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1 | <?php |
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2 | /** |
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3 | * Implements Special:Activeusers |
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4 | * |
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5 | * Copyright © 2008 Aaron Schulz |
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6 | * |
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7 | * This program is free software; you can redistribute it and/or modify |
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8 | * it under the terms of the GNU General Public License as published by |
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9 | * the Free Software Foundation; either version 2 of the License, or |
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10 | * (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License along |
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18 | * with this program; if not, write to the Free Software Foundation, Inc., |
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19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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20 | * http://www.gnu.org/copyleft/gpl.html |
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21 | * |
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22 | * @file |
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23 | * @ingroup SpecialPage |
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24 | */ |
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25 | |||
26 | /** |
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27 | * Implements Special:Activeusers |
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28 | * |
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29 | * @ingroup SpecialPage |
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30 | */ |
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31 | class SpecialActiveUsers extends SpecialPage { |
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32 | |||
33 | /** |
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34 | * Constructor |
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35 | */ |
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36 | public function __construct() { |
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37 | parent::__construct( 'Activeusers' ); |
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38 | } |
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39 | |||
40 | /** |
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41 | * Show the special page |
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42 | * |
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43 | * @param string $par Parameter passed to the page or null |
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44 | */ |
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45 | public function execute( $par ) { |
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46 | $out = $this->getOutput(); |
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47 | |||
48 | $this->setHeaders(); |
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49 | $this->outputHeader(); |
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50 | |||
51 | $opts = new FormOptions(); |
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52 | |||
53 | $opts->add( 'username', '' ); |
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54 | $opts->add( 'groups', [] ); |
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55 | |||
56 | $opts->fetchValuesFromRequest( $this->getRequest() ); |
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57 | |||
58 | if ( $par !== null ) { |
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59 | $opts->setValue( 'username', $par ); |
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60 | } |
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61 | |||
62 | $pager = new ActiveUsersPager( $this->getContext(), $opts ); |
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63 | $usersBody = $pager->getBody(); |
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64 | |||
65 | $this->buildForm(); |
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66 | |||
67 | if ( $usersBody ) { |
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68 | $out->addHTML( |
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69 | $pager->getNavigationBar() . |
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70 | Html::rawElement( 'ul', [], $usersBody ) . |
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71 | $pager->getNavigationBar() |
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72 | ); |
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73 | } else { |
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74 | $out->addWikiMsg( 'activeusers-noresult' ); |
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75 | } |
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76 | } |
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77 | |||
78 | /** |
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79 | * Generate and output the form |
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80 | */ |
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81 | protected function buildForm() { |
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82 | $groups = User::getAllGroups(); |
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83 | |||
84 | foreach ( $groups as $group ) { |
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85 | $msg = User::getGroupName( $group ); |
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86 | $options[$msg] = $group; |
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87 | } |
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88 | |||
89 | $formDescriptor = [ |
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90 | 'username' => [ |
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91 | 'type' => 'user', |
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92 | 'name' => 'username', |
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93 | 'label-message' => 'activeusers-from', |
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94 | ], |
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95 | |||
96 | 'groups' => [ |
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97 | 'type' => 'multiselect', |
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98 | 'dropdown' => true, |
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99 | 'flatlist' => true, |
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100 | 'name' => 'groups', |
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101 | 'label-message' => 'activeusers-groups', |
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102 | 'options' => $options, |
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103 | ], |
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104 | ]; |
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105 | |||
106 | HTMLForm::factory( 'ooui', $formDescriptor, $this->getContext() ) |
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107 | // For the 'multiselect' field values to be preserved on submit |
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108 | ->setFormIdentifier( 'specialactiveusers' ) |
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109 | ->setIntro( $this->getIntroText() ) |
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110 | ->setWrapperLegendMsg( 'activeusers' ) |
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111 | ->setSubmitTextMsg( 'activeusers-submit' ) |
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112 | // prevent setting subpage and 'username' parameter at the same time |
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113 | ->setAction( $this->getPageTitle()->getLocalURL() ) |
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114 | ->setMethod( 'get' ) |
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115 | ->prepareForm() |
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116 | ->displayForm( false ); |
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117 | } |
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118 | |||
119 | /** |
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120 | * Return introductory message. |
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121 | * @return string |
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122 | */ |
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123 | protected function getIntroText() { |
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124 | $days = $this->getConfig()->get( 'ActiveUserDays' ); |
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125 | |||
126 | $intro = $this->msg( 'activeusers-intro' )->numParams( $days )->parse(); |
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127 | |||
128 | // Mention the level of cache staleness... |
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129 | $dbr = wfGetDB( DB_REPLICA, 'recentchanges' ); |
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130 | $rcMax = $dbr->selectField( 'recentchanges', 'MAX(rc_timestamp)', '', __METHOD__ ); |
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131 | if ( $rcMax ) { |
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132 | $cTime = $dbr->selectField( 'querycache_info', |
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133 | 'qci_timestamp', |
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134 | [ 'qci_type' => 'activeusers' ], |
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135 | __METHOD__ |
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136 | ); |
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137 | if ( $cTime ) { |
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138 | $secondsOld = wfTimestamp( TS_UNIX, $rcMax ) - wfTimestamp( TS_UNIX, $cTime ); |
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139 | } else { |
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140 | $rcMin = $dbr->selectField( 'recentchanges', 'MIN(rc_timestamp)' ); |
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141 | $secondsOld = time() - wfTimestamp( TS_UNIX, $rcMin ); |
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142 | } |
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143 | if ( $secondsOld > 0 ) { |
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144 | $intro .= $this->msg( 'cachedspecial-viewing-cached-ttl' ) |
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145 | ->durationParams( $secondsOld )->parseAsBlock(); |
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146 | } |
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147 | } |
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148 | |||
149 | return $intro; |
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150 | } |
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151 | |||
152 | protected function getGroupName() { |
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153 | return 'users'; |
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154 | } |
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155 | } |
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156 |
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: