function reduceViewProductHistoryDetail(state, backend, actionCreator, data) {
    // Set the currently viewed event.
    // Search in active product live events first, then in product history.

    for (let i = 0; i < state.activeProductLiveEvents.count; ++i) {
        const e = state.activeProductLiveEvents.get(i)
        if (e.mid === data.id) {
            state.detailEvent.fromJS(e)
            actionCreator.redirect(Const.Page.ProductHistoryDetail)
            return
        }
    }
    for (let i = 0; i < state.productHistory.count; ++i) {
        const e = state.productHistory.get(i)
        if (e.mid === data.id) {
            state.detailEvent.fromJS(e)
            actionCreator.redirect(Const.Page.ProductHistoryDetail)
            return
        }
    }
}