Add Formatters

Signed-off-by: davidarendsen <davidarendsen@hey.com>

src/Formatters.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace Arendsen\FluxQueryBuilder;
+
+class Formatters {
+
+    public static function valueToString($value): string
+    {
+        if(is_string($value))
+        {
+            return '"' . $value . '"';
+        }
+        elseif(is_bool($value))
+        {
+            return $value ? 'true' : 'false';
+        }
+
+        return $value;
+    }
+
+    public static function toFluxArrayString(array $array): string
+    {
+        $array = array_map(function($column) {
+            return self::valueToString($column);
+		}, $array);
+
+        return implode(', ', $array);
+    }
+
+    public static function toFluxAssociativeArrayString(array $array): string
+    {
+        array_walk($array, function(&$value, $key) {
+			$value = $key . ': ' . self::valueToString($value);
+		});
+
+        return implode(', ', $array);
+    }
+
+}