implement homeserver consent stage

src/open/ServerConsentViewModel.js

@@ -0,0 +1,54 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {ViewModel} from "../utils/ViewModel.js";
+import {ClientListViewModel} from "./ClientListViewModel.js";
+import {ClientViewModel} from "./ClientViewModel.js";
+import {PreviewViewModel} from "../preview/PreviewViewModel.js";
+import {getLabelForLinkKind} from "../Link.js";
+
+export class ServerConsentViewModel extends ViewModel {
+	constructor(options) {
+		super(options);
+        this.servers = options.servers;
+        this.done = options.done;
+        this.selectedServer = this.servers[0];
+        this.showSelectServer = false;
+	}
+
+    setShowServers() {
+        this.showSelectServer = true;
+        this.emitChange();
+    }
+
+    selectServer(server) {
+        this.selectedServer = server;
+        this.emitChange();
+    }
+
+    continueWithSelection() {
+        // keep previously consented servers
+        const homeservers = this.preferences.homeservers || [];
+        homeservers.unshift(this.selectedServer);
+        this.preferences.setHomeservers(homeservers);
+        this.done();
+    }
+
+    continueWithoutConsent() {
+        this.preferences.setHomeservers([]);
+        this.done();
+    }
+}