async function redirectToSpotifyAuthorize()

in authorization/authorization_code_pkce/public/app.js [65:93]

• 24 lines of code
• 1 McCabe index (conditional complexity)

async function redirectToSpotifyAuthorize() {
  const possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  const randomValues = crypto.getRandomValues(new Uint8Array(64));
  const randomString = randomValues.reduce((acc, x) => acc + possible[x % possible.length], "");

  const code_verifier = randomString;
  const data = new TextEncoder().encode(code_verifier);
  const hashed = await crypto.subtle.digest('SHA-256', data);

  const code_challenge_base64 = btoa(String.fromCharCode(...new Uint8Array(hashed)))
    .replace(/=/g, '')
    .replace(/\+/g, '-')
    .replace(/\//g, '_');

  window.localStorage.setItem('code_verifier', code_verifier);

  const authUrl = new URL(authorizationEndpoint)
  const params = {
    response_type: 'code',
    client_id: clientId,
    scope: scope,
    code_challenge_method: 'S256',
    code_challenge: code_challenge_base64,
    redirect_uri: redirectUrl,
  };

  authUrl.search = new URLSearchParams(params).toString();
  window.location.href = authUrl.toString(); // Redirect the user to the authorization server for login
}