bencripps / react-redux-grid

* central function to retrieve state from reducer

* used inside of mapStateToProps by grid and other plugins

* @returns {object} state

* will not return immutable object, only plain JS object

* if a dynamic reducerKey is passed, it will favor that key

* over the build in grid keys

*/

export function stateGetter(state, props, key, entry) {

    if (props

        && props.reducerKeys

        && Object.keys(props.reducerKeys).length > 0

        && props.reducerKeys[key]) {

        const dynamicKey = props.reducerKeys[key];

        const dynamicState = state

            && state[dynamicKey]

            && state[dynamicKey].get

            && state[dynamicKey].get(entry)

            ? state[dynamicKey].get(entry)

            : null;

        return dynamicState &&

            dynamicState.toJS

            ? dynamicState.toJS()

            : dynamicState;

    }

    const firstTry = state

        && state[key]

        && state[key].get

        && state[key].get(entry)

        ? state[key].get(entry)

        : null;

    if (firstTry) {

        return firstTry.toJS ? firstTry.toJS() : firstTry;

    }

    const keys = Object.keys(state);

    const normalizedKeys = keys

    const keyIndex = normalizedKeys.indexOf(key.toLowerCase());

    if (keyIndex !== -1) {

        const secondTry = state

            && state[keys[keyIndex]]

            && state[keys[keyIndex]].get

            && state[keys[keyIndex]].get(entry)

            ? state[keys[keyIndex]].get(entry)

            : null;

        if (!state[keys[keyIndex]]) {

            /* eslint-disable no-console */

            console.warn([

                'Case insensitivity for reducer keys will no longer',

                'be supported in the next major release.',

                'Please update your reducer keys',

                'to match the main exports.'

            ]);

        }

        return secondTry && secondTry.toJS

            ? secondTry.toJS()

            : secondTry;

    }

    return null;

}