js: Initial commit for JavaScript Native Messaging API

--

Note this code misses all the legal boilerplate; please add this as
soon as possible and provide a DCO so we can merge it into master.

I also removed the dist/ directory because that was not source code.

1 files changed, 76 insertions, 0 deletions

diff --git a/lang/js/src/Connection.js b/lang/js/src/Connection.js
new file mode 100644
index 00000000..e8fea542
--- /dev/null
+++ b/lang/js/src/Connection.js
@@ -0,0 +1,76 @@
+/**
+ * A connection port will be opened for each communication between gpgmejs and
+ * gnupg. It should be alive as long as there are additional messages to be
+ * expected.
+ */
+
+export function Connection(){
+    if (!this.connection){
+        this.connection = connect();
+        this._msg = {
+            'always-trust': true,
+            // 'no-encrypt-to': false,
+            // 'no-compress': true,
+            // 'throw-keyids': false,
+            // 'wrap': false,
+            'armor': true,
+            'base64': false
+        };
+    };
+
+    this.disconnect = function () {
+        if (this.connection){
+            this.connection.disconnect();
+        }
+    };
+
+    /**
+     * Sends a message and resolves with the answer.
+     * @param {*} operation The interaction requested from gpgme
+     * @param {*} message A json-capable object to pass the operation details.
+     * TODO: _msg should contain configurable parameters
+     */
+    this.post = function(operation, message){
+        let timeout = 5000;
+        let me = this;
+        if (!message || !operation){
+            return Promise.reject('no message'); // TBD
+        }
+
+        let keys = Object.keys(message);
+        for (let i=0; i < keys.length; i++){
+            let property = keys[i];
+            me._msg[property] = message[property];
+        }
+        me._msg['op'] = operation;
+        // TODO fancier checks if what we want is consistent with submitted content
+        return new Promise(function(resolve, reject){
+            me.connection.onMessage.addListener(function(msg) {
+                if (!msg){
+                    reject('empty answer.');
+                }
+                if (msg.type === "error"){
+                    reject(msg.msg);
+                }
+                    resolve(msg);
+            });
+
+            me.connection.postMessage(me._msg);
+            setTimeout(
+                function(){
+                    me.disconnect();
+                    reject('Timeout');
+                }, timeout);
+        });
+     };
+};
+
+
+function connect(){
+    let connection = chrome.runtime.connectNative('gpgmejson');
+    if (!connection){
+        let msg = chrome.runtime.lastError || 'no message'; //TBD
+        throw(msg);
+    }
+    return connection;
+};