
|
}
|
|
$sth->execute();
|
|
}
|
|
catch (Exception $e) {
|
|
throw $e; // new Exception( 'error in updating' );
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* insert function using prepared statements.
|
|
*
|
|
* @param string $tb_name Name of the table on which operation to be performed.
|
|
* @param array $data array of data to insert in format('fieldname' => $value,....). 'fieldname' must be a field in that table.
|
|
* @throws error in inserting.
|
|
*/
|
|
public function insert($tb_name, $data, $datafunc = array()) {
|
|
$this->useDb();
|
|
$field_options = '`'.implode('`,`', array_merge(array_keys($data), array_keys($datafunc))).'`';
|
|
$field_values = implode(',', array_merge(array(':' . implode(',:', array_keys($data))), array_values($datafunc)));
|
|
try {
|
|
$sth = $this->PDO->prepare("INSERT INTO $tb_name ($field_options) VALUE ($field_values)");
|
|
foreach ($data as $key => $value) {
|
|
$sth->bindValue(":$key", $value);
|
|
}
|
|
$sth->execute();
|
|
}
|
|
catch (Exception $e) {
|
|
throw $e; // new Exception("error in inserting");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Delete database entery using prepared statement.
|
|
*
|
|
* @param string $tb_name table name on which operations to be performed.
|
|
* @param $data array with values in the format('fieldname'=> $value,...). 'fieldname' must be a field in that table.
|
|
* @param string $where condition based on $data array in the format('fieldname=:fieldname' AND ...).
|
|
* @throws error in deleting.
|
|
*/
|
|
public function delete( $tb_name, $data, $where ) {
|
|
$this->useDb();
|
|
try {
|
|
$sth = $this->PDO->prepare("DELETE FROM $tb_name WHERE $where");
|
|
$sth->execute($data);
|
|
}
|
|
catch (Exception $e) {
|
|
throw $e; // new Exception( "error in deleting" );
|
|
}
|
|
}
|
|
}
|