www/ecrire/req/sqlite_fonctions.php

   1 <?php
   2
   3 /***************************************************************************\
   4  *  SPIP, Systeme de publication pour l'internet                           *
   5  *                                                                         *
   6  *  Copyright (c) 2001-2012                                                *
   7  *  Arnaud Martin, Antoine Pitrou, Philippe Riviere, Emmanuel Saint-James  *
   8  *                                                                         *
   9  *  Ce programme est un logiciel libre distribue sous licence GNU/GPL.     *
  10  *  Pour plus de details voir le fichier COPYING.txt ou l'aide en ligne.   *
  11 \***************************************************************************/
  12
  13
  14 if (!defined('_ECRIRE_INC_VERSION')) return;
  15
  16 /*
  17  * Des fonctions pour les requetes SQL
  18  *
  19  * Voir la liste des fonctions natives : http://www.sqlite.org/lang_corefunc.html
  20  * Et la liste des evolutions pour : http://sqlite.org/changes.html
  21  *
  22  */
  23 // http://doc.spip.org/@_sqlite_init_functions
  24 function _sqlite_init_functions(&$sqlite){
  25
  26         if (!$sqlite) return false;
  27
  28
  29         $fonctions = array(
  30                 'CONCAT'                => array( '_sqlite_func_concat'                 ,-1),
  31                 'CEIL'      => array( '_sqlite_func_ceil', 1), // absent de sqlite2
  32
  33                 'DATE_FORMAT'   => array( '_sqlite_func_strftime'               ,2),
  34                 'DAYOFMONTH'    => array( '_sqlite_func_dayofmonth'             ,1),
  35
  36                 'EXTRAIRE_MULTI' => array( '_sqlite_func_extraire_multi', 2), // specifique a SPIP/sql_multi()
  37                 'EXP'                   => array( 'exp'                                                 ,1),//exponentielle
  38                 'FIND_IN_SET'   => array( '_sqlite_func_find_in_set'    ,2),
  39                 'FLOOR'      => array( '_sqlite_func_floor', 1), // absent de sqlite2
  40
  41                 'IF'                    => array( '_sqlite_func_if'                     ,3),
  42                 'INSERT'                => array( '_sqlite_func_insert'                 ,4),
  43                 'INSTR'                 => array( '_sqlite_func_instr'                  ,2),
  44
  45                 'LEAST'                 => array( '_sqlite_func_least'                  ,3),
  46                 '_LEFT'                 => array( '_sqlite_func_left'                   ,2),
  47 #               'LENGTH'                => array( 'strlen'                                              ,1), // present v1.0.4
  48 #               'LOWER'                 => array( 'strtolower'                                  ,1), // present v2.4
  49 #               'LTRIM'                 => array( 'ltrim'                                               ,1), // present en theorie
  50
  51                 'NOW'                   => array( '_sqlite_func_now'                    ,0),
  52
  53                 'MD5'                   => array( 'md5'                                                 ,1),
  54                 'MONTH'                 => array( '_sqlite_func_month'                  ,1),
  55
  56                 'PREG_REPLACE'  => array( '_sqlite_func_preg_replace'   ,3),
  57
  58                 'RAND'                  => array( '_sqlite_func_rand'                   ,0), // sinon random() v2.4
  59                 'REGEXP'                => array( '_sqlite_func_regexp_match'   ,2), // critere REGEXP supporte a partir de v3.3.2
  60                 //'REGEXP_MATCH'        => array( '_sqlite_func_regexp_match'   ,2), // critere REGEXP supporte a partir de v3.3.2
  61
  62                 'RIGHT'                 => array( '_sqlite_func_right'                  ,2),
  63 #               'RTRIM'                 => array( 'rtrim'                                               ,1), // present en theorie
  64
  65                 'SETTYPE'               => array( 'settype'                                             ,2), // CAST present en v3.2.3
  66                 'SQRT'                  => array( 'sqrt'                                                ,1),
  67                 'SUBSTRING'             => array( '_sqlite_func_substring'                                              /*,3*/), // peut etre appelee avec 2 ou 3 arguments, index base 1 et non 0
  68
  69                 'TO_DAYS'               => array( '_sqlite_func_to_days'                ,1),
  70 #               'TRIM'                  => array( 'trim'                                                ,1), // present en theorie
  71
  72                 'TIMESTAMPDIFF' => array('_sqlite_timestampdiff'                /*,3*/),
  73
  74                 'UNIX_TIMESTAMP'=> array( '_sqlite_func_unix_timestamp' ,1),
  75 #               'UPPER'                 => array( 'strtoupper'                                  ,1), // present v2.4
  76
  77                 'VIDE'                  => array( '_sqlite_func_vide'                   ,0), // du vide pour SELECT 0 as x ... ORDER BY x -> ORDER BY vide()
  78
  79                 'YEAR'                  => array( '_sqlite_func_year'                   ,1)
  80         );
  81
  82
  83         foreach ($fonctions as $f=>$r){
  84                 _sqlite_add_function($sqlite, $f, $r);
  85         }
  86
  87         #spip_log('functions sqlite chargees ','sqlite.'._LOG_DEBUG);
  88 }
  89
  90 // permet au besoin de charger des fonctions ailleurs par _sqlite_init_functions();
  91 // http://doc.spip.org/@_sqlite_add_function
  92 function _sqlite_add_function(&$sqlite, &$f, &$r){
  93         if (_sqlite_is_version(3, $sqlite)){
  94                 isset($r[1])
  95                         ?$sqlite->sqliteCreateFunction($f, $r[0], $r[1])
  96                         :$sqlite->sqliteCreateFunction($f, $r[0]);
  97         } else {
  98                 isset($r[1])
  99                         ?sqlite_create_function($sqlite, $f, $r[0], $r[1])
 100                         :sqlite_create_function($sqlite, $f, $r[0]);
 101         }
 102 }
 103
 104 //
 105 // SQLite : fonctions sqlite -> php
 106 // entre autre auteurs : mlebas
 107 //
 108
 109 function _sqlite_func_ceil($a) {
 110         return ceil($a);
 111 }
 112
 113 // http://doc.spip.org/@_sqlite_func_concat
 114 function _sqlite_func_concat () {
 115         $args = func_get_args();
 116         return join('',$args);
 117 }
 118
 119
 120 // http://doc.spip.org/@_sqlite_func_dayofmonth
 121 function _sqlite_func_dayofmonth ($d) {
 122         return date("d",_sqlite_func_unix_timestamp($d));
 123 }
 124
 125
 126 // http://doc.spip.org/@_sqlite_func_find_in_set
 127 function _sqlite_func_find_in_set($num, $set) {
 128   $rank=0;
 129   foreach (explode(",",$set) as $v) {
 130    if ($v == $num) return (++$rank);
 131    $rank++;
 132   }
 133   return 0;
 134 }
 135
 136 function _sqlite_func_floor($a) {
 137         return floor($a);
 138 }
 139
 140 // http://doc.spip.org/@_sqlite_func_if
 141 function _sqlite_func_if ($bool, $oui, $non) {
 142     return ($bool)?$oui:$non;
 143 }
 144
 145
 146 /*
 147  * INSERT(chaine, index, longueur, chaine)      MySQL
 148  * Retourne une chaine de caracteres a partir d'une chaine dans laquelle "sschaine"
 149  *  a ete inseree a la position "index" en remplacant "longueur" caracteres.
 150  */
 151 // http://doc.spip.org/@_sqlite_func_insert
 152 function _sqlite_func_insert ($s, $index, $longueur, $chaine) {
 153         return
 154                         substr($s,0, $index)
 155                 . $chaine
 156                 . substr(substr($s, $index), $longueur);
 157 }
 158
 159
 160 // http://doc.spip.org/@_sqlite_func_instr
 161 function _sqlite_func_instr ($s, $search) {
 162     return strpos($s,$search);
 163 }
 164
 165
 166 // http://doc.spip.org/@_sqlite_func_least
 167 function _sqlite_func_least () {
 168         $arg_list = func_get_args();
 169     $least = min($arg_list);
 170         #spip_log("Passage avec LEAST : $least",'sqlite.'._LOG_DEBUG);
 171         return $least;
 172 }
 173
 174
 175 // http://doc.spip.org/@_sqlite_func_left
 176 function _sqlite_func_left ($s, $lenght) {
 177     return substr($s,0,$lenght);
 178 }
 179
 180
 181 // http://doc.spip.org/@_sqlite_func_now
 182 function _sqlite_func_now(){
 183         $result = date("Y-m-d H:i:s");
 184         #spip_log("Passage avec NOW : $result",'sqlite.'._LOG_DEBUG);
 185         return $result;
 186 }
 187
 188
 189 // http://doc.spip.org/@_sqlite_func_month
 190 function _sqlite_func_month ($d) {
 191         return date("m",_sqlite_func_unix_timestamp($d));
 192 }
 193
 194
 195
 196 // http://doc.spip.org/@_sqlite_func_preg_replace
 197 function _sqlite_func_preg_replace($quoi, $cherche, $remplace) {
 198         $return = preg_replace('%'.$cherche.'%', $remplace, $quoi);
 199         #spip_log("preg_replace : $quoi, $cherche, $remplace, $return",'sqlite.'._LOG_DEBUG);
 200         return $return;
 201 }
 202
 203 /**
 204  * Extrait une langue d'un texte <multi>[fr] xxx [en] yyy</multi>
 205  *
 206  * @param string $quoi le texte contenant ou non un multi
 207  * @param string $lang la langue a extraire
 208  * @return string, l'extrait trouve.
 209 **/
 210 function _sqlite_func_extraire_multi($quoi, $lang) {
 211         if (!defined('_EXTRAIRE_MULTI'))
 212                 include_spip('inc/filtres');
 213         if (!function_exists('approcher_langue'))
 214                 include_spip('inc/lang');
 215         if (preg_match_all(_EXTRAIRE_MULTI, $quoi, $regs, PREG_SET_ORDER)) {
 216                 foreach ($regs as $reg) {
 217                         // chercher la version de la langue courante
 218                         $trads = extraire_trads($reg[1]);
 219                         if ($l = approcher_langue($trads, $lang)) {
 220                                 $trad = $trads[$l];
 221                         } else {
 222                                 $trad = reset($trads);
 223                         }
 224                         $quoi = str_replace($reg[0], $trad, $quoi);
 225                 }
 226         }
 227         return $quoi;
 228 }
 229
 230
 231 // http://doc.spip.org/@_sqlite_func_rand
 232 function _sqlite_func_rand() {
 233         return rand();
 234 }
 235
 236
 237 // http://doc.spip.org/@_sqlite_func_right
 238 function _sqlite_func_right ($s, $length) {
 239         return substr($s,0 - $length);
 240 }
 241
 242
 243 // http://doc.spip.org/@_sqlite_func_regexp_match
 244 function _sqlite_func_regexp_match($cherche, $quoi) {
 245         $return = preg_match('%'.$cherche.'%', $quoi);
 246         #spip_log("regexp_replace : $quoi, $cherche, $remplace, $return",'sqlite.'._LOG_DEBUG);
 247         return $return;
 248 }
 249
 250 // http://doc.spip.org/@_sqlite_func_strftime
 251 function _sqlite_func_strftime($date, $conv){
 252         return strftime($conv, is_int($date)?$date:strtotime($date));
 253 }
 254
 255 /**
 256  * Nombre de jour entre 0000-00-00 et $d
 257  * http://doc.spip.org/@_sqlite_func_to_days
 258  * cf http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_to-days
 259  * @param string $d
 260  * @return int
 261  */
 262 function _sqlite_func_to_days ($d) {
 263     $offset = 719528; // nb de jour entre 0000-00-00 et timestamp 0=1970-01-01
 264         $result = $offset+(int)ceil(_sqlite_func_unix_timestamp($d)/(24*3600));
 265         #spip_log("Passage avec TO_DAYS : $d, $result",'sqlite.'._LOG_DEBUG);
 266         return $result;
 267 }
 268
 269 function _sqlite_func_substring($string,$start,$len=null){
 270         // SQL compte a partir de 1, php a partir de 0
 271         $start = ($start>0)?$start-1:$start;
 272         if (is_null($len))
 273                 return substr($string,$start);
 274         else
 275                 return substr($string,$start,$len);
 276 }
 277
 278 /**
 279  * Calcul de la difference entre 2 timestamp, exprimes dans l'unite fournie en premier argument
 280  * emule https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_timestampdiff
 281  * @param string $unit
 282  * @param string $date1
 283  * @param string $date2
 284  * @return int
 285  */
 286 function _sqlite_timestampdiff($unit,$date1,$date2){
 287         // PHP >= 5.3
 288         if (function_exists("date_diff")){
 289                 $d1 = date_create($date1);
 290                 $d2 = date_create($date2);
 291                 $diff = date_diff($d1,$d2);
 292                 $inv = $diff->invert?-1:1;
 293                 switch($unit){
 294                         case "YEAR":
 295                                 return $inv*$diff->y;
 296                         case "QUARTER":
 297                                 return $inv*(4*$diff->y+intval(floor($diff->m/3)));
 298                         case "MONTH":
 299                                 return $inv*(12*$diff->y+$diff->m);
 300                         case "WEEK":
 301                                 return $inv*intval(floor($diff->days/7));
 302                         case "DAY":
 303                                 #var_dump($inv*$diff->days);
 304                                 return $inv*$diff->days;
 305                         case "HOUR":
 306                                 return $inv*(24*$diff->days+$diff->h);
 307                         case "MINUTE":
 308                                 return $inv*((24*$diff->days+$diff->h)*60+$diff->i);
 309                         case "SECOND":
 310                                 return $inv*(((24*$diff->days+$diff->h)*60+$diff->i)*60+$diff->s);
 311                         case "MICROSECOND":
 312                                 return $inv*(((24*$diff->days+$diff->h)*60+$diff->i)*60+$diff->s)*1000000;
 313                 }
 314                 return 0;
 315         }
 316         // PHP < 5.3
 317         else {
 318                 $d1 = strtotime($date1);
 319                 $d2 = strtotime($date2);
 320                 $diff = $d2 - $d1;
 321                 $sign = ($diff<0?-1:1);
 322                 $diff = $sign * $diff;
 323                 switch($unit){
 324                         case "YEAR":
 325                                 $diff = $d2-$d1;
 326                                 return $sign*(date('Y',abs($diff))-date('Y',0));
 327                         case "QUARTER":
 328                                 return $sign*(4*(date('Y',abs($diff))-date('Y',0))+intval(floor((date('m',$diff)-1)/3)));
 329                         case "MONTH":
 330                                 return $sign*((date('Y',$diff)-date('Y',0))*12+date('m',$diff)-1);
 331                         case "WEEK":
 332                                 return intval(floor(($d2-$d1)/3600/7));
 333                         case "DAY":
 334                                 return intval(floor(($d2-$d1)/3600/24));
 335                         case "HOUR":
 336                                 return intval(floor(($d2-$d1)/3600));
 337                         case "MINUTE":
 338                                 return intval(floor(($d2-$d1)/60));
 339                         case "SECOND":
 340                                 return $d2-$d1;
 341                         case "MICROSECOND":
 342                                 return $d2-$d1*1000000;
 343                 }
 344         }
 345 }
 346
 347 // http://doc.spip.org/@_sqlite_func_unix_timestamp
 348 function _sqlite_func_unix_timestamp($d) {
 349         //2005-12-02 20:53:53
 350         #spip_log("Passage avec UNIX_TIMESTAMP : $d",'sqlite.'._LOG_DEBUG);
 351         // mktime ( [int hour [, int minute [, int second [, int month [, int day [, int year [, int is_dst]]]]]]] )
 352         if (!$d) return mktime();
 353         return strtotime($d);
 354         #preg_match(";^([0-9]{4})-([0-9]+)-([0-9]+)\s*(?:([0-9]+)(?::([0-9]+)(?::([0-9]+))?)?)?;", $d, $f);
 355         #return mktime($f[4],$f[5],$f[6],$f[2],$f[3],$f[1]);
 356 }
 357
 358
 359 // http://doc.spip.org/@_sqlite_func_year
 360 function _sqlite_func_year ($d) {
 361         return date("Y",_sqlite_func_unix_timestamp($d));
 362 }
 363
 364
 365 // http://doc.spip.org/@_sqlite_func_vide
 366 function _sqlite_func_vide(){
 367         return;
 368 }
 369
 370
 371
 372 ?>