node_modules

node_modules/@octokit/rest/plugins/authentication-deprecated/authenticate.js

@@ -0,0 +1,52 @@
+module.exports = authenticate;
+
+const { Deprecation } = require("deprecation");
+const once = require("once");
+
+const deprecateAuthenticate = once((log, deprecation) => log.warn(deprecation));
+
+function authenticate(state, options) {
+  deprecateAuthenticate(
+    state.octokit.log,
+    new Deprecation(
+      '[@octokit/rest] octokit.authenticate() is deprecated. Use "auth" constructor option instead.'
+    )
+  );
+
+  if (!options) {
+    state.auth = false;
+    return;
+  }
+
+  switch (options.type) {
+    case "basic":
+      if (!options.username || !options.password) {
+        throw new Error(
+          "Basic authentication requires both a username and password to be set"
+        );
+      }
+      break;
+
+    case "oauth":
+      if (!options.token && !(options.key && options.secret)) {
+        throw new Error(
+          "OAuth2 authentication requires a token or key & secret to be set"
+        );
+      }
+      break;
+
+    case "token":
+    case "app":
+      if (!options.token) {
+        throw new Error("Token authentication requires a token to be set");
+      }
+      break;
+
+    default:
+      throw new Error(
+        "Invalid authentication type, must be 'basic', 'oauth', 'token' or 'app'"
+      );
+  }
+
+  state.auth = options;
+}

node_modules/@octokit/rest/plugins/authentication-deprecated/before-request.js

@@ -0,0 +1,43 @@
+module.exports = authenticationBeforeRequest;
+
+const btoa = require("btoa-lite");
+const uniq = require("lodash.uniq");
+
+function authenticationBeforeRequest(state, options) {
+  if (!state.auth.type) {
+    return;
+  }
+
+  if (state.auth.type === "basic") {
+    const hash = btoa(`${state.auth.username}:${state.auth.password}`);
+    options.headers.authorization = `Basic ${hash}`;
+    return;
+  }
+
+  if (state.auth.type === "token") {
+    options.headers.authorization = `token ${state.auth.token}`;
+    return;
+  }
+
+  if (state.auth.type === "app") {
+    options.headers.authorization = `Bearer ${state.auth.token}`;
+    const acceptHeaders = options.headers.accept
+      .split(",")
+      .concat("application/vnd.github.machine-man-preview+json");
+    options.headers.accept = uniq(acceptHeaders)
+      .filter(Boolean)
+      .join(",");
+    return;
+  }
+
+  options.url += options.url.indexOf("?") === -1 ? "?" : "&";
+
+  if (state.auth.token) {
+    options.url += `access_token=${encodeURIComponent(state.auth.token)}`;
+    return;
+  }
+
+  const key = encodeURIComponent(state.auth.key);
+  const secret = encodeURIComponent(state.auth.secret);
+  options.url += `client_id=${key}&client_secret=${secret}`;
+}

node_modules/@octokit/rest/plugins/authentication-deprecated/index.js

@@ -0,0 +1,31 @@
+module.exports = authenticationPlugin;
+
+const { Deprecation } = require("deprecation");
+const once = require("once");
+
+const deprecateAuthenticate = once((log, deprecation) => log.warn(deprecation));
+
+const authenticate = require("./authenticate");
+const beforeRequest = require("./before-request");
+const requestError = require("./request-error");
+
+function authenticationPlugin(octokit, options) {
+  if (options.auth) {
+    octokit.authenticate = () => {
+      deprecateAuthenticate(
+        octokit.log,
+        new Deprecation(
+          '[@octokit/rest] octokit.authenticate() is deprecated and has no effect when "auth" option is set on Octokit constructor'
+        )
+      );
+    };
+    return;
+  }
+  const state = {
+    octokit,
+    auth: false
+  };
+  octokit.authenticate = authenticate.bind(null, state);
+  octokit.hook.before("request", beforeRequest.bind(null, state));
+  octokit.hook.error("request", requestError.bind(null, state));
+}

node_modules/@octokit/rest/plugins/authentication-deprecated/request-error.js

@@ -0,0 +1,55 @@
+module.exports = authenticationRequestError;
+
+const { RequestError } = require("@octokit/request-error");
+
+function authenticationRequestError(state, error, options) {
+  /* istanbul ignore next */
+  if (!error.headers) throw error;
+
+  const otpRequired = /required/.test(error.headers["x-github-otp"] || "");
+  // handle "2FA required" error only
+  if (error.status !== 401 || !otpRequired) {
+    throw error;
+  }
+
+  if (
+    error.status === 401 &&
+    otpRequired &&
+    error.request &&
+    error.request.headers["x-github-otp"]
+  ) {
+    throw new RequestError(
+      "Invalid one-time password for two-factor authentication",
+      401,
+      {
+        headers: error.headers,
+        request: options
+      }
+    );
+  }
+
+  if (typeof state.auth.on2fa !== "function") {
+    throw new RequestError(
+      "2FA required, but options.on2fa is not a function. See https://github.com/octokit/rest.js#authentication",
+      401,
+      {
+        headers: error.headers,
+        request: options
+      }
+    );
+  }
+
+  return Promise.resolve()
+    .then(() => {
+      return state.auth.on2fa();
+    })
+    .then(oneTimePassword => {
+      const newOptions = Object.assign(options, {
+        headers: Object.assign(
+          { "x-github-otp": oneTimePassword },
+          options.headers
+        )
+      });
+      return state.octokit.request(newOptions);
+    });
+}

node_modules/@octokit/rest/plugins/authentication/before-request.js

@@ -0,0 +1,65 @@
+module.exports = authenticationBeforeRequest;
+
+const btoa = require("btoa-lite");
+
+const withAuthorizationPrefix = require("./with-authorization-prefix");
+
+function authenticationBeforeRequest(state, options) {
+  if (typeof state.auth === "string") {
+    options.headers.authorization = withAuthorizationPrefix(state.auth);
+
+    // https://developer.github.com/v3/previews/#integrations
+    if (
+      /^bearer /i.test(state.auth) &&
+      !/machine-man/.test(options.headers.accept)
+    ) {
+      const acceptHeaders = options.headers.accept
+        .split(",")
+        .concat("application/vnd.github.machine-man-preview+json");
+      options.headers.accept = acceptHeaders.filter(Boolean).join(",");
+    }
+
+    return;
+  }
+
+  if (state.auth.username) {
+    const hash = btoa(`${state.auth.username}:${state.auth.password}`);
+    options.headers.authorization = `Basic ${hash}`;
+    if (state.otp) {
+      options.headers["x-github-otp"] = state.otp;
+    }
+    return;
+  }
+
+  if (state.auth.clientId) {
+    // There is a special case for OAuth applications, when `clientId` and `clientSecret` is passed as
+    // Basic Authorization instead of query parameters. The only routes where that applies share the same
+    // URL though: `/applications/:client_id/tokens/:access_token`.
+    //
+    //  1. [Check an authorization](https://developer.github.com/v3/oauth_authorizations/#check-an-authorization)
+    //  2. [Reset an authorization](https://developer.github.com/v3/oauth_authorizations/#reset-an-authorization)
+    //  3. [Revoke an authorization for an application](https://developer.github.com/v3/oauth_authorizations/#revoke-an-authorization-for-an-application)
+    //
+    // We identify by checking the URL. It must merge both "/applications/:client_id/tokens/:access_token"
+    // as well as "/applications/123/tokens/token456"
+    if (/\/applications\/:?[\w_]+\/tokens\/:?[\w_]+($|\?)/.test(options.url)) {
+      const hash = btoa(`${state.auth.clientId}:${state.auth.clientSecret}`);
+      options.headers.authorization = `Basic ${hash}`;
+      return;
+    }
+
+    options.url += options.url.indexOf("?") === -1 ? "?" : "&";
+    options.url += `client_id=${state.auth.clientId}&client_secret=${state.auth.clientSecret}`;
+    return;
+  }
+
+  return Promise.resolve()
+
+    .then(() => {
+      return state.auth();
+    })
+
+    .then(authorization => {
+      options.headers.authorization = withAuthorizationPrefix(authorization);
+    });
+}

node_modules/@octokit/rest/plugins/authentication/index.js

@@ -0,0 +1,21 @@
+module.exports = authenticationPlugin;
+
+const beforeRequest = require("./before-request");
+const requestError = require("./request-error");
+const validate = require("./validate");
+
+function authenticationPlugin(octokit, options) {
+  if (!options.auth) {
+    return;
+  }
+
+  validate(options.auth);
+
+  const state = {
+    octokit,
+    auth: options.auth
+  };
+
+  octokit.hook.before("request", beforeRequest.bind(null, state));
+  octokit.hook.error("request", requestError.bind(null, state));
+}

node_modules/@octokit/rest/plugins/authentication/request-error.js

@@ -0,0 +1,61 @@
+module.exports = authenticationRequestError;
+
+const { RequestError } = require("@octokit/request-error");
+
+function authenticationRequestError(state, error, options) {
+  if (!error.headers) throw error;
+
+  const otpRequired = /required/.test(error.headers["x-github-otp"] || "");
+  // handle "2FA required" error only
+  if (error.status !== 401 || !otpRequired) {
+    throw error;
+  }
+
+  if (
+    error.status === 401 &&
+    otpRequired &&
+    error.request &&
+    error.request.headers["x-github-otp"]
+  ) {
+    if (state.otp) {
+      delete state.otp; // no longer valid, request again
+    } else {
+      throw new RequestError(
+        "Invalid one-time password for two-factor authentication",
+        401,
+        {
+          headers: error.headers,
+          request: options
+        }
+      );
+    }
+  }
+
+  if (typeof state.auth.on2fa !== "function") {
+    throw new RequestError(
+      "2FA required, but options.on2fa is not a function. See https://github.com/octokit/rest.js#authentication",
+      401,
+      {
+        headers: error.headers,
+        request: options
+      }
+    );
+  }
+
+  return Promise.resolve()
+    .then(() => {
+      return state.auth.on2fa();
+    })
+    .then(oneTimePassword => {
+      const newOptions = Object.assign(options, {
+        headers: Object.assign(options.headers, {
+          "x-github-otp": oneTimePassword
+        })
+      });
+      return state.octokit.request(newOptions).then(response => {
+        // If OTP still valid, then persist it for following requests
+        state.otp = oneTimePassword;
+        return response;
+      });
+    });
+}

node_modules/@octokit/rest/plugins/authentication/validate.js

@@ -0,0 +1,21 @@
+module.exports = validateAuth;
+
+function validateAuth(auth) {
+  if (typeof auth === "string") {
+    return;
+  }
+
+  if (typeof auth === "function") {
+    return;
+  }
+
+  if (auth.username && auth.password) {
+    return;
+  }
+
+  if (auth.clientId && auth.clientSecret) {
+    return;
+  }
+
+  throw new Error(`Invalid "auth" option: ${JSON.stringify(auth)}`);
+}

node_modules/@octokit/rest/plugins/authentication/with-authorization-prefix.js

@@ -0,0 +1,23 @@
+module.exports = withAuthorizationPrefix;
+
+const atob = require("atob-lite");
+
+const REGEX_IS_BASIC_AUTH = /^[\w-]+:/;
+
+function withAuthorizationPrefix(authorization) {
+  if (/^(basic|bearer|token) /i.test(authorization)) {
+    return authorization;
+  }
+
+  try {
+    if (REGEX_IS_BASIC_AUTH.test(atob(authorization))) {
+      return `basic ${authorization}`;
+    }
+  } catch (error) {}
+
+  if (authorization.split(/\./).length === 3) {
+    return `bearer ${authorization}`;
+  }
+
+  return `token ${authorization}`;
+}

node_modules/@octokit/rest/plugins/log/index.js

@@ -0,0 +1,28 @@
+module.exports = octokitDebug;
+
+function octokitDebug(octokit) {
+  octokit.hook.wrap("request", (request, options) => {
+    octokit.log.debug("request", options);
+    const start = Date.now();
+    const requestOptions = octokit.request.endpoint.parse(options);
+    const path = requestOptions.url.replace(options.baseUrl, "");
+
+    return request(options)
+      .then(response => {
+        octokit.log.info(
+          `${requestOptions.method} ${path} - ${
+            response.status
+          } in ${Date.now() - start}ms`
+        );
+        return response;
+      })
+
+      .catch(error => {
+        octokit.log.info(
+          `${requestOptions.method} ${path} - ${error.status} in ${Date.now() -
+            start}ms`
+        );
+        throw error;
+      });
+  });
+}

node_modules/@octokit/rest/plugins/pagination/index.js

@@ -0,0 +1,9 @@
+module.exports = paginatePlugin;
+
+const iterator = require("./iterator");
+const paginate = require("./paginate");
+
+function paginatePlugin(octokit) {
+  octokit.paginate = paginate.bind(null, octokit);
+  octokit.paginate.iterator = iterator.bind(null, octokit);
+}

node_modules/@octokit/rest/plugins/pagination/iterator.js

@@ -0,0 +1,34 @@
+module.exports = iterator;
+
+const normalizePaginatedListResponse = require("./normalize-paginated-list-response");
+
+function iterator(octokit, options) {
+  const headers = options.headers;
+  let url = octokit.request.endpoint(options).url;
+
+  return {
+    [Symbol.asyncIterator]: () => ({
+      next() {
+        if (!url) {
+          return Promise.resolve({ done: true });
+        }
+
+        return octokit
+          .request({ url, headers })
+
+          .then(response => {
+            normalizePaginatedListResponse(octokit, url, response);
+
+            // `response.headers.link` format:
+            // '<https://api.github.com/users/aseemk/followers?page=2>; rel="next", <https://api.github.com/users/aseemk/followers?page=2>; rel="last"'
+            // sets `url` to undefined if "next" URL is not present or `link` header is not set
+            url = ((response.headers.link || "").match(
+              /<([^>]+)>;\s*rel="next"/
+            ) || [])[1];
+
+            return { value: response };
+          });
+      }
+    })
+  };
+}

node_modules/@octokit/rest/plugins/pagination/normalize-paginated-list-response.js

@@ -0,0 +1,116 @@
+/**
+ * Some “list” response that can be paginated have a different response structure
+ *
+ * They have a `total_count` key in the response (search also has `incomplete_results`,
+ * /installation/repositories also has `repository_selection`), as well as a key with
+ * the list of the items which name varies from endpoint to endpoint:
+ *
+ * - https://developer.github.com/v3/search/#example (key `items`)
+ * - https://developer.github.com/v3/checks/runs/#response-3 (key: `check_runs`)
+ * - https://developer.github.com/v3/checks/suites/#response-1 (key: `check_suites`)
+ * - https://developer.github.com/v3/apps/installations/#list-repositories (key: `repositories`)
+ * - https://developer.github.com/v3/apps/installations/#list-installations-for-a-user (key `installations`)
+ * - https://developer.github.com/v3/orgs/#list-installations-for-an-organization (key `installations`)
+ *
+ * Octokit normalizes these responses so that paginated results are always returned following
+ * the same structure. One challenge is that if the list response has only one page, no Link
+ * header is provided, so this header alone is not sufficient to check wether a response is
+ * paginated or not. For the exceptions with the namespace, a fallback check for the route
+ * paths has to be added in order to normalize the response. We cannot check for the total_count
+ * property because it also exists in the response of Get the combined status for a specific ref.
+ */
+
+module.exports = normalizePaginatedListResponse;
+
+const { Deprecation } = require("deprecation");
+const once = require("once");
+
+const deprecateIncompleteResults = once((log, deprecation) =>
+  log.warn(deprecation)
+);
+const deprecateTotalCount = once((log, deprecation) => log.warn(deprecation));
+const deprecateNamespace = once((log, deprecation) => log.warn(deprecation));
+
+const REGEX_IS_SEARCH_PATH = /^\/search\//;
+const REGEX_IS_CHECKS_PATH = /^\/repos\/[^/]+\/[^/]+\/commits\/[^/]+\/(check-runs|check-suites)/;
+const REGEX_IS_INSTALLATION_REPOSITORIES_PATH = /^\/installation\/repositories/;
+const REGEX_IS_USER_INSTALLATIONS_PATH = /^\/user\/installations/;
+const REGEX_IS_ORG_INSTALLATIONS_PATH = /^\/orgs\/[^/]+\/installations/;
+
+function normalizePaginatedListResponse(octokit, url, response) {
+  const path = url.replace(octokit.request.endpoint.DEFAULTS.baseUrl, "");
+  if (
+    !REGEX_IS_SEARCH_PATH.test(path) &&
+    !REGEX_IS_CHECKS_PATH.test(path) &&
+    !REGEX_IS_INSTALLATION_REPOSITORIES_PATH.test(path) &&
+    !REGEX_IS_USER_INSTALLATIONS_PATH.test(path) &&
+    !REGEX_IS_ORG_INSTALLATIONS_PATH.test(path)
+  ) {
+    return;
+  }
+
+  // keep the additional properties intact to avoid a breaking change,
+  // but log a deprecation warning when accessed
+  const incompleteResults = response.data.incomplete_results;
+  const repositorySelection = response.data.repository_selection;
+  const totalCount = response.data.total_count;
+  delete response.data.incomplete_results;
+  delete response.data.repository_selection;
+  delete response.data.total_count;
+
+  const namespaceKey = Object.keys(response.data)[0];
+
+  response.data = response.data[namespaceKey];
+
+  Object.defineProperty(response.data, namespaceKey, {
+    get() {
+      deprecateNamespace(
+        octokit.log,
+        new Deprecation(
+          `[@octokit/rest] "result.data.${namespaceKey}" is deprecated. Use "result.data" instead`
+        )
+      );
+      return response.data;
+    }
+  });
+
+  if (typeof incompleteResults !== "undefined") {
+    Object.defineProperty(response.data, "incomplete_results", {
+      get() {
+        deprecateIncompleteResults(
+          octokit.log,
+          new Deprecation(
+            '[@octokit/rest] "result.data.incomplete_results" is deprecated.'
+          )
+        );
+        return incompleteResults;
+      }
+    });
+  }
+
+  if (typeof repositorySelection !== "undefined") {
+    Object.defineProperty(response.data, "repository_selection", {
+      get() {
+        deprecateTotalCount(
+          octokit.log,
+          new Deprecation(
+            '[@octokit/rest] "result.data.repository_selection" is deprecated.'
+          )
+        );
+        return repositorySelection;
+      }
+    });
+  }
+
+  Object.defineProperty(response.data, "total_count", {
+    get() {
+      deprecateTotalCount(
+        octokit.log,
+        new Deprecation(
+          '[@octokit/rest] "result.data.total_count" is deprecated.'
+        )
+      );
+      return totalCount;
+    }
+  });
+}

node_modules/@octokit/rest/plugins/pagination/paginate.js

@@ -0,0 +1,40 @@
+module.exports = paginate;
+
+const iterator = require("./iterator");
+
+function paginate(octokit, route, options, mapFn) {
+  if (typeof options === "function") {
+    mapFn = options;
+    options = undefined;
+  }
+  options = octokit.request.endpoint.merge(route, options);
+  return gather(
+    octokit,
+    [],
+    iterator(octokit, options)[Symbol.asyncIterator](),
+    mapFn
+  );
+}
+
+function gather(octokit, results, iterator, mapFn) {
+  return iterator.next().then(result => {
+    if (result.done) {
+      return results;
+    }
+
+    let earlyExit = false;
+    function done() {
+      earlyExit = true;
+    }
+
+    results = results.concat(
+      mapFn ? mapFn(result.value, done) : result.value.data
+    );
+
+    if (earlyExit) {
+      return results;
+    }
+
+    return gather(octokit, results, iterator, mapFn);
+  });
+}

node_modules/@octokit/rest/plugins/register-endpoints/index.js

@@ -0,0 +1,7 @@
+module.exports = octokitRegisterEndpoints;
+
+const registerEndpoints = require("./register-endpoints");
+
+function octokitRegisterEndpoints(octokit) {
+  octokit.registerEndpoints = registerEndpoints.bind(null, octokit);
+}

node_modules/@octokit/rest/plugins/register-endpoints/register-endpoints.js

@@ -0,0 +1,98 @@
+module.exports = registerEndpoints;
+
+const { Deprecation } = require("deprecation");
+
+function registerEndpoints(octokit, routes) {
+  Object.keys(routes).forEach(namespaceName => {
+    if (!octokit[namespaceName]) {
+      octokit[namespaceName] = {};
+    }
+
+    Object.keys(routes[namespaceName]).forEach(apiName => {
+      const apiOptions = routes[namespaceName][apiName];
+
+      const endpointDefaults = ["method", "url", "headers"].reduce(
+        (map, key) => {
+          if (typeof apiOptions[key] !== "undefined") {
+            map[key] = apiOptions[key];
+          }
+
+          return map;
+        },
+        {}
+      );
+
+      endpointDefaults.request = {
+        validate: apiOptions.params
+      };
+
+      let request = octokit.request.defaults(endpointDefaults);
+
+      // patch request & endpoint methods to support deprecated parameters.
+      // Not the most elegant solution, but we don’t want to move deprecation
+      // logic into octokit/endpoint.js as it’s out of scope
+      const hasDeprecatedParam = Object.keys(apiOptions.params || {}).find(
+        key => apiOptions.params[key].deprecated
+      );
+      if (hasDeprecatedParam) {
+        const patch = patchForDeprecation.bind(null, octokit, apiOptions);
+        request = patch(
+          octokit.request.defaults(endpointDefaults),
+          `.${namespaceName}.${apiName}()`
+        );
+        request.endpoint = patch(
+          request.endpoint,
+          `.${namespaceName}.${apiName}.endpoint()`
+        );
+        request.endpoint.merge = patch(
+          request.endpoint.merge,
+          `.${namespaceName}.${apiName}.endpoint.merge()`
+        );
+      }
+
+      if (apiOptions.deprecated) {
+        octokit[namespaceName][apiName] = function deprecatedEndpointMethod() {
+          octokit.log.warn(
+            new Deprecation(`[@octokit/rest] ${apiOptions.deprecated}`)
+          );
+          octokit[namespaceName][apiName] = request;
+          return request.apply(null, arguments);
+        };
+
+        return;
+      }
+
+      octokit[namespaceName][apiName] = request;
+    });
+  });
+}
+
+function patchForDeprecation(octokit, apiOptions, method, methodName) {
+  const patchedMethod = options => {
+    options = Object.assign({}, options);
+
+    Object.keys(options).forEach(key => {
+      if (apiOptions.params[key] && apiOptions.params[key].deprecated) {
+        const aliasKey = apiOptions.params[key].alias;
+
+        octokit.log.warn(
+          new Deprecation(
+            `[@octokit/rest] "${key}" parameter is deprecated for "${methodName}". Use "${aliasKey}" instead`
+          )
+        );
+
+        if (!(aliasKey in options)) {
+          options[aliasKey] = options[key];
+        }
+        delete options[key];
+      }
+    });
+
+    return method(options);
+  };
+  Object.keys(method).forEach(key => {
+    patchedMethod[key] = method[key];
+  });
+
+  return patchedMethod;
+}

node_modules/@octokit/rest/plugins/rest-api-endpoints/index.js

@@ -0,0 +1,13 @@
+module.exports = octokitRestApiEndpoints;
+
+const ROUTES = require("./routes.json");
+
+function octokitRestApiEndpoints(octokit) {
+  // Aliasing scopes for backward compatibility
+  // See https://github.com/octokit/rest.js/pull/1134
+  ROUTES.gitdata = ROUTES.git;
+  ROUTES.authorization = ROUTES.oauthAuthorizations;
+  ROUTES.pullRequests = ROUTES.pulls;
+
+  octokit.registerEndpoints(ROUTES);
+}

node_modules/@octokit/rest/plugins/validate/index.js

@@ -0,0 +1,7 @@
+module.exports = octokitValidate;
+
+const validate = require("./validate");
+
+function octokitValidate(octokit) {
+  octokit.hook.before("request", validate.bind(null, octokit));
+}

node_modules/@octokit/rest/plugins/validate/validate.js

@@ -0,0 +1,151 @@
+"use strict";
+
+module.exports = validate;
+
+const { RequestError } = require("@octokit/request-error");
+const get = require("lodash.get");
+const set = require("lodash.set");
+
+function validate(octokit, options) {
+  if (!options.request.validate) {
+    return;
+  }
+  const { validate: params } = options.request;
+
+  Object.keys(params).forEach(parameterName => {
+    const parameter = get(params, parameterName);
+
+    const expectedType = parameter.type;
+    let parentParameterName;
+    let parentValue;
+    let parentParamIsPresent = true;
+    let parentParameterIsArray = false;
+
+    if (/\./.test(parameterName)) {
+      parentParameterName = parameterName.replace(/\.[^.]+$/, "");
+      parentParameterIsArray = parentParameterName.slice(-2) === "[]";
+      if (parentParameterIsArray) {
+        parentParameterName = parentParameterName.slice(0, -2);
+      }
+      parentValue = get(options, parentParameterName);
+      parentParamIsPresent =
+        parentParameterName === "headers" ||
+        (typeof parentValue === "object" && parentValue !== null);
+    }
+
+    const values = parentParameterIsArray
+      ? (get(options, parentParameterName) || []).map(
+          value => value[parameterName.split(/\./).pop()]
+        )
+      : [get(options, parameterName)];
+
+    values.forEach((value, i) => {
+      const valueIsPresent = typeof value !== "undefined";
+      const valueIsNull = value === null;
+      const currentParameterName = parentParameterIsArray
+        ? parameterName.replace(/\[\]/, `[${i}]`)
+        : parameterName;
+
+      if (!parameter.required && !valueIsPresent) {
+        return;
+      }
+
+      // if the parent parameter is of type object but allows null
+      // then the child parameters can be ignored
+      if (!parentParamIsPresent) {
+        return;
+      }
+
+      if (parameter.allowNull && valueIsNull) {
+        return;
+      }
+
+      if (!parameter.allowNull && valueIsNull) {
+        throw new RequestError(
+          `'${currentParameterName}' cannot be null`,
+          400,
+          {
+            request: options
+          }
+        );
+      }
+
+      if (parameter.required && !valueIsPresent) {
+        throw new RequestError(
+          `Empty value for parameter '${currentParameterName}': ${JSON.stringify(
+            value
+          )}`,
+          400,
+          {
+            request: options
+          }
+        );
+      }
+
+      // parse to integer before checking for enum
+      // so that string "1" will match enum with number 1
+      if (expectedType === "integer") {
+        const unparsedValue = value;
+        value = parseInt(value, 10);
+        if (isNaN(value)) {
+          throw new RequestError(
+            `Invalid value for parameter '${currentParameterName}': ${JSON.stringify(
+              unparsedValue
+            )} is NaN`,
+            400,
+            {
+              request: options
+            }
+          );
+        }
+      }
+
+      if (parameter.enum && parameter.enum.indexOf(String(value)) === -1) {
+        throw new RequestError(
+          `Invalid value for parameter '${currentParameterName}': ${JSON.stringify(
+            value
+          )}`,
+          400,
+          {
+            request: options
+          }
+        );
+      }
+
+      if (parameter.validation) {
+        const regex = new RegExp(parameter.validation);
+        if (!regex.test(value)) {
+          throw new RequestError(
+            `Invalid value for parameter '${currentParameterName}': ${JSON.stringify(
+              value
+            )}`,
+            400,
+            {
+              request: options
+            }
+          );
+        }
+      }
+
+      if (expectedType === "object" && typeof value === "string") {
+        try {
+          value = JSON.parse(value);
+        } catch (exception) {
+          throw new RequestError(
+            `JSON parse error of value for parameter '${currentParameterName}': ${JSON.stringify(
+              value
+            )}`,
+            400,
+            {
+              request: options
+            }
+          );
+        }
+      }
+
+      set(options, parameter.mapTo || currentParameterName, value);
+    });
+  });
+
+  return options;
+}