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

machine.js

const TRANSFER_REFUSE = {
    target: '#engagement.canceling',
    cond: (context) => !context.buyer_cancelled && !context.seller_cancelled,
    actions: [assign((context, event, metaData) => {
        const addition = context.buyer === event.cancelled_by
            ? { buyer_cancelled: true }
            : { seller_cancelled: true }

        return {
            refuse_from_state: metaData.state.value,
            cancelled_by: event.cancelled_by,
            cancelled_reason: event.cancelled_reason,
            ...addition
        }
    }),
    assign({
        history: (context, event) => ([...context.history, { event: 'TRANSFER_REFUSE', at: Date.now() }])
    })]
}

const ADMIN_TRANSFER_REFUSE = {
    target: '#engagement.cancelled',
    actions: [assign((context, event, metaData) => {
        return {
            cancelled_by: event.cancelled_by,
            cancelled_reason: event.cancelled_reason,
            is_admin_cancelled: true
        }
    })]
}

const STATE_SPEC = {
    id: 'engagement',
    initial: 'initial',
    context: {
        engagement_id: null,
        buyer: null,
        seller: null,
        buyer_rated: false,
        seller_rated: false,
        buyer_confirmed: false,
        seller_confirmed: false,
        deposit: null,
        refuse_from_state: {},
        history: []
    },
    states: {
        initial: {
            on: {
                BUYER_ENGAGE: {
                    target: 'engaged',
                    actions: assign((context, event) => {
                        return {
                            engagement_id: event.engagement_id,
                            buyer: event.buyer,
                            seller: event.seller,
                            post_id: event.postId,
                            history: [
                                ...context.history,
                                { event: 'BUYER_ENGAGED', at: Date.now() }
                            ]
                        }
                    })
                }
            }
        },
        engaged: {
            initial: 'reviewing',
            states: {
                reviewing: {
                    on: {
                        SELLER_DEPOSIT: {
                            target: 'depositing',
                            actions: assign({
                                history: (context, event) => ([...context.history, { event: 'SELLER_DEPOSIT', at: Date.now() }]),
                                deposit: (context, event) => ({
                                    ...context.deposit,
                                    deposit_time: event.deposit_time,
                                    aid: event.aid,
                                    method: event.method,
                                    amount: event.amount,
                                    paymentId: event.paymentId,
                                    depositRole: 'seller'
                                })
                            })
                        },
                        BUYER_DEPOSIT: {
                            target: 'depositing',
                            actions: assign({
                                history: (context, event) => ([...context.history, { event: 'SELLER_DEPOSIT', at: Date.now() }]),
                                deposit: (context, event) => ({
                                    ...context.deposit,
                                    deposit_time: event.deposit_time,
                                    aid: event.aid,
                                    method: event.method,
                                    amount: event.amount,
                                    paymentId: event.paymentId,
                                    depositRole: 'buyer'
                                })
                            })
                        }
                    }
                },
                depositing: {
                    on: {
                        DEPOSIT_SUCCESS: {
                            target: 'deposit_success',
                            actions: assign({
                                history: (context, event) => ([...context.history, { event: 'DEPOSIT_SUCCESS', at: Date.now() }]),
                                deposit: (context, event) => ({
                                    ...context.deposit,
                                    deposit_success: Date.now(),
                                    authToken: event.authToken,
                                    payType: event.payType
                                })
                            })
                        },
                        DEPOSIT_FAIL: {
                            target: 'deposit_failure',
                            actions: assign({
                                history: (context, event) => ([...context.history, { event: 'DEPOSIT_FAIL', at: Date.now() }]),
                                deposit: (context, event) => ({
                                    ...context.deposit,
                                    deposit_fail: Date.now()
                                })
                            })
                        }
                    }
                },
                deposit_failure: {
                    on: {
                        RETRY_DEPOSIT: {
                            target: 'reviewing',
                            actions: assign({
                                history: (context, event) => ([...context.history, { event: 'RETRY_DEPOSIT', at: Date.now() }])
                            })
                        }
                    }
                },
                deposit_success: {
                    on: {
                        OPEN_CHAT: {
                            target: '#engagement.preparing',
                            actions: assign({
                                history: (context, event) => ([...context.history, { event: 'OPEN_CHAT', at: Date.now() }])
                            })
                        }
                    }
                },
                history: {
                    type: 'history'
                }
            },
            on: { TRANSFER_REFUSE, ADMIN_TRANSFER_REFUSE }
        },
        preparing: {
            initial: 'doc_preparing',
            states: {
                doc_preparing: {
                    on: {
                        TRANSFER_CONFIRM: {
                            target: '#engagement.transferring',
                            actions: assign({
                                history: (context, event) => ([...context.history, { event: 'TRANSFER_CONFIRM', at: Date.now() }])
                            })
                        }
                    }
                },
                history: {
                    type: 'history'
                }
            },
            on: { TRANSFER_REFUSE, ADMIN_TRANSFER_REFUSE }
        },
        transferring: {
            initial: 'ship_preparing',
            states: {
                ship_preparing: {
                    on: {
                        CONFIRM_SHIP: {
                            target: 'shipping',
                            actions: assign({
                                history: (context, event) => ([...context.history, { event: 'CONFIRM_SHIP', at: Date.now() }])
                            })
                        }
                    }
                },
                shipping: {
                    on: {
                        BUYER_CONFIRM_RECEIVED: {
                            target: 'confirmation',
                            actions: assign({
                                history: (context, event) => ([...context.history, { event: 'BUYER_CONFIRM_RECEIVED', at: Date.now() }])
                            })
                        }
                    }
                },
                confirmation: {
                    on: {
                        BUYER_CONFIRM: {
                            actions: [
                                assign({ buyer_confirmed: true }),
                                assign({
                                    history: (context, event) => ([...context.history, { event: 'BUYER_CONFIRM', at: Date.now() }])
                                })
                            ]
                        },
                        SELLER_CONFIRM: {
                            actions: [
                                assign({ seller_confirmed: true }),
                                assign({
                                    history: (context, event) => ([...context.history, { event: 'SELLER_CONFIRM', at: Date.now() }])
                                })
                            ]
                        },
                        '': {
                            target: '#engagement.rating',
                            cond: (context) => context.buyer_confirmed && context.seller_confirmed
                        }
                    }
                },
                history: {
                    type: 'history'
                }
            },
            on: { TRANSFER_REFUSE, ADMIN_TRANSFER_REFUSE }
        },
        rating: {
            entry: assign({
                history: (context, event) => ([...context.history, { event: 'COMPLETED', at: Date.now() }])
            }),
            on: {
                BUYER_RATE: {
                    actions: [
                        assign({ buyer_rated: true }),
                        assign({
                            history: (context, event) => ([...context.history, { event: 'BUYER_RATE', at: Date.now() }])
                        })
                    ]
                },
                SELLER_RATE: {
                    actions: [
                        assign({ seller_rated: true }),
                        assign({
                            history: (context, event) => ([...context.history, { event: 'SELLER_RATE', at: Date.now() }])
                        })
                    ]
                },
                '': {
                    target: '#engagement.completed',
                    cond: (context) => context.buyer_rated && context.seller_rated
                }
            }
        },
        completed: {
            type: 'final',
            entry: assign({
                history: (context, event) => ([...context.history, { event: 'COMPLETED', at: Date.now() }])
            })
        },
        cancelled: {
            type: 'final',
            entry: assign({
                history: (context, event) => ([...context.history, { event: 'CANCELLED', at: Date.now() }])
            })
        },
        canceling: {
            initial: 'waiting',
            states: {
                waiting: {
                    on: {
                        SELLER_CONFIRM_CANCEL: {
                            actions: [
                                assign({ seller_cancelled: true }),
                                assign({
                                    history: (context, event) => ([...context.history, { event: 'SELLER_CONFIRM_CANCEL', at: Date.now() }])
                                })
                            ]
                        },
                        BUYER_CONFIRM_CANCEL: {
                            actions: [
                                assign({ buyer_cancelled: true }),
                                assign({
                                    history: (context, event) => ([...context.history, { event: 'BUYER_CONFIRM_CANCEL', at: Date.now() }])
                                })
                            ]
                        },
                        BUYER_DECLINE_CANCEL: {
                            actions: [
                                assign({ seller_cancelled: false, buyer_cancelled: false }),
                                assign({
                                    history: (context, event) => ([...context.history, { event: 'BUYER_DECLINE_CANCEL', at: Date.now() }])
                                })
                            ]
                        },
                        SELLER_DECLINE_CANCEL: {
                            actions: [
                                assign({ seller_cancelled: false, buyer_cancelled: false }),
                                assign({
                                    history: (context, event) => ([...context.history, { event: 'SELLER_DECLINE_CANCEL', at: Date.now() }])
                                })
                            ]
                        },
                        '': [
                            {
                                target: '#engagement.engaged.history',
                                cond: (context) => !context.seller_cancelled && !context.buyer_cancelled && context.refuse_from_state.engaged
                            },
                            {
                                target: '#engagement.preparing',
                                cond: (context) => !context.seller_cancelled && !context.buyer_cancelled && context.refuse_from_state.preparing
                            },
                            {
                                target: '#engagement.transferring.history',
                                cond: (context) => !context.seller_cancelled && !context.buyer_cancelled && context.refuse_from_state.transferring
                            },
                            {
                                target: '#engagement.cancelled',
                                cond: (context) => context.seller_cancelled && context.buyer_cancelled
                            }
                        ]
                    }
                }
            },
            on: { ADMIN_TRANSFER_REFUSE }
        }
    }
}

const machine = Machine(STATE_SPEC)