implement optional trends block

config-default.php

@@ -10,6 +10,11 @@ define('BASE_URL', 'https://kvazar.today/');
 define('PAGE_LIMIT', 10);
 define('CACHE_ENABLED', false);
 
+define('TRENDS_ENABLED', false); // alpha
+define('TRENDS_SECONDS_OFFSET', 2592000);
+define('TRENDS_MIN_LENGHT', 4);
+define('TRENDS_LIMIT', 40);
+
 // Database
 define('DB_NAME', '../kvazar.sqlite');
 define('DB_USERNAME', '');

library/sqlite.php

@@ -231,4 +231,38 @@ class SQLite {
       return false;
     }
   }
+
+  public function getTrends(int $offset = 0) {
+
+    try {
+
+      $query = $this->_db->prepare('SELECT `block`.`blockId` AS `block`,
+                                            `namespace`.`hash` AS `namehash`,
+                                            `data`.`time` AS `time`,
+                                            `data`.`key` AS `key`,
+                                            `data`.`value` AS `value`,
+                                            `data`.`txid` AS `txid`
+
+                                            FROM `data`
+                                            JOIN `block` ON (`block`.`blockId` = `data`.`blockId`)
+                                            JOIN `namespace` ON (`namespace`.`nameSpaceId` = `data`.`nameSpaceId`)
+
+                                            WHERE `data`.`ns`      = "0"
+                                            AND   `data`.`time`    >= ' . (int) $offset . '
+                                              -- AND `data`.`deleted` = "0" --
+
+                                            ORDER BY `block`.`blockId` DESC');
+
+      $query->execute();
+
+      $result = $query->fetchAll();
+
+      return $result ? $result : [];
+
+    } catch(PDOException $e) {
+
+      trigger_error($e->getMessage());
+      return false;
+    }
+  }
 }

public/index.php

@@ -61,6 +61,48 @@ if ($ns) {
   $namespaceValue = false;
 }
 
+$trends = [];
+
+if (TRENDS_ENABLED) {
+
+  foreach ($db->getTrends(time() - TRENDS_SECONDS_OFFSET) as $value) {
+
+    foreach ((array) explode(' ', strip_tags(html_entity_decode(nl2br(trim($value['key']))))) as $trend) {
+
+      if (strlen($trend) >= TRENDS_MIN_LENGHT) {
+
+        $trend = strtolower($trend);
+
+        if (isset($trends[$trend])) {
+          $trends[$trend]++;
+        } else {
+          $trends[$trend] = 1;
+        }
+      }
+    }
+
+    foreach ((array) explode(' ', strip_tags(html_entity_decode(nl2br(trim($value['value']))))) as $trend) {
+
+      if (strlen($trend) >= TRENDS_MIN_LENGHT) {
+
+        $trend = strtolower($trend);
+
+        if (isset($trends[$trend])) {
+          $trends[$trend]++;
+        } else {
+          $trends[$trend] = 1;
+        }
+      }
+    }
+  }
+
+  arsort($trends);
+
+  $trends = array_slice($trends, 0, TRENDS_LIMIT);
+
+  $trends = array_flip($trends);
+}
+
 $data = [];
 foreach ($db->getData($ns, $tx, $query, $limit, PAGE_LIMIT) as $value) {
   $data[] = [

public/index.phtml

@@ -44,6 +44,18 @@
   <div class="t-center px-16 pb-36">
     <div class="b-g"></div>
   </div>
+  <?php if ($trends && !$ns && !$tx && !$page && !$q) { ?>
+  <div class="t-center px-16">
+    <div class="mx-a mw-560 px-16">
+    <?php foreach ($trends as $trend) { ?>
+      #<a href="<?php echo BASE_URL; ?>?q=<?php echo $trend; ?>"><?php echo $trend; ?></a>
+    <?php } ?>
+    </div>
+  </div>
+  <div class="t-center px-16 py-27">
+    <div class="b-g"></div>
+  </div>
+  <?php } ?>
   <?php foreach ($data as $item) { ?>
     <div class="t-center px-16">
       <div class="mx-a mw-560 px-16">