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fakeCrud.ts
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fakeCrud.ts
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import { Router, Request, Response, NextFunction } from 'express';
import { v4 } from 'uuid';
import { createCookieAPI } from 'framework/public/server';
import { useErrorsInFakeAPI, useRandomLatencyInFakeAPI } from 'application/shared/constants/cookies';
import { mutableUsersData } from './data';
/**
* This api is made to demonstrate useMutation/invalidate queries with react-query
* You can delete it at any time
*/
export const fakeCRUDRouter = Router();
async function fakeAPIRandomLatencyAndErrorResponser(req: Request, res: Response, next: NextFunction) {
const cookieAPI = createCookieAPI(req, res);
const useErrorsInFakeAPIFromCookie = cookieAPI.get(useErrorsInFakeAPI.name);
const useRandomLatencyInFakeAPIFromCookie = cookieAPI.get(useRandomLatencyInFakeAPI.name);
if (useRandomLatencyInFakeAPIFromCookie === '1') {
await new Promise<void>((resolve) => {
setTimeout(
() => {
resolve();
},
Math.round(Math.random() * 3000),
);
});
}
if (useErrorsInFakeAPIFromCookie === '1' && Math.random() <= 0.5) {
return res.status(500).json(renderError(500, 'Fake error'));
}
next();
}
fakeCRUDRouter.use(fakeAPIRandomLatencyAndErrorResponser).get('/users', (req, res) => {
const parsedLimit = parseInt(req.query['limit']?.toString() || '0', 10);
const limit = Number.isNaN(parsedLimit) ? 10 : parsedLimit;
const parsedOffset = parseInt(req.query['offset']?.toString() || '0', 10);
const offset = Number.isNaN(parsedOffset) ? 0 : parsedOffset;
// In case of /users?status=active&status=banned
const statusFilter = (
Array.isArray(req.query['status']) ? req.query['status'] : [req.query['status']]
).filter((s) => !!s);
const users = readUsers();
const filteredUsers = statusFilter.length
? users.filter((u) => statusFilter.includes(u.status))
: users;
if (!filteredUsers.length) {
return res.status(404).json(renderError(404, 'No users'));
}
return res.status(200).json({
data: {
users: filteredUsers.slice(offset, limit + offset),
total: filteredUsers.length,
},
});
});
fakeCRUDRouter.use(fakeAPIRandomLatencyAndErrorResponser).get('/users/:id', (req, res) => {
const userIdToGet = req.params.id;
const users = readUsers();
const neededUser = users.find((u) => u.id === userIdToGet);
if (!neededUser) {
return res.status(404).json(renderError(404, `No user with id: ${userIdToGet}`));
}
return res.status(200).json({
data: { user: neededUser },
});
});
fakeCRUDRouter.use(fakeAPIRandomLatencyAndErrorResponser).post('/users', (req, res) => {
const users = readUsers();
const newUserId = v4();
const newList = []
.concat(
{
...req.body,
id: newUserId,
},
...users,
)
.slice(0, 40);
writeUsers(newList);
return res.status(200).json({
data: { id: newUserId },
});
});
fakeCRUDRouter.use(fakeAPIRandomLatencyAndErrorResponser).patch('/users/:id', (req, res) => {
const userIdToUpdate = req.params.id;
const paramsToUpdate = req.body;
const users = readUsers();
const userToUpdateIndex = users.findIndex((u) => u.id === userIdToUpdate);
const mutableUserToUpdate = users[userToUpdateIndex];
if (!mutableUserToUpdate) {
return res.status(400).json(renderError(400, `No user with id: ${userIdToUpdate}`));
}
if (paramsToUpdate.name) {
mutableUserToUpdate.name = paramsToUpdate.name;
}
if (paramsToUpdate.status) {
mutableUserToUpdate.status = paramsToUpdate.status;
}
writeUsers(users);
return res.status(200).json({
data: { user: mutableUserToUpdate },
});
});
fakeCRUDRouter.use(fakeAPIRandomLatencyAndErrorResponser).delete('/users/:id', (req, res) => {
const userIdToDelete = req.params.id;
const users = readUsers();
if (!users.length || !users.find((u) => u.id === userIdToDelete)) {
return res.status(400).json(renderError(400, `No user with id: ${userIdToDelete}`));
}
const filteredUsers = users.filter((u) => u.id !== userIdToDelete);
writeUsers(filteredUsers);
return res.status(200).json({
data: { id: userIdToDelete },
});
});
function writeUsers(users: any[]) {
mutableUsersData.users = users;
}
function readUsers(): any[] {
return mutableUsersData.users;
}
function renderError(code: number, message?: string) {
return {
error: {
code,
message,
},
};
}