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<?php
/***************************************************************************\
* SPIP, Systeme de publication pour l'internet *
* *
* Copyright (c) 2001-2005 *
* Arnaud Martin, Antoine Pitrou, Philippe Riviere, Emmanuel Saint-James *
* *
* Ce programme est un logiciel libre distribue sous licence GNU/GPL. *
* Pour plus de details voir le fichier COPYING.txt ou l'aide en ligne. *
\***************************************************************************/
//
// Ce fichier ne sera execute qu'une fois
if (defined("_ECRIRE_INC_REVISIONS")) return;
define("_ECRIRE_INC_REVISIONS", "1");
$GLOBALS['agregation_versions'] = 10;
function separer_paras($texte, $paras = "") {
if (!$paras) $paras = array();
while (preg_match("/(\r\n?){2,}|\n{2,}/", $texte, $regs)) {
$p = strpos($texte, $regs[0]) + strlen($regs[0]);
$paras[] = substr($texte, 0, $p);
$texte = substr($texte, $p);
}
if ($texte) $paras[] = $texte;
return $paras;
}
function replace_fragment($id_article, $version_min, $version_max, $id_fragment, $fragment) {
global $flag_gz;
$fragment = serialize($fragment);
$compress = 0;
if ($flag_gz) {
$s = gzcompress($fragment);
if (strlen($s) < strlen($fragment)) {
//echo "gain gz: ".(100 - 100 * strlen($s) / strlen($fragment))."%<br />";
$compress = 1;
$fragment = $s;
}
}
// Attention a bien echapper le $fragment qui est en binaire
return "($id_article, $version_min, $version_max, $id_fragment, $compress, '"
.mysql_escape_string($fragment)."')";
}
function exec_replace_fragments($replaces) {
if (count($replaces)) {
$query = "REPLACE spip_versions_fragments (id_article, version_min, version_max, id_fragment, compress, fragment) ".
"VALUES ".join(", ", $replaces);
spip_query($query);
}
}
function exec_delete_fragments($id_article, $deletes) {
if (count($deletes)) {
$query = "DELETE FROM spip_versions_fragments WHERE id_article=$id_article AND ((".
join(") OR (", $deletes)."))";
spip_query($query);
}
}
//
// Ajouter les fragments de la derniere version (tableau associatif id_fragment => texte)
//
function ajouter_fragments($id_article, $id_version, $fragments) {
global $flag_gz, $agregation_versions;
$replaces = array();
foreach ($fragments as $id_fragment => $texte) {
$nouveau = true;
// Recuperer la version la plus recente
$query = "SELECT compress, fragment, version_min, version_max FROM spip_versions_fragments ".
"WHERE id_article=$id_article AND id_fragment=$id_fragment AND version_min<=$id_version ".
"ORDER BY version_min DESC LIMIT 0,1";
$result = spip_query($query);
if ($row = spip_fetch_array($result)) {
$fragment = $row['fragment'];
$version_min = $row['version_min'];
if ($row['compress'] > 0) $fragment = gzuncompress($fragment);
$fragment = unserialize($fragment);
if (is_array($fragment)) {
unset($fragment[$id_version]);
// Si le fragment n'est pas trop gros, prolonger celui-ci
$nouveau = count($fragment) >= $agregation_versions
&& strlen($row['fragment']) > 1000;
}
}
if ($nouveau) {
$fragment = array($id_version => $texte);
$version_min = $id_version;
}
else {
// Ne pas dupliquer les fragments non modifies
$modif = true;
for ($i = $id_version - 1; $i >= $version_min; $i--) {
if (isset($fragment[$i])) {
$modif = ($fragment[$i] != $texte);
break;
}
}
if ($modif) $fragment[$id_version] = $texte;
}
// Preparer l'enregistrement du fragment
$replaces[] = replace_fragment($id_article, $version_min, $id_version, $id_fragment, $fragment);
}
exec_replace_fragments($replaces);
}
//
// Supprimer tous les fragments d'un article lies a un intervalle de versions
// (essaie d'eviter une trop grande fragmentation)
//
function supprimer_fragments($id_article, $version_debut, $version_fin) {
global $flag_gz, $agregation_versions;
$replaces = array();
$deletes = array();
// D'abord, vider les fragments inutiles
$query = "DELETE FROM spip_versions_fragments WHERE id_article=$id_article ".
"AND version_min>=$version_debut AND version_max<=$version_fin";
spip_query($query);
// Fragments chevauchant l'ensemble de l'intervalle, s'ils existent
$query = "SELECT id_fragment, compress, fragment, version_min, version_max FROM spip_versions_fragments ".
"WHERE id_article=$id_article AND version_min<$version_debut AND version_max>$version_fin";
$result = spip_query($query);
while ($row = spip_fetch_array($result)) {
$id_fragment = $row['id_fragment'];
$fragment = $row['fragment'];
if ($row['compress'] > 0) $fragment = gzuncompress($fragment);
$fragment = unserialize($fragment);
for ($i = $version_fin; $i >= $version_debut; $i--) {
if (isset($fragment[$i])) {
// Recopier le dernier fragment si implicite
if (!isset($fragment[$version_fin + 1]))
$fragment[$version_fin + 1] = $fragment[$i];
unset($fragment[$i]);
}
}
$replaces[] = replace_fragment($id_article,
$row['version_min'], $row['version_max'], $id_fragment, $fragment);
}
// Fragments chevauchant le debut de l'intervalle, s'ils existent
$query = "SELECT id_fragment, compress, fragment, version_min, version_max FROM spip_versions_fragments ".
"WHERE id_article=$id_article AND version_min<$version_debut ".
"AND version_max>=$version_debut AND version_max<=$version_fin";
$result = spip_query($query);
$deb_fragment = array();
while ($row = spip_fetch_array($result)) {
$id_fragment = $row['id_fragment'];
$fragment = $row['fragment'];
$version_min = $row['version_min'];
$version_max = $row['version_max'];
if ($row['compress'] > 0) $fragment = gzuncompress($fragment);
$fragment = unserialize($fragment);
for ($i = $version_debut; $i <= $version_max; $i++) {
if (isset($fragment[$i])) unset($fragment[$i]);
}
// Stocker temporairement le fragment pour agregation
$deb_fragment[$id_fragment] = $fragment;
// Ajuster l'intervalle des versions
$deb_version_min[$id_fragment] = $version_min;
$deb_version_max[$id_fragment] = $version_debut - 1;
}
// Fragments chevauchant la fin de l'intervalle, s'ils existent
$query = "SELECT id_fragment, compress, fragment, version_min, version_max FROM spip_versions_fragments ".
"WHERE id_article=$id_article AND version_max>$version_fin ".
"AND version_min>=$version_debut AND version_min<=$version_fin";
$result = spip_query($query);
while ($row = spip_fetch_array($result)) {
$id_fragment = $row['id_fragment'];
$fragment = $row['fragment'];
$version_min = $row['version_min'];
$version_max = $row['version_max'];
if ($row['compress'] > 0) $fragment = gzuncompress($fragment);
$fragment = unserialize($fragment);
for ($i = $version_fin; $i >= $version_min; $i--) {
if (isset($fragment[$i])) {
// Recopier le dernier fragment si implicite
if (!isset($fragment[$version_fin + 1]))
$fragment[$version_fin + 1] = $fragment[$i];
unset($fragment[$i]);
}
}
// Virer l'ancien enregistrement (la cle primaire va changer)
$deletes[] = "id_fragment=$id_fragment AND version_min=$version_min";
// Essayer l'agregation
$agreger = false;
if (isset($deb_fragment[$id_fragment])) {
$agreger = (count($deb_fragment[$id_fragment]) + count($fragment) <= $agregation_versions);
if ($agreger) {
$fragment = $deb_fragment[$id_fragment] + $fragment;
$version_min = $deb_version_min[$id_fragment];
}
else {
$replaces[] = replace_fragment($id_article,
$deb_version_min[$id_fragment], $deb_version_max[$id_fragment],
$id_fragment, $deb_fragment[$id_fragment]);
}
unset($deb_fragment[$id_fragment]);
}
if (!$agreger) {
// Ajuster l'intervalle des versions
$version_min = $version_fin + 1;
}
$replaces[] = replace_fragment($id_article, $version_min, $version_max, $id_fragment, $fragment);
}
// Ajouter fragments restants
if (is_array($deb_fragment) && count($deb_fragment) > 0) {
foreach ($deb_fragment as $id_fragment => $fragment) {
$replaces[] = replace_fragment($id_article,
$deb_version_min[$id_fragment], $deb_version_max[$id_fragment],
$id_fragment, $deb_fragment[$id_fragment]);
}
}
exec_replace_fragments($replaces);
exec_delete_fragments($id_article, $deletes);
}
//
// Recuperer les fragments d'une version donnee
// renvoie un tableau associatif (id_fragment => texte)
//
function recuperer_fragments($id_article, $id_version) {
$fragments = array();
if ($id_version == 0) return array();
$query = "SELECT id_fragment, version_min, compress, fragment FROM spip_versions_fragments ".
"WHERE id_article=$id_article AND version_min<=$id_version AND version_max>=$id_version";
$result = spip_query($query);
while ($row = spip_fetch_array($result)) {
$id_fragment = $row['id_fragment'];
$version_min = $row['version_min'];
$fragment = $row['fragment'];
if ($row['compress'] > 0) $fragment = gzuncompress($fragment);
$fragment = unserialize($fragment);
for ($i = $id_version; $i >= $version_min; $i--) {
if (isset($fragment[$i])) {
$fragments[$id_fragment] = $fragment[$i];
break;
}
}
}
return $fragments;
}
//
// Apparier des paragraphes deux a deux entre une version originale
// et une version modifiee
//
function apparier_paras($src, $dest, $flou = true) {
$src_dest = array();
$dest_src = array();
$t1 = $t2 = array();
$md1 = $md2 = array();
$gz_min1 = $gz_min2 = array();
$gz_trans1 = $gz_trans2 = array();
$l1 = $l2 = array();
// Nettoyage de la ponctuation pour faciliter l'appariement
foreach($src as $key => $val) {
$t1[$key] = preg_replace("/[[:punct:][:space:]]+/", " ", $val);
}
foreach($dest as $key => $val) {
$t2[$key] = preg_replace("/[[:punct:][:space:]]+/", " ", $val);
}
// Premiere passe : chercher les correspondance exactes
foreach($t1 as $key => $val) $md1[$key] = md5($val);
foreach($t2 as $key => $val) $md2[md5($val)][$key] = $key;
foreach($md1 as $key1 => $h) {
if (count($md2[$h])) {
$key2 = reset($md2[$h]);
if ($t1[$key1] == $t2[$key2]) {
$src_dest[$key1] = $key2;
$dest_src[$key2] = $key1;
unset($t1[$key1]);
unset($t2[$key2]);
unset($md2[$h][$key2]);
}
}
}
if ($flou) {
// Deuxieme passe : recherche de correlation par test de compressibilite
foreach($t1 as $key => $val) {
$l1[$key] = strlen(gzcompress($val));
}
foreach($t2 as $key => $val) {
$l2[$key] = strlen(gzcompress($val));
}
foreach($t1 as $key1 => $s1) {
foreach($t2 as $key2 => $s2) {
$r = strlen(gzcompress($s1.$s2));
$taux = 1.0 * $r / ($l1[$key1] + $l2[$key2]);
if (!$gz_min1[$key1] || $gz_min1[$key1] > $taux) {
$gz_min1[$key1] = $taux;
$gz_trans1[$key1] = $key2;
}
if (!$gz_min2[$key2] || $gz_min2[$key2] > $taux) {
$gz_min2[$key2] = $taux;
$gz_trans2[$key2] = $key1;
}
}
}
// Depouiller les resultats de la deuxieme passe :
// ne retenir que les correlations reciproques
foreach($gz_trans1 as $key1 => $key2) {
if ($gz_trans2[$key2] == $key1 && $gz_min1[$key1] < 0.9) {
$src_dest[$key1] = $key2;
$dest_src[$key2] = $key1;
}
}
}
// Retourner les mappings
return array($src_dest, $dest_src);
}
//
// Recuperer les champs d'une version donnee
//
function recuperer_version($id_article, $id_version) {
$query = "SELECT champs FROM spip_versions ".
"WHERE id_article=$id_article AND id_version=$id_version";
$result = spip_query($query);
if (!($row = spip_fetch_array($result))) return false;
$fragments = recuperer_fragments($id_article, $id_version);
$champs = unserialize($row['champs']);
$textes = array();
foreach ($champs as $nom_champ => $code) {
$textes[$nom_champ] = "";
$code = explode(' ', $code);
foreach ($code as $id_fragment) {
$textes[$nom_champ] .= $fragments[$id_fragment];
}
}
return $textes;
}
function supprimer_versions($id_article, $version_min, $version_max) {
$query = "DELETE FROM spip_versions WHERE id_article=$id_article ".
"AND id_version>=$version_min AND id_version<=$version_max";
spip_query($query);
supprimer_fragments($id_article, $version_min, $version_max);
}
//
// Ajouter une version a un article
//
function ajouter_version($id_article, $champs, $titre_version = "") {
global $connect_id_auteur;
// Eviter les validations entremelees
$lock = "ajout_version $id_article";
spip_get_lock($lock, 10);
// Examiner la derniere version
$query = "SELECT id_version, (id_auteur=$connect_id_auteur AND date > DATE_SUB(NOW(), INTERVAL 1 HOUR) AND permanent!='oui') AS flag ".
"FROM spip_versions WHERE id_article=$id_article ".
"ORDER BY id_version DESC LIMIT 0,1";
$result = spip_query($query);
if ($row = spip_fetch_array($result)) {
$nouveau = !$row['flag'];
$id_version = $row['id_version'];
if ($nouveau) $id_version_new = $id_version + 1;
else $id_version_new = $id_version;
}
else {
$nouveau = true;
$id_version_new = 1;
}
$query = "SELECT id_fragment FROM spip_versions_fragments ".
"WHERE id_article=$id_article ORDER BY id_fragment DESC LIMIT 0,1";
$result = spip_query($query);
if ($row = spip_fetch_array($result))
$id_fragment_next = $row['id_fragment'] + 1;
else
$id_fragment_next = 1;
// Generer les nouveaux fragments
$fragments = array();
$paras_old = recuperer_fragments($id_article, $id_version);
$paras_new = $paras_champ = array();
foreach ($champs as $nom_champ => $texte) {
$codes[$nom_champ] = array();
$paras_new = separer_paras($texte, $paras_new);
$paras_champ[$nom_champ] = count($paras_new);
}
// Apparier les fragments de maniere optimale
$n = count($paras_new);
if ($n) {
// Tables d'appariement dans les deux sens
list($trans, $trans_rev) = apparier_paras($paras_old, $paras_new);
reset($champs);
$nom_champ = '';
for ($i = 0; $i < $n; $i++) {
while ($i >= $paras_champ[$nom_champ]) list($nom_champ, ) = each($champs);
// Lier au fragment existant si possible, sinon creer un nouveau fragment
if (isset($trans_rev[$i])) $id_fragment = $trans_rev[$i];
else $id_fragment = $id_fragment_next++;
$codes[$nom_champ][] = $id_fragment;
$fragments[$id_fragment] = $paras_new[$i];
}
}
foreach ($champs as $nom_champ => $t) {
$codes[$nom_champ] = join(' ', $codes[$nom_champ]);
if (!strlen($codes[$nom_champ])) unset($codes[$nom_champ]);
}
// Enregistrer les modifications
ajouter_fragments($id_article, $id_version_new, $fragments);
if (!$codes) $codes = array();
$codes = addslashes(serialize($codes));
$permanent = empty($titre_version) ? 'non' : 'oui';
$titre_version = addslashes($titre_version);
if ($nouveau) {
$query = "INSERT spip_versions (id_article, id_version, titre_version, permanent, date, id_auteur, champs) ".
"VALUES ($id_article, $id_version_new, '$titre_version', '$permanent', NOW(), '$connect_id_auteur', '$codes')";
spip_query($query);
}
else {
$query = "UPDATE spip_versions SET date=NOW(), id_auteur=$connect_id_auteur, champs='$codes', ".
"permanent='$permanent', titre_version='$titre_version' ".
"WHERE id_article=$id_article AND id_version=$id_version";
spip_query($query);
}
$query = "UPDATE spip_articles SET id_version=$id_version_new WHERE id_article=$id_article";
spip_query($query);
spip_release_lock($lock);
return $id_version_new;
}
// les textes "diff" ne peuvent pas passer dans propre directement,
// car ils contiennent des <span> et <div> parfois mal places
function propre_diff($texte) {
$span_diff = array();
if (preg_match_all(',</?(span|div) (class|rem)="diff-[^>]+>,', $texte, $regs, PREG_SET_ORDER)) {
foreach ($regs as $c => $reg)
$texte = str_replace($reg[0], '@@@SPIP_DIFF'.$c.'@@@', $texte);
}
// [ ...<span diff> -> lien ]
// < tag <span diff> >
$texte = preg_replace(',<([^>]*@@@SPIP_DIFF[0-9]+@@@),',
'<\1', $texte);
# attention ici astuce seulement deux @@ finals car on doit eviter
# deux patterns a suivre, afin de pouvoir prendre [ mais eviter [[
$texte = preg_replace(',(^|[^[])[[]([^[\]]*@@@SPIP_DIFF[0-9]+@@),',
'\1[\2', $texte);
$texte = propre($texte);
// un blockquote mal ferme peut gener l'affichage, et title plante safari
$texte = preg_replace(',<(/?(blockquote|title)[^>]*)>,i', '<\1>', $texte);
// Dans les <cadre> c'est un peu plus complique
if (preg_match_all(',<textarea (.*)</textarea>,Uims', $texte, $area, PREG_SET_ORDER)) {
foreach ($area as $reg) {
$remplace = preg_replace(',@@@SPIP_DIFF[0-9]+@@@,', '**', $reg[0]);
if ($remplace <> $reg[0])
$texte = str_replace($reg[0], $remplace, $texte);
}
}
// replacer les valeurs des <span> et <div> diff-
if (is_array($regs))
foreach ($regs as $c => $reg) {
$texte = str_replace('@@@SPIP_DIFF'.$c.'@@@', $reg[0], $texte);
$GLOBALS['les_notes'] = str_replace('@@@SPIP_DIFF'.$c.'@@@', $reg[0], $GLOBALS['les_notes']);
}
return $texte;
}
?>