refactor: replace custom CRM with Monica fork

app/Helpers/DBHelper.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace App\Helpers;
+
+use PDO;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Database\Connection;
+
+class DBHelper
+{
+    /**
+     * Get connection.
+     *
+     * @param  string  $name
+     * @return \Illuminate\Database\Connection
+     */
+    public static function connection($name = null): Connection
+    {
+        return DB::connection($name);
+    }
+
+    /**
+     * Get the version of DB engine.
+     *
+     * @return string|null
+     */
+    public static function version(): ?string
+    {
+        try {
+            return static::connection()->getPdo()->getAttribute(PDO::ATTR_SERVER_VERSION);
+        } catch (\Exception $e) {
+            return null;
+        }
+    }
+
+    /**
+     * Test if db version if greater than $version param.
+     *
+     * @param  string  $version
+     * @return bool
+     */
+    public static function testVersion($version)
+    {
+        return version_compare(static::version(), $version) >= 0;
+    }
+
+    /**
+     * Get list of tables on this instance.
+     *
+     * @return array
+     */
+    public static function getTables()
+    {
+        return DB::select('SELECT table_name as `table_name`
+                FROM information_schema.tables
+                WHERE table_schema = :table_schema
+                AND table_name LIKE :table_prefix', [
+            'table_schema' => static::connection()->getDatabaseName(),
+            'table_prefix' => '%'.static::connection()->getTablePrefix().'%',
+        ]);
+    }
+
+    public static function getTable($name)
+    {
+        return '`'.static::connection()->getTablePrefix().$name.'`';
+    }
+}