add-privileged-users-in-room (#9596)

src/components/views/settings/AddPrivilegedUsers.tsx

@@ -0,0 +1,132 @@
+/*
+Copyright 2022 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 React, { FormEvent, useCallback, useContext, useRef, useState } from 'react';
+import { Room } from 'matrix-js-sdk/src/models/room';
+import { EventType } from "matrix-js-sdk/src/@types/event";
+
+import { _t } from "../../../languageHandler";
+import { ICompletion } from '../../../autocomplete/Autocompleter';
+import UserProvider from "../../../autocomplete/UserProvider";
+import { AutocompleteInput } from "../../structures/AutocompleteInput";
+import PowerSelector from "../elements/PowerSelector";
+import MatrixClientContext from "../../../contexts/MatrixClientContext";
+import AccessibleButton from "../elements/AccessibleButton";
+import Modal from "../../../Modal";
+import ErrorDialog from "../dialogs/ErrorDialog";
+import SettingsFieldset from "./SettingsFieldset";
+
+interface AddPrivilegedUsersProps {
+    room: Room;
+    defaultUserLevel: number;
+}
+
+export const AddPrivilegedUsers: React.FC<AddPrivilegedUsersProps> = ({ room, defaultUserLevel }) => {
+    const client = useContext(MatrixClientContext);
+    const userProvider = useRef(new UserProvider(room));
+    const [isLoading, setIsLoading] = useState<boolean>(false);
+    const [powerLevel, setPowerLevel] = useState<number>(defaultUserLevel);
+    const [selectedUsers, setSelectedUsers] = useState<ICompletion[]>([]);
+    const hasLowerOrEqualLevelThanDefaultLevelFilter = useCallback(
+        (user: ICompletion) => hasLowerOrEqualLevelThanDefaultLevel(room, user, defaultUserLevel),
+        [room, defaultUserLevel],
+    );
+
+    const onSubmit = async (event: FormEvent) => {
+        event.preventDefault();
+        setIsLoading(true);
+
+        const userIds = getUserIdsFromCompletions(selectedUsers);
+        const powerLevelEvent = room.currentState.getStateEvents(EventType.RoomPowerLevels, "");
+
+        // `RoomPowerLevels` event should exist, but technically it is not guaranteed.
+        if (powerLevelEvent === null) {
+            Modal.createDialog(ErrorDialog, {
+                title: _t("Error"),
+                description: _t("Failed to change power level"),
+            });
+
+            return;
+        }
+
+        try {
+            await client.setPowerLevel(room.roomId, userIds, powerLevel, powerLevelEvent);
+            setSelectedUsers([]);
+            setPowerLevel(defaultUserLevel);
+        } catch (error) {
+            Modal.createDialog(ErrorDialog, {
+                title: _t("Error"),
+                description: _t("Failed to change power level"),
+            });
+        } finally {
+            setIsLoading(false);
+        }
+    };
+
+    return (
+        <form style={{ display: 'flex' }} onSubmit={onSubmit}>
+            <SettingsFieldset
+                legend={_t('Add privileged users')}
+                description={_t('Give one or multiple users in this room more privileges')}
+                style={{ flexGrow: 1 }}
+            >
+                <AutocompleteInput
+                    provider={userProvider.current}
+                    placeholder={_t("Search users in this room…")}
+                    onSelectionChange={setSelectedUsers}
+                    selection={selectedUsers}
+                    additionalFilter={hasLowerOrEqualLevelThanDefaultLevelFilter}
+                />
+                <PowerSelector value={powerLevel} onChange={setPowerLevel} />
+                <AccessibleButton
+                    type='submit'
+                    element='button'
+                    kind='primary'
+                    disabled={!selectedUsers.length || isLoading}
+                    onClick={null}
+                    data-testid='add-privileged-users-submit-button'
+                >
+                    { _t('Apply') }
+                </AccessibleButton>
+            </SettingsFieldset>
+        </form>
+    );
+};
+
+export const hasLowerOrEqualLevelThanDefaultLevel = (
+    room: Room,
+    user: ICompletion,
+    defaultUserLevel: number,
+) => {
+    if (user.completionId === undefined) {
+        return false;
+    }
+
+    const member = room.getMember(user.completionId);
+
+    if (member === null) {
+        return false;
+    }
+
+    return member.powerLevel <= defaultUserLevel;
+};
+
+export const getUserIdsFromCompletions = (completions: ICompletion[]) => {
+    const completionsWithId = completions.filter(completion => completion.completionId !== undefined);
+
+    // undefined completionId's are filtered out above but TypeScript does not seem to understand.
+    return completionsWithId.map(completion => completion.completionId!);
+};