blob: dd80ce7baa3d82376b0dbec2b81aa9b1148a3e0a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/**
* ============LICENSE_START========================================================================
* ONAP : ccsdk feature sdnr wt odlux
* =================================================================================================
* Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
* =================================================================================================
* 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.
* ============LICENSE_END==========================================================================
*/
import { Event } from "../common/event"
import { Action } from './action';
import { IActionHandler } from './action';
export interface Dispatch {
<TAction extends Action>(action: TAction): TAction;
}
export interface Enhancer<TStoreState> {
(store: Store<TStoreState>): Dispatch;
}
class InitialisationAction extends Action { };
const initialisationAction = new InitialisationAction();
export class Store<TStoreState> {
constructor(actionHandler: IActionHandler<TStoreState>, enhancer?: Enhancer<TStoreState>)
constructor(actionHandler: IActionHandler<TStoreState>, initialState: TStoreState, enhancer?: Enhancer<TStoreState>)
constructor(actionHandler: IActionHandler<TStoreState>, initialState?: TStoreState | Enhancer<TStoreState>, enhancer?: Enhancer<TStoreState>) {
if (typeof initialState === 'function') {
enhancer = initialState as Enhancer<TStoreState>;
initialState = undefined;
}
this._isDispatching = false;
this.changed = new Event<void>(); // sollten wir hier eventuell sogar den state mit übergeben ?
this._actionHandler = actionHandler;
this._state = initialState as TStoreState;
if (enhancer) this._dispatch = enhancer(this);
this._dispatch(initialisationAction);
}
public changed: Event<void>;
private _dispatch: Dispatch = <TAction extends Action>(payload: TAction): TAction => {
if (payload == null || !(payload instanceof Action)) {
throw new Error(
'Actions must inherit from type Action. ' +
'Use a custom middleware for async actions.'
);
}
if (this._isDispatching) {
throw new Error('ActionHandler may not dispatch actions.');
}
const oldState = this._state;
try {
this._isDispatching = true;
this._state = this._actionHandler(oldState, payload);
} finally {
this._isDispatching = false;
}
if (this._state !== oldState) {
this.changed.invoke();
}
return payload;
}
public get dispatch(): Dispatch {
return this._dispatch;
}
public get state() {
return this._state
}
private _state: TStoreState;
private _isDispatching: boolean;
private _actionHandler: IActionHandler<TStoreState>;
}
|