]> scripts.mit.edu Git - autoinstalls/mediawiki.git/blobdiff - includes/api/ApiBase.php
MediaWiki 1.17.0
[autoinstalls/mediawiki.git] / includes / api / ApiBase.php
index 708a3a405869feea7f311978134c5db288b91405..175fa6a1505e2508a9a1df6fdab645b0c0a5713d 100644 (file)
@@ -1,10 +1,9 @@
 <?php
-
 /**
- * Created on Sep 5, 2006
- *
  * API for MediaWiki 1.8+
  *
+ * Created on Sep 5, 2006
+ *
  * Copyright © 2006, 2010 Yuri Astrakhan <Firstname><Lastname>@gmail.com
  *
  * This program is free software; you can redistribute it and/or modify
  *
  * You should have received a copy of the GNU General Public License along
  * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
  */
 
 /**
@@ -50,6 +51,8 @@ abstract class ApiBase {
        const PARAM_MIN = 5; // Lowest value allowed for a parameter. Only applies if TYPE='integer'
        const PARAM_ALLOW_DUPLICATES = 6; // Boolean, do we allow the same value to be set more than once when ISMULTI=true
        const PARAM_DEPRECATED = 7; // Boolean, is the parameter deprecated (will show a warning)
+       const PARAM_REQUIRED = 8; // Boolean, is the parameter required?
+       const PARAM_RANGE_ENFORCE = 9; // Boolean, if MIN/MAX are set, enforce (die) these? Only applies if TYPE='integer' Use with extreme caution
 
        const LIMIT_BIG1 = 500; // Fast query, std user limit
        const LIMIT_BIG2 = 5000; // Fast query, bot/sysop limit
@@ -179,8 +182,7 @@ abstract class ApiBase {
                if ( isset( $data['warnings'][$this->getModuleName()] ) ) {
                        // Don't add duplicate warnings
                        $warn_regex = preg_quote( $warning, '/' );
-                       if ( preg_match( "/{$warn_regex}(\\n|$)/", $data['warnings'][$this->getModuleName()]['*'] ) )
-                       {
+                       if ( preg_match( "/{$warn_regex}(\\n|$)/", $data['warnings'][$this->getModuleName()]['*'] ) ) {
                                return;
                        }
                        $oldwarning = $data['warnings'][$this->getModuleName()]['*'];
@@ -224,13 +226,13 @@ abstract class ApiBase {
                        $msg = $lnPrfx . implode( $lnPrfx, $msg ) . "\n";
 
                        if ( $this->isReadMode() ) {
-                               $msg .= "\nThis module requires read rights.";
+                               $msg .= "\nThis module requires read rights";
                        }
                        if ( $this->isWriteMode() ) {
-                               $msg .= "\nThis module requires write rights.";
+                               $msg .= "\nThis module requires write rights";
                        }
                        if ( $this->mustBePosted() ) {
-                               $msg .= "\nThis module only accepts POST requests.";
+                               $msg .= "\nThis module only accepts POST requests";
                        }
                        if ( $this->isReadMode() || $this->isWriteMode() ||
                                        $this->mustBePosted() )
@@ -252,8 +254,11 @@ abstract class ApiBase {
                                                $examples
                                        );
                                }
-                               $msg .= 'Example' . ( count( $examples ) > 1 ? 's' : '' ) . ":\n  ";
-                               $msg .= implode( $lnPrfx, $examples ) . "\n";
+
+                               if ( count( $examples ) > 0 ) {
+                                       $msg .= 'Example' . ( count( $examples ) > 1 ? 's' : '' ) . ":\n  ";
+                                       $msg .= implode( $lnPrfx, $examples ) . "\n";
+                               }
                        }
 
                        if ( $this->getMain()->getShowVersions() ) {
@@ -295,12 +300,24 @@ abstract class ApiBase {
                                        $desc = implode( $paramPrefix, $desc );
                                }
 
+                               if ( !is_array( $paramSettings ) ) {
+                                       $paramSettings = array(
+                                               self::PARAM_DFLT => $paramSettings,
+                                       );
+                               }
+
                                $deprecated = isset( $paramSettings[self::PARAM_DEPRECATED] ) ?
                                        $paramSettings[self::PARAM_DEPRECATED] : false;
                                if ( $deprecated ) {
                                        $desc = "DEPRECATED! $desc";
                                }
 
+                               $required = isset( $paramSettings[self::PARAM_REQUIRED] ) ?
+                                       $paramSettings[self::PARAM_REQUIRED] : false;
+                               if ( $required ) {
+                                       $desc .= $paramPrefix . "This parameter is required";
+                               }
+
                                $type = isset( $paramSettings[self::PARAM_TYPE] ) ? $paramSettings[self::PARAM_TYPE] : null;
                                if ( isset( $type ) ) {
                                        if ( isset( $paramSettings[self::PARAM_ISMULTI] ) ) {
@@ -312,21 +329,26 @@ abstract class ApiBase {
                                        if ( is_array( $type ) ) {
                                                $choices = array();
                                                $nothingPrompt = false;
-                                               foreach ( $type as $t )
+                                               foreach ( $type as $t ) {
                                                        if ( $t === '' ) {
                                                                $nothingPrompt = 'Can be empty, or ';
                                                        } else {
                                                                $choices[] =  $t;
                                                        }
+                                               }
                                                $desc .= $paramPrefix . $nothingPrompt . $prompt . implode( ', ', $choices );
                                        } else {
                                                switch ( $type ) {
                                                        case 'namespace':
                                                                // Special handling because namespaces are type-limited, yet they are not given
-                                                               $desc .= $paramPrefix . $prompt . implode( ', ', ApiBase::getValidNamespaces() );
+                                                               $desc .= $paramPrefix . $prompt . implode( ', ', MWNamespace::getValidNamespaces() );
                                                                break;
                                                        case 'limit':
-                                                               $desc .= $paramPrefix . "No more than {$paramSettings[self :: PARAM_MAX]} ({$paramSettings[self::PARAM_MAX2]} for bots) allowed.";
+                                                               $desc .= $paramPrefix . "No more than {$paramSettings[self :: PARAM_MAX]}";
+                                                               if ( isset( $paramSettings[self::PARAM_MAX2] ) ) {
+                                                                       $desc .= " ({$paramSettings[self::PARAM_MAX2]} for bots)";
+                                                               }
+                                                               $desc .= ' allowed';
                                                                break;
                                                        case 'integer':
                                                                $hasMin = isset( $paramSettings[self::PARAM_MIN] );
@@ -344,10 +366,22 @@ abstract class ApiBase {
                                                                }
                                                                break;
                                                }
+
+                                               if ( isset( $paramSettings[self::PARAM_ISMULTI] ) ) {
+                                                       $isArray = is_array( $paramSettings[self::PARAM_TYPE] );
+
+                                                       if ( !$isArray
+                                                                       || $isArray && count( $paramSettings[self::PARAM_TYPE] ) > self::LIMIT_SML1) {
+                                                               $desc .= $paramPrefix . "Maximum number of values " .
+                                                                       self::LIMIT_SML1 . " (" . self::LIMIT_SML2 . " for bots)";
+                                                       }
+                                               }
                                        }
                                }
 
-                               $default = is_array( $paramSettings ) ? ( isset( $paramSettings[self::PARAM_DFLT] ) ? $paramSettings[self::PARAM_DFLT] : null ) : $paramSettings;
+                               $default = is_array( $paramSettings )
+                                               ? ( isset( $paramSettings[self::PARAM_DFLT] ) ? $paramSettings[self::PARAM_DFLT] : null )
+                                               : $paramSettings;
                                if ( !is_null( $default ) && $default !== false ) {
                                        $desc .= $paramPrefix . "Default: $default";
                                }
@@ -480,7 +514,7 @@ abstract class ApiBase {
 
                        if ( $params ) { // getFinalParams() can return false
                                foreach ( $params as $paramName => $paramSettings ) {
-                                       $results[$paramName] = $this->getParameterFromSettings( 
+                                       $results[$paramName] = $this->getParameterFromSettings(
                                                $paramName, $paramSettings, $parseLimit );
                                }
                        }
@@ -510,8 +544,8 @@ abstract class ApiBase {
                array_shift( $required );
 
                $intersection = array_intersect( array_keys( array_filter( $params,
-                               create_function( '$x', 'return !is_null($x) && $x !== false;' )
-                       ) ), $required );
+                               array( $this, "parameterNotEmpty" ) ) ), $required );
+
                if ( count( $intersection ) > 1 ) {
                        $this->dieUsage( 'The parameters ' . implode( ', ', $intersection ) . ' can not be used together', 'invalidparammix' );
                } elseif ( count( $intersection ) == 0 ) {
@@ -520,24 +554,81 @@ abstract class ApiBase {
        }
 
        /**
-        * Returns an array of the namespaces (by integer id) that exist on the
-        * wiki. Used primarily in help documentation.
-        * @return array
+        * Callback function used in requireOnlyOneParameter to check whether reequired parameters are set
+        *
+        * @param  $x object Parameter to check is not null/false
+        * @return bool
+        */
+       private function parameterNotEmpty( $x ) {
+               return !is_null( $x ) && $x !== false;
+       }
+
+       /**
+        * @deprecated use MWNamespace::getValidNamespaces()
         */
        public static function getValidNamespaces() {
-               static $mValidNamespaces = null;
-
-               if ( is_null( $mValidNamespaces ) ) {
-                       global $wgContLang;
-                       $mValidNamespaces = array();
-                       foreach ( array_keys( $wgContLang->getNamespaces() ) as $ns ) {
-                               if ( $ns >= 0 ) {
-                                       $mValidNamespaces[] = $ns;
+               return MWNamespace::getValidNamespaces();
+       }
+
+       /**
+        * Return true if we're to watch the page, false if not, null if no change.
+        * @param $watchlist String Valid values: 'watch', 'unwatch', 'preferences', 'nochange'
+        * @param $titleObj Title the page under consideration
+        * @param $userOption String The user option to consider when $watchlist=preferences.
+        *      If not set will magically default to either watchdefault or watchcreations
+        * @returns Boolean
+        */
+       protected function getWatchlistValue ( $watchlist, $titleObj, $userOption = null ) {
+
+               $userWatching = $titleObj->userIsWatching();
+
+               global $wgUser;
+               switch ( $watchlist ) {
+                       case 'watch':
+                               return true;
+
+                       case 'unwatch':
+                               return false;
+
+                       case 'preferences':
+                               # If the user is already watching, don't bother checking
+                               if ( $userWatching ) {
+                                       return true;
                                }
-                       }
+                               # If no user option was passed, use watchdefault or watchcreation
+                               if ( is_null( $userOption ) ) {
+                                       $userOption = $titleObj->exists()
+                                               ? 'watchdefault' : 'watchcreations';
+                               }
+                               # Watch the article based on the user preference
+                               return (bool)$wgUser->getOption( $userOption );
+
+                       case 'nochange':
+                               return $userWatching;
+
+                       default:
+                               return $userWatching;
                }
+       }
 
-               return $mValidNamespaces;
+       /**
+        * Set a watch (or unwatch) based the based on a watchlist parameter.
+        * @param $watch String Valid values: 'watch', 'unwatch', 'preferences', 'nochange'
+        * @param $titleObj Title the article's title to change
+        * @param $userOption String The user option to consider when $watch=preferences
+        */
+       protected function setWatch ( $watch, $titleObj, $userOption = null ) {
+               $value = $this->getWatchlistValue( $watch, $titleObj, $userOption );
+               if ( $value === null ) {
+                       return;
+               }
+
+               $articleObj = new Article( $titleObj );
+               if ( $value ) {
+                       $articleObj->doWatch();
+               } else {
+                       $articleObj->doUnwatch();
+               }
        }
 
        /**
@@ -559,12 +650,14 @@ abstract class ApiBase {
                        $type = gettype( $paramSettings );
                        $dupes = false;
                        $deprecated = false;
+                       $required = false;
                } else {
                        $default = isset( $paramSettings[self::PARAM_DFLT] ) ? $paramSettings[self::PARAM_DFLT] : null;
                        $multi = isset( $paramSettings[self::PARAM_ISMULTI] ) ? $paramSettings[self::PARAM_ISMULTI] : false;
                        $type = isset( $paramSettings[self::PARAM_TYPE] ) ? $paramSettings[self::PARAM_TYPE] : null;
                        $dupes = isset( $paramSettings[self::PARAM_ALLOW_DUPLICATES] ) ? $paramSettings[self::PARAM_ALLOW_DUPLICATES] : false;
                        $deprecated = isset( $paramSettings[self::PARAM_DEPRECATED] ) ? $paramSettings[self::PARAM_DEPRECATED] : false;
+                       $required = isset( $paramSettings[self::PARAM_REQUIRED] ) ? $paramSettings[self::PARAM_REQUIRED] : false;
 
                        // When type is not given, and no choices, the type is the same as $default
                        if ( !isset( $type ) ) {
@@ -587,7 +680,7 @@ abstract class ApiBase {
                        $value = $this->getMain()->getRequest()->getVal( $encParamName, $default );
 
                        if ( isset( $value ) && $type == 'namespace' ) {
-                               $type = ApiBase::getValidNamespaces();
+                               $type = MWNamespace::getValidNamespaces();
                        }
                }
 
@@ -602,19 +695,28 @@ abstract class ApiBase {
                                switch ( $type ) {
                                        case 'NULL': // nothing to do
                                                break;
-                                       case 'string': // nothing to do
+                                       case 'string':
+                                               if ( $required && $value === '' ) {
+                                                       $this->dieUsageMsg( array( 'missingparam', $paramName ) );
+                                               }
+
                                                break;
                                        case 'integer': // Force everything using intval() and optionally validate limits
-
-                                               $value = is_array( $value ) ? array_map( 'intval', $value ) : intval( $value );
                                                $min = isset ( $paramSettings[self::PARAM_MIN] ) ? $paramSettings[self::PARAM_MIN] : null;
                                                $max = isset ( $paramSettings[self::PARAM_MAX] ) ? $paramSettings[self::PARAM_MAX] : null;
+                                               $enforceLimits = isset ( $paramSettings[self::PARAM_RANGE_ENFORCE] )
+                                                               ? $paramSettings[self::PARAM_RANGE_ENFORCE] : false;
 
                                                if ( !is_null( $min ) || !is_null( $max ) ) {
-                                                       $values = is_array( $value ) ? $value : array( $value );
-                                                       foreach ( $values as &$v ) {
-                                                               $this->validateLimit( $paramName, $v, $min, $max );
-                                                       }
+                                                   if ( is_array( $value ) ) {
+                                                           $value = array_map( 'intval', $value );
+                                                           foreach ( $value as &$v ) {
+                                                                       $this->validateLimit( $paramName, $v, $min, $max, null, $enforceLimits );
+                                                               }
+                                                   } else {
+                                                           $value = intval( $value );
+                                                           $this->validateLimit( $paramName, $value, $min, $max, null, $enforceLimits );
+                                                   }
                                                }
                                                break;
                                        case 'limit':
@@ -631,15 +733,16 @@ abstract class ApiBase {
                                                $min = isset( $paramSettings[self::PARAM_MIN] ) ? $paramSettings[self::PARAM_MIN] : 0;
                                                if ( $value == 'max' ) {
                                                        $value = $this->getMain()->canApiHighLimits() ? $paramSettings[self::PARAM_MAX2] : $paramSettings[self::PARAM_MAX];
-                                                       $this->getResult()->addValue( 'limits', $this->getModuleName(), $value );
+                                                       $this->getResult()->setParsedLimit( $this->getModuleName(), $value );
                                                } else {
                                                        $value = intval( $value );
                                                        $this->validateLimit( $paramName, $value, $min, $paramSettings[self::PARAM_MAX], $paramSettings[self::PARAM_MAX2] );
                                                }
                                                break;
                                        case 'boolean':
-                                               if ( $multi )
+                                               if ( $multi ) {
                                                        ApiBase::dieDebug( __METHOD__, "Multi-values not supported for $encParamName" );
+                                               }
                                                break;
                                        case 'timestamp':
                                                if ( $multi ) {
@@ -652,11 +755,21 @@ abstract class ApiBase {
                                                $value = wfTimestamp( TS_MW, $value );
                                                break;
                                        case 'user':
-                                               $title = Title::makeTitleSafe( NS_USER, $value );
-                                               if ( is_null( $title ) ) {
-                                                       $this->dieUsage( "Invalid value for user parameter $encParamName", "baduser_{$encParamName}" );
+                                               if ( !is_array( $value ) ) {
+                                                       $value = array( $value );
+                                               }
+
+                                               foreach ( $value as $key => $val ) {
+                                                       $title = Title::makeTitleSafe( NS_USER, $val );
+                                                       if ( is_null( $title ) ) {
+                                                               $this->dieUsage( "Invalid value for user parameter $encParamName", "baduser_{$encParamName}" );
+                                                       }
+                                                       $value[$key] = $title->getText();
+                                               }
+
+                                               if ( !$multi ) {
+                                                       $value = $value[0];
                                                }
-                                               $value = $title->getText();
                                                break;
                                        default:
                                                ApiBase::dieDebug( __METHOD__, "Param $encParamName's type is unknown - $type" );
@@ -672,6 +785,8 @@ abstract class ApiBase {
                        if ( $deprecated && $value !== false ) {
                                $this->setWarning( "The $encParamName parameter has been deprecated." );
                        }
+               } else if ( $required ) {
+                       $this->dieUsageMsg( array( 'missingparam', $paramName ) );
                }
 
                return $value;
@@ -736,10 +851,13 @@ abstract class ApiBase {
         * @param $min int Minimum value
         * @param $max int Maximum value for users
         * @param $botMax int Maximum value for sysops/bots
+        * @param $enforceLimits Boolean Whether to enforce (die) if value is outside limits
         */
-       function validateLimit( $paramName, &$value, $min, $max, $botMax = null ) {
+       function validateLimit( $paramName, &$value, $min, $max, $botMax = null, $enforceLimits = false ) {
                if ( !is_null( $min ) && $value < $min ) {
-                       $this->setWarning( $this->encodeParamName( $paramName ) . " may not be less than $min (set to $value)" );
+
+                       $msg = $this->encodeParamName( $paramName ) . " may not be less than $min (set to $value)";
+                       $this->warnOrDie( $msg, $enforceLimits );
                        $value = $min;
                }
 
@@ -753,16 +871,32 @@ abstract class ApiBase {
                if ( !is_null( $max ) && $value > $max ) {
                        if ( !is_null( $botMax ) && $this->getMain()->canApiHighLimits() ) {
                                if ( $value > $botMax ) {
-                                       $this->setWarning( $this->encodeParamName( $paramName ) . " may not be over $botMax (set to $value) for bots or sysops" );
+                                       $msg = $this->encodeParamName( $paramName ) . " may not be over $botMax (set to $value) for bots or sysops";
+                                       $this->warnOrDie( $msg, $enforceLimits );
                                        $value = $botMax;
                                }
                        } else {
-                               $this->setWarning( $this->encodeParamName( $paramName ) . " may not be over $max (set to $value) for users" );
+                               $msg = $this->encodeParamName( $paramName ) . " may not be over $max (set to $value) for users";
+                               $this->warnOrDie( $msg, $enforceLimits );
                                $value = $max;
                        }
                }
        }
 
+       /**
+        * Adds a warning to the output, else dies
+        *
+        * @param  $msg String Message to show as a warning, or error message if dying
+        * @param  $enforceLimits Boolean Whether this is an enforce (die)
+        */
+       private function warnOrDie( $msg, $enforceLimits = false ) {
+               if ( $enforceLimits ) {
+                       $this->dieUsage( $msg, 'integeroutofrange' );
+               } else {
+                       $this->setWarning( $msg );
+               }
+       }
+
        /**
         * Truncate an array to a certain length.
         * @param $arr array Array to truncate
@@ -772,7 +906,7 @@ abstract class ApiBase {
        public static function truncateArray( &$arr, $limit ) {
                $modified = false;
                while ( count( $arr ) > $limit ) {
-                       $junk = array_pop( $arr );
+                       array_pop( $arr );
                        $modified = true;
                }
                return $modified;
@@ -848,6 +982,8 @@ abstract class ApiBase {
                'ipb_blocked_as_range' => array( 'code' => 'blockedasrange', 'info' => "IP address ``\$1'' was blocked as part of range ``\$2''. You can't unblock the IP invidually, but you can unblock the range as a whole." ),
                'ipb_cant_unblock' => array( 'code' => 'cantunblock', 'info' => "The block you specified was not found. It may have been unblocked already" ),
                'mailnologin' => array( 'code' => 'cantsend', 'info' => "You are not logged in, you do not have a confirmed e-mail address, or you are not allowed to send e-mail to other users, so you cannot send e-mail" ),
+               'ipbblocked' => array( 'code' => 'ipbblocked', 'info' => 'You cannot block or unblock users while you are yourself blocked' ),
+               'ipbnounblockself' => array( 'code' => 'ipbnounblockself', 'info' => 'You are not allowed to unblock yourself' ),
                'usermaildisabled' => array( 'code' => 'usermaildisabled', 'info' => "User email has been disabled" ),
                'blockedemailuser' => array( 'code' => 'blockedfrommail', 'info' => "You have been blocked from sending e-mail" ),
                'notarget' => array( 'code' => 'notarget', 'info' => "You have not specified a valid target for this action" ),
@@ -860,6 +996,7 @@ abstract class ApiBase {
                'userrights-nodatabase' => array( 'code' => 'nosuchdatabase', 'info' => "Database ``\$1'' does not exist or is not local" ),
                'nouserspecified' => array( 'code' => 'invaliduser', 'info' => "Invalid username ``\$1''" ),
                'noname' => array( 'code' => 'invaliduser', 'info' => "Invalid username ``\$1''" ),
+               'summaryrequired' => array( 'code' => 'summaryrequired', 'info' => 'Summary required' ),
 
                // API-specific messages
                'readrequired' => array( 'code' => 'readapidenied', 'info' => "You need read permission to use this module" ),
@@ -886,7 +1023,6 @@ abstract class ApiBase {
                'createonly-exists' => array( 'code' => 'articleexists', 'info' => "The article you tried to create has been created already" ),
                'nocreate-missing' => array( 'code' => 'missingtitle', 'info' => "The article you tried to edit doesn't exist" ),
                'nosuchrcid' => array( 'code' => 'nosuchrcid', 'info' => "There is no change with rcid ``\$1''" ),
-               'cantpurge' => array( 'code' => 'cantpurge', 'info' => "Only users with the 'purge' right can purge pages via the API" ),
                'protect-invalidaction' => array( 'code' => 'protect-invalidaction', 'info' => "Invalid protection type ``\$1''" ),
                'protect-invalidlevel' => array( 'code' => 'protect-invalidlevel', 'info' => "Invalid protection level ``\$1''" ),
                'toofewexpiries' => array( 'code' => 'toofewexpiries', 'info' => "\$1 expiry timestamps were provided where \$2 were needed" ),
@@ -927,6 +1063,7 @@ abstract class ApiBase {
                'invalid-session-key' => array( 'code' => 'invalid-session-key', 'info' => 'Not a valid session key' ),
                'nouploadmodule' => array( 'code' => 'nouploadmodule', 'info' => 'No upload module set' ),
                'uploaddisabled' => array( 'code' => 'uploaddisabled', 'info' => 'Uploads are not enabled.  Make sure $wgEnableUploads is set to true in LocalSettings.php and the PHP ini setting file_uploads is true' ),
+               'copyuploaddisabled' => array( 'code' => 'copyuploaddisabled', 'info' => 'Uploads by URL is not enabled.  Make sure $wgAllowCopyUploads is set to true in LocalSettings.php.' ),
        );
 
        /**
@@ -1021,6 +1158,31 @@ abstract class ApiBase {
                return false;
        }
 
+       /**
+       * Gets the user for whom to get the watchlist
+       *
+       * @returns User
+       */
+       public function getWatchlistUser( $params ) {
+               global $wgUser;
+               if ( !is_null( $params['owner'] ) && !is_null( $params['token'] ) ) {
+                       $user = User::newFromName( $params['owner'], false );
+                       if ( !$user->getId() ) {
+                               $this->dieUsage( 'Specified user does not exist', 'bad_wlowner' );
+                       }
+                       $token = $user->getOption( 'watchlisttoken' );
+                       if ( $token == '' || $token != $params['token'] ) {
+                               $this->dieUsage( 'Incorrect watchlist token provided -- please set a correct token in Special:Preferences', 'bad_wltoken' );
+                       }
+               } else {
+                       if ( !$wgUser->isLoggedIn() ) {
+                               $this->dieUsage( 'You must be logged-in to have a watchlist', 'notloggedin' );
+                       }
+                       $user = $wgUser;
+               }
+               return $user;
+       }
+
        /**
         * Returns a list of all possible errors returned by the module
         * @return array in the format of array( key, param1, param2, ... ) or array( 'code' => ..., 'info' => ... )
@@ -1028,6 +1190,15 @@ abstract class ApiBase {
        public function getPossibleErrors() {
                $ret = array();
 
+               $params = $this->getFinalParams();
+               if ( $params ) {
+                       foreach ( $params as $paramName => $paramSettings ) {
+                               if ( isset( $paramSettings[ApiBase::PARAM_REQUIRED] ) ) {
+                                       $ret[] = array( 'missingparam', $paramName );
+                               }
+                       }
+               }
+
                if ( $this->mustBePosted() ) {
                        $ret[] = array( 'mustbeposted', $this->getModuleName() );
                }
@@ -1192,6 +1363,6 @@ abstract class ApiBase {
         * @return string
         */
        public static function getBaseVersion() {
-               return __CLASS__ . ': $Id: ApiBase.php 79562 2011-01-04 06:15:54Z tstarling $';
+               return __CLASS__ . ': $Id: ApiBase.php 82730 2011-02-24 16:03:05Z reedy $';
        }
 }