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

machine.js

const schemaMachineConfig = {
  initial: 'idle',
  context: {
    schemaToLoad: undefined,
    schemas: {}
  },
  states: {
    idle: {
      on: {
        LOAD: [{
          target: 'loaded',
          cond: 'hasEventSchemaNameDefined'
        }, {
          target: 'loading',
          actions: 'setSchemaToLoad',
          cond: 'hasEventSchemaName'
        }, {
          target: 'failed'
        }]
      }
    },
    loading: {
      invoke:{
        src: 'loadSchema',
        onDone: {
          target: 'loaded',
          actions: 'setSchema'
        },
        onError: 'failed'
      }
    },
    loaded: {
      on: {
        '': {
          target: 'idle',
          actions: [
            'sendToParent',
            'resetSchemaToLoad'
          ]
        }
      }
    },
    failed: {
      after: {
        500: 'idle'
      }
    }
  }
}

const SchemaMachine = Machine(schemaMachineConfig, {
  guards: {
    hasEventSchemaName: (_, event) => !!(event).schemaName,
    hasEventSchemaNameDefined: (context, event) => {
      const schemaName = (event).schemaName
      return !!schemaName && !!context.schemas[schemaName]
    }
  },
  actions: {
    resetSchemaToLoad: assign((_) => ({
      schemaToLoad: undefined
    })),
    sendToParent: (context) => sendParent('LOADED_SCHEMA', context.schemas[context.schemaToLoad]),
    setSchema: assign({
      schemas: (context, event) => ({
        ...context.schemas,
        [context.schemaToLoad]: {
          ...(event).data
        }
      })
    }),
    setSchemaToLoad: assign({
      schemaToLoad: (_, event) => (event).schemaName
    })
  },
  services: {
    loadSchema: (_context) => new Promise((resolve, reject) => {
      resolve({
        type: 'object',
        properties: {
          testId: { type: 'number' },
          name: { type: 'string' },
          test_type: {
            type: 'string',
            default: 'something'
          }
        },
        required: ['name', 'test_type']
      })
    })
  }
})