Infinite call

sagas-infinite-call.js

import * as effects from "redux-saga/effects";
import * as constants from "../actions/constants";

function* processTaskTimeConsuming() {
  yield effects.delay(1000 + 1000 * Math.random());
  if (Math.random() > 0.5) {
    return true;
  } else {
    throw new Error("Something is not right!");
  }
}

export function* doProcessTask(name) {
  yield effects.put({ type: constants.TASK_PROCESS_START, name });
  try {
    yield effects.call(processTaskTimeConsuming);
    yield effects.put({ type: constants.TASK_PROCESS_DONE, name });
  } catch (error) {
    yield effects.put({ type: constants.TASK_PROCESS_ERROR, name });
  }
}

export function* rootSaga() {
  while (true) {
    const action = yield effects.take(constants.TASK_PROCESS);
    yield effects.call(doProcessTask, action.name);
  }
}