1 files changed, 37 insertions, 0 deletions
diff --git a/src/Models/Tag.php b/src/Models/Tag.php
new file mode 100644
index 0000000..b119fe8
--- /dev/null
+++ b/src/Models/Tag.php
@@ -0,0 +1,37 @@
+<?php
+
+
+namespace Micropoly\Models;
+
+
+use Micropoly\DbQuery;
+
+class Tag
+{
+    private const TAGCLOUD_MAGNITUDES = 5;
+
+    /**
+     * Calculates a tag cloud array to be used as an input to the tagcloud macro
+     * @param array $tagCounts [string tag => int count]
+     * @return array
+     */
+    public static function calcTagCloud(array $tagCounts): array
+    {
+        $tagCounts = array_map("intval", $tagCounts);
+        $tagCounts = array_filter($tagCounts, fn ($count) => $count !== 0);
+
+        if (empty($tagCounts))
+            return [];
+
+        $maxCount = max(array_values($tagCounts));
+        $tagCounts = array_map(fn ($count) => floor($count / ($maxCount+1) * self::TAGCLOUD_MAGNITUDES) + 1, $tagCounts);
+        ksort($tagCounts);
+        return $tagCounts;
+    }
+
+    public static function getTagCounts(\SQLite3 $db): array
+    {
+        return (new DbQuery("SELECT tag, num FROM tagcloud"))
+            ->fetchIndexedValues($db, "num", "tag");
+    }
+}
+\ No newline at end of file