Merge 1538f23 into 6bb1fde

package.json

@@ -59,5 +59,7 @@
     "redux-execute": "^2.0.1",
     "redux-symbiote": "^3.0.2"
   },
-  "dependencies": {}
+  "dependencies": {
+    "ramda.assocpath": "^0.26.1"
+  }
 }

src/advanced.js

@@ -1,5 +1,9 @@
+const assocPath = require("ramda.assocpath")
 const { fetchStatus } = require("./status")
 
+const buildPathForRamda = (path = "", computedData, state) =>
+  assocPath(path.split("."), computedData, state)
+
 /**
  * @typedef {Object} Action
  * @prop {string} type
@@ -28,19 +32,25 @@ function createSymbioteFetcher({
    *   fetching: createFetching('status'),
    * })
    */
-  const createFetching = (stateProperty) => ({
-    start: (state) => ({
-      ...state,
-      [stateProperty]: { [propStatus]: fetchStatus.loading, [propError]: null },
-    }),
-    finish: (state) => ({
-      ...state,
-      [stateProperty]: { [propStatus]: fetchStatus.ready, [propError]: null },
-    }),
-    fail: (state, error) => ({
-      ...state,
-      [stateProperty]: { [propStatus]: fetchStatus.failed, [propError]: error },
-    }),
+  const createFetching = (path) => ({
+    start: (state) =>
+      buildPathForRamda(
+        path,
+        { [propStatus]: fetchStatus.loading, [propError]: null },
+        state,
+      ),
+    finish: (state) =>
+      buildPathForRamda(
+        path,
+        { [propStatus]: fetchStatus.ready, [propError]: null },
+        state,
+      ),
+    fail: (state, error) =>
+      buildPathForRamda(
+        path,
+        { [propStatus]: fetchStatus.failed, [propError]: error },
+        state,
+      ),
   })
 
   /**

test/default/create-fetching.js

@@ -88,3 +88,33 @@ test("symbiote correctly updates state", (t) => {
     fetching: { status: fetchStatus.failed, error: "SOME_ERROR" },
   })
 })
+
+test("symbiote correctly updates nested state", (t) => {
+  const initial = {
+    fetching: {
+      news: initialFetching,
+    },
+  }
+  const symbiotes = {
+    fetch: createFetching("fetching.news"),
+  }
+  const { actions, reducer } = createSymbiote(initial, symbiotes)
+
+  t.deepEqual(reducer(initial, actions.fetch.start()), {
+    fetching: {
+      news: { status: fetchStatus.loading, error: null },
+    },
+  })
+
+  t.deepEqual(reducer(initial, actions.fetch.finish()), {
+    fetching: {
+      news: { status: fetchStatus.ready, error: null },
+    },
+  })
+
+  t.deepEqual(reducer(initial, actions.fetch.fail("SOME_ERROR")), {
+    fetching: {
+      news: { status: fetchStatus.failed, error: "SOME_ERROR" },
+    },
+  })
+})