redux-saga-watch-actions/src/index.js

Easily create watchers to map actions to sagas

import { all, fork, take, takeEvery } from 'redux-saga/effects'

export const combineSagas = (...sagas) =>
  function*(...args) {
    yield all(sagas.map((saga) => fork(saga, ...args)))
  }

export const watchNextAction = (actionType, saga) =>
  function*(...args) {
    const action = yield take(actionType)
    if (typeof saga === 'function') {
      yield fork(saga, ...args.concat(action))
    }
  }

export const createWatcher = (actionType, saga) =>
  function*(...args) {
    yield takeEvery(actionType, saga, ...args)
  }

export const watchActions = (sagaMap = {}) =>
  function*(...args) {
    yield all(
      Object.keys(sagaMap).map((actionType) =>
        createWatcher(actionType, sagaMap[actionType])(...args)
      )
    )
  }