Merge "DatabaseMssql: Don't duplicate body of makeList()"

[mediawiki.git] / includes / ProtectionForm.php

<?php
/**
 * Page protection
 *
 * Copyright © 2005 Brion Vibber <brion@pobox.com>
 * https://www.mediawiki.org/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

/**
 * Handles the page protection UI and backend
 */
class ProtectionForm {
        /** @var array A map of action to restriction level, from request or default */
        protected $mRestrictions = array();

        /** @var string The custom/additional protection reason */
        protected $mReason = '';

        /** @var string The reason selected from the list, blank for other/additional */
        protected $mReasonSelection = '';

        /** @var bool True if the restrictions are cascading, from request or existing protection */
        protected $mCascade = false;

        /** @var array Map of action to "other" expiry time. Used in preference to mExpirySelection. */
        protected $mExpiry = array();

        /**
         * @var array Map of action to value selected in expiry drop-down list.
         * Will be set to 'othertime' whenever mExpiry is set.
         */
        protected $mExpirySelection = array();

        /** @var array Permissions errors for the protect action */
        protected $mPermErrors = array();

        /** @var array Types (i.e. actions) for which levels can be selected */
        protected $mApplicableTypes = array();

        /** @var array Map of action to the expiry time of the existing protection */
        protected $mExistingExpiry = array();

        /** @var IContextSource */
        private $mContext;

        function __construct( Article $article ) {
                // Set instance variables.
                $this->mArticle = $article;
                $this->mTitle = $article->getTitle();
                $this->mApplicableTypes = $this->mTitle->getRestrictionTypes();
                $this->mContext = $article->getContext();

                // Check if the form should be disabled.
                // If it is, the form will be available in read-only to show levels.
                $this->mPermErrors = $this->mTitle->getUserPermissionsErrors(
                        'protect', $this->mContext->getUser()
                );
                if ( wfReadOnly() ) {
                        $this->mPermErrors[] = array( 'readonlytext', wfReadOnlyReason() );
                }
                $this->disabled = $this->mPermErrors != array();
                $this->disabledAttrib = $this->disabled
                        ? array( 'disabled' => 'disabled' )
                        : array();

                $this->loadData();
        }

        /**
         * Loads the current state of protection into the object.
         */
        function loadData() {
                $levels = MWNamespace::getRestrictionLevels(
                        $this->mTitle->getNamespace(), $this->mContext->getUser()
                );
                $this->mCascade = $this->mTitle->areRestrictionsCascading();

                $request = $this->mContext->getRequest();
                $this->mReason = $request->getText( 'mwProtect-reason' );
                $this->mReasonSelection = $request->getText( 'wpProtectReasonSelection' );
                $this->mCascade = $request->getBool( 'mwProtect-cascade', $this->mCascade );

                foreach ( $this->mApplicableTypes as $action ) {
                        // @todo FIXME: This form currently requires individual selections,
                        // but the db allows multiples separated by commas.

                        // Pull the actual restriction from the DB
                        $this->mRestrictions[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );

                        if ( !$this->mRestrictions[$action] ) {
                                // No existing expiry
                                $existingExpiry = '';
                        } else {
                                $existingExpiry = $this->mTitle->getRestrictionExpiry( $action );
                        }
                        $this->mExistingExpiry[$action] = $existingExpiry;

                        $requestExpiry = $request->getText( "mwProtect-expiry-$action" );
                        $requestExpirySelection = $request->getVal( "wpProtectExpirySelection-$action" );

                        if ( $requestExpiry ) {
                                // Custom expiry takes precedence
                                $this->mExpiry[$action] = $requestExpiry;
                                $this->mExpirySelection[$action] = 'othertime';
                        } elseif ( $requestExpirySelection ) {
                                // Expiry selected from list
                                $this->mExpiry[$action] = '';
                                $this->mExpirySelection[$action] = $requestExpirySelection;
                        } elseif ( $existingExpiry ) {
                                // Use existing expiry in its own list item
                                $this->mExpiry[$action] = '';
                                $this->mExpirySelection[$action] = $existingExpiry;
                        } else {
                                // Catches 'infinity' - Existing expiry is infinite, use "infinite" in drop-down
                                // Final default: infinite
                                $this->mExpiry[$action] = '';
                                $this->mExpirySelection[$action] = 'infinite';
                        }

                        $val = $request->getVal( "mwProtect-level-$action" );
                        if ( isset( $val ) && in_array( $val, $levels ) ) {
                                $this->mRestrictions[$action] = $val;
                        }
                }
        }

        /**
         * Get the expiry time for a given action, by combining the relevant inputs.
         *
         * @param string $action
         *
         * @return string 14-char timestamp or "infinity", or false if the input was invalid
         */
        function getExpiry( $action ) {
                if ( $this->mExpirySelection[$action] == 'existing' ) {
                        return $this->mExistingExpiry[$action];
                } elseif ( $this->mExpirySelection[$action] == 'othertime' ) {
                        $value = $this->mExpiry[$action];
                } else {
                        $value = $this->mExpirySelection[$action];
                }
                if ( $value == 'infinite' || $value == 'indefinite' || $value == 'infinity' ) {
                        $time = wfGetDB( DB_SLAVE )->getInfinity();
                } else {
                        $unix = strtotime( $value );

                        if ( !$unix || $unix === -1 ) {
                                return false;
                        }

                        // @todo FIXME: Non-qualified absolute times are not in users specified timezone
                        // and there isn't notice about it in the ui
                        $time = wfTimestamp( TS_MW, $unix );
                }
                return $time;
        }

        /**
         * Main entry point for action=protect and action=unprotect
         */
        function execute() {
                if ( MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) === array( '' ) ) {
                        throw new ErrorPageError( 'protect-badnamespace-title', 'protect-badnamespace-text' );
                }

                if ( $this->mContext->getRequest()->wasPosted() ) {
                        if ( $this->save() ) {
                                $q = $this->mArticle->isRedirect() ? 'redirect=no' : '';
                                $this->mContext->getOutput()->redirect( $this->mTitle->getFullURL( $q ) );
                        }
                } else {
                        $this->show();
                }
        }

        /**
         * Show the input form with optional error message
         *
         * @param string $err Error message or null if there's no error
         */
        function show( $err = null ) {
                $out = $this->mContext->getOutput();
                $out->setRobotPolicy( 'noindex,nofollow' );
                $out->addBacklinkSubtitle( $this->mTitle );

                if ( is_array( $err ) ) {
                        $out->wrapWikiMsg( "<p class='error'>\n$1\n</p>\n", $err );
                } elseif ( is_string( $err ) ) {
                        $out->addHTML( "<p class='error'>{$err}</p>\n" );
                }

                if ( $this->mTitle->getRestrictionTypes() === array() ) {
                        // No restriction types available for the current title
                        // this might happen if an extension alters the available types
                        $out->setPageTitle( $this->mContext->msg(
                                'protect-norestrictiontypes-title',
                                $this->mTitle->getPrefixedText()
                        ) );
                        $out->addWikiText( $this->mContext->msg( 'protect-norestrictiontypes-text' )->plain() );

                        // Show the log in case protection was possible once
                        $this->showLogExtract( $out );
                        // return as there isn't anything else we can do
                        return;
                }

                list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
                if ( $cascadeSources && count( $cascadeSources ) > 0 ) {
                        $titles = '';

                        foreach ( $cascadeSources as $title ) {
                                $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
                        }

                        /** @todo FIXME: i18n issue, should use formatted number. */
                        $out->wrapWikiMsg(
                                "<div id=\"mw-protect-cascadeon\">\n$1\n" . $titles . "</div>",
                                array( 'protect-cascadeon', count( $cascadeSources ) )
                        );
                }

                # Show an appropriate message if the user isn't allowed or able to change
                # the protection settings at this time
                if ( $this->disabled ) {
                        $out->setPageTitle(
                                $this->mContext->msg( 'protect-title-notallowed',
                                        $this->mTitle->getPrefixedText() )
                        );
                        $out->addWikiText( $out->formatPermissionsErrorMessage( $this->mPermErrors, 'protect' ) );
                } else {
                        $out->setPageTitle( $this->mContext->msg( 'protect-title', $this->mTitle->getPrefixedText() ) );
                        $out->addWikiMsg( 'protect-text',
                                wfEscapeWikiText( $this->mTitle->getPrefixedText() ) );
                }

                $out->addHTML( $this->buildForm() );
                $this->showLogExtract( $out );
        }

        /**
         * Save submitted protection form
         *
         * @return bool Success
         */
        function save() {
                # Permission check!
                if ( $this->disabled ) {
                        $this->show();
                        return false;
                }

                $request = $this->mContext->getRequest();
                $user = $this->mContext->getUser();
                $out = $this->mContext->getOutput();
                $token = $request->getVal( 'wpEditToken' );
                if ( !$user->matchEditToken( $token, array( 'protect', $this->mTitle->getPrefixedDBkey() ) ) ) {
                        $this->show( array( 'sessionfailure' ) );
                        return false;
                }

                # Create reason string. Use list and/or custom string.
                $reasonstr = $this->mReasonSelection;
                if ( $reasonstr != 'other' && $this->mReason != '' ) {
                        // Entry from drop down menu + additional comment
                        $reasonstr .= $this->mContext->msg( 'colon-separator' )->text() . $this->mReason;
                } elseif ( $reasonstr == 'other' ) {
                        $reasonstr = $this->mReason;
                }
                $expiry = array();
                foreach ( $this->mApplicableTypes as $action ) {
                        $expiry[$action] = $this->getExpiry( $action );
                        if ( empty( $this->mRestrictions[$action] ) ) {
                                continue; // unprotected
                        }
                        if ( !$expiry[$action] ) {
                                $this->show( array( 'protect_expiry_invalid' ) );
                                return false;
                        }
                        if ( $expiry[$action] < wfTimestampNow() ) {
                                $this->show( array( 'protect_expiry_old' ) );
                                return false;
                        }
                }

                $this->mCascade = $request->getBool( 'mwProtect-cascade' );

                $status = $this->mArticle->doUpdateRestrictions(
                        $this->mRestrictions,
                        $expiry,
                        $this->mCascade,
                        $reasonstr,
                        $user
                );

                if ( !$status->isOK() ) {
                        $this->show( $out->parseInline( $status->getWikiText() ) );
                        return false;
                }

                /**
                 * Give extensions a change to handle added form items
                 *
                 * @since 1.19 you can (and you should) return false to abort saving;
                 *             you can also return an array of message name and its parameters
                 */
                $errorMsg = '';
                if ( !Hooks::run( 'ProtectionForm::save', array( $this->mArticle, &$errorMsg, $reasonstr ) ) ) {
                        if ( $errorMsg == '' ) {
                                $errorMsg = array( 'hookaborted' );
                        }
                }
                if ( $errorMsg != '' ) {
                        $this->show( $errorMsg );
                        return false;
                }

                WatchAction::doWatchOrUnwatch( $request->getCheck( 'mwProtectWatch' ), $this->mTitle, $user );

                return true;
        }

        /**
         * Build the input form
         *
         * @return string HTML form
         */
        function buildForm() {
                $context = $this->mContext;
                $user = $context->getUser();
                $output = $context->getOutput();
                $lang = $context->getLanguage();
                $cascadingRestrictionLevels = $context->getConfig()->get( 'CascadingRestrictionLevels' );
                $out = '';
                if ( !$this->disabled ) {
                        $output->addModules( 'mediawiki.legacy.protect' );
                        $output->addJsConfigVars( 'wgCascadeableLevels', $cascadingRestrictionLevels );
                        $out .= Xml::openElement( 'form', array( 'method' => 'post',
                                'action' => $this->mTitle->getLocalURL( 'action=protect' ),
                                'id' => 'mw-Protect-Form' ) );
                }

                $out .= Xml::openElement( 'fieldset' ) .
                        Xml::element( 'legend', null, $context->msg( 'protect-legend' )->text() ) .
                        Xml::openElement( 'table', array( 'id' => 'mwProtectSet' ) ) .
                        Xml::openElement( 'tbody' );

                $scExpiryOptions = wfMessage( 'protect-expiry-options' )->inContentLanguage()->text();
                $showProtectOptions = $scExpiryOptions !== '-' && !$this->disabled;

                // Not all languages have V_x <-> N_x relation
                foreach ( $this->mRestrictions as $action => $selected ) {
                        // Messages:
                        // restriction-edit, restriction-move, restriction-create, restriction-upload
                        $msg = $context->msg( 'restriction-' . $action );
                        $out .= "<tr><td>" .
                        Xml::openElement( 'fieldset' ) .
                        Xml::element( 'legend', null, $msg->exists() ? $msg->text() : $action ) .
                        Xml::openElement( 'table', array( 'id' => "mw-protect-table-$action" ) ) .
                                "<tr><td>" . $this->buildSelector( $action, $selected ) . "</td></tr><tr><td>";

                        $mProtectexpiry = Xml::label(
                                $context->msg( 'protectexpiry' )->text(),
                                "mwProtectExpirySelection-$action"
                        );
                        $mProtectother = Xml::label(
                                $context->msg( 'protect-othertime' )->text(),
                                "mwProtect-$action-expires"
                        );

                        $expiryFormOptions = '';
                        if ( $this->mExistingExpiry[$action] ) {
                                if ( $this->mExistingExpiry[$action] == 'infinity' ) {
                                        $existingExpiryMessage = $context->msg( 'protect-existing-expiry-infinity' );
                                } else {
                                        $timestamp = $lang->userTimeAndDate( $this->mExistingExpiry[$action], $user );
                                        $d = $lang->userDate( $this->mExistingExpiry[$action], $user );
                                        $t = $lang->userTime( $this->mExistingExpiry[$action], $user );
                                        $existingExpiryMessage = $context->msg( 'protect-existing-expiry', $timestamp, $d, $t );
                                }
                                $expiryFormOptions .=
                                        Xml::option(
                                                $existingExpiryMessage->text(),
                                                'existing',
                                                $this->mExpirySelection[$action] == 'existing'
                                        ) . "\n";
                        }

                        $expiryFormOptions .= Xml::option(
                                $context->msg( 'protect-othertime-op' )->text(),
                                "othertime"
                        ) . "\n";
                        foreach ( explode( ',', $scExpiryOptions ) as $option ) {
                                if ( strpos( $option, ":" ) === false ) {
                                        $show = $value = $option;
                                } else {
                                        list( $show, $value ) = explode( ":", $option );
                                }
                                $expiryFormOptions .= Xml::option(
                                        $show,
                                        htmlspecialchars( $value ),
                                        $this->mExpirySelection[$action] === $value
                                ) . "\n";
                        }
                        # Add expiry dropdown
                        if ( $showProtectOptions && !$this->disabled ) {
                                $out .= "
                                        <table><tr>
                                                <td class='mw-label'>
                                                        {$mProtectexpiry}
                                                </td>
                                                <td class='mw-input'>" .
                                                        Xml::tags( 'select',
                                                                array(
                                                                        'id' => "mwProtectExpirySelection-$action",
                                                                        'name' => "wpProtectExpirySelection-$action",
                                                                        'tabindex' => '2' ) + $this->disabledAttrib,
                                                                $expiryFormOptions ) .
                                                "</td>
                                        </tr></table>";
                        }
                        # Add custom expiry field
                        $attribs = array( 'id' => "mwProtect-$action-expires" ) + $this->disabledAttrib;
                        $out .= "<table><tr>
                                        <td class='mw-label'>" .
                                                $mProtectother .
                                        '</td>
                                        <td class="mw-input">' .
                                                Xml::input( "mwProtect-expiry-$action", 50, $this->mExpiry[$action], $attribs ) .
                                        '</td>
                                </tr></table>';
                        $out .= "</td></tr>" .
                        Xml::closeElement( 'table' ) .
                        Xml::closeElement( 'fieldset' ) .
                        "</td></tr>";
                }
                # Give extensions a chance to add items to the form
                Hooks::run( 'ProtectionForm::buildForm', array( $this->mArticle, &$out ) );

                $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );

                // JavaScript will add another row with a value-chaining checkbox
                if ( $this->mTitle->exists() ) {
                        $out .= Xml::openElement( 'table', array( 'id' => 'mw-protect-table2' ) ) .
                                Xml::openElement( 'tbody' );
                        $out .= '<tr>
                                        <td></td>
                                        <td class="mw-input">' .
                                                Xml::checkLabel(
                                                        $context->msg( 'protect-cascade' )->text(),
                                                        'mwProtect-cascade',
                                                        'mwProtect-cascade',
                                                        $this->mCascade, $this->disabledAttrib
                                                ) .
                                        "</td>
                                </tr>\n";
                        $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
                }

                # Add manual and custom reason field/selects as well as submit
                if ( !$this->disabled ) {
                        $mProtectreasonother = Xml::label(
                                $context->msg( 'protectcomment' )->text(),
                                'wpProtectReasonSelection'
                        );

                        $mProtectreason = Xml::label(
                                $context->msg( 'protect-otherreason' )->text(),
                                'mwProtect-reason'
                        );

                        $reasonDropDown = Xml::listDropDown( 'wpProtectReasonSelection',
                                wfMessage( 'protect-dropdown' )->inContentLanguage()->text(),
                                wfMessage( 'protect-otherreason-op' )->inContentLanguage()->text(),
                                $this->mReasonSelection,
                                'mwProtect-reason', 4 );

                        $out .= Xml::openElement( 'table', array( 'id' => 'mw-protect-table3' ) ) .
                                Xml::openElement( 'tbody' );
                        $out .= "
                                <tr>
                                        <td class='mw-label'>
                                                {$mProtectreasonother}
                                        </td>
                                        <td class='mw-input'>
                                                {$reasonDropDown}
                                        </td>
                                </tr>
                                <tr>
                                        <td class='mw-label'>
                                                {$mProtectreason}
                                        </td>
                                        <td class='mw-input'>" .
                                                Xml::input( 'mwProtect-reason', 60, $this->mReason, array( 'type' => 'text',
                                                        'id' => 'mwProtect-reason', 'maxlength' => 180 ) ) .
                                                        // Limited maxlength as the database trims at 255 bytes and other texts
                                                        // chosen by dropdown menus on this page are also included in this database field.
                                                        // The byte limit of 180 bytes is enforced in javascript
                                        "</td>
                                </tr>";
                        # Disallow watching is user is not logged in
                        if ( $user->isLoggedIn() ) {
                                $out .= "
                                <tr>
                                        <td></td>
                                        <td class='mw-input'>" .
                                                Xml::checkLabel( $context->msg( 'watchthis' )->text(),
                                                        'mwProtectWatch', 'mwProtectWatch',
                                                        $user->isWatched( $this->mTitle ) || $user->getOption( 'watchdefault' ) ) .
                                        "</td>
                                </tr>";
                        }
                        $out .= "
                                <tr>
                                        <td></td>
                                        <td class='mw-submit'>" .
                                                Xml::submitButton(
                                                        $context->msg( 'confirm' )->text(),
                                                        array( 'id' => 'mw-Protect-submit' )
                                                ) .
                                        "</td>
                                </tr>\n";
                        $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
                }
                $out .= Xml::closeElement( 'fieldset' );

                if ( $user->isAllowed( 'editinterface' ) ) {
                        $title = Title::makeTitle( NS_MEDIAWIKI, 'Protect-dropdown' );
                        $link = Linker::link(
                                $title,
                                $context->msg( 'protect-edit-reasonlist' )->escaped(),
                                array(),
                                array( 'action' => 'edit' )
                        );
                        $out .= '<p class="mw-protect-editreasons">' . $link . '</p>';
                }

                if ( !$this->disabled ) {
                        $out .= Html::hidden(
                                'wpEditToken',
                                $user->getEditToken( array( 'protect', $this->mTitle->getPrefixedDBkey() ) )
                        );
                        $out .= Xml::closeElement( 'form' );
                }

                return $out;
        }

        /**
         * Build protection level selector
         *
         * @param string $action Action to protect
         * @param string $selected Current protection level
         * @return string HTML fragment
         */
        function buildSelector( $action, $selected ) {
                // If the form is disabled, display all relevant levels. Otherwise,
                // just show the ones this user can use.
                $levels = MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace(),
                        $this->disabled ? null : $this->mContext->getUser()
                );

                $id = 'mwProtect-level-' . $action;
                $attribs = array(
                        'id' => $id,
                        'name' => $id,
                        'size' => count( $levels ),
                ) + $this->disabledAttrib;

                $out = Xml::openElement( 'select', $attribs );
                foreach ( $levels as $key ) {
                        $out .= Xml::option( $this->getOptionLabel( $key ), $key, $key == $selected );
                }
                $out .= Xml::closeElement( 'select' );
                return $out;
        }

        /**
         * Prepare the label for a protection selector option
         *
         * @param string $permission Permission required
         * @return string
         */
        private function getOptionLabel( $permission ) {
                if ( $permission == '' ) {
                        return $this->mContext->msg( 'protect-default' )->text();
                } else {
                        // Messages: protect-level-autoconfirmed, protect-level-sysop
                        $msg = $this->mContext->msg( "protect-level-{$permission}" );
                        if ( $msg->exists() ) {
                                return $msg->text();
                        }
                        return $this->mContext->msg( 'protect-fallback', $permission )->text();
                }
        }

        /**
         * Show protection long extracts for this page
         *
         * @param OutputPage $out
         * @access private
         */
        function showLogExtract( &$out ) {
                # Show relevant lines from the protection log:
                $protectLogPage = new LogPage( 'protect' );
                $out->addHTML( Xml::element( 'h2', null, $protectLogPage->getName()->text() ) );
                LogEventsList::showLogExtract( $out, 'protect', $this->mTitle );
                # Let extensions add other relevant log extracts
                Hooks::run( 'ProtectionForm::showLogExtract', array( $this->mArticle, $out ) );
        }
}