completion as action/reducer

src/reducers/background.js

@@ -0,0 +1,38 @@
+import * as tabs from '../background/tabs';
+import * as consoleActions from '../actions/console';
+import actions from '../actions';
+
+const doCompletion = (command, keywords, sendto) => {
+  if (command === 'buffer') {
+    return tabs.getCompletions(keywords).then((tabs) => {
+      let items = tabs.map((tab) => {
+        return {
+          caption: tab.title,
+          content: tab.title,
+          url: tab.url,
+          icon: tab.favIconUrl
+        }
+      });
+      let completions = {
+        name: "Buffers",
+        items: items
+      };
+      return browser.tabs.sendMessage(
+        sendto, 
+        consoleActions.setCompletions([completions]));
+    });
+  }
+  return Promise.resolve();
+};
+
+
+
+export default function reducer(state, action = {}, sendto) {
+  // TODO hide sendto object
+  switch (action.type) {
+  case actions.BACKGROUND_REQUEST_COMPLETIONS:
+    return doCompletion(action.command, action.keywords, sendto);
+  default:
+    return Promise.resolve();
+  }
+}