Optimize search result fetching to display posts/topics

app/Models/Search/ActionP.php

@@ -59,7 +59,7 @@ class ActionP extends Method
             $list = $this->c->DB->query($query, $vars)->fetchAll(PDO::FETCH_COLUMN);
         }
 
-        $this->model->numPages = (int) \ceil((\count($list) ?: 1) / $this->c->user->disp_posts);
+        $this->model->numPages = (int) \ceil(($this->model->count($list) ?: 1) / $this->c->user->disp_posts);
 
         // нет такой страницы в результате поиска
         if (! $this->model->hasPage()) {
@@ -69,7 +69,7 @@ class ActionP extends Method
             return [];
         }
 
-        $this->model->idsList = \array_slice(
+        $this->model->idsList = $this->model->slice(
             $list,
             ($this->model->page - 1) * $this->c->user->disp_posts,
             (int) $this->c->user->disp_posts

app/Models/Search/ActionT.php

@@ -115,7 +115,7 @@ class ActionT extends Method
             $list = $this->c->DB->query($query, $vars)->fetchAll(PDO::FETCH_COLUMN);
         }
 
-        $this->model->numPages = (int) \ceil((\count($list) ?: 1) / $this->c->user->disp_topics);
+        $this->model->numPages = (int) \ceil(($this->model->count($list) ?: 1) / $this->c->user->disp_topics);
 
         // нет такой страницы в результате поиска
         if (! $this->model->hasPage()) {
@@ -125,7 +125,7 @@ class ActionT extends Method
             return [];
         }
 
-        $this->model->idsList = \array_slice(
+        $this->model->idsList = $this->model->slice(
             $list,
             ($this->model->page - 1) * $this->c->user->disp_topics,
             (int) $this->c->user->disp_topics

app/Models/Search/Execute.php

@@ -74,7 +74,7 @@ class Execute extends Method
             && $delimiter <= $row['search_time']
         ) {
             $result                    = \explode("\n", $row['search_data']);
-            $this->model->queryIds     = '' == $result[0] ? [] : \array_map('\\intval', \explode(',', $result[0]));
+            $this->model->queryIds     = $result[0];
             $this->model->queryNoCache = false;
 
             return true;

app/Models/Search/Search.php

@@ -141,4 +141,48 @@ class Search extends Model
     {
         return \preg_match('%' . self::CJK_REGEX . '%u', $word) ? true : false; //?????
     }
+
+    /**
+     * Выбирает срез из массива/строки номеров через запятую
+     */
+    public function slice(string|array $data, int $offset, int $length): array
+    {
+        if (\is_array($data)) {
+            return \array_slice($data, $offset, $length);
+        }
+
+        $p = 0;
+        $i = 0;
+
+        while ($i < $offset) {
+            if (false === ($p = \strpos($data, ',', $p))) {
+                return [];
+            }
+
+            ++$p;
+            ++$i;
+        }
+
+        $e       = $p;
+        $offset += $length;
+
+        while ($i < $offset) {
+            if (false === ($e = \strpos($data, ',', $e))) {
+                return \array_map('\\intval', \explode(',', \substr($data, $p)));
+            }
+
+            ++$e;
+            ++$i;
+        }
+
+        return \array_map('\\intval', \explode(',', \substr($data, $p, $e - $p - 1)));
+    }
+
+    /**
+     * Подсчитывает число элементов массива/строки номеров через запятую
+     */
+    public function count(string|array $data): int
+    {
+        return \is_array($data) ? \count($data) : \substr_count($data, ',') + 1;
+    }
 }