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/**
* @license
* Copyright (C) 2020 The Android Open Source Project
*
* 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 {NumericChangeId, PatchSetNum} from '../../types/common';
import {BehaviorSubject, Observable} from 'rxjs';
import {distinctUntilChanged, map} from 'rxjs/operators';
export enum GerritView {
ADMIN = 'admin',
AGREEMENTS = 'agreements',
CHANGE = 'change',
DASHBOARD = 'dashboard',
DIFF = 'diff',
DOCUMENTATION_SEARCH = 'documentation-search',
EDIT = 'edit',
GROUP = 'group',
PLUGIN_SCREEN = 'plugin-screen',
REPO = 'repo',
ROOT = 'root',
SEARCH = 'search',
SETTINGS = 'settings',
}
export interface RouterState {
view?: GerritView;
changeNum?: NumericChangeId;
patchNum?: PatchSetNum;
}
// TODO: Figure out how to best enforce immutability of all states. Use Immer?
// Use DeepReadOnly?
const initialState: RouterState = {};
const privateState$ = new BehaviorSubject<RouterState>(initialState);
// Re-exporting as Observable so that you can only subscribe, but not emit.
export const routerState$: Observable<RouterState> = privateState$;
// Must only be used by the router service or whatever is in control of this
// model.
export function updateState(
view?: GerritView,
changeNum?: NumericChangeId,
patchNum?: PatchSetNum
) {
privateState$.next({
...privateState$.getValue(),
view,
changeNum,
patchNum,
});
}
export const routerView$ = routerState$.pipe(
map(state => state.view),
distinctUntilChanged()
);
export const routerChangeNum$ = routerState$.pipe(
map(state => state.changeNum),
distinctUntilChanged()
);
export const routerPatchNum$ = routerState$.pipe(
map(state => state.patchNum),
distinctUntilChanged()
);
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