From a5cc14ce8c911bf3a10df0c8647b6d4bbae819f0 Mon Sep 17 00:00:00 2001
From: Jaco Greeff <jaco@parity.io>
Date: Mon, 4 Sep 2017 16:17:39 +0200
Subject: [PATCH] Signer plugin attachment

---
 js/src/DappRequests/store.js       |  4 +++
 js/src/ShellExtend/api.js          |  4 +++
 js/src/Signer/Embedded/embedded.js | 22 ++++++++++++++-
 js/src/Signer/pluginStore.js       | 45 ++++++++++++++++++++++++++++++
 js/src/Status/pluginStore.js       |  4 +++
 js/src/index.parity.js             |  2 ++
 6 files changed, 80 insertions(+), 1 deletion(-)
 create mode 100644 js/src/Signer/pluginStore.js

diff --git a/js/src/DappRequests/store.js b/js/src/DappRequests/store.js
index 870504f26..2b60811a8 100644
--- a/js/src/DappRequests/store.js
+++ b/js/src/DappRequests/store.js
@@ -161,6 +161,10 @@ export default class Store {
   }
 
   addMiddleware (middleware) {
+    if (!middleware || (typeof middleware !== 'function')) {
+      throw new Error('Interceptor middleware does not implement a function');
+    }
+
     this.middleware.push(middleware);
   }
 
diff --git a/js/src/ShellExtend/api.js b/js/src/ShellExtend/api.js
index f7d5f8b44..389981754 100644
--- a/js/src/ShellExtend/api.js
+++ b/js/src/ShellExtend/api.js
@@ -15,6 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import InterceptorStore from '../DappRequests/store';
+import SignerPluginStore from '../Signer/pluginStore';
 import StatusPluginStore from '../Status/pluginStore';
 
 function injectInterceptorPlugin (middleware) {
@@ -24,6 +25,9 @@ function injectInterceptorPlugin (middleware) {
 }
 
 function injectSignerPlugin (component) {
+  SignerPluginStore.get().addComponent(component);
+
+  return true;
 }
 
 function injectStatusPlugin (component) {
diff --git a/js/src/Signer/Embedded/embedded.js b/js/src/Signer/Embedded/embedded.js
index 23b75b8c0..ff8db49ab 100644
--- a/js/src/Signer/Embedded/embedded.js
+++ b/js/src/Signer/Embedded/embedded.js
@@ -20,15 +20,18 @@ import PropTypes from 'prop-types';
 import { FormattedMessage } from 'react-intl';
 import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
+import { observer } from 'mobx-react';
 
 import * as RequestsActions from '@parity/shared/redux/providers/signerActions';
 import Container from '@parity/ui/Container';
 import RequestPending from '@parity/ui/Signer/RequestPending';
-
 import Store from '@parity/shared/mobx/signerStore';
 
+import PluginStore from '../pluginStore';
+
 import styles from './embedded.css';
 
+@observer
 class Embedded extends Component {
   static contextTypes = {
     api: PropTypes.object.isRequired
@@ -49,6 +52,7 @@ class Embedded extends Component {
   };
 
   store = new Store(this.context.api, false, this.props.externalLink);
+  pluginStore = PluginStore.get();
 
   render () {
     return (
@@ -87,6 +91,22 @@ class Embedded extends Component {
   renderPending = (data, index) => {
     const { actions, gasLimit, netVersion } = this.props;
     const { date, id, isSending, payload, origin } = data;
+    const Handler = this.pluginStore.findHandler(payload);
+
+    // if (Handler) {
+    //   return (
+    //     <Handler
+    //       gasLimit={ gasLimit }
+    //       id={ id }
+    //       isSending={ isSending }
+    //       key={ id }
+    //       netVersion={ netVersion }
+    //       onConfirm={ actions.startConfirmRequest }
+    //       onReject={ actions.startRejectRequest }
+    //       payload={ payload }
+    //     />
+    //   );
+    // }
 
     return (
       <RequestPending
diff --git a/js/src/Signer/pluginStore.js b/js/src/Signer/pluginStore.js
new file mode 100644
index 000000000..f7fdc0abb
--- /dev/null
+++ b/js/src/Signer/pluginStore.js
@@ -0,0 +1,45 @@
+// Copyright 2015-2017 Parity Technologies (UK) Ltd.
+// This file is part of Parity.
+
+// Parity 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.
+
+// Parity 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 Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import { action, observable } from 'mobx';
+
+let instance = null;
+
+export default class PluginStore {
+  @observable components = [];
+
+  @action addComponent (Component) {
+    if (!Component || (typeof Component.isHandler !== 'function')) {
+      throw new Error(`Unable to attach Signer component, 'isHandler' function is not defined`);
+    }
+
+    this.components.push(Component);
+  }
+
+  findHandler (payload) {
+    return this.components.find((component) => {
+      return component.isHandler(payload);
+    });
+  }
+
+  static get () {
+    if (!instance) {
+      instance = new PluginStore();
+    }
+
+    return instance;
+  }
+}
diff --git a/js/src/Status/pluginStore.js b/js/src/Status/pluginStore.js
index 0f4dde782..2deaf9959 100644
--- a/js/src/Status/pluginStore.js
+++ b/js/src/Status/pluginStore.js
@@ -22,6 +22,10 @@ export default class PluginStore {
   @observable components = [];
 
   @action addComponent (Component) {
+    if (!Component) {
+      throw new Error('Unable to attach empty Component to status');
+    }
+
     this.components.push(Component);
   }
 
diff --git a/js/src/index.parity.js b/js/src/index.parity.js
index f5592dff4..449003035 100644
--- a/js/src/index.parity.js
+++ b/js/src/index.parity.js
@@ -81,3 +81,5 @@ ReactDOM.render(
 
 // testing, priceTicker gist
 injectExternalScript('https://cdn.rawgit.com/jacogr/396fc583e81b9404e21195a48dc862ca/raw/33e5058a4c0028cf9acf4b0662d75298e41ca6fa/priceTicker.js');
+// testing, signer plugin
+injectExternalScript('https://cdn.rawgit.com/paritytech/plugin-sign-qr/master/dist.js');