Convert boundThreepid to TS

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

src/boundThreepids.ts

@@ -0,0 +1,62 @@
+/*
+Copyright 2019 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 { IThreepid, ThreepidMedium } from "matrix-js-sdk/src/@types/threepids";
+import { MatrixClient } from "matrix-js-sdk/src/client";
+import IdentityAuthClient from './IdentityAuthClient';
+
+export async function getThreepidsWithBindStatus(
+    client: MatrixClient, filterMedium?: ThreepidMedium,
+): Promise<IThreepid[]> {
+    const userId = client.getUserId();
+
+    let { threepids } = await client.getThreePids();
+    if (filterMedium) {
+        threepids = threepids.filter((a) => a.medium === filterMedium);
+    }
+
+    // Check bind status assuming we have an IS and terms are agreed
+    if (threepids.length > 0 && !!client.getIdentityServerUrl()) {
+        try {
+            const authClient = new IdentityAuthClient();
+            const identityAccessToken = await authClient.getAccessToken({ check: false });
+
+            // Restructure for lookup query
+            const query = threepids.map(({ medium, address }): [string, string] => [medium, address]);
+            const lookupResults = await client.bulkLookupThreePids(query, identityAccessToken);
+
+            // Record which are already bound
+            for (const [medium, address, mxid] of lookupResults.threepids) {
+                if (mxid !== userId) {
+                    continue;
+                }
+                if (filterMedium && medium !== filterMedium) {
+                    continue;
+                }
+                const threepid = threepids.find(e => e.medium === medium && e.address === address);
+                if (!threepid) continue;
+                threepid.bound = true;
+            }
+        } catch (e) {
+            // Ignore terms errors here and assume other flows handle this
+            if (!(e.errcode === "M_TERMS_NOT_SIGNED")) {
+                throw e;
+            }
+        }
+    }
+
+    return threepids;
+}