TOTP/MFA の有効化・無効化機能の追加

<div id="managemfa" class="w3-container w3-padding-large w3-grey tab" style="display:none">
    <button type="submit" class="w3-button w3-black w3-margin-bottom" onclick="enableMFA()">Enable MFA</button>
    <button type="submit" class="w3-button w3-black w3-margin-bottom" onclick="disableMFA()">Disable MFA</button>
    <div id="qrcode"></div>
    <button type="submit" class="w3-button w3-black w3-margin-bottom" onclick="continueMFA()">Verify</button> 
</div>

/**
 *Enable MFA
 *
 *Important Note: Make sure TOTP/MFA is enabled in the user pool
 */
function enableMFA(){

  console.log("--------Start TOTP MFA Setup");
  cognitoUser.associateSoftwareToken({
    onSuccess: function(result) {
      console.log(result);
    },
    associateSecretCode: function(secretCode) {
      console.log("MFASecretCode:"+secretCode);

      var canvas = document.getElementById('qrcanvas');
      var tokenObj = cognitoUser.signInUserSession.idToken.payload;
      var totpUri = "otpauth://totp/MFA:"+ tokenObj["email"] +"?secret="+ secretCode +"&issuer=CognitoJSPOC";
      console.log(totpUri);

      var qrcode = new QRCode(document.getElementById("qrcode"), {
        text: totpUri,
        width: 128,
        height: 128,
        colorDark : "#000000",
        colorLight : "#ffffff",
        correctLevel : QRCode.CorrectLevel.H
      });
    },

    onFailure: function(err) {
      console.log(err);
    }
  });
  }
    
    
function continueMFA(){

      var totpCode = prompt("Enter software token code");
      cognitoUser.verifySoftwareToken(totpCode, 'SoftwareToken',{
        onSuccess: function(result) {
          console.log(result);

          totpMfaSettings = {
            PreferredMfa : true,
            Enabled : true
          };
          cognitoUser.setUserMfaPreference(null, totpMfaSettings, function(err, result) {
            if (err) {
              alert(err);
            }
            console.log('setUserMfaPreference call result ' + result)
          });
        },

        onFailure: function(err) {
          console.log(err);
        }
      });
}

/**
 * Disable MFA
 */
function disableMFA(){

  var mfaSettings = {
    PreferredMfa : false,
    Enabled : false
  };

  cognitoUser.setUserMfaPreference(mfaSettings, mfaSettings, function(err, result) {
    if (err) {
      console.error(err);
    }
    console.log('clear MFA call result ' + result);
  });
}