includes/SiteConfiguration.php

   1 <?php
   2
   3 /**
   4  * The include paths change after this file is included from commandLine.inc,
   5  * meaning that require_once() fails to detect that it is including the same
   6  * file again. We use DIY C-style protection as a workaround.
   7  */
   8
   9 // Hide this pattern from Doxygen, which spazzes out at it
  10 /// @cond
  11 if (!defined('SITE_CONFIGURATION')) {
  12 define('SITE_CONFIGURATION', 1);
  13 /// @endcond
  14
  15 /**
  16  * This is a class used to hold configuration settings, particularly for multi-wiki sites.
  17  *
  18  */
  19 class SiteConfiguration {
  20         var $suffixes = array();
  21         var $wikis = array();
  22         var $settings = array();
  23         var $localVHosts = array();
  24
  25         /**
  26          * Retrieves a configuration setting for a given wiki.
  27          * @param $settingName String ID of the setting name to retrieve
  28          * @param $wiki String Wiki ID of the wiki in question.
  29          * @param $suffix String The suffix of the wiki in question.
  30          * @param $params Array List of parameters. $.'key' is replaced by $value in all returned data.
  31          * @param $wikiTags Array The tags assigned to the wiki.
  32          * @return Mixed the value of the setting requested.
  33          */
  34         function get( $settingName, $wiki, $suffix, $params = array(), $wikiTags = array() ) {
  35                 if ( array_key_exists( $settingName, $this->settings ) ) {
  36                         $thisSetting =& $this->settings[$settingName];
  37                         do {
  38                                 // Do individual wiki settings
  39                                 if ( array_key_exists( $wiki, $thisSetting ) ) {
  40                                         $retval = $thisSetting[$wiki];
  41                                         break;
  42                                 } elseif ( array_key_exists( "+$wiki", $thisSetting ) && is_array($thisSetting["+$wiki"]) ) {
  43                                         $retval = $thisSetting["+$wiki"];
  44                                 }
  45
  46                                 // Do tag settings
  47                                 foreach ( $wikiTags as $tag ) {
  48                                         if ( array_key_exists( $tag, $thisSetting ) ) {
  49                                                 if ( isset($retval) && is_array($retval) && is_array($thisSetting[$tag]) ) {
  50                                                         $retval = array_merge( $retval, $thisSetting[$tag] );
  51                                                 } else {
  52                                                         $retval = $thisSetting[$tag];
  53                                                 }
  54                                                 break 2;
  55                                         } elseif ( array_key_exists( "+$tag", $thisSetting ) && is_array($thisSetting["+$tag"]) ) {
  56                                                 if (!isset($retval))
  57                                                         $retval = array();
  58                                                 $retval = array_merge( $retval, $thisSetting["+$tag"] );
  59                                         }
  60                                 }
  61
  62                                 // Do suffix settings
  63                                 if ( array_key_exists( $suffix, $thisSetting ) ) {
  64                                         if ( isset($retval) && is_array($retval) && is_array($thisSetting[$suffix]) ) {
  65                                                 $retval = array_merge( $retval, $thisSetting[$suffix] );
  66                                         } else {
  67                                                 $retval = $thisSetting[$suffix];
  68                                         }
  69                                         break;
  70                                 } elseif ( array_key_exists( "+$suffix", $thisSetting ) && is_array($thisSetting["+$suffix"]) ) {
  71                                         if (!isset($retval))
  72                                                 $retval = array();
  73                                         $retval = array_merge( $retval, $thisSetting["+$suffix"] );
  74                                 }
  75
  76                                 // Fall back to default.
  77                                 if ( array_key_exists( 'default', $thisSetting ) ) {
  78                                         if ( isset($retval) && is_array($retval) && is_array($thisSetting['default']) ) {
  79                                                 $retval = array_merge( $retval, $thisSetting['default'] );
  80                                         } else {
  81                                                 $retval = $thisSetting['default'];
  82                                         }
  83                                         break;
  84                                 }
  85                                 $retval = null;
  86                         } while ( false );
  87                 } else {
  88                         $retval = NULL;
  89                 }
  90
  91                 if ( !is_null( $retval ) && count( $params ) ) {
  92                         foreach ( $params as $key => $value ) {
  93                                 $retval = $this->doReplace( '$' . $key, $value, $retval );
  94                         }
  95                 }
  96                 return $retval;
  97         }
  98
  99         /** Type-safe string replace; won't do replacements on non-strings */
 100         function doReplace( $from, $to, $in ) {
 101                 if( is_string( $in ) ) {
 102                         return str_replace( $from, $to, $in );
 103                 } elseif( is_array( $in ) ) {
 104                         foreach( $in as $key => $val ) {
 105                                 $in[$key] = $this->doReplace( $from, $to, $val );
 106                         }
 107                         return $in;
 108                 } else {
 109                         return $in;
 110                 }
 111         }
 112
 113         /**
 114          * Gets all settings for a wiki
 115          * @param $wiki String Wiki ID of the wiki in question.
 116          * @param $suffix String The suffix of the wiki in question.
 117          * @param $params Array List of parameters. $.'key' is replaced by $value in all returned data.
 118          * @param $wikiTags Array The tags assigned to the wiki.
 119          * @return Array Array of settings requested.
 120          */
 121         function getAll( $wiki, $suffix, $params, $wikiTags = array() ) {
 122                 $localSettings = array();
 123                 foreach ( $this->settings as $varname => $stuff ) {
 124                         $append = false;
 125                         $var = $varname;
 126                         if ( substr( $varname, 0, 1 ) == '+' ) {
 127                                 $append = true;
 128                                 $var = substr( $varname, 1 );
 129                         }
 130
 131                         $value = $this->get( $varname, $wiki, $suffix, $params, $wikiTags );
 132                         if ( $append && is_array($value) && is_array( $GLOBALS[$var] ) )
 133                                 $value = array_merge( $value, $GLOBALS[$var] );
 134                         if ( !is_null( $value ) ) {
 135                                 $localSettings[$var] = $value;
 136                         }
 137                 }
 138                 return $localSettings;
 139         }
 140
 141         /**
 142          * Retrieves a configuration setting for a given wiki, forced to a boolean.
 143          * @param $settingName String ID of the setting name to retrieve
 144          * @param $wiki String Wiki ID of the wiki in question.
 145          * @param $suffix String The suffix of the wiki in question.
 146          * @param $params Array List of parameters. $.'key' is replaced by $value in all returned data.
 147          * @param $wikiTags Array The tags assigned to the wiki.
 148          * @return bool The value of the setting requested.
 149          */
 150         function getBool( $setting, $wiki, $suffix, $wikiTags = array() ) {
 151                 return (bool)($this->get( $setting, $wiki, $suffix, array(), $wikiTags ) );
 152         }
 153
 154         /** Retrieves an array of local databases */
 155         function &getLocalDatabases() {
 156                 return $this->wikis;
 157         }
 158
 159         /** A no-op */
 160         function initialise() {
 161         }
 162
 163         /**
 164          * Retrieves the value of a given setting, and places it in a variable passed by reference.
 165          * @param $settingName String ID of the setting name to retrieve
 166          * @param $wiki String Wiki ID of the wiki in question.
 167          * @param $suffix String The suffix of the wiki in question.
 168          * @param $var Reference The variable to insert the value into.
 169          * @param $params Array List of parameters. $.'key' is replaced by $value in all returned data.
 170          * @param $wikiTags Array The tags assigned to the wiki.
 171          */
 172         function extractVar( $setting, $wiki, $suffix, &$var, $params, $wikiTags = array() ) {
 173                 $value = $this->get( $setting, $wiki, $suffix, $params, $wikiTags );
 174                 if ( !is_null( $value ) ) {
 175                         $var = $value;
 176                 }
 177         }
 178
 179         /**
 180          * Retrieves the value of a given setting, and places it in its corresponding global variable.
 181          * @param $settingName String ID of the setting name to retrieve
 182          * @param $wiki String Wiki ID of the wiki in question.
 183          * @param $suffix String The suffix of the wiki in question.
 184          * @param $params Array List of parameters. $.'key' is replaced by $value in all returned data.
 185          * @param $wikiTags Array The tags assigned to the wiki.
 186          */
 187         function extractGlobal( $setting, $wiki, $suffix, $params, $wikiTags = array() ) {
 188                 $value = $this->get( $setting, $wiki, $suffix, $params, $wikiTags );
 189                 if ( !is_null( $value ) ) {
 190                         if (substr($setting,0,1) == '+' && is_array($value)) {
 191                                 $setting = substr($setting,1);
 192                                 if ( is_array($GLOBALS[$setting]) ) {
 193                                         $GLOBALS[$setting] = array_merge( $GLOBALS[$setting], $value );
 194                                 } else {
 195                                         $GLOBALS[$setting] = $value;
 196                                 }
 197                         } else {
 198                                 $GLOBALS[$setting] = $value;
 199                         }
 200                 }
 201         }
 202
 203         /**
 204          * Retrieves the values of all settings, and places them in their corresponding global variables.
 205          * @param $wiki String Wiki ID of the wiki in question.
 206          * @param $suffix String The suffix of the wiki in question.
 207          * @param $params Array List of parameters. $.'key' is replaced by $value in all returned data.
 208          * @param $wikiTags Array The tags assigned to the wiki.
 209          */
 210         function extractAllGlobals( $wiki, $suffix, $params, $wikiTags = array() ) {
 211                 foreach ( $this->settings as $varName => $setting ) {
 212                         $this->extractGlobal( $varName, $wiki, $suffix, $params, $wikiTags );
 213                 }
 214         }
 215
 216         /**
 217          * Work out the site and language name from a database name
 218          * @param $db
 219          */
 220         function siteFromDB( $db ) {
 221                 $site = NULL;
 222                 $lang = NULL;
 223
 224                 // Only run hooks if they *can* be run.
 225                 if (function_exists( 'wfRunHooks' ) && !wfRunHooks( 'SiteFromDB', array( $db, &$site, &$lang ) ) )
 226                         return array( $site, $lang );
 227                 foreach ( $this->suffixes as $suffix ) {
 228                         if ( $suffix === '' ) {
 229                                 $site = '';
 230                                 $lang = $db;
 231                                 break;
 232                         } elseif ( substr( $db, -strlen( $suffix ) ) == $suffix ) {
 233                                 $site = $suffix == 'wiki' ? 'wikipedia' : $suffix;
 234                                 $lang = substr( $db, 0, strlen( $db ) - strlen( $suffix ) );
 235                                 break;
 236                         }
 237                 }
 238                 $lang = str_replace( '_', '-', $lang );
 239                 return array( $site, $lang );
 240         }
 241
 242         /** Returns true if the given vhost is handled locally. */
 243         function isLocalVHost( $vhost ) {
 244                 return in_array( $vhost, $this->localVHosts );
 245         }
 246 }
 247 }