1 files changed, 22 insertions, 0 deletions
diff --git a/js/seed/src/update.js b/js/seed/src/update.js
new file mode 100644
index 0000000..2f6c13b
--- /dev/null
+++ b/js/seed/src/update.js
@@ -0,0 +1,22 @@
+// update.js
+// Pure update function
+
+/**
+ * @param {object} state - Current state
+ * @param {object} action - { type, payload }
+ * @returns {object} new state
+ */
+export function update(state, action) {
+  switch (action.type) {
+    case 'UPDATE_QUERY':
+      return { ...state, query: action.payload, error: null };
+    case 'FETCH_START':
+      return { ...state, loading: true, error: null, pokemon: null };
+    case 'FETCH_SUCCESS':
+      return { ...state, loading: false, error: null, pokemon: action.payload };
+    case 'FETCH_ERROR':
+      return { ...state, loading: false, error: action.payload, pokemon: null };
+    default:
+      return state;
+  }
+} 
\ No newline at end of file