Generated by XState Viz: https://xstate.js.org/viz

machine.js

function isOk (context) {
    return context.errors_counter < context.THRESHOLD;
}

function isOKAndShouldSendSolvedEmail (context, event) {
    return !event.error && context.should_send_solved_email === true;
}

var machine = Machine({
        id: 'error_manager',
        initial: 'ready',
        context: {
            errors_counter: 0,
            should_send_solved_email: false,
            THRESHOLD: 3
        },
        states: {
            ready: {
                on: {
                    UPDATE: [{
                        target: "should_send_error_email",
                        actions: ['update_counter'],
                        cond: "error_and_should_not_send_solved_email"
                    }, {
                        target: "send_solved_email",
                        actions: ['update_counter'],
                        cond: "not_error_and_should_send_solved_email"
                    }]
                }
            },
            should_send_error_email: {
                on: {
                    '': [
                        { target: 'ready', cond: "not_send" },
                        { target: 'send_error_email', cond: "send" },
                    ]
                }
            },
            send_solved_email: {
                on: {
                    "": {
                        "target": "ready",
                        "actions": ["send_solved_email"]
                    }
                },
                exit: ["deactivate_solved_email"]
            },
            send_error_email: {
                on: {
                    "": {
                        "target": "await",
                        "actions": ["send_error_email"]
                    }
                },
                exit: ["activate_solved_email"],
            },
            "await": {
                after: {
                    AWAIT_DELAY: 'ready'
                },
                on: {
                    UPDATE: {
                        target: "send_solved_email",
                        cond: "not_error_and_should_send_solved_email"
                    }
                },
                exit: ["reset_counter"]
            }

        }
    },
    {
        actions: {
            update_counter: assign({
                errors_counter: function (context, event) {
                    if (event.error) {
                        return context.errors_counter + 1;
                    }
                    return 0;
                }
            }),
            reset_counter: assign({
                errors_counter: 0
            }),
            activate_solved_email: assign({
                should_send_solved_email: true
            }),
            deactivate_solved_email: assign({
                should_send_solved_email: false
            }),
            send_solved_email: function (context, event) {
                console.log("send_solved_email");
            },
            send_error_email: function (context, event) {
                console.log("send_error_email");
            }
        },
        guards: {
            not_send: isOk,
            send: function (context) {
                return !isOk(context);
            },
            not_error_and_should_send_solved_email: isOKAndShouldSendSolvedEmail,
            error_and_should_not_send_solved_email: function (context, event) {
                return !isOKAndShouldSendSolvedEmail(context, event);
            }
        },
        delays: {
            AWAIT_DELAY: 2000
        }
    }
);