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Diffstat (limited to 'lib/phpFlickr/PEAR/DB/storage.php')
-rw-r--r-- | lib/phpFlickr/PEAR/DB/storage.php | 504 |
1 files changed, 0 insertions, 504 deletions
diff --git a/lib/phpFlickr/PEAR/DB/storage.php b/lib/phpFlickr/PEAR/DB/storage.php deleted file mode 100644 index f597b36d7..000000000 --- a/lib/phpFlickr/PEAR/DB/storage.php +++ /dev/null @@ -1,504 +0,0 @@ -<?php - -/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ - -/** - * Provides an object interface to a table row - * - * PHP versions 4 and 5 - * - * LICENSE: This source file is subject to version 3.0 of the PHP license - * that is available through the world-wide-web at the following URI: - * http://www.php.net/license/3_0.txt. If you did not receive a copy of - * the PHP License and are unable to obtain it through the web, please - * send a note to license@php.net so we can mail you a copy immediately. - * - * @category Database - * @package DB - * @author Stig Bakken <stig@php.net> - * @copyright 1997-2005 The PHP Group - * @license http://www.php.net/license/3_0.txt PHP License 3.0 - * @version CVS: $Id: storage.php 32 2005-08-01 06:21:02Z dancoulter $ - * @link http://pear.php.net/package/DB - */ - -/** - * Obtain the DB class so it can be extended from - */ -require_once 'DB.php'; - -/** - * Provides an object interface to a table row - * - * It lets you add, delete and change rows using objects rather than SQL - * statements. - * - * @category Database - * @package DB - * @author Stig Bakken <stig@php.net> - * @copyright 1997-2005 The PHP Group - * @license http://www.php.net/license/3_0.txt PHP License 3.0 - * @version Release: @package_version@ - * @link http://pear.php.net/package/DB - */ -class DB_storage extends PEAR -{ - // {{{ properties - - /** the name of the table (or view, if the backend database supports - updates in views) we hold data from */ - var $_table = null; - - /** which column(s) in the table contains primary keys, can be a - string for single-column primary keys, or an array of strings - for multiple-column primary keys */ - var $_keycolumn = null; - - /** DB connection handle used for all transactions */ - var $_dbh = null; - - /** an assoc with the names of database fields stored as properties - in this object */ - var $_properties = array(); - - /** an assoc with the names of the properties in this object that - have been changed since they were fetched from the database */ - var $_changes = array(); - - /** flag that decides if data in this object can be changed. - objects that don't have their table's key column in their - property lists will be flagged as read-only. */ - var $_readonly = false; - - /** function or method that implements a validator for fields that - are set, this validator function returns true if the field is - valid, false if not */ - var $_validator = null; - - // }}} - // {{{ constructor - - /** - * Constructor - * - * @param $table string the name of the database table - * - * @param $keycolumn mixed string with name of key column, or array of - * strings if the table has a primary key of more than one column - * - * @param $dbh object database connection object - * - * @param $validator mixed function or method used to validate - * each new value, called with three parameters: the name of the - * field/column that is changing, a reference to the new value and - * a reference to this object - * - */ - function DB_storage($table, $keycolumn, &$dbh, $validator = null) - { - $this->PEAR('DB_Error'); - $this->_table = $table; - $this->_keycolumn = $keycolumn; - $this->_dbh = $dbh; - $this->_readonly = false; - $this->_validator = $validator; - } - - // }}} - // {{{ _makeWhere() - - /** - * Utility method to build a "WHERE" clause to locate ourselves in - * the table. - * - * XXX future improvement: use rowids? - * - * @access private - */ - function _makeWhere($keyval = null) - { - if (is_array($this->_keycolumn)) { - if ($keyval === null) { - for ($i = 0; $i < sizeof($this->_keycolumn); $i++) { - $keyval[] = $this->{$this->_keycolumn[$i]}; - } - } - $whereclause = ''; - for ($i = 0; $i < sizeof($this->_keycolumn); $i++) { - if ($i > 0) { - $whereclause .= ' AND '; - } - $whereclause .= $this->_keycolumn[$i]; - if (is_null($keyval[$i])) { - // there's not much point in having a NULL key, - // but we support it anyway - $whereclause .= ' IS NULL'; - } else { - $whereclause .= ' = ' . $this->_dbh->quote($keyval[$i]); - } - } - } else { - if ($keyval === null) { - $keyval = @$this->{$this->_keycolumn}; - } - $whereclause = $this->_keycolumn; - if (is_null($keyval)) { - // there's not much point in having a NULL key, - // but we support it anyway - $whereclause .= ' IS NULL'; - } else { - $whereclause .= ' = ' . $this->_dbh->quote($keyval); - } - } - return $whereclause; - } - - // }}} - // {{{ setup() - - /** - * Method used to initialize a DB_storage object from the - * configured table. - * - * @param $keyval mixed the key[s] of the row to fetch (string or array) - * - * @return int DB_OK on success, a DB error if not - */ - function setup($keyval) - { - $whereclause = $this->_makeWhere($keyval); - $query = 'SELECT * FROM ' . $this->_table . ' WHERE ' . $whereclause; - $sth = $this->_dbh->query($query); - if (DB::isError($sth)) { - return $sth; - } - $row = $sth->fetchRow(DB_FETCHMODE_ASSOC); - if (DB::isError($row)) { - return $row; - } - if (!$row) { - return $this->raiseError(null, DB_ERROR_NOT_FOUND, null, null, - $query, null, true); - } - foreach ($row as $key => $value) { - $this->_properties[$key] = true; - $this->$key = $value; - } - return DB_OK; - } - - // }}} - // {{{ insert() - - /** - * Create a new (empty) row in the configured table for this - * object. - */ - function insert($newpk) - { - if (is_array($this->_keycolumn)) { - $primarykey = $this->_keycolumn; - } else { - $primarykey = array($this->_keycolumn); - } - settype($newpk, "array"); - for ($i = 0; $i < sizeof($primarykey); $i++) { - $pkvals[] = $this->_dbh->quote($newpk[$i]); - } - - $sth = $this->_dbh->query("INSERT INTO $this->_table (" . - implode(",", $primarykey) . ") VALUES(" . - implode(",", $pkvals) . ")"); - if (DB::isError($sth)) { - return $sth; - } - if (sizeof($newpk) == 1) { - $newpk = $newpk[0]; - } - $this->setup($newpk); - } - - // }}} - // {{{ toString() - - /** - * Output a simple description of this DB_storage object. - * @return string object description - */ - function toString() - { - $info = strtolower(get_class($this)); - $info .= " (table="; - $info .= $this->_table; - $info .= ", keycolumn="; - if (is_array($this->_keycolumn)) { - $info .= "(" . implode(",", $this->_keycolumn) . ")"; - } else { - $info .= $this->_keycolumn; - } - $info .= ", dbh="; - if (is_object($this->_dbh)) { - $info .= $this->_dbh->toString(); - } else { - $info .= "null"; - } - $info .= ")"; - if (sizeof($this->_properties)) { - $info .= " [loaded, key="; - $keyname = $this->_keycolumn; - if (is_array($keyname)) { - $info .= "("; - for ($i = 0; $i < sizeof($keyname); $i++) { - if ($i > 0) { - $info .= ","; - } - $info .= $this->$keyname[$i]; - } - $info .= ")"; - } else { - $info .= $this->$keyname; - } - $info .= "]"; - } - if (sizeof($this->_changes)) { - $info .= " [modified]"; - } - return $info; - } - - // }}} - // {{{ dump() - - /** - * Dump the contents of this object to "standard output". - */ - function dump() - { - foreach ($this->_properties as $prop => $foo) { - print "$prop = "; - print htmlentities($this->$prop); - print "<br />\n"; - } - } - - // }}} - // {{{ &create() - - /** - * Static method used to create new DB storage objects. - * @param $data assoc. array where the keys are the names - * of properties/columns - * @return object a new instance of DB_storage or a subclass of it - */ - function &create($table, &$data) - { - $classname = strtolower(get_class($this)); - $obj =& new $classname($table); - foreach ($data as $name => $value) { - $obj->_properties[$name] = true; - $obj->$name = &$value; - } - return $obj; - } - - // }}} - // {{{ loadFromQuery() - - /** - * Loads data into this object from the given query. If this - * object already contains table data, changes will be saved and - * the object re-initialized first. - * - * @param $query SQL query - * - * @param $params parameter list in case you want to use - * prepare/execute mode - * - * @return int DB_OK on success, DB_WARNING_READ_ONLY if the - * returned object is read-only (because the object's specified - * key column was not found among the columns returned by $query), - * or another DB error code in case of errors. - */ -// XXX commented out for now -/* - function loadFromQuery($query, $params = null) - { - if (sizeof($this->_properties)) { - if (sizeof($this->_changes)) { - $this->store(); - $this->_changes = array(); - } - $this->_properties = array(); - } - $rowdata = $this->_dbh->getRow($query, DB_FETCHMODE_ASSOC, $params); - if (DB::isError($rowdata)) { - return $rowdata; - } - reset($rowdata); - $found_keycolumn = false; - while (list($key, $value) = each($rowdata)) { - if ($key == $this->_keycolumn) { - $found_keycolumn = true; - } - $this->_properties[$key] = true; - $this->$key = &$value; - unset($value); // have to unset, or all properties will - // refer to the same value - } - if (!$found_keycolumn) { - $this->_readonly = true; - return DB_WARNING_READ_ONLY; - } - return DB_OK; - } - */ - - // }}} - // {{{ set() - - /** - * Modify an attriute value. - */ - function set($property, $newvalue) - { - // only change if $property is known and object is not - // read-only - if ($this->_readonly) { - return $this->raiseError(null, DB_WARNING_READ_ONLY, null, - null, null, null, true); - } - if (@isset($this->_properties[$property])) { - if (empty($this->_validator)) { - $valid = true; - } else { - $valid = @call_user_func($this->_validator, - $this->_table, - $property, - $newvalue, - $this->$property, - $this); - } - if ($valid) { - $this->$property = $newvalue; - if (empty($this->_changes[$property])) { - $this->_changes[$property] = 0; - } else { - $this->_changes[$property]++; - } - } else { - return $this->raiseError(null, DB_ERROR_INVALID, null, - null, "invalid field: $property", - null, true); - } - return true; - } - return $this->raiseError(null, DB_ERROR_NOSUCHFIELD, null, - null, "unknown field: $property", - null, true); - } - - // }}} - // {{{ &get() - - /** - * Fetch an attribute value. - * - * @param string attribute name - * - * @return attribute contents, or null if the attribute name is - * unknown - */ - function &get($property) - { - // only return if $property is known - if (isset($this->_properties[$property])) { - return $this->$property; - } - $tmp = null; - return $tmp; - } - - // }}} - // {{{ _DB_storage() - - /** - * Destructor, calls DB_storage::store() if there are changes - * that are to be kept. - */ - function _DB_storage() - { - if (sizeof($this->_changes)) { - $this->store(); - } - $this->_properties = array(); - $this->_changes = array(); - $this->_table = null; - } - - // }}} - // {{{ store() - - /** - * Stores changes to this object in the database. - * - * @return DB_OK or a DB error - */ - function store() - { - foreach ($this->_changes as $name => $foo) { - $params[] = &$this->$name; - $vars[] = $name . ' = ?'; - } - if ($vars) { - $query = 'UPDATE ' . $this->_table . ' SET ' . - implode(', ', $vars) . ' WHERE ' . - $this->_makeWhere(); - $stmt = $this->_dbh->prepare($query); - $res = $this->_dbh->execute($stmt, $params); - if (DB::isError($res)) { - return $res; - } - $this->_changes = array(); - } - return DB_OK; - } - - // }}} - // {{{ remove() - - /** - * Remove the row represented by this object from the database. - * - * @return mixed DB_OK or a DB error - */ - function remove() - { - if ($this->_readonly) { - return $this->raiseError(null, DB_WARNING_READ_ONLY, null, - null, null, null, true); - } - $query = 'DELETE FROM ' . $this->_table .' WHERE '. - $this->_makeWhere(); - $res = $this->_dbh->query($query); - if (DB::isError($res)) { - return $res; - } - foreach ($this->_properties as $prop => $foo) { - unset($this->$prop); - } - $this->_properties = array(); - $this->_changes = array(); - return DB_OK; - } - - // }}} -} - -/* - * Local variables: - * tab-width: 4 - * c-basic-offset: 4 - * End: - */ - -?> |