Add ability to enable room encryption

Signed-off-by: Ajay Bura <ajbura@gmail.com>

src/app/molecules/room-encryption/RoomEncryption.jsx

@@ -0,0 +1,55 @@
+import React, { useState } from 'react';
+import PropTypes from 'prop-types';
+import './RoomEncryption.scss';
+
+import initMatrix from '../../../client/initMatrix';
+
+import Text from '../../atoms/text/Text';
+import Toggle from '../../atoms/button/Toggle';
+import SettingTile from '../setting-tile/SettingTile';
+
+function RoomEncryption({ roomId }) {
+  const mx = initMatrix.matrixClient;
+  const room = mx.getRoom(roomId);
+  const encryptionEvents = room.currentState.getStateEvents('m.room.encryption');
+  const [isEncrypted, setIsEncrypted] = useState(encryptionEvents.length > 0);
+  const canEnableEncryption = room.currentState.maySendStateEvent('m.room.encryption', mx.getUserId());
+
+  const handleEncryptionEnable = () => {
+    const joinRule = room.getJoinRule();
+    const confirmMsg1 = 'It is not recommended to add encryption in public room. Anyone can find and join public rooms, so anyone can read messages in them.';
+    const confirmMsg2 = 'Once enabled, encryption for a room cannot be disabled. Messages sent in an encrypted room cannot be seen by the server, only by the participants of the room. Enabling encryption may prevent many bots and bridges from working correctly';
+    if (joinRule === 'public' ? confirm(confirmMsg1) : true) {
+      if (confirm(confirmMsg2)) {
+        setIsEncrypted(true);
+        mx.sendStateEvent(roomId, 'm.room.encryption', {
+          algorithm: 'm.megolm.v1.aes-sha2',
+        });
+      }
+    }
+  };
+
+  return (
+    <div className="room-encryption">
+      <SettingTile
+        title="Enable room encryption"
+        content={(
+          <Text variant="b3">Once enabled, encryption cannot be disabled.</Text>
+        )}
+        options={(
+          <Toggle
+            isActive={isEncrypted}
+            onToggle={handleEncryptionEnable}
+            disabled={isEncrypted || !canEnableEncryption}
+          />
+        )}
+      />
+    </div>
+  );
+}
+
+RoomEncryption.propTypes = {
+  roomId: PropTypes.string.isRequired,
+};
+
+export default RoomEncryption;

src/app/molecules/room-encryption/RoomEncryption.scss

@@ -0,0 +1,5 @@
+.room-encryption {
+  & .setting-tile {
+    margin: var(--sp-normal);
+  }
+}

src/app/organisms/room/RoomSettings.jsx

@@ -18,6 +18,7 @@ import RoomNotification from '../../molecules/room-notification/RoomNotification
 import RoomVisibility from '../../molecules/room-visibility/RoomVisibility';
 import RoomAliases from '../../molecules/room-aliases/RoomAliases';
 import RoomHistoryVisibility from '../../molecules/room-history-visibility/RoomHistoryVisibility';
+import RoomEncryption from '../../molecules/room-encryption/RoomEncryption';
 
 import SettingsIC from '../../../../public/res/ic/outlined/settings.svg';
 import SearchIC from '../../../../public/res/ic/outlined/search.svg';
@@ -99,6 +100,10 @@ GeneralSettings.propTypes = {
 function SecuritySettings({ roomId }) {
   return (
     <>
+      <div className="room-settings__card">
+        <MenuHeader>Encryption</MenuHeader>
+        <RoomEncryption roomId={roomId} />
+      </div>
       <div className="room-settings__card">
         <MenuHeader>Message history visibility (Who can read history)</MenuHeader>
         <RoomHistoryVisibility roomId={roomId} />