fix: unfold failed if key has included '$' (#13)

* fix: unfold failed if key has included '$'

* Create tricky-bulldogs-know.md

.changeset/tricky-bulldogs-know.md

@@ -0,0 +1,5 @@
+---
+"json-origami": patch
+---
+
+fix: unfold failed if key has included '$'

src/unfold.ts

@@ -74,7 +74,7 @@ function omitHeadKey(key: string, opt: FixedUnfoldOption): string {
     if (typeof k === 'number') {
       return opt.arrayIndex === 'dot' ? `${k}` : `\\[${k}\\]`
     }
-    return k
+    return k.replace(/\$/g, '\\$')
   })()
 
   return key.replace(headKey === undefined ? '' : new RegExp(`^${headKey}\\.?`), '')
@@ -113,7 +113,6 @@ function unfoldInternal(entries: Array<[string, unknown]>, opt: FixedUnfoldOptio
   }
 
   const keys = Array.from(new Set(entries.map(([key]) => extractHeadKey(key, opt) as string)))
-
   return keys.reduce((acc, key) => {
     const filteredEntries = entries.filter(([k]) => extractHeadKey(k, opt) === key)
     const unfolded = unfoldInternal(

test/unfold.spec.ts

@@ -96,4 +96,24 @@ describe('unfold', () => {
       }
     ])
   })
+
+  it('include special characters', () => {
+    const kv = {
+      'theme.$color_primary': '#25adc9',
+      'theme.$color_secondary': '#333333',
+      'theme.$color_black': '#191919',
+      'feature.@mention': 'true'
+    }
+
+    expect(unfold(kv)).toEqual({
+      feature: {
+        '@mention': 'true'
+      },
+      theme: {
+        $color_primary: '#25adc9',
+        $color_secondary: '#333333',
+        $color_black: '#191919'
+      }
+    })
+  })
 })