Add loading of mock scenarios

extensions/ql-vscode/package.json

@@ -657,6 +657,14 @@
       {
         "command": "codeQL.mockGitHubApiServer.cancelRecording",
         "title": "CodeQL: Mock GitHub API Server: Cancel Scenario Recording"
+      },
+      {
+        "command": "codeQL.mockGitHubApiServer.loadScenario",
+        "title": "CodeQL: Mock GitHub API Server: Load Scenario"
+      },
+      {
+        "command": "codeQL.mockGitHubApiServer.unloadScenario",
+        "title": "CodeQL: Mock GitHub API Server: Unload Scenario"
       }
     ],
     "menus": {
@@ -1128,6 +1136,14 @@
         {
           "command": "codeQL.mockGitHubApiServer.cancelRecording",
           "when": "config.codeQL.mockGitHubApiServer.enabled && codeQL.mockGitHubApiServer.recording"
+        },
+        {
+          "command": "codeQL.mockGitHubApiServer.loadScenario",
+          "when": "config.codeQL.mockGitHubApiServer.enabled && !codeQL.mockGitHubApiServer.recording"
+        },
+        {
+          "command": "codeQL.mockGitHubApiServer.unloadScenario",
+          "when": "config.codeQL.mockGitHubApiServer.enabled && codeQL.mockGitHubApiServer.scenarioLoaded"
         }
       ],
       "editor/context": [

extensions/ql-vscode/src/extension.ts

@@ -1211,6 +1211,18 @@ async function activateWithInstalledDistribution(
       async () => await mockServer.cancelRecording(),
     )
   );
+  ctx.subscriptions.push(
+    commandRunner(
+      'codeQL.mockGitHubApiServer.loadScenario',
+      async () => await mockServer.loadScenario(),
+    )
+  );
+  ctx.subscriptions.push(
+    commandRunner(
+      'codeQL.mockGitHubApiServer.unloadScenario',
+      async () => await mockServer.unloadScenario(),
+    )
+  );
 
   await commands.executeCommand('codeQLDatabases.removeOrphanedDatabases');
 

extensions/ql-vscode/src/mocks/gh-api-request.ts

@@ -74,3 +74,28 @@ export type GitHubApiRequest =
   | GetVariantAnalysisRequest
   | GetVariantAnalysisRepoRequest
   | GetVariantAnalysisRepoResultRequest;
+
+export const isGetRepoRequest = (
+  request: GitHubApiRequest
+): request is GetRepoRequest =>
+  request.request.kind === RequestKind.GetRepo;
+
+export const isSubmitVariantAnalysisRequest = (
+  request: GitHubApiRequest
+): request is SubmitVariantAnalysisRequest =>
+  request.request.kind === RequestKind.SubmitVariantAnalysis;
+
+export const isGetVariantAnalysisRequest = (
+  request: GitHubApiRequest
+): request is GetVariantAnalysisRequest =>
+  request.request.kind === RequestKind.GetVariantAnalysis;
+
+export const isGetVariantAnalysisRepoRequest = (
+  request: GitHubApiRequest
+): request is GetVariantAnalysisRepoRequest =>
+  request.request.kind === RequestKind.GetVariantAnalysisRepo;
+
+export const isGetVariantAnalysisRepoResultRequest = (
+  request: GitHubApiRequest
+): request is GetVariantAnalysisRepoResultRequest =>
+  request.request.kind === RequestKind.GetVariantAnalysisRepoResult;

extensions/ql-vscode/src/mocks/mock-gh-api-server.ts

@@ -1,11 +1,14 @@
+import * as path from 'path';
 import * as fs from 'fs-extra';
-import { commands, env, ExtensionContext, ExtensionMode, Uri, window } from 'vscode';
+import { commands, env, ExtensionContext, ExtensionMode, QuickPickItem, Uri, window } from 'vscode';
 import { setupServer, SetupServerApi } from 'msw/node';
 
 import { getMockGitHubApiServerScenariosPath, MockGitHubApiConfigListener } from '../config';
 import { DisposableObject } from '../pure/disposable-object';
 
 import { Recorder } from './recorder';
+import { createRequestHandlers } from './request-handlers';
+import { getDirectoryNamesInsidePath } from '../pure/files';
 
 /**
  * Enables mocking of the GitHub API server via HTTP interception, using msw.
@@ -44,12 +47,46 @@ export class MockGitHubApiServer extends DisposableObject {
     this.isListening = false;
   }
 
-  public loadScenario(): void {
-    // TODO: Implement logic to load a scenario from a directory.
+  public async loadScenario(): Promise<void> {
+    const scenariosPath = await this.getScenariosPath();
+    if (!scenariosPath) {
+      return;
+    }
+
+    const scenarioNames = await getDirectoryNamesInsidePath(scenariosPath);
+    const scenarioQuickPickItems = scenarioNames.map(s => ({ label: s }));
+    const quickPickOptions = {
+      placeHolder: 'Select a scenario to load',
+    };
+    const selectedScenario = await window.showQuickPick<QuickPickItem>(
+      scenarioQuickPickItems,
+      quickPickOptions);
+    if (!selectedScenario) {
+      return;
+    }
+
+    const scenarioName = selectedScenario.label;
+    const scenarioPath = path.join(scenariosPath, scenarioName);
+
+    const handlers = await createRequestHandlers(scenarioPath);
+    this.server.resetHandlers();
+    this.server.use(...handlers);
+
+    // Set a value in the context to track whether we have a scenario loaded. 
+    // This allows us to use this to show/hide commands (see package.json)
+    await commands.executeCommand('setContext', 'codeQL.mockGitHubApiServer.scenarioLoaded', true);
+
+    await window.showInformationMessage(`Loaded scenario '${scenarioName}'`);
   }
 
-  public listScenarios(): void {
-    // TODO: Implement logic to list all available scenarios.
+  public async unloadScenario(): Promise<void> {
+    if (!this.isScenarioLoaded()) {
+      await window.showInformationMessage('No scenario currently loaded');
+    }
+    else {
+      await this.unloadAllScenarios();
+      await window.showInformationMessage('Unloaded scenario');
+    }
   }
 
   public async startRecording(): Promise<void> {
@@ -58,6 +95,11 @@ export class MockGitHubApiServer extends DisposableObject {
       return;
     }
 
+    if (this.isScenarioLoaded()) {
+      await this.unloadAllScenarios();
+      void window.showInformationMessage('A scenario was loaded so it has been unloaded');
+    }
+
     this.recorder.start();
     // Set a value in the context to track whether we are recording. This allows us to use this to show/hide commands (see package.json)
     await commands.executeCommand('setContext', 'codeQL.mockGitHubApiServer.recording', true);
@@ -156,6 +198,15 @@ export class MockGitHubApiServer extends DisposableObject {
     return directories[0].fsPath;
   }
 
+  private isScenarioLoaded(): boolean {
+    return this.server.listHandlers().length > 0;
+  }
+
+  private async unloadAllScenarios(): Promise<void> {
+    this.server.resetHandlers();
+    await commands.executeCommand('setContext', 'codeQL.mockGitHubApiServer.scenarioLoaded', false);
+  }
+
   private setupConfigListener(): void {
     // The config "changes" from the default at startup, so we need to call onConfigChange() to ensure the server is
     // started if required.

extensions/ql-vscode/src/mocks/request-handlers.ts

@@ -0,0 +1,136 @@
+import * as path from 'path';
+import * as fs from 'fs-extra';
+import { DefaultBodyType, MockedRequest, rest, RestHandler } from 'msw';
+import {
+  GitHubApiRequest,
+  isGetRepoRequest,
+  isGetVariantAnalysisRepoRequest,
+  isGetVariantAnalysisRepoResultRequest,
+  isGetVariantAnalysisRequest,
+  isSubmitVariantAnalysisRequest
+} from './gh-api-request';
+
+const baseUrl = 'https://api.github.com';
+
+export type RequestHandler = RestHandler<MockedRequest<DefaultBodyType>>;
+
+export async function createRequestHandlers(scenarioDirPath: string): Promise<RequestHandler[]> {
+  const requests = await readRequestFiles(scenarioDirPath);
+
+  const handlers = [
+    createGetRepoRequestHandler(requests),
+    createSubmitVariantAnalysisRequestHandler(requests),
+    createGetVariantAnalysisRequestHandler(requests),
+    ...createGetVariantAnalysisRepoRequestHandlers(requests),
+    ...createGetVariantAnalysisRepoResultRequestHandlers(requests),
+  ];
+
+  return handlers;
+}
+
+async function readRequestFiles(scenarioDirPath: string): Promise<GitHubApiRequest[]> {
+  const files = await fs.readdir(scenarioDirPath);
+
+  const orderedFiles = files.sort((a, b) => {
+    const aNum = parseInt(a.split('-')[0]);
+    const bNum = parseInt(b.split('-')[0]);
+    return aNum - bNum;
+  });
+
+  const requests: GitHubApiRequest[] = [];
+  for (const file of orderedFiles) {
+    const filePath = path.join(scenarioDirPath, file);
+    const request: GitHubApiRequest = await fs.readJson(filePath, { encoding: 'utf8' });
+    requests.push(request);
+  }
+
+  return requests;
+}
+
+function createGetRepoRequestHandler(requests: GitHubApiRequest[]): RequestHandler {
+  const getRepoRequests = requests.filter(isGetRepoRequest);
+
+  if (getRepoRequests.length > 1) {
+    throw Error('More than one get repo request found');
+  }
+
+  const getRepoRequest = getRepoRequests[0];
+
+  return rest.get(`${baseUrl}/repos/:owner/:name`, (_req, res, ctx) => {
+    return res(
+      ctx.status(getRepoRequest.response.status),
+      ctx.json(getRepoRequest.response.body),
+    );
+  });
+}
+
+function createSubmitVariantAnalysisRequestHandler(requests: GitHubApiRequest[]): RequestHandler {
+  const submitVariantAnalysisRequests = requests.filter(isSubmitVariantAnalysisRequest);
+
+  if (submitVariantAnalysisRequests.length > 1) {
+    throw Error('More than one submit variant analysis request found');
+  }
+
+  const getRepoRequest = submitVariantAnalysisRequests[0];
+
+  return rest.post(`${baseUrl}/repositories/:controllerRepoId/code-scanning/codeql/variant-analyses`, (_req, res, ctx) => {
+    return res(
+      ctx.status(getRepoRequest.response.status),
+      ctx.json(getRepoRequest.response.body),
+    );
+  });
+}
+
+function createGetVariantAnalysisRequestHandler(requests: GitHubApiRequest[]): RequestHandler {
+  const getVariantAnalysisRequests = requests.filter(isGetVariantAnalysisRequest);
+  let requestIndex = 0;
+
+  // During the lifetime of a variant analysis run, there are multiple requests
+  // to get the variant analysis. We need to return different responses for each
+  // request, so keep an index of the request and return the appropriate response.
+  return rest.get(`${baseUrl}/repositories/:controllerRepoId/code-scanning/codeql/variant-analyses/:variantAnalysisId`, (_req, res, ctx) => {
+    const request = getVariantAnalysisRequests[requestIndex];
+
+    if (requestIndex < getVariantAnalysisRequests.length - 1) {
+      // If there are more requests to come, increment the index.
+      requestIndex++;
+    }
+
+    return res(
+      ctx.status(request.response.status),
+      ctx.json(request.response.body),
+    );
+  });
+}
+
+function createGetVariantAnalysisRepoRequestHandlers(requests: GitHubApiRequest[]): RequestHandler[] {
+  const getVariantAnalysisRepoRequests = requests.filter(isGetVariantAnalysisRepoRequest);
+
+  return getVariantAnalysisRepoRequests.map(request => rest.get(
+    `${baseUrl}/repositories/:controllerRepoId/code-scanning/codeql/variant-analyses/:variantAnalysisId/repositories/${request.request.repositoryId}`,
+    (_req, res, ctx) => {
+      return res(
+        ctx.status(request.response.status),
+        ctx.json(request.response.body),
+      );
+    }));
+}
+
+function createGetVariantAnalysisRepoResultRequestHandlers(requests: GitHubApiRequest[]): RequestHandler[] {
+  const getVariantAnalysisRepoResultRequests = requests.filter(isGetVariantAnalysisRepoResultRequest);
+
+  return getVariantAnalysisRepoResultRequests.map(request => rest.get(
+    `https://objects-origin.githubusercontent.com/codeql-query-console/codeql-variant-analysis-repo-tasks/:variantAnalysisId/${request.request.repositoryId}/*`,
+    (_req, res, ctx) => {
+      if (request.response.body) {
+        return res(
+          ctx.status(request.response.status),
+          ctx.body(request.response.body),
+        );
+      } else {
+        return res(
+          ctx.status(request.response.status),
+        );
+      }
+    }));
+}

extensions/ql-vscode/src/pure/files.ts

@@ -28,3 +28,25 @@ export async function gatherQlFiles(paths: string[]): Promise<[string[], boolean
   }
   return [Array.from(gatheredUris), dirFound];
 }
+
+/**
+ * Lists the names of directories inside the given path.
+ * @param path The path to the directory to read.
+ * @returns the names of the directories inside the given path.
+ */
+export async function getDirectoryNamesInsidePath(path: string): Promise<string[]> {
+  if (!(await fs.pathExists(path))) {
+    throw Error(`Path does not exist: ${path}`);
+  }
+  if (!(await fs.stat(path)).isDirectory()) {
+    throw Error(`Path is not a directory: ${path}`);
+  }
+
+  const dirItems = await fs.readdir(path, { withFileTypes: true });
+
+  const dirNames = dirItems
+    .filter(dirent => dirent.isDirectory())
+    .map(dirent => dirent.name);
+
+  return dirNames;
+}