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import localforage from 'localforage';
import { SHA1 } from 'crypto-js';
import { HttpNetworkError } from '../common';
export const mockStorage = localforage.createInstance({
name: 'mock-backend',
description: 'Database for mock back end.',
driver: localforage.INDEXEDDB,
});
export async function sha1(data: Blob): Promise<string> {
const s = await new Promise<string>((resolve) => {
const fileReader = new FileReader();
fileReader.readAsBinaryString(data);
fileReader.onload = () => {
resolve(fileReader.result as string);
};
});
return SHA1(s).toString();
}
const disableNetworkKey = 'mockServer.disableNetwork';
const networkLatencyKey = 'mockServer.networkLatency';
let disableNetwork: boolean =
localStorage.getItem(disableNetworkKey) === 'true' ? true : false;
const savedNetworkLatency = localStorage.getItem(networkLatencyKey);
let networkLatency: number | null =
savedNetworkLatency != null ? Number(savedNetworkLatency) : null;
Object.defineProperty(window, 'disableNetwork', {
get: () => disableNetwork,
set: (value) => {
if (value) {
disableNetwork = true;
localStorage.setItem(disableNetworkKey, 'true');
} else {
disableNetwork = false;
localStorage.setItem(disableNetworkKey, 'false');
}
},
});
Object.defineProperty(window, 'networkLatency', {
get: () => networkLatency,
set: (value) => {
if (typeof value === 'number') {
networkLatency = value;
localStorage.setItem(networkLatencyKey, value.toString());
} else if (value == null) {
networkLatency = null;
localStorage.removeItem(networkLatencyKey);
}
},
});
export async function mockPrepare(key: string): Promise<void> {
console.log(`Recieve request: ${key}`);
if (disableNetwork) {
console.warn('Network is disabled for mock server.');
throw new HttpNetworkError();
}
if (networkLatency != null) {
await new Promise((resolve) => {
window.setTimeout(() => {
resolve();
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
}, networkLatency! * 1000);
});
}
await Promise.resolve();
}
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