Add a command to deactivate a user

src/Mjolnir.ts

@@ -387,4 +387,21 @@ export class Mjolnir {
         await this.client.sendMessage(config.managementRoom, message);
         return true;
     }
+
+    public async isSynapseAdmin(): Promise<boolean> {
+        try {
+            const endpoint = `/_synapse/admin/v1/users/${await this.client.getUserId()}/admin`;
+            const response = await this.client.doRequest("GET", endpoint);
+            return response['admin'];
+        } catch (e) {
+            LogService.error("Mjolnir", "Error determining if Mjolnir is a server admin:");
+            LogService.error("Mjolnir", e);
+            return false; // assume not
+        }
+    }
+
+    public async deactivateSynapseUser(userId: string): Promise<any> {
+        const endpoint = `/_synapse/admin/v1/deactivate/${userId}`;
+        return await this.client.doRequest("POST", endpoint);
+    }
 }

src/commands/CommandHandler.ts

@@ -27,6 +27,7 @@ import { execUnwatchCommand, execWatchCommand } from "./WatchUnwatchCommand";
 import { execRedactCommand } from "./RedactCommand";
 import { execImportCommand } from "./ImportCommand";
 import { execSetDefaultListCommand } from "./SetDefaultBanListCommand";
+import { execDeactivateCommand } from "./DeactivateCommand";
 
 export const COMMAND_PREFIX = "!mjolnir";
 
@@ -59,6 +60,8 @@ export async function handleCommand(roomId: string, event: any, mjolnir: Mjolnir
             return await execImportCommand(roomId, event, mjolnir, parts);
         } else if (parts[1] === 'default' && parts.length > 2) {
             return await execSetDefaultListCommand(roomId, event, mjolnir, parts);
+        } else if (parts[1] === 'deactivate' && parts.length > 2) {
+            return await execDeactivateCommand(roomId, event, mjolnir, parts);
         } else {
             // Help menu
             const menu = "" +
@@ -75,6 +78,7 @@ export async function handleCommand(roomId: string, event: any, mjolnir: Mjolnir
                 "!mjolnir unwatch <room alias/ID>                                    - Unwatches a ban list\n" +
                 "!mjolnir import <room alias/ID> <list shortcode>                    - Imports bans and ACLs into the given list\n" +
                 "!mjolnir default <shortcode>                                        - Sets the default list for commands\n" +
+                "!mjolnir deactivate <user ID>                                       - Deactivates a user ID\n" +
                 "!mjolnir help                                                       - This menu\n";
             const html = `<b>Mjolnir help:</b><br><pre><code>${htmlEscape(menu)}</code></pre>`;
             const text = `Mjolnir help:\n${menu}`;

src/commands/DeactivateCommand.ts

@@ -0,0 +1,34 @@
+/*
+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 { Mjolnir } from "../Mjolnir";
+import { RichReply } from "matrix-bot-sdk";
+
+// !mjolnir deactivate <user ID>
+export async function execDeactivateCommand(roomId: string, event: any, mjolnir: Mjolnir, parts: string[]) {
+    const victim = parts[2];
+
+    const isAdmin = await mjolnir.isSynapseAdmin();
+    if (!isAdmin) {
+        const message = "I am not a Synapse administrator, or the endpoint is blocked";
+        const reply = RichReply.createFor(roomId, event, message, message);
+        reply['msgtype'] = "m.notice";
+        return mjolnir.client.sendMessage(roomId, reply);
+    }
+
+    await mjolnir.deactivateSynapseUser(victim);
+    await mjolnir.client.unstableApis.addReactionToEvent(roomId, event['event_id'], '✅');
+}