immutable-di-history/StateMonitor.js

History diff patch support for immutable-di

'use strict';

Object.defineProperty(exports, '__esModule', {
    value: true
});
exports['default'] = StateMonitor;
function filterArgs(args) {
    var result = args;
    try {
        JSON.stringify(args);
    } catch (e) {
        result = args.map(function (arg) {
            return typeof arg === 'function' || typeof arg === 'object' ? '[circular]' : arg;
        });
    }

    return result;
}

function StateMonitor(_ref) {
    var cursor = _ref.cursor;
    var historyPath = _ref.historyPath;

    var historyCursor = cursor.select([historyPath]);
    historyCursor.set([]);

    return function stateMonitor(_ref2, args) {
        var displayName = _ref2.displayName;
        var id = _ref2.id;

        var prevState = cursor.snap();

        return function stop() {
            var diff = cursor.diff(prevState, [historyPath]);
            historyCursor.apply(function (h) {
                return h.concat([{
                    displayName: displayName,
                    id: id,
                    args: filterArgs(args),
                    diff: diff
                }]);
            });
        };
    };
}

module.exports = exports['default'];
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