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

machine.js

  
  const noMechanicsAssigned = (context, event) => {
    return context.mechanicsAssigned < 1
  }
  
  const caseMachine = Machine({
    id: 'case',
    initial: 'open',
    context: {
      mechanicsAssigned: 0
    },
    states: {
      open: {
        initial: 'initial',
        on: {
          STALL: 'stalled',
          RESOLVE: 'resolved',
          DELTED: 'deleted'
        },
        states: {
      initial: {
        on: {
          ASSIGN_MRO: 'maintenance_requested',
        }
      },
      maintenance_requested: {
        on: {
          MECHANIC_ASSIGNED: {
            target: 'assigned',
            actions: assign({
              mechanicsAssigned: (context, event) => context.mechanicsAssigned + 1
            })
          }
        }
      },
      unknown: {
        always: [
          {
            target: 'maintenance_requested', 
            cond: noMechanicsAssigned },
          {target: 'assigned'}
          ]
      },
      assigned: {
        on: {
          MECHANIC_ASSIGNED: {
            actions: assign({
              mechanicsAssigned: (context, event) => context.mechanicsAssigned + 1
            })
          },
          MECHANIC_DISMISSED: [
              {
                target: 'unknown',
                actions: [assign({
              mechanicsAssigned: (context, event) => context.mechanicsAssigned - 1
            })]
              }
            ]
        }
      },
      history: {
        type: 'history'
      }
    }
      },
      deleted: {
        type: 'final'
      },
      stalled: {
        on: {
          resume: 'open.history'
        }
      },
      resolved: {
        type: 'final'
      }
    }
  });