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Valider 5cdbd7d2 rédigé par renato's avatar renato
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The search engine is now able to search with words in AND and NOT. 

The syntax is:
+word to receive only results where word is present
-word to receive only results where word is not present
parent ad6aedf0
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avec 139 ajouts et 26 suppressions
ecrire/inc/indexation.php
+ 139
− 26
Voir le fichier @ 5cdbd7d2
......@@ -164,12 +164,9 @@ function mots_indexation($texte, $min_long = 3) {
include_spip('inc/charsets');
include_spip('inc/texte');
// Point d'entree pour traiter le texte avant indexation
$texte = pipeline('pre_indexation', $texte);
// Recuperer les parametres des modeles
$texte = traiter_modeles($texte, true);
// Supprimer les tags HTML
$texte = preg_replace(',<.*>,Ums',' ',$texte);
......@@ -181,7 +178,8 @@ function mots_indexation($texte, $min_long = 3) {
$texte_c = ' '.translitteration_complexe ($texte, 'AUTO', true);
else
$texte_c = '';
$texte = translitteration($texte).$texte_c;
$texte = translitteration($texte);
if($texte!=trim($texte_c)) $texte .= $texte_c;
# NB. tous les caracteres non translitteres sont retournes en utf-8
// OPTIONNEL // Gestion du tiret '-' :
......@@ -189,9 +187,11 @@ function mots_indexation($texte, $min_long = 3) {
# $texte = preg_replace(',(\w+)-(\w+),', '\1 \2 \1\2', $texte);
// Supprimer les caracteres de ponctuation, les guillemets...
$e = "],:;*\"!\r\n\t\\/)}{[|@<>$%'`?\~.^+(-";
$e = "],:;*\"!\r\n\t\\/)}{[|@<>$%'`?\~.^(";
$texte = strtr($texte, $e, ereg_replace('.', ' ', $e));
//delete +\- not at the beginning of a word
$texte = preg_replace(",(?:\S)[\-+],"," ",$texte);
// Cas particulier : sigles d'au moins deux lettres
$texte = preg_replace("/ ([A-Z][0-9A-Z]{1,".($min_long - 1)."}) /",
' \\1___ ', $texte.' ');
......@@ -723,12 +723,26 @@ AND rec.id_table = $id_table",
// http://doc.spip.org/@requete_dico
function requete_dico($val) {
$min_long = 3;
preg_match(",^([+\-]?)(.*),",$val,$mod);
switch($mod[1]) {
case '':
$mode = "OR";
break;
case '+':
$mode = "AND";
break;
case '-':
$mode = "NOT";
break;
}
//set logical operator between the various where parts
$val = $mod[2];
// cas normal
if (strlen($val) > $min_long) {
return array("dico LIKE "._q($val. "%"), "dico = " . _q($val));
return array("dico LIKE "._q($val. "%"), "dico = " . _q($val),$mode);
} else
return array("dico = "._q($val."___"), "dico = "._q($val."___"));
return array("dico = "._q($val."___"), "dico = "._q($val."___"),$mode);
}
......@@ -740,16 +754,16 @@ function requete_hash ($rech) {
$s = mots_indexation($rech);
unset($dico);
unset($h);
// cherche les mots dans le dico
while (list(, $val) = each($s)) {
list($rq, $rq_strict) = requete_dico ($val);
list($rq, $rq_strict,$mode) = requete_dico ($val);
if ($rq)
$dico[] = $rq;
$dico[$mode][$val] = $rq;
if ($rq_strict)
$dico_strict[] = $rq_strict;
$dico_strict[$mode][$val] = $rq_strict;
}
// Attention en MySQL 3.x il faut passer par HEX(hash)
// alors qu'en MySQL 4.1 c'est interdit !
$vers = spip_query("SELECT VERSION() AS v");
......@@ -764,29 +778,88 @@ function requete_hash ($rech) {
}
// compose la recherche dans l'index
if ($dico_strict) {
$result2 = spip_query("SELECT $select_hash FROM spip_index_dico WHERE " .join(" OR ", $dico_strict));
$cond = "";
if ($dico_strict["OR"]) $cond = join(" OR ", $dico_strict["OR"]);
if ($cond) {
$result2 = spip_query("SELECT $select_hash FROM spip_index_dico WHERE ".$cond);
while ($row2 = spip_fetch_array($result2))
$h_strict[] = $hex_fmt.$row2['h'];
}
if ($dico) {
$result2 = spip_query("SELECT $select_hash FROM spip_index_dico WHERE " .join(" OR ", $dico));
$cond = "";
if ($dico_strict["AND"]) $cond = join(" OR ", $dico_strict["AND"]);
if ($cond) {
$result2 = spip_query("SELECT $select_hash FROM spip_index_dico WHERE ".$cond);
while ($row2 = spip_fetch_array($result2))
$h_strict_and[] = $hex_fmt.$row2['h'];
}
$cond = "";
if ($dico["OR"]) $cond = join(" OR ", $dico["OR"]);
if ($cond) {
$result2 = spip_query("SELECT $select_hash FROM spip_index_dico WHERE ".$cond);
while ($row2 = spip_fetch_array($result2))
$h[] = $hex_fmt.$row2['h'];
}
$cond = "";
if ($dico["AND"]) $cond = join(" OR ", $dico["AND"]);
if ($cond) {
$result2 = spip_query("SELECT $select_hash,dico FROM spip_index_dico WHERE ".$cond);
while ($row2 = spip_fetch_array($result2)) {
//store the condition that selected the hash (the word typed by the user)
foreach($dico["AND"] as $key=>$val) {
$mot_and = substr($key,1);
if(strpos($row2['dico'],$mot_and)===0)
$h_and[$mot_and][] = $hex_fmt.$row2['h'];
}
}
}
$cond = "";
if ($dico["NOT"]) $cond = join(" OR ", $dico["NOT"]);
if ($cond) {
$result2 = spip_query("SELECT $select_hash FROM spip_index_dico WHERE ".$cond);
while ($row2 = spip_fetch_array($result2))
$h_not[] = $hex_fmt.$row2['h'];
}
if ($h_strict)
$hash_recherche_strict = join(",", $h_strict);
else
$hash_recherche_strict = "0";
if ($h_strict_and)
$hash_recherche_strict_and = join(",", $h_strict_and);
else
$hash_recherche_strict_and = "0";
if ($h)
$hash_recherche = join(",", $h);
else
$hash_recherche = "0";
return array($hash_recherche, $hash_recherche_strict);
if ($h_and) {
foreach($h_and as $key=>$val)
$hash_recherche_and[$key] = join(",", $h_and[$key]);
} else
$hash_recherche_and = "0";
if ($h_not)
$hash_recherche_not = join(",", $h_not);
else
$hash_recherche_not = "0";
return array($hash_recherche, $hash_recherche_strict, $hash_recherche_not, $hash_recherche_and, $hash_recherche_strict_and);
}
//
......@@ -815,23 +888,63 @@ function prepare_recherche($recherche, $primary = 'id_article', $id_table='artic
if (!$cache[$recherche][$primary]) {
if (!$cache[$recherche]['hash'])
$cache[$recherche]['hash'] = requete_hash($recherche);
list($hash_recherche, $hash_recherche_strict)
list($hash_recherche, $hash_recherche_strict, $hash_recherche_not, $hash_recherche_and, $hash_recherche_strict_and)
= $cache[$recherche]['hash'];
$strict = array();
if ($hash_recherche_strict)
foreach (split(',',$hash_recherche_strict) as $h)
$strict[$h] = 99;
if ($hash_recherche_strict_and)
foreach (split(',',$hash_recherche_strict_and) as $h)
$strict[$h] = 99;
$index_id_table = id_index_table($nom_table);
$points = array();
$s = spip_query("SELECT hash,points,id_objet as id FROM spip_index WHERE hash IN ($hash_recherche) AND id_table='$index_id_table'");
$objet_and = array();
$object_not = array();
if($hash_recherche_and) {
//$hash_recherche_and is an array of mots=>comma separated hashes
$list_hashes = join(",",$hash_recherche_and);
$pow = 1;
foreach($hash_recherche_and as $key=>$val) {
$hash_groupes[] = "$pow*".calcul_mysql_in("hash",$val);
$pow *= 2;
}
$count_groupes = join(" + ",$hash_groupes);
while ($r = spip_fetch_array($s))
$points[$r['id']]
+= (1 + $strict[$r['hash']]) * $r['points'];
spip_free_result($s);
arsort($points, SORT_NUMERIC);
$s = spip_query("SELECT id_objet as id,COUNT(DISTINCT $count_groupes) as count_groupes FROM spip_index WHERE id_table='$index_id_table' AND hash IN ($list_hashes) GROUP BY id HAVING count_groupes=".count($hash_recherche_and));
//if no ids are found, pass at least id = 0 in order to exclude any result
$objet_and[] = 0;
while ($r = spip_fetch_array($s))
$objet_and[]=$r['id'];
}
if($hash_recherche_not) {
$s = spip_query("SELECT DISTINCT id_objet as id FROM spip_index WHERE hash IN ($hash_recherche_not) AND id_table='$index_id_table'");
while ($r = spip_fetch_array($s))
$objet_not[]=$r['id'];
}
if(count($objet_and))
$list_and = " AND id_objet IN (".join(",",$objet_and).")";
if(count($objet_not))
$list_not = " AND id_objet NOT IN (".join(",",$objet_not).")";
if($hash_recherche) {
$list_hash = " AND hash IN (".$hash_recherche.")";
}
if($list_hash || $list_and || $list_not) {
$query = "SELECT hash,points,id_objet as id FROM spip_index WHERE id_table='$index_id_table'".$list_and.$list_not.$list_hash;
$s = spip_query($query);
while ($r = spip_fetch_array($s))
$points[$r['id']]
+= (1 + $strict[$r['hash']]) * $r['points'];
spip_free_result($s);
arsort($points, SORT_NUMERIC);
}
# calculer le {id_article IN()} et le {... as points}
if (!count($points)) {
......
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