Created
May 22, 2019 08:48
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Universal Saga: Magic helper for handling api-calls with its side effects
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import { call, put, takeEvery, select } from 'redux-saga/effects' | |
// все экшены названы по паттерну _REQUEST, _SUCCESS, _FAILED | |
// like AUTH_SUCCESS, AUTH_FAILED, AUTH_REQUEST | |
function * callAPI (action) { | |
const { payload, data: { method, params } } = action | |
const user = yield select(state => state.user) | |
try { | |
const authHeaders = user.headers | |
const response = yield call(method, { ...params, authHeaders }) | |
if (!response.ok) { | |
throw response | |
} | |
// если все ок переделывает экшен на _SUCCESS | |
const newType = action.type.replace('_REQUEST', '_SUCCESS') | |
// вызываем экшн _SUCCESS и передаем данные в стейт | |
yield put({ type: newType, payload, response, params }) | |
} catch (e) { | |
// если все плохо переделываем экшен на _FAILED | |
const newType = action.type.replace('_REQUEST', '_FAILED') | |
// заносим в стейт статус беды | |
yield put({ | |
type: newType, | |
problem: e.problem, | |
status: e.status, | |
payload, | |
response: e | |
}) | |
} | |
} | |
// эта штука палит все реквест-экшены и перенаправляет их в сагу callApi | |
export default function * watchRequest () { | |
yield takeEvery(action => /^.*_REQUEST/.test(action.type), callAPI) | |
} | |
// эксперментальные версия для GraphQL | |
function * graphApi (action) { | |
const { payload, data: { method, params } } = action | |
const user = yield select(state => state.user) | |
const currentWallet = yield select(state => state.currentWallet) | |
const bankId = currentWallet.id | |
try { | |
const authHeaders = user.headers | |
const response = yield call(method, { bankId, ...params, authHeaders }) | |
if ( | |
(response.data && response.data.errors) || | |
response.errors | |
) { | |
throw response | |
} | |
const newType = action.type.replace('_GRAPHQL', '_SUCCESS') | |
yield put({ type: newType, payload, response, params }) | |
} catch (e) { | |
const newType = action.type.replace('_GRAPHQL', '_FAILED') | |
yield put({ | |
type: newType, | |
problem: e.problem, | |
status: e.status, | |
payload, | |
response: e | |
}) | |
} | |
} | |
export function * watchGraphql () { | |
yield takeEvery(action => /^.*_GRAPHQL/.test(action.type), graphApi) | |
} |
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