1 files changed, 67 insertions, 0 deletions
diff --git a/devtools/client/inspector/extensions/reducers/sidebar.js b/devtools/client/inspector/extensions/reducers/sidebar.js
new file mode 100644
index 0000000000..c7566f3b67
--- /dev/null
+++ b/devtools/client/inspector/extensions/reducers/sidebar.js
@@ -0,0 +1,67 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const {
+  EXTENSION_SIDEBAR_OBJECT_TREEVIEW_UPDATE,
+  EXTENSION_SIDEBAR_EXPRESSION_RESULT_VIEW_UPDATE,
+  EXTENSION_SIDEBAR_PAGE_UPDATE,
+  EXTENSION_SIDEBAR_REMOVE,
+} = require("resource://devtools/client/inspector/extensions/actions/index.js");
+
+const INITIAL_SIDEBAR = {};
+
+const reducers = {
+  [EXTENSION_SIDEBAR_OBJECT_TREEVIEW_UPDATE](sidebar, { sidebarId, object }) {
+    // Update the sidebar to a "object-treeview" which shows
+    // the passed object.
+    return Object.assign({}, sidebar, {
+      [sidebarId]: {
+        viewMode: "object-treeview",
+        object,
+      },
+    });
+  },
+
+  [EXTENSION_SIDEBAR_EXPRESSION_RESULT_VIEW_UPDATE](
+    sidebar,
+    { sidebarId, expressionResult, rootTitle }
+  ) {
+    // Update the sidebar to a "object-treeview" which shows
+    // the passed object.
+    return Object.assign({}, sidebar, {
+      [sidebarId]: {
+        viewMode: "object-value-grip-view",
+        expressionResult,
+        rootTitle,
+      },
+    });
+  },
+
+  [EXTENSION_SIDEBAR_PAGE_UPDATE](sidebar, { sidebarId, iframeURL }) {
+    // Update the sidebar to a "object-treeview" which shows
+    // the passed object.
+    return Object.assign({}, sidebar, {
+      [sidebarId]: {
+        viewMode: "extension-page",
+        iframeURL,
+      },
+    });
+  },
+
+  [EXTENSION_SIDEBAR_REMOVE](sidebar, { sidebarId }) {
+    // Remove the sidebar from the Redux store.
+    delete sidebar[sidebarId];
+    return Object.assign({}, sidebar);
+  },
+};
+
+module.exports = function (sidebar = INITIAL_SIDEBAR, action) {
+  const reducer = reducers[action.type];
+  if (!reducer) {
+    return sidebar;
+  }
+  return reducer(sidebar, action);
+};