dynatrace-cordova-outsystems-plugin/node_modules/ajv/lib/compile/async.js

This plugin gives you the ability to use the Dynatrace instrumentation in your hybrid application (Cordova, Ionic, ..). It uses the Mobile Agent, the JavaScript Agent and the Javascript Bridge. The Mobile Agent will give you all device specific values con

'use strict';

var MissingRefError = require('./error_classes').MissingRef;

module.exports = compileAsync;


/**
 * Creates validating function for passed schema with asynchronous loading of missing schemas.
 * `loadSchema` option should be a function that accepts schema uri and returns promise that resolves with the schema.
 * @this  Ajv
 * @param {Object}   schema schema object
 * @param {Boolean}  meta optional true to compile meta-schema; this parameter can be skipped
 * @param {Function} callback an optional node-style callback, it is called with 2 parameters: error (or null) and validating function.
 * @return {Promise} promise that resolves with a validating function.
 */
function compileAsync(schema, meta, callback) {
  /* eslint no-shadow: 0 */
  /* global Promise */
  /* jshint validthis: true */
  var self = this;
  if (typeof this._opts.loadSchema != 'function')
    throw new Error('options.loadSchema should be a function');

  if (typeof meta == 'function') {
    callback = meta;
    meta = undefined;
  }

  var p = loadMetaSchemaOf(schema).then(function () {
    var schemaObj = self._addSchema(schema, undefined, meta);
    return schemaObj.validate || _compileAsync(schemaObj);
  });

  if (callback) {
    p.then(
      function(v) { callback(null, v); },
      callback
    );
  }

  return p;


  function loadMetaSchemaOf(sch) {
    var $schema = sch.$schema;
    return $schema && !self.getSchema($schema)
            ? compileAsync.call(self, { $ref: $schema }, true)
            : Promise.resolve();
  }


  function _compileAsync(schemaObj) {
    try { return self._compile(schemaObj); }
    catch(e) {
      if (e instanceof MissingRefError) return loadMissingSchema(e);
      throw e;
    }


    function loadMissingSchema(e) {
      var ref = e.missingSchema;
      if (added(ref)) throw new Error('Schema ' + ref + ' is loaded but ' + e.missingRef + ' cannot be resolved');

      var schemaPromise = self._loadingSchemas[ref];
      if (!schemaPromise) {
        schemaPromise = self._loadingSchemas[ref] = self._opts.loadSchema(ref);
        schemaPromise.then(removePromise, removePromise);
      }

      return schemaPromise.then(function (sch) {
        if (!added(ref)) {
          return loadMetaSchemaOf(sch).then(function () {
            if (!added(ref)) self.addSchema(sch, ref, undefined, meta);
          });
        }
      }).then(function() {
        return _compileAsync(schemaObj);
      });

      function removePromise() {
        delete self._loadingSchemas[ref];
      }

      function added(ref) {
        return self._refs[ref] || self._schemas[ref];
      }
    }
  }
}