/**
 *  MobxRnnProvider
 *
 *  Provider that works for this navigation structure.
 *
 *  (Thanks to github/@megahertz - https://gist.github.com/megahertz/3aad3adafa0f7d212b81f5e371863637)
 *
 *  @copyright Ryan McGrath 2018
 */

import {Provider} from 'mobx-react/native';

const SPECIAL_REACT_KEYS = {
    children: true,
    key: true,
    ref: true
};

export default class MobxRnnProvider extends Provider {
    props: {
        store: Object
    };

    context: {
        mobxStores: Object
    };

    getChildContext() {
        const stores = {};

        // inherit stores
        const baseStores = this.context.mobxStores;
        if(baseStores) {
            for(let key in baseStores) {
                stores[key] = baseStores[key];
            }
        }

        // add own stores
        for(let key in this.props.store) {
            if(!SPECIAL_REACT_KEYS[key]) {
                stores[key] = this.props.store[key];
            }
        }

        return {mobxStores: stores};
    }
}