Cleaning up action names and compose drawer

app/assets/javascripts/components/reducers/compose.jsx

@@ -0,0 +1,25 @@
+import { COMPOSE_CHANGE, COMPOSE_SUBMIT_REQUEST, COMPOSE_SUBMIT_SUCCESS, COMPOSE_SUBMIT_FAIL } from '../actions/compose';
+import Immutable                                                                               from 'immutable';
+
+const initialState = Immutable.Map({
+  text: '',
+  in_reply_to_id: null,
+  isSubmitting: false
+});
+
+export default function compose(state = initialState, action) {
+  switch(action.type) {
+    case COMPOSE_CHANGE:
+      return state.set('text', action.text);
+    case COMPOSE_SUBMIT_REQUEST:
+      return state.set('isSubmitting', true);
+    case COMPOSE_SUBMIT_SUCCESS:
+      return state.withMutations(map => {
+        map.set('text', '').set('isSubmitting', false);
+      });
+    case COMPOSE_SUBMIT_FAIL:
+      return state.set('isSubmitting', false);
+    default:
+      return state;
+  }
+}