feat(repeater): restore remote network diagnostic and scripts

closes #436

src/Config/container.ts

@@ -50,7 +50,7 @@ import { ConfigReader } from './ConfigReader';
 import { DefaultConfigReader } from './DefaultConfigReader';
 import { CliInfo } from './CliInfo';
 import { CliBuilder } from './CliBuilder';
-import { RepeaterServer, DefaultRepeaterServer } from '../Repeater';
+import { RepeaterServer, DefaultRepeaterServer , CommandHub , DefaultCommandHub } from '../Repeater';
 import { container, Lifecycle } from 'tsyringe';
 
 container
@@ -107,6 +107,13 @@ container
     },
     { lifecycle: Lifecycle.Singleton }
   )
+  .register(
+    CommandHub,
+    {
+      useClass: DefaultCommandHub
+    },
+    { lifecycle: Lifecycle.Singleton }
+  )
   .register(
     Tokens,
     {

src/Handlers/Events/NetworkTest.ts

@@ -1,9 +1,5 @@
 import { Event } from '../../Bus';
-
-export enum NetworkTestType {
-  PING = 'ping',
-  TRACEROUTE = 'traceroute'
-}
+import { NetworkTestType } from '../../Repeater';
 
 export class NetworkTest implements Event {
   constructor(

src/Handlers/Events/RegisterScripts.ts

@@ -1,5 +1,5 @@
-import { Event } from '../../Bus/Event';
+import { Event } from '../../Bus';
 
 export class RegisterScripts implements Event {
-  constructor(public readonly script: string | Record<string, string>) {}
+  constructor(public readonly script?: string | Record<string, string>) {}
 }

src/Handlers/NetworkTestHandler.ts

@@ -1,94 +1,35 @@
 import { bind, Handler } from '../Bus';
 import { NetworkTest } from './Events';
-import { NetworkTestResult } from '../Integrations';
-import { ReadlinePlatform } from '../Wizard';
-import { Helpers, logger } from '../Utils';
-import { injectable } from 'tsyringe';
-import { EOL } from 'os';
-import { URL } from 'url';
+import { CommandHub } from '../Repeater';
+import { inject, injectable } from 'tsyringe';
+
+type NetworkTestResult =
+  | {
+      output: string;
+    }
+  | {
+      error: string;
+    };
 
 @injectable()
 @bind(NetworkTest)
 export class NetworkTestHandler
   implements Handler<NetworkTest, NetworkTestResult>
 {
-  public async handle(config: NetworkTest): Promise<NetworkTestResult> {
-    const output = await this.getOutput(config);
-
-    return { output, repeaterId: config.repeaterId };
-  }
-
-  private async getOutput(config: NetworkTest): Promise<string> {
-    return new Promise((resolve, reject) => {
-      const args = ['configure', `--${config.type}`];
-
-      logger.debug('Launching "Network Diagnostic" process with cmd: %j', args);
-
-      const child = Helpers.spawn({
-        include: args,
-        exclude: ['repeater']
-      });
-
-      child.unref();
-
-      const stdout: string[] = [];
-
-      child.stdout.on('data', (data: Buffer) => {
-        const chunk = data.toString();
-        const lines: string[] = chunk
-          .split('\n')
-          .filter((line: string) => line.length > 0);
-
-        stdout.push(...lines);
+  constructor(@inject(CommandHub) private readonly commandHub: CommandHub) {}
 
-        const [first, ...rest]: string[] = [].concat(config.input);
-
-        if (chunk.indexOf(ReadlinePlatform.URLS_QUESTION) > -1) {
-          child.stdin.write(`${[first, ...rest].join(',')}${EOL}`);
-        }
-
-        if (chunk.indexOf(ReadlinePlatform.HOST_OR_IP_QUESTION) > -1) {
-          child.stdin.write(`${new URL(first).hostname}${EOL}`);
-        }
-
-        if (chunk.indexOf(ReadlinePlatform.COMPELED_MESSAGE) > -1) {
-          child.stdin.end();
-        }
-      });
-
-      child.once('error', (err: Error) => {
-        logger.warn(
-          `Failed to start "Network Diagnostic" due to %s`,
-          err.message
-        );
-        reject(err);
-      });
-
-      child.on('close', (code: number) => {
-        if (code !== 0 || stdout.length === 0) {
-          const msg = `"Network Diagnostic" did not start successfully. Process exited with code ${code}`;
-
-          logger.warn(msg);
-
-          return reject(new Error(msg));
-        }
-
-        resolve(this.processOutput(stdout));
-      });
-    });
-  }
-
-  // this is workaround of \x1B[1G control code that retype string in console
-  private processOutput(input: string[]): string {
-    return input
-      .filter(
-        (element, index, arr) =>
-          !(
-            element.endsWith('\u001b[1G') ||
-            (!!arr[index + 1] && arr[index + 1] === '\u001b[1G')
-          )
-      )
-      .filter((x) => !x.startsWith(ReadlinePlatform.URLS_QUESTION))
-      .join('\n');
+  public async handle(config: NetworkTest): Promise<NetworkTestResult> {
+    try {
+      const output = await this.commandHub.testNetwork(
+        config.type,
+        config.input
+      );
+
+      return { output };
+    } catch (e) {
+      return {
+        error: typeof e === 'string' ? e : (e as Error).message
+      };
+    }
   }
 }

src/Handlers/RegisterScriptsHandler.ts

@@ -1,27 +1,17 @@
 import { bind, Handler } from '../Bus';
-import { VirtualScripts, VirtualScriptType } from '../Scripts';
 import { RegisterScripts } from './Events';
+import { CommandHub } from '../Repeater';
 import { inject, injectable } from 'tsyringe';
 
 @injectable()
 @bind(RegisterScripts)
 export class RegisterScriptsHandler implements Handler<RegisterScripts> {
-  constructor(
-    @inject(VirtualScripts) private readonly virtualScripts: VirtualScripts
-  ) {}
+  constructor(@inject(CommandHub) private readonly commandHub: CommandHub) {}
 
   // eslint-disable-next-line @typescript-eslint/require-await
   public async handle(event: RegisterScripts): Promise<void> {
-    this.virtualScripts.clear(VirtualScriptType.REMOTE);
-
-    const { script } = event;
-
-    if (typeof script === 'string') {
-      this.virtualScripts.set('*', VirtualScriptType.REMOTE, script);
-    } else if (script) {
-      Object.entries(script).map(([wildcard, code]: [string, string]) =>
-        this.virtualScripts.set(wildcard, VirtualScriptType.REMOTE, code)
-      );
+    if (event.script) {
+      this.commandHub.compileScripts(event.script);
     }
   }
 }

src/Handlers/SendRequestHandler.ts

@@ -1,34 +1,26 @@
 import { bind, Handler } from '../Bus';
-import { Request, RequestExecutor, Response } from '../RequestExecutor';
+import { Request } from '../RequestExecutor';
 import { ExecuteScript, ForwardResponse } from './Events';
-import { injectable, injectAll } from 'tsyringe';
+import { CommandHub } from '../Repeater';
+import { inject, injectable } from 'tsyringe';
 
 @injectable()
 @bind(ExecuteScript)
 export class SendRequestHandler
   implements Handler<ExecuteScript, ForwardResponse>
 {
   constructor(
-    @injectAll(RequestExecutor)
-    private readonly requestExecutors: RequestExecutor[]
+    @inject(CommandHub)
+    private readonly commandHub: CommandHub
   ) {}
 
   public async handle(event: ExecuteScript): Promise<ForwardResponse> {
-    const { protocol } = event;
-
-    const requestExecutor = this.requestExecutors.find(
-      (x) => x.protocol === protocol
-    );
-
-    if (!requestExecutor) {
-      throw new Error(`Unsupported protocol "${protocol}"`);
-    }
-
-    const response: Response = await requestExecutor.execute(
+    const response = await this.commandHub.sendRequest(
       new Request({ ...event, correlationIdRegex: event.correlation_id_regex })
     );
 
-    const { statusCode, message, errorCode, body, headers } = response;
+    const { statusCode, message, errorCode, body, headers, protocol } =
+      response;
 
     return new ForwardResponse(
       protocol,

src/Integrations/index.ts

@@ -6,4 +6,3 @@ export * from './IntegrationClient';
 export * from './IntegrationType';
 export * from './Project';
 export * from './IntegrationOptions';
-export * from './NetworkTestResult';

src/Repeater/CommandHub.ts

@@ -0,0 +1,10 @@
+import { Request, Response } from '../RequestExecutor';
+import { NetworkTestType } from './NetworkTestType';
+
+export interface CommandHub {
+  compileScripts(script: string | Record<string, string>): void;
+  testNetwork(type: NetworkTestType, input: string | string[]): Promise<string>;
+  sendRequest(request: Request): Promise<Response>;
+}
+
+export const CommandHub: unique symbol = Symbol('CommandHub');

src/Repeater/DefaultCommandHub.ts

@@ -0,0 +1,128 @@
+import { CommandHub } from './CommandHub';
+import { NetworkTestType } from './NetworkTestType';
+import { VirtualScripts, VirtualScriptType } from '../Scripts';
+import { Helpers, logger } from '../Utils';
+import { ReadlinePlatform } from '../Wizard';
+import { Request, RequestExecutor, Response } from '../RequestExecutor';
+import { inject, injectAll } from 'tsyringe';
+import { EOL } from 'os';
+import { URL } from 'url';
+
+export class DefaultCommandHub implements CommandHub {
+  constructor(
+    @inject(VirtualScripts) private readonly virtualScripts: VirtualScripts,
+    @injectAll(RequestExecutor)
+    private readonly requestExecutors: RequestExecutor[]
+  ) {}
+
+  public compileScripts(script: string | Record<string, string>): void {
+    this.virtualScripts.clear(VirtualScriptType.REMOTE);
+
+    if (this.virtualScripts.size) {
+      logger.warn(
+        'Error Loading Script: Cannot accept scripts from the cloud when a local script is already loaded'
+      );
+
+      return;
+    }
+
+    if (typeof script === 'string') {
+      this.virtualScripts.set('*', VirtualScriptType.REMOTE, script);
+    } else {
+      Object.entries(script).map(([wildcard, code]: [string, string]) =>
+        this.virtualScripts.set(wildcard, VirtualScriptType.REMOTE, code)
+      );
+    }
+  }
+
+  public sendRequest(request: Request): Promise<Response> {
+    const { protocol } = request;
+
+    const requestExecutor = this.requestExecutors.find(
+      (x) => x.protocol === protocol
+    );
+
+    if (!requestExecutor) {
+      throw new Error(`Unsupported protocol "${protocol}"`);
+    }
+
+    return requestExecutor.execute(request);
+  }
+
+  public testNetwork(
+    type: NetworkTestType,
+    input: string | string[]
+  ): Promise<string> {
+    return new Promise((resolve, reject) => {
+      const args = ['configure', `--${type}`];
+
+      logger.debug('Launching "Network Diagnostic" process with cmd: %j', args);
+
+      const child = Helpers.spawn({
+        include: args,
+        exclude: ['repeater']
+      });
+
+      child.unref();
+
+      const stdout: string[] = [];
+
+      child.stdout.on('data', (data: Buffer) => {
+        const chunk = data.toString();
+        const lines: string[] = chunk
+          .split('\n')
+          .filter((line: string) => line.length > 0);
+
+        stdout.push(...lines);
+
+        const [first, ...rest]: string[] = [].concat(input);
+
+        if (chunk.indexOf(ReadlinePlatform.URLS_QUESTION) > -1) {
+          child.stdin.write(`${[first, ...rest].join(',')}${EOL}`);
+        }
+
+        if (chunk.indexOf(ReadlinePlatform.HOST_OR_IP_QUESTION) > -1) {
+          child.stdin.write(`${new URL(first).hostname}${EOL}`);
+        }
+
+        if (chunk.indexOf(ReadlinePlatform.COMPELED_MESSAGE) > -1) {
+          child.stdin.end();
+        }
+      });
+
+      child.once('error', (err: Error) => {
+        logger.warn(
+          `Failed to start "Network Diagnostic" due to %s`,
+          err.message
+        );
+        reject(err);
+      });
+
+      child.on('close', (code: number) => {
+        if (code !== 0 || stdout.length === 0) {
+          const msg = `"Network Diagnostic" did not start successfully. Process exited with code ${code}`;
+
+          logger.warn(msg);
+
+          return reject(new Error(msg));
+        }
+
+        resolve(this.processOutput(stdout));
+      });
+    });
+  }
+
+  // this is workaround of \x1B[1G control code that retype string in console
+  private processOutput(input: string[]): string {
+    return input
+      .filter(
+        (element, index, arr) =>
+          !(
+            element.endsWith('\u001b[1G') ||
+            (!!arr[index + 1] && arr[index + 1] === '\u001b[1G')
+          )
+      )
+      .filter((x) => !x.startsWith(ReadlinePlatform.URLS_QUESTION))
+      .join('\n');
+  }
+}