core-native/lib/util/sagaCall.js

A lightweight framework based on React Native + Redux + Redux Saga, in strict TypeScript.

import { call as sagaCall } from "redux-saga/effects";
export const call = (fn, ...args) => {
    let result;
    // Same as fn (parameter), but store its promised return into "result"
    const wrappedFn = (...args) => {
        return fn(...args).then(_ => {
            result = _;
            return _;
        });
    };
    const effect = sagaCall.apply(null, [wrappedFn, ...args]);
    effect.result = () => {
        if (result === undefined) {
            throw new Error("Effect has not been yielded");
        }
        return result;
    };
    return effect;
};
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