Revert "Use protocol buffer module for libtextsecure"

This does not work with `ArrayBuffer` out of the box and will need to be
investigated and tested more before switching.

Some APIs also seemed to have changed:
- Before (OOP): `new textsecure.protobuf.WebSocketMessage(…).encode();`
- After (functional):
  ```
  textsecure.protobuf.WebSocketMessage.encode(
    new textsecure.protobuf.WebSocketMessage(…)
  );
  ```

This reverts commit d758119d9de4f99742ea941e86180b1d600c2f22.

Gruntfile.js

@@ -56,6 +56,7 @@ module.exports = function(grunt) {
           'libtextsecure/storage/user.js',
           'libtextsecure/storage/groups.js',
           'libtextsecure/storage/unprocessed.js',
+          'libtextsecure/protobufs.js',
           'libtextsecure/helpers.js',
           'libtextsecure/stringview.js',
           'libtextsecure/event_target.js',

bower.json

@@ -8,6 +8,7 @@
     "jquery": "liliakai/jquery#2.1.1-ajax-nativetransport",
     "underscore": "~1.7.0",
     "backbone": "~1.1.2",
+    "protobuf": "~3.8.0",
     "mustache": "~0.8.2",
     "qrcode": "https://github.com/davidshimjs/qrcodejs.git#1c78ccd71",
     "indexeddb-backbonejs-adapter": "*",
@@ -32,6 +33,9 @@
     "bytebuffer": [
       "dist/ByteBufferAB.js"
     ],
+    "protobuf": [
+      "dist/ProtoBuf.js"
+    ],
     "mustache": [
       "mustache.js"
     ],
@@ -85,6 +89,7 @@
       "jquery",
       "long",
       "bytebuffer",
+      "protobuf",
       "mustache",
       "underscore",
       "backbone",
@@ -97,7 +102,8 @@
     ],
     "libtextsecure": [
       "long",
-      "bytebuffer"
+      "bytebuffer",
+      "protobuf"
     ]
   }
 }

libtextsecure/protobufs.js

@@ -0,0 +1,42 @@
+(function() {
+  'use strict';
+  window.textsecure = window.textsecure || {};
+  window.textsecure.protobuf = {};
+
+  function loadProtoBufs(filename) {
+    return dcodeIO.ProtoBuf.loadProtoFile(
+      { root: window.PROTO_ROOT, file: filename },
+      function(error, result) {
+        if (error) {
+          var text =
+            'Error loading protos from ' +
+            filename +
+            ' (root: ' +
+            window.PROTO_ROOT +
+            ') ' +
+            (error && error.stack ? error.stack : error);
+          console.log(text);
+          throw error;
+        }
+        var protos = result.build('signalservice');
+        if (!protos) {
+          var text =
+            'Error loading protos from ' +
+            filename +
+            ' (root: ' +
+            window.PROTO_ROOT +
+            ')';
+          console.log(text);
+          throw new Error(text);
+        }
+        for (var protoName in protos) {
+          textsecure.protobuf[protoName] = protos[protoName];
+        }
+      }
+    );
+  }
+
+  loadProtoBufs('SignalService.proto');
+  loadProtoBufs('SubProtocol.proto');
+  loadProtoBufs('DeviceMessages.proto');
+})();

libtextsecure/test/index.html

@@ -18,6 +18,7 @@
   <script type="text/javascript" src="../components.js"></script>
   <script type="text/javascript" src="../libsignal-protocol.js"></script>
   <script type="text/javascript" src="../crypto.js"></script>
+  <script type="text/javascript" src="../protobufs.js" data-cover></script>
   <script type="text/javascript" src="../errors.js" data-cover></script>
   <script type="text/javascript" src="../storage.js" data-cover></script>
   <script type="text/javascript" src="../protocol_wrapper.js" data-cover></script>

package.json

@@ -18,12 +18,10 @@
     "generate": "yarn icon-gen && yarn grunt",
     "build": "build  --config.extraMetadata.environment=$SIGNAL_ENV",
     "build-release": "SIGNAL_ENV=production npm run build -- --config.directories.output=release",
-    "build-libtextsecure-protobuf": "pbjs --target static-module --root signalservice --out libtextsecure/protobuf-compiled.js protos/DeviceMessages.proto protos/SubProtocol.proto protos/SignalService.proto",
-    "clean-libtextsecure-protobuf": "rm -f libtextsecure/protobuf-compiled.js",
     "build-module-protobuf": "pbjs --target static-module --wrap commonjs --out ts/protobuf/compiled.js protos/*.proto && pbts --out ts/protobuf/compiled.d.ts ts/protobuf/compiled.js",
     "clean-module-protobuf": "rm -f ts/protobuf/compiled.d.ts ts/protobuf/compiled.js",
-    "build-protobuf": "yarn build-libtextsecure-protobuf && yarn build-module-protobuf",
-    "clean-protobuf": "yarn clean-libtextsecure-protobuf && yarn clean-module-protobuf",
+    "build-protobuf": "yarn build-module-protobuf",
+    "clean-protobuf": "yarn clean-module-protobuf",
     "prepare-beta-build": "node prepare_beta_build.js",
     "prepare-import-build": "node prepare_import_build.js",
     "publish-to-apt": "NAME=$npm_package_name VERSION=$npm_package_version ./aptly.sh",

preload.js

@@ -9,7 +9,6 @@ const Attachment = require('./js/modules/types/attachment');
 const Attachments = require('./app/attachments');
 const Message = require('./js/modules/types/message');
 const { deferredToPromise } = require('./js/modules/deferred_to_promise');
-const { SignalService } = require('./ts/protobuf');
 
 const { app } = electron.remote;
 
@@ -99,13 +98,11 @@ window.filesize = require('filesize');
 window.libphonenumber = require('google-libphonenumber').PhoneNumberUtil.getInstance();
 window.libphonenumber.PhoneNumberFormat = require('google-libphonenumber').PhoneNumberFormat;
 window.loadImage = require('blueimp-load-image');
+
 window.nodeBuffer = Buffer;
 window.nodeFetch = require('node-fetch');
 window.ProxyAgent = require('proxy-agent');
 
-window.textsecure = window.textsecure || {};
-window.textsecure.protobuf = SignalService;
-
 // Note: when modifying this file, consider whether our React Components or Backbone Views
 //   will need these things to render in the Style Guide. If so, go update one of these
 //   two locations: