feat : visiteurs uniques, filtre jours, redirect 404→search, edit_tags (v1.6.16)

- SearchLogParser : visiteurs uniques par terme (IPs distinctes) au lieu de hits bruts (#41)
- SearchLogParser : paramètre $days (7/14), cache distinct par période, filtre logFiles par date (#46)
- admin/searches : boutons 7 j / 14 j, label dynamique, colonne « Visiteurs » (#41, #46)
- URL inconnue / slug absent : redirect 302 /search?q=… au lieu de page 404 (#57)
- edit_tags : masquer abbrev/camel si des valeurs connues existent pour le type (#48)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/SearchLogParser.php

@@ -8,22 +8,25 @@ class SearchLogParser
     private string $vhostBase;
     private string $cacheFile;
     private int    $cacheTtl;
+    private int    $days;
 
     public function __construct(
         string $logDir    = '/var/log/apache2',
         string $vhostBase = '*-access.log',
         string $cacheFile = '',
-        int    $cacheTtl  = 600
+        int    $cacheTtl  = 600,
+        int    $days      = 14
     ) {
         $this->logDir    = rtrim($logDir, '/');
         $this->vhostBase = $vhostBase;
+        $this->days      = max(1, min(30, $days));
         $this->cacheFile = $cacheFile !== ''
             ? $cacheFile
-            : dirname(__DIR__) . '/_cache/search_terms.json';
+            : dirname(__DIR__) . '/_cache/search_terms_' . $this->days . 'd.json';
         $this->cacheTtl  = $cacheTtl;
     }
 
-    /** @return array<string,int> terme => nombre d'occurrences, trié desc */
+    /** @return array<string,int> terme => visiteurs uniques, trié desc */
     public function topTerms(int $limit = 100): array
     {
         if ($this->cacheValid()) {
@@ -33,9 +36,14 @@ class SearchLogParser
             }
         }
 
-        $counts = [];
+        $visitors = [];  // terme => [ip => true]
         foreach ($this->logFiles() as $file) {
-            $this->parseFile($file, $counts);
+            $this->parseFile($file, $visitors);
+        }
+
+        $counts = [];
+        foreach ($visitors as $term => $ips) {
+            $counts[$term] = count($ips);
         }
         arsort($counts);
 
@@ -61,6 +69,7 @@ class SearchLogParser
     {
         $pattern = $this->logDir . '/' . $this->vhostBase;
         $files   = [];
+        $cutoff  = time() - $this->days * 86400;
 
         // Fichiers correspondant au pattern de base (courants + rotations incluses si glob)
         $bases = glob($pattern) ?: [];
@@ -75,6 +84,9 @@ class SearchLogParser
                 if (!is_readable($path)) {
                     continue;
                 }
+                if (@filemtime($path) < $cutoff) {
+                    continue;
+                }
                 if (str_ends_with($path, '.tar.gz')) {
                     $files[] = ['path' => $path, 'type' => 'tgz'];
                 } elseif (str_ends_with($path, '.gz')) {
@@ -88,7 +100,7 @@ class SearchLogParser
         return $files;
     }
 
-    private function parseFile(array $file, array &$counts): void
+    private function parseFile(array $file, array &$visitors): void
     {
         if ($file['type'] === 'tgz') {
             try {
@@ -99,7 +111,7 @@ class SearchLogParser
                         continue;
                     }
                     foreach (explode("\n", $content) as $line) {
-                        $this->parseLine($line, $counts);
+                        $this->parseLine($line, $visitors);
                     }
                 }
             } catch (\Exception $e) {
@@ -113,7 +125,7 @@ class SearchLogParser
             while (!gzeof($h)) {
                 $line = gzgets($h, 8192);
                 if ($line !== false) {
-                    $this->parseLine($line, $counts);
+                    $this->parseLine($line, $visitors);
                 }
             }
             gzclose($h);
@@ -123,28 +135,29 @@ class SearchLogParser
                 return;
             }
             while (($line = fgets($h)) !== false) {
-                $this->parseLine($line, $counts);
+                $this->parseLine($line, $visitors);
             }
             fclose($h);
         }
     }
 
-    private function parseLine(string $line, array &$counts): void
+    private function parseLine(string $line, array &$visitors): void
     {
         if (!str_contains($line, 'GET /search?')) {
             return;
         }
-        if (!preg_match('/"GET \/search\?([^"]*) HTTP\//', $line, $m)) {
+        if (!preg_match('/^(\S+) \S+ \S+ \[[^\]]+\] "GET \/search\?([^"]*) HTTP\//', $line, $m)) {
             return;
         }
 
-        parse_str($m[1], $params);
+        $ip = $m[1];
+        parse_str($m[2], $params);
         $q = trim(urldecode($params['q'] ?? ''));
 
         if ($q === '' || mb_strlen($q) > 200) {
             return;
         }
         $q = mb_strtolower($q);
-        $counts[$q] = ($counts[$q] ?? 0) + 1;
+        $visitors[$q][$ip] = true;
     }
 }