@cute-dw/core
Version:
This TypeScript library is the main part of a more powerfull package designed for the fast WEB software development. The cornerstone of the library is the **DataStore** class, which might be useful when you need a full control of the data, but do not need
147 lines • 22.4 kB
JavaScript
import { HttpParams } from "@angular/common/http";
import { Ciphers } from "../Ciphers";
import { Objects } from "../Objects";
export const JSONRPC_VERSION_2 = "2.0";
export const JSONRPC_VERSION = JSONRPC_VERSION_2;
/**
* This class consists exclusively of the static methods that operate on or return Request/Response objects that follow [JSON-RPC 2.0 Specification](https://www.jsonrpc.org/specification)
* @since 0.5.0
*/
export class JsonRpc {
/**
* Creates a `Request` object to a Server that follows JSON-RPC protocol
* @param method A String containing the name of the method to be invoked. Method names that begin with the word rpc followed by a period character (U+002E or ASCII 46) are reserved for rpc-internal methods and extensions and MUST NOT be used for anything else.
* @param params A Structured value that holds the parameter values to be used during the invocation of the method. This member MAY be omitted.
* @param id An identifier established by the Client that MUST contain a String, Number, or NULL value if included.
* @returns `Request` object in JSON-RPC 2.0 specification
*/
static createRequest(method, params, id) {
let args = undefined;
id = id ?? Ciphers.hashCode(Ciphers.uuid_v4());
if (params) {
args = {};
if (typeof params === "string") {
params = new HttpParams({ fromString: params });
}
if (params instanceof HttpParams) {
let arr;
params.keys().forEach(key => {
arr = params.getAll(key);
if (arr) {
args[key] = arr.length > 1 ? [...arr] : arr[0];
}
else {
args[key] = null;
}
});
}
else {
args = { ...params };
}
}
return { jsonrpc: JSONRPC_VERSION_2, method, params: args, id };
}
/**
* Creates a `Notification` object to a Server that follows JSON-RPC protocol
* @param method A String containing the name of the method to be invoked. Method names that begin with the word rpc followed by a period character (U+002E or ASCII 46) are reserved for rpc-internal methods and extensions and MUST NOT be used for anything else.
* @param params A Structured value that holds the parameter values to be used during the invocation of the method. This member MAY be omitted.
* @returns `Notification` object in JSON-RPC 2.0 specification
*/
static createNotification(method, params) {
let args = undefined;
if (params) {
args = {};
if (typeof params === "string") {
params = new HttpParams({ fromString: params });
}
if (params instanceof HttpParams) {
let arr;
params.keys().forEach(key => {
arr = params.getAll(key);
if (arr) {
args[key] = arr.length > 1 ? [...arr] : arr[0];
}
else {
args[key] = null;
}
});
}
else {
args = { ...params };
}
}
return { jsonrpc: JSONRPC_VERSION_2, method, params: args };
}
/**
* Creates a `Response` object to a Server that follows JSON-RPC protocol
* @param id An identifier established by the Client that MUST contain a String, Number, or NULL value if included.
* @param data A value that is applied to a _result_ or an _error_ property depending on the `success` value
* @param success A boolean value that determines the type of the `Response` object
* @returns `Response` object in JSON-RPC 2.0 specification
*/
static createResponse(id, data, success = true) {
return { jsonrpc: JSONRPC_VERSION_2, id, result: (success ? data : undefined), error: (!success ? data : undefined) };
}
static toResultResponse(obj) {
return JsonRpc.createResponse(obj.id, obj.result, true);
}
static toErrorResponse(obj) {
return JsonRpc.createResponse(obj.id, obj.error, false);
}
/**
* Converts a specified object to a valid JSON-RPC `Response` object
* @param obj Object to transform
* @returns `Response` object in JSON-RPC 2.0 specification
*/
static toResponse(obj) {
if (JsonRpc.isResponseObject(obj)) {
return obj;
}
if (obj.error !== undefined) {
return JsonRpc.toErrorResponse(obj);
}
return JsonRpc.toResultResponse(obj);
}
/**
* Checks if the specified object `obj` is a valid `Request` object of the JSON-RPC 2.0 specification
* @param obj Object to test
* @returns _true_ if the object `obj` is a valid JSON-RPC 2.0 `Request` object, else _false_
*/
static isRequestObject(obj) {
return Objects.isObject(obj)
&& obj.jsonrpc === JSONRPC_VERSION_2
&& obj.method
&& obj.id != null;
//&& obj.id !== undefined;
}
/**
* Checks if the specified object `obj` is a valid `Notification` object of the JSON-RPC 2.0 specification
* @param obj Object to test
* @returns _true_ if the object `obj` is a valid JSON-RPC 2.0 `Notification` object, else _false_
*/
static isNotificationObject(obj) {
return Objects.isObject(obj)
&& obj.jsonrpc === JSONRPC_VERSION_2
&& obj.method
&& obj.id == null;
//&& obj.id === undefined;
}
/**
* Checks if the specified object `obj` is a valid `Response` object of the JSON-RPC 2.0 specification
* @param obj Object to test
* @returns _true_ if the object `obj` is a valid JSON-RPC 2.0 `Response` object, else _false_
*/
static isResponseObject(obj) {
return Objects.isObject(obj)
&& obj.jsonrpc === JSONRPC_VERSION_2
&& obj.id !== undefined
&& (obj.result !== undefined || obj.error !== undefined);
}
static isResultResponse(obj) {
return JsonRpc.isResponseObject(obj) && (obj.result !== undefined && obj.error === undefined);
}
static isErrorResponse(obj) {
return JsonRpc.isResponseObject(obj) && (obj.error !== undefined);
}
}
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The value SHOULD normally not be Null and Numbers SHOULD NOT contain fractional parts */\nexport type JsonRpcId = number | string | null;  // null - can be interpreted by the server side as a notification call\n/** Parameters for the rpc call MUST be provided as a Structured value. Either by-position through an Array or by-name through an Object. */\nexport type JsonRpcParams = {[key:string]: any} | [];\n/** Type of JSON-RPC `Request` object */\nexport type JsonRpcRequest = { jsonrpc: typeof JSONRPC_VERSION_2, method: string, id: JsonRpcId, params?: JsonRpcParams};\n/** Type of JSON-RPC `Notification` object */\nexport type JsonRpcNotification = Omit<JsonRpcRequest, \"id\">;\n/** When a rpc call encounters an error, the Response Object MUST contain the error member with a value that is an Object */\nexport type JsonRpcError = {code: number, message: string, data?: any};\n/** Type of JSON-RPC `Response` object. `result` member is REQUIRED on success. `error` member is REQUIRED on error. */\nexport type JsonRpcResponse = { jsonrpc: typeof JSONRPC_VERSION_2, id: JsonRpcId, result?: any, error?: JsonRpcError };\n/** Type of JSON-RPC `Result` Response object */\nexport type JsonRpcResultResponse = Omit<JsonRpcResponse, \"error\">;\n/** Type of JSON-RPC `Error` Response object */\nexport type JsonRpcErrorResponse = Omit<JsonRpcResponse, \"result\">;\n\n/**\n * This class consists exclusively of the static methods that operate on or return Request/Response objects that follow [JSON-RPC 2.0 Specification](https://www.jsonrpc.org/specification)\n * @since 0.5.0\n */\nexport class JsonRpc {\n\n  /**\n   * Creates a `Request` object to a Server that follows JSON-RPC protocol\n   * @param method A String containing the name of the method to be invoked. Method names that begin with the word rpc followed by a period character (U+002E or ASCII 46) are reserved for rpc-internal methods and extensions and MUST NOT be used for anything else.\n   * @param params A Structured value that holds the parameter values to be used during the invocation of the method. This member MAY be omitted.\n   * @param id An identifier established by the Client that MUST contain a String, Number, or NULL value if included.\n   * @returns `Request` object in JSON-RPC 2.0 specification\n   */\n  static createRequest<T extends JsonRpcRequest>(method: string, params?: JsonRpcParams | HttpParams | string, id?: JsonRpcId): T {\n    let args: any = undefined;\n    id = id ?? Ciphers.hashCode( Ciphers.uuid_v4() );\n    if (params) {\n      args = {};\n      if (typeof params === \"string\") {\n        params = new HttpParams({fromString: params});\n      }\n      if (params instanceof HttpParams) {\n        let arr;\n        params.keys().forEach(key=>{\n          arr = (<HttpParams>params).getAll(key);\n          if (arr) {\n            args[key] = arr.length > 1 ? [...arr] : arr[0];\n          } else {\n            args[key] = null;\n          }\n        });\n      } else {\n        args = {...params};\n      }\n    }\n    return { jsonrpc: JSONRPC_VERSION_2, method, params: args, id } as T;\n  }\n  /**\n   * Creates a `Notification` object to a Server that follows JSON-RPC protocol\n   * @param method A String containing the name of the method to be invoked. Method names that begin with the word rpc followed by a period character (U+002E or ASCII 46) are reserved for rpc-internal methods and extensions and MUST NOT be used for anything else.\n   * @param params A Structured value that holds the parameter values to be used during the invocation of the method. This member MAY be omitted.\n   * @returns `Notification` object in JSON-RPC 2.0 specification\n   */\n  static createNotification<T extends JsonRpcNotification>(method: string, params?: JsonRpcParams | HttpParams | string): T {\n    let args: any = undefined;\n    if (params) {\n      args = {};\n      if (typeof params === \"string\") {\n        params = new HttpParams({fromString: params});\n      }\n      if (params instanceof HttpParams) {\n        let arr;\n        params.keys().forEach(key=>{\n          arr = (<HttpParams>params).getAll(key);\n          if (arr) {\n            args[key] = arr.length > 1 ? [...arr] : arr[0];\n          } else {\n            args[key] = null;\n          }\n        });\n      } else {\n        args = {...params};\n      }\n    }\n    return { jsonrpc: JSONRPC_VERSION_2, method, params: args } as T;\n  }\n  /**\n   * Creates a `Response` object to a Server that follows JSON-RPC protocol\n   * @param id An identifier established by the Client that MUST contain a String, Number, or NULL value if included.\n   * @param data A value that is applied to a _result_ or an _error_ property depending on the `success` value\n   * @param success A boolean value that determines the type of the `Response` object\n   * @returns `Response` object in JSON-RPC 2.0 specification\n   */\n  static createResponse<T extends JsonRpcResponse>(id: JsonRpcId, data?: any, success: boolean = true): T {\n    return { jsonrpc: JSONRPC_VERSION_2, id, result: (success ? data : undefined), error: (!success ? data : undefined) } as T;\n  }\n\n  private static toResultResponse(obj: { id: JsonRpcId, result?: any }): JsonRpcResultResponse {\n    return JsonRpc.createResponse(obj.id, obj.result, true);\n  }\n\n  private static toErrorResponse(obj: { id: JsonRpcId, error?: any }): JsonRpcErrorResponse {\n    return JsonRpc.createResponse(obj.id, obj.error, false);\n  }\n  /**\n   * Converts a specified object to a valid JSON-RPC `Response` object\n   * @param obj  Object to transform\n   * @returns `Response` object in JSON-RPC 2.0 specification\n   */\n  static toResponse<T extends JsonRpcResponse>(obj: { id: JsonRpcId, result?: any, error?: any }): T {\n    if (JsonRpc.isResponseObject(obj)) {\n      return obj as T;\n    } if (obj.error !== undefined) {\n      return JsonRpc.toErrorResponse(obj) as T;\n    }\n    return JsonRpc.toResultResponse(obj) as T;\n  }\n  /**\n   * Checks if the specified object `obj` is a valid `Request` object of the JSON-RPC 2.0 specification\n   * @param obj Object to test\n   * @returns _true_ if the object `obj` is a valid JSON-RPC 2.0 `Request` object, else _false_\n   */\n  static isRequestObject(obj: any): obj is JsonRpcRequest {\n    return Objects.isObject(obj)\n      && obj.jsonrpc === JSONRPC_VERSION_2\n      && obj.method\n      && obj.id != null;\n      //&& obj.id !== undefined;\n  }\n  /**\n   * Checks if the specified object `obj` is a valid `Notification` object of the JSON-RPC 2.0 specification\n   * @param obj Object to test\n   * @returns _true_ if the object `obj` is a valid JSON-RPC 2.0 `Notification` object, else _false_\n   */\n  static isNotificationObject(obj: any): obj is JsonRpcNotification {\n    return Objects.isObject(obj)\n      && obj.jsonrpc === JSONRPC_VERSION_2\n      && obj.method\n      && obj.id == null;\n      //&& obj.id === undefined;\n  }\n  /**\n   * Checks if the specified object `obj` is a valid `Response` object of the JSON-RPC 2.0 specification\n   * @param obj Object to test\n   * @returns _true_ if the object `obj` is a valid JSON-RPC 2.0 `Response` object, else _false_\n   */\n  static isResponseObject(obj: any): obj is JsonRpcResponse {\n    return Objects.isObject(obj)\n      && obj.jsonrpc === JSONRPC_VERSION_2\n      && obj.id !== undefined\n      && (obj.result !== undefined || obj.error !== undefined);\n  }\n\n  static isResultResponse(obj: any): boolean {\n    return JsonRpc.isResponseObject(obj) && (obj.result !== undefined && obj.error === undefined);\n  }\n\n  static isErrorResponse(obj: any): boolean {\n    return JsonRpc.isResponseObject(obj) && (obj.error !== undefined);\n  }\n\n}\n"]}