3 files changed, 48 insertions, 0 deletions
diff --git a/ext/bg/background.html b/ext/bg/background.html
index 5978f10f..90a56024 100644
--- a/ext/bg/background.html
+++ b/ext/bg/background.html
@@ -15,6 +15,7 @@
         <script src="/bg/js/anki.js"></script>
         <script src="/bg/js/api.js"></script>
         <script src="/bg/js/audio.js"></script>
+        <script src="/bg/js/backend-api-forwarder.js"></script>
         <script src="/bg/js/database.js"></script>
         <script src="/bg/js/deinflector.js"></script>
         <script src="/bg/js/dictionary.js"></script>
diff --git a/ext/bg/js/backend-api-forwarder.js b/ext/bg/js/backend-api-forwarder.js
new file mode 100644
index 00000000..979afd16
--- /dev/null
+++ b/ext/bg/js/backend-api-forwarder.js
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2019 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+class BackendApiForwarder {
+    constructor() {
+        chrome.runtime.onConnect.addListener(this.onConnect.bind(this));
+    }
+
+    onConnect(port) {
+        if (port.name !== 'backend-api-forwarder') { return; }
+
+        let tabId;
+        if (!(
+            port.sender &&
+            port.sender.tab &&
+            (typeof (tabId = port.sender.tab.id)) === 'number'
+        )) {
+            port.disconnect();
+            return;
+        }
+
+        const forwardPort = chrome.tabs.connect(tabId, {name: 'frontend-api-receiver'});
+
+        port.onMessage.addListener(message => forwardPort.postMessage(message));
+        forwardPort.onMessage.addListener(message => port.postMessage(message));
+        port.onDisconnect.addListener(() => forwardPort.disconnect());
+        forwardPort.onDisconnect.addListener(() => port.disconnect());
+    }
+}
diff --git a/ext/bg/js/backend.js b/ext/bg/js/backend.js
index d95cb82d..8f99c13a 100644
--- a/ext/bg/js/backend.js
+++ b/ext/bg/js/backend.js
@@ -22,6 +22,8 @@ class Backend {
         this.translator = new Translator();
         this.anki = new AnkiNull();
         this.options = null;
+
+        this.apiForwarder = new BackendApiForwarder();
     }
 
     async prepare() {