mattermost/webapp/store/utils.js

// Copyright (c) 2017 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.

function transformFromSet(incoming) {
    const state = {...incoming};

    for (const key in state) {
        if (state.hasOwnProperty(key)) {
            if (state[key] instanceof Set) {
                state[key] = Array.from([...state[key]]);
            }
        }
    }

    return state;
}

function transformToSet(incoming) {
    const state = {...incoming};

    for (const key in state) {
        if (state.hasOwnProperty(key)) {
            state[key] = new Set(state[key]);
        }
    }

    return state;
}

export function transformSet(incoming, setTransforms, toStorage = true) {
    const state = {...incoming};

    const transformer = toStorage ? transformFromSet : transformToSet;

    for (const key in state) {
        if (state.hasOwnProperty(key) && setTransforms.includes(key)) {
            state[key] = transformer(state[key]);
        }
    }

    return state;
}