Add api.isAnkiConnected (#1011)

ext/bg/js/anki.js

@@ -40,6 +40,15 @@ class AnkiConnect {
         this._enabled = value;
     }
 
+    async isConnected() {
+        try {
+            await this._invoke('version');
+            return true;
+        } catch (e) {
+            return false;
+        }
+    }
+
     async addNote(note) {
         if (!this._enabled) { return null; }
         await this._checkVersion();

ext/bg/js/backend.js

@@ -83,6 +83,7 @@ class Backend {
             ['kanjiFind',                    {async: true,  contentScript: true,  handler: this._onApiKanjiFind.bind(this)}],
             ['termsFind',                    {async: true,  contentScript: true,  handler: this._onApiTermsFind.bind(this)}],
             ['textParse',                    {async: true,  contentScript: true,  handler: this._onApiTextParse.bind(this)}],
+            ['isAnkiConnected',              {async: true,  contentScript: true,  handler: this._onApiIsAnkiConnected.bind(this)}],
             ['addAnkiNote',                  {async: true,  contentScript: true,  handler: this._onApiAddAnkiNote.bind(this)}],
             ['getAnkiNoteInfo',              {async: true,  contentScript: true,  handler: this._onApiGetAnkiNoteInfo.bind(this)}],
             ['injectAnkiNoteMedia',          {async: true,  contentScript: true,  handler: this._onApiInjectAnkiNoteMedia.bind(this)}],
@@ -420,6 +421,10 @@ class Backend {
         return results;
     }
 
+    async _onApiIsAnkiConnected() {
+        return await this._anki.isConnected();
+    }
+
     async _onApiAddAnkiNote({note}) {
         return await this._anki.addNote(note);
     }

ext/mixed/js/api.js

@@ -69,6 +69,10 @@ const api = (() => {
             return this._invoke('kanjiFind', {text, optionsContext});
         }
 
+        isAnkiConnected() {
+            return this._invoke('isAnkiConnected');
+        }
+
         addAnkiNote(note) {
             return this._invoke('addAnkiNote', {note});
         }