import {ViewModel} from "../../ViewModel.js";
import {MemberTileViewModel} from "./MemberTileViewModel.js";
import {createMemberComparator} from "./comparator.js";

export class MemberListViewModel extends ViewModel {
    constructor(options) {
        super(options);
        this.memberTileViewModels = this._mapTileViewModels(this._filterJoinedMembers(options.members))
                                        .sortValues(createMemberComparator(options.powerLevels));
    }

    _filterJoinedMembers(members) {
        return members.filterValues(member => member.membership === "join");
    }

    _mapTileViewModels(members) {
        const mapper = (member, emitUpdate) => {
            return new MemberTileViewModel(this.childOptions({member, emitUpdate}));
        }
        const updater = (vm, params, newMember) => vm.updateFrom(newMember);
        return members.mapValues(mapper, updater);
    }
}