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 dateValid = (context, event) => {
    return true
  }
  
  const dayFocused = (context, event) => {
    return event.cursor >= 0 && event.cursor <=2
  }
  
  const monthFocused = (context, event) => {
    return event.cursor >= 3 && event.cursor <=5
  }

  const yearFocused = (context, event) => {
    return event.cursor >= 6 && event.cursor <=8
  }
  
  const editingDateStates = {
    initial: 'date',
    states: {
      'date': {
        on: {
          UPDATE_DATE: {
            target: 'date',
            actions: assign({
              dateString: (context, event) => event.value
            })
          },
          UP_ARROW: [{
            target: 'day',
            cond: dayFocused,
            actions: assign({
              dateString: (context, event) => increaseDay(context)
            })
          }, {
            target: 'month',
            cond: monthFocused,
            actions: assign({
              dateString: (context, event) => increaseMonth(context)
            })
          }, {
            target: 'year',
            cond: yearFocused,
            actions: assign({
              dateString: (context, event) => increaseYear(context)
            })
          }],
          DOWN_ARROW: [{
            target: 'day',
            cond: dayFocused,
            actions: assign({
              dateString: (context, event) => decreaseDay(context)
            })
          }, {
            target: 'month',
            cond: monthFocused,
            actions: assign({
              dateString: (context, event) => decreaseMonth(context)
            })
          }, {
            target: 'year',
            cond: yearFocused,
            actions: assign({
              dateString: (context, event) => decreaseYear(context)
            })
          }]
        }
      },
      'day': {
        on: {
          UP_ARROW: {
            target: 'day',
            actions: assign({
              dateString: (context, event) => increaseDay(context)
            })
          },
          DOWN_ARROW: {
            target: 'day',
            actions: assign({
              dateString: (context, event) => decreaseDay(context)
            })
          },
          RIGHT_ARROW: {
            target: 'month' 
          },
        }
      },
      'month': {
        on: {
          UP_ARROW: {
            target: 'month',
            actions: assign({
              dateString: (context, event) => increaseMonth(context)
            })
          },
          DOWN_ARROW: {
            target: 'month',
            actions: assign({
              dateString: (context, event) => decreaseMonth(context)
            })
          },
          LEFT_ARROW: {
            target: 'day'
          },
          RIGHT_ARROW: {
            target: 'year' 
          },
        }
      },
      'year': {
        on: {
          UP_ARROW: {
            target: 'year',
            actions: assign({
              dateString: (context, event) => increaseYear(context)
            })
          },
          DOWN_ARROW: {
            target: 'year',
            actions: assign({
              dateString: (context, event) => decreaseYear(context)
            })
          },
          LEFT_ARROW: {
            target: 'month' 
          },
        }
      },
    }
  }
  
  const fetchMachine = Machine({
    id: 'uhrzeit',
    initial: 'idle',
    context: {
      date: "",
      dateString: "",
    },
    states: {
      idle: {
        on: {
          FOCUS_DATE: 'editing_date'
        }
      },
      editing_date: {
        ...editingDateStates,
        on: {
          UNFOCUS_DATE: [{
            target: 'idle',
            cond: dateValid,
            actions: assign({
              date: (context, event) => context.dateString
            })
          }, {
            target: 'idle',
          }]
        },
      },
    }
  });