botpress/lib/dialog/validator.js

The world's first CMS for bots. Easily create, manage and extend chatbots.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.validateFlowSchema = undefined;

var _lodash = require('lodash');

var _lodash2 = _interopRequireDefault(_lodash);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

const validateFlowSchema = exports.validateFlowSchema = flow => {
  const errorPrefix = `[Flow] Invalid flow "${flow && flow.location}"`;

  if (!flow || !_lodash2.default.isObjectLike(flow)) {
    return 'Invalid JSON flow schema';
  }

  if (!flow.version || !_lodash2.default.isString(flow.version)) {
    return `${errorPrefix}, expected valid version but found none`;
  }

  if (!flow.version.startsWith('0.')) {
    return `${errorPrefix}, unsupported version of the schema "${flow.version}"`;
  }

  if (!_lodash2.default.isString(flow.startNode)) {
    return `${errorPrefix}, expected valid 'startNode'`;
  }

  if (!_lodash2.default.isArray(flow.nodes)) {
    return `${errorPrefix}, expected 'nodes' to be an array of nodes`;
  }

  if (!_lodash2.default.find(flow.nodes, { name: flow.startNode })) {
    return `${errorPrefix}, expected 'startNode' to point to a valid node name`;
  }

  if (flow.catchAll && flow.catchAll.onEnter) {
    return `${errorPrefix}, "catchAll" does not support "onEnter"`;
  }

  for (const node of flow.nodes) {
    if (!_lodash2.default.isString(node.id) || node.id.length <= 3) {
      return `${errorPrefix}, expected node ${node.id} (${node.name}) to have a valid id`;
    }
  }
};
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