Fix date function by database driver

Fix metrics negative variation value display

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 All notable changes to `laravel-metrics` will be documented in this file
 
+## 2.9.3
+
+- Fix date function by database driver
+- Fix metrics negative variation value display 
+
 ## 2.9.2
 
 - Rebase branch 2.9.0-beta-1 onto 2.x

src/DatesFunctions.php

@@ -84,6 +84,17 @@ protected function formatPeriod(string $period): string
         };
     }
 
+    protected function formatDateColumn(): string
+    {
+        $driver = $this->builder->getConnection()->getDriverName();
+
+        return match ($driver) {
+            'mysql' => "date($this->dateColumn)",
+            'pgsql' => "TO_CHAR($this->dateColumn, 'YYYY-MM-DD')",
+            'default' => "strftime('%Y-%m-%d', $this->dateColumn)",
+        };
+    }
+
     protected function formatDate(array $data): array
     {
         return array_map(function ($datum) {

src/LaravelMetrics.php

@@ -454,7 +454,7 @@ protected function metricsData(): mixed
         if (is_array($this->period)) {
             return $this->builder
                 ->selectRaw($this->asData())
-                ->whereBetween(DB::raw("date($this->dateColumn)"), [$this->period[0], $this->period[1]])
+                ->whereBetween(DB::raw($this->formatDateColumn()), [$this->period[0], $this->period[1]])
                 ->first();
         }
 
@@ -516,8 +516,8 @@ protected function trendsData(): Collection
     {
         if (is_array($this->period)) {
             return $this->builder
-                ->selectRaw($this->asData().', '.$this->asLabel("date($this->dateColumn)", false))
-                ->whereBetween(DB::raw("date($this->dateColumn)"), [$this->period[0], $this->period[1]])
+                ->selectRaw($this->asData().', '.$this->asLabel($this->formatDateColumn(), false))
+                ->whereBetween(DB::raw($this->formatDateColumn()), [$this->period[0], $this->period[1]])
                 ->groupBy('label')
                 ->orderBy('label')
                 ->get();
@@ -713,7 +713,7 @@ public function metricsWithVariations(int $previousCount, string $previousPeriod
         } elseif ($value < 0) {
             $result['variation'] = [
                 'type' => 'decrease',
-                'value' => $value,
+                'value' => abs($value),
             ];
         }