Helper functions 🎅

Author: o-p

src/Support/Logical.php

@@ -0,0 +1,63 @@
+<?php
+namespace JsonLogic\Support;
+
+use Closure;
+use JsonLogic\Configurations as Config;
+
+use function gettype;
+use function strlen;
+
+class Logical
+{
+    private static $handlers = [];
+
+    public static function truthy($logic): bool
+    {
+        switch (gettype($logic)) {
+            case 'string':
+                return (static::handle('string') ?: static::createStringHandler())($logic);
+            case 'array':
+                return (static::handle('array') ?: static::createArrayHandler())($logic);
+            default:
+                return (bool) $logic;
+        }
+    }
+
+    public static function falsy($logic): bool
+    {
+        return !static::truthy($logic);
+    }
+
+    protected static function handle(string $type): ?Closure
+    {
+        return static::$handlers[$type] ?? null;
+    }
+
+    protected static function createStringHandler(): Closure
+    {
+        if (Config::get(Config::TRUTHY_STRING_0)) {
+            static::$handlers['string'] = function (string &$str): bool {
+                return strlen($str) > 0;
+            };
+        } else {
+            static::$handlers['string'] = function (string &$str): bool {
+                return (bool) $str;
+            };
+        }
+        return static::handle('string');
+    }
+
+    protected static function createArrayHandler(): Closure
+    {
+        if (Config::get(Config::TRUTHY_EMPTY_ARRAY)) {
+            static::$handlers['array'] = function (array &$arr): bool {
+                return true;
+            };
+        } else {
+            static::$handlers['array'] = function (array &$arr): bool {
+                return (bool) $arr;
+            };
+        }
+        return static::handle('array');
+    }
+}