Merge pull request #2 from tombenevides/feature/support-postgresql

Support PostgreSQL

docs/drivers.md

@@ -8,3 +8,4 @@ We currently support two drivers:
 
 -   MySQL
 -   Sqlite
+-   PostgreSQL

src/Adapters/PgsqlAdapter.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Flowframe\Trend\Adapters;
+
+use Error;
+
+class PgsqlAdapter extends AbstractAdapter
+{
+    public function format(string $column, string $interval): string
+    {
+        $format = match ($interval) {
+            'minute' => 'YYYY-MM-DD HH24:MI:00',
+            'hour' => 'YYYY-MM-DD HH24:00:00',
+            'day' => 'YYYY-MM-DD',
+            'month' => 'YYYY-MM',
+            'year' => 'YYYY',
+            default => throw new Error('Invalid interval.'),
+        };
+
+        return "to_char({$column}, '{$format}')";
+    }
+}

src/Trend.php

@@ -5,6 +5,7 @@
 use Carbon\CarbonPeriod;
 use Error;
 use Flowframe\Trend\Adapters\MySqlAdapter;
+use Flowframe\Trend\Adapters\PgsqlAdapter;
 use Flowframe\Trend\Adapters\SqliteAdapter;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Support\Carbon;
@@ -157,6 +158,7 @@ protected function getSqlDate(): string
         $adapter = match ($this->builder->getConnection()->getDriverName()) {
             'mysql' => new MySqlAdapter(),
             'sqlite' => new SqliteAdapter(),
+            'pgsql' => new PgsqlAdapter(),
             default => throw new Error('Unsupported database driver.'),
         };