Tweak the javascript bindings so that they will work with Node.js

1 files changed, 29 insertions, 1 deletions

diff --git a/javascript/olm_pre.js b/javascript/olm_pre.js
index c7b0d5e..5a348af 100644
--- a/javascript/olm_pre.js
+++ b/javascript/olm_pre.js
@@ -1 +1,29 @@
-Olm = function() {
+var olm_exports = {};
+var get_random_values;
+if (typeof(window) !== 'undefined') {
+    // We've been imported directly into a browser.
+    window["Olm"] = olm_exports;
+    get_random_values = function(buf) {
+        window.crypto.getRandomValues(buf);
+    };
+} else if (global.window) {
+    // We're running with browserify
+    global.window["Olm"] = olm_exports;
+    get_random_values = function(buf) {
+        window.crypto.getRandomValues(buf);
+    };
+} else if (module["exports"]) {
+    // We're running in node.
+    module["exports"] = olm_exports;
+    var nodeCrypto = require("crypto");
+    get_random_values = function(buf) {
+        var bytes = nodeCrypto.randomBytes(buf.length);
+        buf.set(bytes);
+    }
+} else {
+    throw new Error("Cannot find global to attach library to");
+}
+
+var init = function() {
+    var module; // Shadow the Node 'module' object so that emscripten won't try
+                // to fiddle with it.