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machine.js

// Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
  const taskMachine = Machine({
    id: 'taskMachine',
    initial: 'IDLE',
    context: {
      initial: 'IDLE',
      task: null,
      permissions: ["TASK_CREATE", "TASK_NEED_APPROVE", "TASK_APPROVE", "TASK_PULL", "TASK_REQUEST_REVIEW", "TASK_NEED_REVIEW_COMPLETE"]
    },
    states: {
      IDLE: {
        on: {
          CREATE_TASK: {
            target: 'DRAFT',
            cond: "TASK_CREATE"
            // actions: assign({
            //   initial: (context, event) => context.initial = 'DRAFT'
            // })
          },
        }
      },
      DRAFT: {
        on: {
          REQUEST_APPROVE: {
            target: 'NEED_APPROVE',
            cond: "TASK_NEED_APPROVE"
          },
          DELETE_TASK: {
            target: "IDLE",
            cond: "TASK_DELETE"
          }
        }
      },
      NEED_APPROVE: {
        on: {
          APPROVE: {
            target: "OFFICIAL",
            cond: "TASK_APPROVE"
          },
          DISAPPROVE: {
            target: "DRAFT",
            cond: "TASK_DISAPPROVE"
          },
          CANCEL_NEED_APPROVE: {
            target: "DRAFT",
            cond: "TASK_NEED_APPROVE_CANCEL"
          }
        }
      },
      OFFICIAL: {
        on: {
          PULL_TASK: { 
            target: "RUNNING",
            cond: "TASK_PULL"
          }, 
          CANCEL_TASK: {
            target: "NEED_APPROVE",
            cond: "TASK_CANCEL"
          }
        }
      },
      RUNNING: {
        on: {
          REQUEST_REVIEW: {
            target: "NEED_REVIEW",
            cond: "TASK_REQUEST_REVIEW"
          },
          RETURN_TASK: {
            target: "OFFICIAL",
            cond: "TASK_RETURN"
          }
          
        }
      },
      NEED_REVIEW: {
        on: {
          COMPLETE: {
            target: "COMPLETED",
            cond: "TASK_NEED_REVIEW_COMPLETE"
          },
          FAIL: {
            target: "FAILED",
            cond: "TASK_NEED_REVIEW_FAIL"
          },
          CANCEL_NEED_REVIEW: {
            target: "RUNNING",
            cond: "TASK_NEED_REVIEW_CANCEL"
          }
        }
      },
      COMPLETED: {
        type: "final"
      },
      FAILED: {
        type: "final"
      },
    }
  }, {
    guards: {
      TASK_CREATE: (context) => {
        return context.permissions.includes("TASK_CREATE")
      },
      TASK_DELETE: (context) => {
        return context.permissions.includes("TASK_DELETE")
      },
      TASK_NEED_APPROVE: (context) => {
        return context.permissions.includes("TASK_NEED_APPROVE")
      },
      TASK_APPROVE: (context) => {
        return context.permissions.includes("TASK_APPROVE")
      },
      TASK_DISAPPROVE: (context) => {
        return context.permissions.includes("TASK_DISAPPROVE")
      },
      TASK_NEED_APPROVE_CANCEL: (context) => {
        return context.permissions.includes("TASK_NEED_APPROVE_CANCEL")
      },
      TASK_PULL: (context) => {
        return context.permissions.includes("TASK_PULL")
      },
      TASK_CANCEL: (context) => {
        return context.permissions.includes("TASK_CANCEL")
      },
      TASK_REQUEST_REVIEW: (context) => {
        return context.permissions.includes("TASK_REQUEST_REVIEW")
      },
       TASK_RETURN: (context) => {
        return context.permissions.includes("TASK_RETURN")
      },
       TASK_NEED_REVIEW_COMPLETE: (context) => {
        return context.permissions.includes("TASK_NEED_REVIEW_COMPLETE")
      },
       TASK_NEED_REVIEW_FAIL: (context) => {
        return context.permissions.includes("TASK_NEED_REVIEW_FAIL")
      },
       TASK_NEED_REVIEW_CANCEL: (context) => {
        return context.permissions.includes("TASK_NEED_REVIEW_CANCEL")
      },
    }
  })