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Viewing file:     operation.js (3.16 KB)      -rw-r--r--

var Shape = require('./shape');

var util = require('../util');
var property = util.property;
var memoizedProperty = util.memoizedProperty;

function Operation(name, operation, options) {
  var self = this;
  options = options || {};

  property(this, 'name', operation.name || name);
  property(this, 'api', options.api, false);

  operation.http = operation.http || {};
  property(this, 'endpoint', operation.endpoint);
  property(this, 'httpMethod', operation.http.method || 'POST');
  property(this, 'httpPath', operation.http.requestUri || '/');
  property(this, 'authtype', operation.authtype || '');
  property(
    this,
    'endpointDiscoveryRequired',
    operation.endpointdiscovery ?
      (operation.endpointdiscovery.required ? 'REQUIRED' : 'OPTIONAL') :
    'NULL'
  );

  // httpChecksum replaces usage of httpChecksumRequired, but some APIs
  // (s3control) still uses old trait.
  var httpChecksumRequired = operation.httpChecksumRequired
    || (operation.httpChecksum && operation.httpChecksum.requestChecksumRequired);
  property(this, 'httpChecksumRequired', httpChecksumRequired, false);

  memoizedProperty(this, 'input', function() {
    if (!operation.input) {
      return new Shape.create({type: 'structure'}, options);
    }
    return Shape.create(operation.input, options);
  });

  memoizedProperty(this, 'output', function() {
    if (!operation.output) {
      return new Shape.create({type: 'structure'}, options);
    }
    return Shape.create(operation.output, options);
  });

  memoizedProperty(this, 'errors', function() {
    var list = [];
    if (!operation.errors) return null;

    for (var i = 0; i < operation.errors.length; i++) {
      list.push(Shape.create(operation.errors[i], options));
    }

    return list;
  });

  memoizedProperty(this, 'paginator', function() {
    return options.api.paginators[name];
  });

  if (options.documentation) {
    property(this, 'documentation', operation.documentation);
    property(this, 'documentationUrl', operation.documentationUrl);
  }

  // idempotentMembers only tracks top-level input shapes
  memoizedProperty(this, 'idempotentMembers', function() {
    var idempotentMembers = [];
    var input = self.input;
    var members = input.members;
    if (!input.members) {
      return idempotentMembers;
    }
    for (var name in members) {
      if (!members.hasOwnProperty(name)) {
        continue;
      }
      if (members[name].isIdempotent === true) {
        idempotentMembers.push(name);
      }
    }
    return idempotentMembers;
  });

  memoizedProperty(this, 'hasEventOutput', function() {
    var output = self.output;
    return hasEventStream(output);
  });
}

function hasEventStream(topLevelShape) {
  var members = topLevelShape.members;
  var payload = topLevelShape.payload;

  if (!topLevelShape.members) {
    return false;
  }

  if (payload) {
    var payloadMember = members[payload];
    return payloadMember.isEventStream;
  }

  // check if any member is an event stream
  for (var name in members) {
    if (!members.hasOwnProperty(name)) {
      if (members[name].isEventStream === true) {
        return true;
      }
    }
  }
  return false;
}

/**
 * @api private
 */
module.exports = Operation;