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

machine.js

  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  const userMessageStates = {
    initial: 'idle',
    states: {
      idle: {
        on: {
          FETCH: 'getPreferences'
        }
      },
      getPreferences: {
        on: {
          RESOLVE: 'createMessage',
          REJECT: 'failure'
        }
      },
      createMessage: {
        on: {
          RESOLVE: 'sendPendingMessages',
          REJECT: 'failure'
        }
      },
      sendPendingMessages: {
        on: {
          RESOLVE: 'messageSent',
          REJECT: 'failure'
        }
      },
      messageSent: {
        type: 'final'
      },
      failure: {
        on: {
          RETRY: {
            target: 'getPreferences',
            actions: assign({
              retries: (context, event) => context.retries + 1
            })
          }
        }
      }
    }
  };
  
  const messageStates = {
    initial: 'idle',
    states: {
      idle: {
        on: {
          FETCH: 'getPendingMessages'
        }
      },
      getPendingMessages: {
        on: {
          PROCESS: 'getPopulation',
          NONE_FOUND: 'finished',
          FAILED: 'failure'
        }
      },
      getPopulation: {
        on: {
          PROCESS: 'createUserMessages',
          NONE_FOUND: 'finished',
          FAILED: 'failure'
        }
      },
      createUserMessages: {
        on: {
          CREATED: 'finished',
          FAILED: 'failure'
        }
      },
      finished: {
        type: 'final'
      },
      failure: {
        on: {
          RETRY: {
            target: 'getPendingMessages',
            actions: assign({
              retries: (context, event) => context.retries + 1
            })
          }
        }
      }
    }
  }  
    
      
  const messageRequestStates = {
    initial: 'idle',
    states: {
      idle: {
        on: {
          PERSIST: 'persisting'
        }
      },
      persisting: {
        on: {
          RESOLVE: 'finished',
          REJECT: 'failure'
        }
      },
      finished: {
        type: 'final'
      },      
      failure: {
        on: {
          RETRY: {
            target: 'persisting',
            actions: assign({
              retries: (context, event) => context.retries + 1
            })
          }
        }
      }
    }
  }  

  
  const messageMachine = Machine({
    id: 'messageEngine',
    type: 'parallel',
    initial: 'events.idle',
    context: {
      messageRequests: []
    },
    states: {
      messageRequest: {
        ...messageRequestStates
      },
      messages: {
        ...messageStates
      },     
      userMessages: {
        ...userMessageStates
      }
    },
    on: {
      PROCESS_MESSAGE_REQUEST: 'messageRequest.idle',
      PROCESS_MESSAGES: 'messages.idle',
      PROCESS_USER_MESSAGES: 'userMessages.idle'
    }
  });