:fire: Cleanup old database related files.

Remove non used database drivers, remove unused methods.
Improve documentation.

5 files changed, 60 insertions, 332 deletions

diff --git a/include/dba/dba_driver.php b/include/dba/dba_driver.php
index deec9adfd..b3298b673 100755
--- a/include/dba/dba_driver.php
+++ b/include/dba/dba_driver.php
@@ -1,15 +1,20 @@
 <?php
+/**
+ * @file dba_driver.php
+ * @brief Some database related functions and database classes.
+ *
+ * This file contains the abstract database driver class dba_driver, the
+ * database class DBA and some functions for working with databases.
+ */
 
+/**
+ * @brief Database classs with database factory method.
+ *
+ * The factory will return a database driver which is an implementation of the
+ * abstract dba_driver class.
+ */
 class DBA {
 
-	/**
-	 * @file dba_driver.php
-	 * @brief some database related functions and abstract driver class.
-	 *
-	 * This file contains the abstract database driver class dba_driver and some
-	 * functions for working with databases.
-	 */
-
 	static public $dba = null;
 	static public $dbtype = null;
 	static public $scheme = 'mysql';
@@ -21,7 +26,6 @@ class DBA {
 	static public $tquot = "`";
 
 
-
 	/**
 	 * @brief Returns the database driver object.
 	 *
@@ -34,14 +38,11 @@ class DBA {
 	 * @param bool $install Defaults to false
 	 * @return null|dba_driver A database driver object (dba_pdo) or null if no driver found.
 	 */
-
 	static public function dba_factory($server,$port,$user,$pass,$db,$dbtype,$install = false) {
 
 		self::$dba = null;
-
 		self::$dbtype = intval($dbtype);
 
-
 		if(self::$dbtype == DBTYPE_POSTGRES) {
 			if(!($port))
 				$port = 5432;
@@ -50,7 +51,6 @@ class DBA {
 			self::$utc_now = "now() at time zone 'UTC'";
 			self::$tquot = '"';
 			self::$scheme = 'pgsql';
-
 		}
 		else {
 
@@ -66,40 +66,27 @@ class DBA {
 
 		require_once('include/dba/dba_pdo.php');
 		self::$dba = new dba_pdo($server,self::$scheme,$port,$user,$pass,$db,$install);
-		
-		if(is_object(self::$dba) && self::$dba->connected) {
-
-			if(strpbrk($server,':;')) {
-				$dsn = $server;
-			}
-			else {
-				$dsn = self::$scheme . ':host=' . $server . (intval($port) ? '' : ';port=' . $port);
-			}
-			$dsn .= ';dbname=' . $db;
-
-
-			self::$dba->pdo_set(array($dsn,$user,$pass));
-		}
 
 		define('NULL_DATE', self::$null_date);
 		define('ACTIVE_DBTYPE', self::$dbtype);
 		define('TQUOT', self::$tquot);
+
 		return self::$dba;
 	}
 
 }
 
 /**
- * @brief abstract database driver class.
+ * @brief Abstract database driver class.
  *
- * This class gets extended by the real database driver classes, e.g. dba_mysql,
- * dba_mysqli.
+ * This class gets extended by the real database driver class. We used to have
+ * dba_mysql, dba_mysqli or dba_postgres, but we moved to PDO and the only
+ * implemented driver is dba_pdo.
  */
 abstract class dba_driver {
 	// legacy behavior
 
 	public $db;
-	protected $pdo = array();
 
 	public  $debug = 0;
 	public  $connected = false;
@@ -111,6 +98,7 @@ abstract class dba_driver {
 	 * This abstract function needs to be implemented in the real driver.
 	 *
 	 * @param string $server DB server name
+	 * @param string $scheme DB scheme
 	 * @param string $port DB port
 	 * @param string $user DB username
 	 * @param string $pass DB password
@@ -166,6 +154,7 @@ abstract class dba_driver {
 		$platform_name = \Zotlabs\Lib\System::get_platform_name();
 		if(file_exists('install/' . $platform_name . '/' . \DBA::$install_script))
 			 return 'install/' . $platform_name . '/' . \DBA::$install_script;
+
 		return 'install/' . \DBA::$install_script;
 	}
 
@@ -173,7 +162,6 @@ abstract class dba_driver {
 		return \DBA::$tquot;
 	}
 
-
 	function utcnow() {
 		return \DBA::$utc_now;
 	}
@@ -232,19 +220,12 @@ abstract class dba_driver {
 		return $str;
 	}
 
-	function pdo_set($x) {
-		$this->pdo = $x;
-	}
-
-	function pdo_get() {
-		return $this->pdo;
-	}
-
 } // end abstract dba_driver class
 
 
-
+//
 // Procedural functions
+//
 
 function printable($s) {
 	$s = preg_replace("~([\x01-\x08\x0E-\x0F\x10-\x1F\x7F-\xFF])~",".", $s);
@@ -275,7 +256,7 @@ function dbg($state) {
  * wrapping with intval().
  *
  * @param string $str A string to pass to a DB query
- * @return Return an escaped string of the value to pass to a DB query.
+ * @return string Return an escaped string of the value to pass to a DB query.
  */
 function dbesc($str) {
 
@@ -298,6 +279,7 @@ function dbunescbin($str) {
 function dbescdate($date) {
 	if(is_null_date($date))
 		return \DBA::$dba->escape(NULL_DATE);
+
 	return \DBA::$dba->escape($date);
 }
 
@@ -330,17 +312,17 @@ function db_use_index($str) {
  *
  * printf style arguments %s and %d are replaced with variable arguments, which
  * should each be appropriately dbesc() or intval().
+ *
  * SELECT queries return an array of results or false if SQL or DB error. Other
  * queries return true if the command was successful or false if it wasn't.
  *
  * Example:
- *  $r = q("SELECT * FROM %s WHERE `uid` = %d",
- *         'user', 1);
+ * @code{.php}$r = q("SELECT * FROM %s WHERE `uid` = %d",
+ *         'user', 1);@endcode
  *
  * @param string $sql The SQL query to execute
  * @return bool|array
  */
-
 function q($sql) {
 
 	$args = func_get_args();
@@ -359,8 +341,8 @@ function q($sql) {
 	}
 
 	/*
-	 * This will happen occasionally trying to store the 
-	 * session data after abnormal program termination 
+	 * This will happen occasionally trying to store the
+	 * session data after abnormal program termination
 	 */
 
 	db_logger('dba: no database: ' . print_r($args,true),LOGGER_NORMAL,LOG_CRIT);
@@ -389,8 +371,8 @@ function dbq($sql) {
 
 // Caller is responsible for ensuring that any integer arguments to
 // dbesc_array are actually integers and not malformed strings containing
-// SQL injection vectors. All integer array elements should be specifically 
-// cast to int to avoid trouble. 
+// SQL injection vectors. All integer array elements should be specifically
+// cast to int to avoid trouble.
 
 function dbesc_array_cb(&$item, $key) {
 	if(is_string($item)) {
@@ -423,7 +405,7 @@ function dbesc_array(&$arr) {
 function db_getfunc($f) {
 	$lookup = array(
 		'rand'=>array(
-			DBTYPE_MYSQL=>'RAND()', 
+			DBTYPE_MYSQL=>'RAND()',
 			DBTYPE_POSTGRES=>'RANDOM()'
 		),
 		'utc_timestamp'=>array(
diff --git a/include/dba/dba_mysql.php b/include/dba/dba_mysql.php
deleted file mode 100755
index 8b51cf578..000000000
--- a/include/dba/dba_mysql.php
+++ /dev/null
@@ -1,67 +0,0 @@
-<?php
-
-require_once('include/dba/dba_driver.php');
-
-
-class dba_mysql extends dba_driver {
-
-	function connect($server, $scheme, $port, $user,$pass,$db) {
-		$this->db = mysql_connect($server.":".$port,$user,$pass);
-		if($this->db && mysql_select_db($db,$this->db)) {
-			$this->connected = true;
-		}
-		if($this->connected) {
-			return true;
-		}
-		return false;
-	}
-
-
-	function q($sql) {
-		if((! $this->db) || (! $this->connected))
-			return false;
-
-		$this->error = '';
-		$result = @mysql_query($sql,$this->db);
-
-
-		if(mysql_errno($this->db))
-			$this->error = mysql_error($this->db);
-
-		if($result === false || $this->error) {
-			logger('dba_mysql: ' . printable($sql) . ' returned false.' . "\n" . $this->error);
-			if(file_exists('dbfail.out'))
-				file_put_contents('dbfail.out', datetime_convert() . "\n" . printable($sql) . ' returned false' . "\n" . $this->error . "\n", FILE_APPEND);
-		}
-
-		if(($result === true) || ($result === false))
-			return $result;
-
-		$r = array();
-		if(mysql_num_rows($result)) {
-			while($x = mysql_fetch_array($result,MYSQL_ASSOC))
-				$r[] = $x;
-			mysql_free_result($result);
-			if($this->debug)
-				logger('dba_mysql: ' . printable(print_r($r,true)));
-		}
-		return $r;
-	}
-
-	function escape($str) {
-		if($this->db && $this->connected) {
-			return @mysql_real_escape_string($str,$this->db);
-		}
-	}
-
-	function close() {
-		if($this->db)
-			mysql_close($this->db);
-		$this->connected = false;
-	}
-	
-	function getdriver() {
-		return 'mysql';
-	}
-
-}	
diff --git a/include/dba/dba_mysqli.php b/include/dba/dba_mysqli.php
deleted file mode 100755
index 165c8e969..000000000
--- a/include/dba/dba_mysqli.php
+++ /dev/null
@@ -1,86 +0,0 @@
-<?php /** @file */
-
-require_once('include/dba/dba_driver.php');
-
-class dba_mysqli extends dba_driver {
-
-	function connect($server,$scheme,$port,$user,$pass,$db) {
-		if($port)
-			$this->db = new mysqli($server,$user,$pass,$db, $port);
-		else
-			$this->db = new mysqli($server,$user,$pass,$db);
-
-		if($this->db->connect_error) {
-			$this->connected = false;
-			$this->error = $this->db->connect_error;
-
-			if(file_exists('dbfail.out')) {
-				file_put_contents('dbfail.out', datetime_convert() . "\nConnect: " . $this->error . "\n", FILE_APPEND);
-			}
-
-			return false;
-		}
-		else {
-			$this->connected = true;
-			return true;
-		}
-	}
-
-	function q($sql) {
-		if((! $this->db) || (! $this->connected))
-			return false;
-
-		$this->error = '';
-		$result = $this->db->query($sql);
-
-		if($this->db->errno)
-			$this->error = $this->db->error;
-
-
-		if($this->error) {
-			db_logger('dba_mysqli: ERROR: ' . printable($sql) . "\n" . $this->error, LOGGER_NORMAL, LOG_ERR);
-			if(file_exists('dbfail.out')) {
-				file_put_contents('dbfail.out', datetime_convert() . "\n" . printable($sql) . "\n" . $this->error . "\n", FILE_APPEND);
-			}
-		}
-
-		if(($result === true) || ($result === false)) {
-			if($this->debug) {
-				db_logger('dba_mysqli: DEBUG: ' . printable($sql) . ' returns ' . (($result) ? 'true' : 'false'), LOGGER_NORMAL,(($result) ? LOG_INFO : LOG_ERR));
-			}
-			return $result;
-		}
-
-		if($this->debug) {
-			db_logger('dba_mysqli: DEBUG: ' . printable($sql) . ' returned ' . $result->num_rows . ' results.', LOGGER_NORMAL, LOG_INFO); 
-		}
-
-		$r = array();
-		if($result->num_rows) {
-			while($x = $result->fetch_array(MYSQLI_ASSOC))
-				$r[] = $x;
-			$result->free_result();
-			if($this->debug) {
-				db_logger('dba_mysqli: ' . printable(print_r($r,true)), LOGGER_NORMAL, LOG_INFO);
-			}
-		}
-		return $r;
-	}
-
-	function escape($str) {
-		if($this->db && $this->connected) {
-			return @$this->db->real_escape_string($str);
-		}
-	}
-
-	function close() {
-		if($this->db)
-			$this->db->close();
-		$this->connected = false;
-	}
-	
-	function getdriver() {
-		return 'mysqli';
-	}
-
-}
\ No newline at end of file
diff --git a/include/dba/dba_pdo.php b/include/dba/dba_pdo.php
index a9d824a50..719f23c4b 100755
--- a/include/dba/dba_pdo.php
+++ b/include/dba/dba_pdo.php
@@ -1,14 +1,21 @@
-<?php /** @file */
+<?php
 
-require_once('include/dba/dba_driver.php');
+require_once 'include/dba/dba_driver.php';
 
+/**
+ * @brief PDO based database driver.
+ *
+ */
 class dba_pdo extends dba_driver {
 
-
 	public $driver_dbtype = null;
 
-	function connect($server,$scheme,$port,$user,$pass,$db) {
-		
+	/**
+	 * {@inheritDoc}
+	 * @see dba_driver::connect()
+	 */
+	function connect($server, $scheme, $port, $user, $pass, $db) {
+
 		$this->driver_dbtype = $scheme;
 
 		if(strpbrk($server,':;')) {
@@ -17,7 +24,7 @@ class dba_pdo extends dba_driver {
 		else {
 			$dsn = $this->driver_dbtype . ':host=' . $server . (intval($port) ? ';port=' . $port : '');
 		}
-		
+
 		$dsn .= ';dbname=' . $db;
 
 		try {
@@ -36,10 +43,19 @@ class dba_pdo extends dba_driver {
 			$this->q("SET standard_conforming_strings = 'off'; SET backslash_quote = 'on';");
 
 		$this->connected = true;
-		return true;
 
+		return true;
 	}
 
+	/**
+	 * {@inheritDoc}
+	 * @see dba_driver::q()
+	 *
+	 * @return bool|array|PDOStatement
+	 *   - \b false if not connected or PDOException occured on query
+	 *   - \b array with results on a SELECT query
+	 *   - \b PDOStatement on a non SELECT SQL query
+	 */
 	function q($sql) {
 		if((! $this->db) || (! $this->connected))
 			return false;
@@ -57,7 +73,7 @@ class dba_pdo extends dba_driver {
 			$result = $this->db->query($sql, PDO::FETCH_ASSOC);
 		}
 		catch(PDOException $e) {
-	
+
 			$this->error = $e->getMessage();
 			if($this->error) {
 				db_logger('dba_pdo: ERROR: ' . printable($sql) . "\n" . $this->error, LOGGER_NORMAL, LOG_ERR);
@@ -82,11 +98,10 @@ class dba_pdo extends dba_driver {
 		}
 
 		if($this->debug) {
-			db_logger('dba_pdo: DEBUG: ' . printable($sql) . ' returned ' . count($r) . ' results.', LOGGER_NORMAL, LOG_INFO); 
+			db_logger('dba_pdo: DEBUG: ' . printable($sql) . ' returned ' . count($r) . ' results.', LOGGER_NORMAL, LOG_INFO);
 			db_logger('dba_pdo: ' . printable(print_r($r,true)), LOGGER_NORMAL, LOG_INFO);
 		}
 
-
 		return (($this->error) ? false : $r);
 	}
 
@@ -99,9 +114,10 @@ class dba_pdo extends dba_driver {
 	function close() {
 		if($this->db)
 			$this->db = null;
+
 		$this->connected = false;
 	}
-	
+
 	function concat($fld,$sep) {
 		if($this->driver_dbtype === 'pgsql') {
 			return 'string_agg(' . $fld . ',\'' . $sep . '\')';
@@ -140,7 +156,7 @@ class dba_pdo extends dba_driver {
 			return $this->escape($str);
 		}
 	}
-	
+
 	function unescapebin($str) {
 		if($this->driver_dbtype === 'pgsql' && (! is_null($str))) {
 			$x = '';
diff --git a/include/dba/dba_postgres.php b/include/dba/dba_postgres.php
deleted file mode 100644
index 560d8da60..000000000
--- a/include/dba/dba_postgres.php
+++ /dev/null
@@ -1,117 +0,0 @@
-<?php
-
-require_once('include/dba/dba_driver.php');
-
-
-class dba_postgres extends dba_driver {
-	const INSTALL_SCRIPT='install/schema_postgres.sql';
-	const NULL_DATE = '0001-01-01 00:00:00';
-	const UTC_NOW = "now() at time zone 'UTC'";
-	const TQUOT = '"';
-	
-	function connect($server,$scheme,$port,$user,$pass,$db) {
-		if(!$port) $port = 5432;
-		$connstr = 'host=' . $server . ' port='.$port . ' user=' . $user . ' password=' . $pass . ' dbname='. $db;
-		$this->db = pg_connect($connstr);
-		if($this->db !== false) {
-			$this->connected = true;
-		} else {
-			$this->connected = false;
-		}
-		$this->q("SET standard_conforming_strings = 'off'; SET backslash_quote = 'on';"); // emulate mysql string escaping to prevent massive code-clobber
-		return $this->connected;
-	}
-	
-	function q($sql) {
-		if((! $this->db) || (! $this->connected))
-			return false;
-		
-		if(!strpos($sql, ';'))
-			$sql .= ';';
-			
-		if(strpos($sql, '`')) // this is a hack. quoted identifiers should be replaced everywhere in the code with dbesc_identifier(), remove this once it is
-			$sql = str_replace('`', '"', $sql);
-			
-		$this->error = '';
-		$result = @pg_query($this->db, $sql);
-		if(file_exists('db-allqueries.out')) {
-			$bt = debug_backtrace();
-			$trace = array();
-			foreach($bt as $frame) {
-				if(!empty($frame['file']) && @strstr($frame['file'], $_SERVER['DOCUMENT_ROOT']))
-					$frame['file'] = substr($frame['file'], strlen($_SERVER['DOCUMENT_ROOT'])+1);
-					
-				$trace[] = $frame['file'] . ':' . $frame['function'] . '():' . $frame['line'] ;
-			}
-			$compact = join(', ', $trace);
-			file_put_contents('db-allqueries.out', datetime_convert() . ": " . $sql . ' is_resource: '.var_export(is_resource($result), true).', backtrace: '.$compact."\n\n", FILE_APPEND);
-		}
-
-		if($result === false)
-			$this->error = pg_last_error($this->db);
-
-		if($result === false || $this->error) {
-			//db_logger('dba_postgres: ' . printable($sql) . ' returned false.' . "\n" . $this->error);
-			if(file_exists('dbfail.out'))
-				file_put_contents('dbfail.out', datetime_convert() . "\n" . printable($sql) . ' returned false' . "\n" . $this->error . "\n", FILE_APPEND);
-		}
-			
-		if(($result === true) || ($result === false))
-			return $result;
-		
-		if(pg_result_status($result) == PGSQL_COMMAND_OK)
-			return true;
-			
-		$r = array();
-		if(pg_num_rows($result)) {
-			while($x = pg_fetch_array($result, null, PGSQL_ASSOC))
-				$r[] = $x;
-			pg_free_result($result);
-			if($this->debug)
-				db_logger('dba_postgres: ' . printable(print_r($r,true)));
-		}
-		return $r;
-	}
-	
-	function escape($str) {
-		if($this->db && $this->connected) {
-			$x = @pg_escape_string($this->db, $str);
-			return $x;
-		}
-	}
-	
-	function escapebin($str) {
-		return pg_escape_bytea($str);
-	}
-	
-	function unescapebin($str) {
-		return pg_unescape_bytea($str);
-	}
-	
-	function close() {
-		if($this->db)
-			pg_close($this->db);
-		$this->connected = false;
-	}
-	
-	function quote_interval($txt) {
-		return "'$txt'";
-	}
-	
-	function escape_identifier($str) {
-		return pg_escape_identifier($this->db, $str);
-	}
-	
-	function optimize_table($table) {
-		// perhaps do some equivalent thing here, vacuum, etc? I think this is the DBA's domain anyway. Applications should not need to muss with this.
-		// for now do nothing without a compelling reason. function overrides default legacy mysql.
-	}
-	
-	function concat($fld, $sep) {
-		return 'string_agg(' . $fld . ',\'' . $sep . '\')';
-	}
-	
-	function getdriver() {
-		return 'pgsql';
-	}
-}
\ No newline at end of file