Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc-cloned / src / protobuf_js_6_common.js

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+/**
+ * @license
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+/**
+ * @module
+ * @private
+ */
+
+'use strict';
+
+var camelCase = require('lodash.camelcase');
+var client = require('./client');
+var common = require('./common');
+
+/**
+ * Get a function that deserializes a specific type of protobuf.
+ * @param {function()} cls The constructor of the message type to deserialize
+ * @param {bool=} binaryAsBase64 Deserialize bytes fields as base64 strings
+ *     instead of Buffers. Defaults to false
+ * @param {bool=} longsAsStrings Deserialize long values as strings instead of
+ *     objects. Defaults to true
+ * @return {function(Buffer):cls} The deserialization function
+ */
+exports.deserializeCls = function deserializeCls(cls, options) {
+  var conversion_options = {
+    defaults: true,
+    bytes: options.binaryAsBase64 ? String : Buffer,
+    longs: options.longsAsStrings ? String : null,
+    enums: options.enumsAsStrings ? String : null,
+    oneofs: true
+  };
+  /**
+   * Deserialize a buffer to a message object
+   * @param {Buffer} arg_buf The buffer to deserialize
+   * @return {cls} The resulting object
+   */
+  return function deserialize(arg_buf) {
+    return cls.toObject(cls.decode(arg_buf), conversion_options);
+  };
+};
+
+var deserializeCls = exports.deserializeCls;
+
+/**
+ * Get a function that serializes objects to a buffer by protobuf class.
+ * @param {function()} Cls The constructor of the message type to serialize
+ * @return {function(Cls):Buffer} The serialization function
+ */
+exports.serializeCls = function serializeCls(cls) {
+  /**
+   * Serialize an object to a Buffer
+   * @param {Object} arg The object to serialize
+   * @return {Buffer} The serialized object
+   */
+  return function serialize(arg) {
+    var message = cls.fromObject(arg);
+    return cls.encode(message).finish();
+  };
+};
+
+var serializeCls = exports.serializeCls;
+
+/**
+ * Get the fully qualified (dotted) name of a ProtoBuf.Reflect value.
+ * @param {ProtoBuf.ReflectionObject} value The value to get the name of
+ * @return {string} The fully qualified name of the value
+ */
+exports.fullyQualifiedName = function fullyQualifiedName(value) {
+  if (value === null || value === undefined) {
+    return '';
+  }
+  var name = value.name;
+  var parent_fqn = fullyQualifiedName(value.parent);
+  if (parent_fqn !== '') {
+    name = parent_fqn + '.' + name;
+  }
+  return name;
+};
+
+var fullyQualifiedName = exports.fullyQualifiedName;
+
+/**
+ * Return a map from method names to method attributes for the service.
+ * @param {ProtoBuf.Service} service The service to get attributes for
+ * @param {Object=} options Options to apply to these attributes
+ * @return {Object} The attributes map
+ */
+exports.getProtobufServiceAttrs = function getProtobufServiceAttrs(service,
+                                                                   options) {
+  var prefix = '/' + fullyQualifiedName(service) + '/';
+  service.resolveAll();
+  return common.zipObject(service.methodsArray.map(function(method) {
+    return camelCase(method.name);
+  }), service.methodsArray.map(function(method) {
+    return {
+      originalName: method.name,
+      path: prefix + method.name,
+      requestStream: !!method.requestStream,
+      responseStream: !!method.responseStream,
+      requestType: method.resolvedRequestType,
+      responseType: method.resolvedResponseType,
+      requestSerialize: serializeCls(method.resolvedRequestType),
+      requestDeserialize: deserializeCls(method.resolvedRequestType, options),
+      responseSerialize: serializeCls(method.resolvedResponseType),
+      responseDeserialize: deserializeCls(method.resolvedResponseType, options)
+    };
+  }));
+};
+
+var getProtobufServiceAttrs = exports.getProtobufServiceAttrs;
+
+exports.loadObject = function loadObject(value, options) {
+  var result = {};
+  if (!value) {
+    return value;
+  }
+  if (value.hasOwnProperty('methods')) {
+    // It's a service object
+    var service_attrs = getProtobufServiceAttrs(value, options);
+    return client.makeClientConstructor(service_attrs);
+  }
+
+  if (value.hasOwnProperty('nested')) {
+    // It's a namespace or root object
+    if (value.nested !== null && value.nested !== undefined) {
+      var values = Object.keys(value.nested).map(key => value.nested[key]);
+      values.forEach(nested => {
+        result[nested.name] = loadObject(nested, options);
+      });
+    }
+    return result;
+  }
+
+  // Otherwise, it's not something we need to change
+  return value;
+};
+
+/**
+ * The primary purpose of this method is to distinguish between reflection
+ * objects from different versions of ProtoBuf.js. This is just a heuristic,
+ * checking for properties that are (currently) specific to this version of
+ * ProtoBuf.js
+ * @param {Object} obj The object to check
+ * @return {boolean} Whether the object appears to be a Protobuf.js 6
+ *   ReflectionObject
+ */
+exports.isProbablyProtobufJs6 = function isProbablyProtobufJs6(obj) {
+  return (typeof obj.root === 'object') && (typeof obj.resolve === 'function');
+};