ZugferdMapper -> Load/Save from/to JSON

src/ZugferdMapper.php

@@ -64,6 +64,42 @@ class ZugferdMapper
      */
     protected const KEY_TOCODE = "tocode";
 
+    /**
+     * Load mappings from JSON string
+     *
+     * @param string $json
+     * @return boolean
+     */
+    public static function loadFromJson(string $json): bool
+    {
+        $jsonDecoded = json_decode($json, true);
+
+        if (!is_array($jsonDecoded)) {
+            return false;
+        }
+    }
+
+    /**
+     * Saves mappings to JSON string
+     *
+     * @return string
+     */
+    public static function saveToJson(): string
+    {
+        return json_encode(static::$mappings, JSON_PRETTY_PRINT | JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP);
+    }
+
+    /**
+     * Saves mappings to a JSON file
+     *
+     * @param string $filename
+     * @return boolean
+     */
+    public static function saveToJsonFile(string $filename): bool
+    {
+        return file_put_contents($filename, static::saveToJson()) !== false;
+    }
+
     /**
      * Add a mapping to the internal mapping list
      *

tests/testcases/MapperTest.php

@@ -179,4 +179,20 @@ function () {
             }
         );
     }
+
+    public function testSaveToJsonFile(): void
+    {
+        $filename = getcwd() . "/mappings.json";
+
+        ZugferdMapper::addCurrencyMappingIncoming('EUR', 'EUR');
+        ZugferdMapper::addCurrencyMappingIncoming('DEM', 'DM');
+        ZugferdMapper::addCurrencyMappingOutgoing('EUR', 'EUR');
+        ZugferdMapper::addCurrencyMappingOutgoing('DM', 'DEM');
+        ZugferdMapper::addUnitCodeMappingIncoming('C62', 'STK');
+        ZugferdMapper::addUnitCodeMappingOutgoing('STK', 'C62');
+
+        ZugferdMapper::saveToJsonFile($filename);
+
+        $this->assertTrue(file_exists($filename));
+    }
 }