export async function generateReview()

in devai-vscode-extension/src/review.ts [60:118]
42 lines of code
5 McCabe index (conditional complexity)

export async function generateReview() {
  vscode.window.showInformationMessage('Generating code review...');
  const modelName = vscode.workspace.getConfiguration().get<string>('google.gemini.textModel', 'models/gemini-1.5-pro');

  // Get API Key from local user configuration
  const apiKey = vscode.workspace.getConfiguration().get<string>('google.gemini.apiKey');
  if (!apiKey) {
    vscode.window.showErrorMessage('API key not configured. Check your settings.');
    return;
  }

  const genai = new GoogleGenerativeAI(apiKey);
  const model = genai.getGenerativeModel({model: modelName});

  // Text selection
  const editor = vscode.window.activeTextEditor;
  if (!editor) {
    console.debug('Abandon: no open text editor.');
    return;
  }

  const selection = editor.selection;
  const selectedCode = editor.document.getText(selection);

  var DEVAI_REVIEW_PROMPT = await readSecret(REVIEW_PROMPT_SM);

  if (DEVAI_REVIEW_PROMPT === null) {
    // DEVAI_REVIEW_PROMPT is null, so assign the value of PROMPT to it
    DEVAI_REVIEW_PROMPT = PROMPT;
  }
  // Build the full prompt using the template.
  const fullPrompt = `${DEVAI_REVIEW_PROMPT}
    ${CODE_LABEL}
    ${selectedCode}
    ${REVIEW_LABEL}
    `;

  const result = await model.generateContent(fullPrompt);
  const response = await result.response;
  const comment = response.text();  

  // Insert before selection
  editor.edit((editBuilder) => {
    // Copy the indent from the first line of the selection.
    const trimmed = selectedCode.trimStart();
    const padding = selectedCode.substring(0, selectedCode.length - trimmed.length);

    // TODO(you!): Support other comment styles.
    const commentPrefix = '# ';
    let pyComment = comment.split('\n').map((l: string) => `${padding}${commentPrefix}${l}`).join('\r');
    if (pyComment.search(/\n$/) === -1) {
      // Add a final newline if necessary.
      pyComment += "\n";
    }
    let reviewIntro = padding + commentPrefix + "Devai Code review: (generated)\n";
    editBuilder.insert(selection.start, reviewIntro);
    editBuilder.insert(selection.start, pyComment);
  });
}