feat(addMeta): decorate actions as well as action creators

Author: jedwards1211

README.md

@@ -120,7 +120,7 @@ setConfigEntry('hello', 'world').type // CONFIG.SET_ENTRY
 import {addMeta} from 'mindfront-redux-utils';
 ```
 
-An action creator decorator that assigns additional properties to created actions' `meta`.
+An action or action creator decorator that assigns additional properties to actions' `meta`.
 
 ### Example
 ```es6
@@ -134,9 +134,13 @@ function setEntry(key, value) {
   }
 }
 
-const setConfigEntry = addMeta({domain: 'config'})(setEntry)
+const forConfigDomain = addMeta({domain: 'config'})
+
+const setConfigEntry = forConfigDomain(setEntry)
 
 setConfigEntry('hello', 'world').meta // {key: 'hello', domain: 'config'}
+
+forConfigDomain(setEntry('hello', 'world')).meta // {key: 'hello', domain: 'config'}
 ```
 
 

src/addMeta.js

@@ -1,13 +1,15 @@
 export default function addMeta(meta) {
-  return actionCreator => (...args) => {
-    const action = actionCreator(...args)
+  function addMetaToAction(action) {
     return {
-      ...action,
+    ...action,
       meta: {
-        ...action.meta,
-        ...meta
-      }
+    ...action.meta,
+    ...meta,
+    }
     }
   }
+  return actionOrCreator => actionOrCreator instanceof Function
+    ? (...args) => addMetaToAction(actionOrCreator(...args))
+    : addMetaToAction(actionOrCreator)
 }
 

test/addMetaTest.js

@@ -40,5 +40,26 @@ describe('addMeta', () => {
       meta: {domain: 'config'},
     })
   })
+  it('works directly on actions instead of action creators', () => {
+    function setEntry(key, value) {
+      return {
+        type: 'SET_ENTRY',
+        payload: value,
+        meta: {key}
+      }
+    }
+
+    expect(addMeta({domain: 'config'})(setEntry('hello', 'world'))).to.deep.equal({
+      type: 'SET_ENTRY',
+      payload: 'world',
+      meta: {key: 'hello', domain: 'config'},
+    })
+
+    expect(addMeta({key: 'blah', domain: 'config'})(setEntry('hello', 'world'))).to.deep.equal({
+      type: 'SET_ENTRY',
+      payload: 'world',
+      meta: {key: 'blah', domain: 'config'},
+    })
+  })
 })