config()

in packages/ui/src/machines/authenticator/index.ts [137:187]

• 40 lines of code
• 2 McCabe index (conditional complexity)

          config(context, event) {
            // The CLI uses uppercased constants in `aws-exports.js`, while `parameters.json` are lowercase.
            // We use lowercase to be consistent with previous versions' values.
            const cliLoginMechanisms =
              event.data.aws_cognito_username_attributes?.map((s) =>
                s.toLowerCase()
              ) ?? [];

            const cliVerificationMechanisms =
              event.data.aws_cognito_verification_mechanisms?.map((s) =>
                s.toLowerCase()
              ) ?? [];

            const cliSignUpAttributes =
              event.data.aws_cognito_signup_attributes?.map((s) =>
                s.toLowerCase()
              ) ?? [];

            const cliSocialProviders =
              event.data.aws_cognito_social_providers?.map((s) =>
                s.toLowerCase()
              ) ?? [];

            // By default, Cognito assumes `username`, so there isn't a different username attribute like `email`.
            // We explicitly add it as a login mechanism to be consistent with Admin UI's language.
            if (cliLoginMechanisms.length === 0) {
              cliLoginMechanisms.push('username');
            }

            // Prefer explicitly configured settings over default CLI values\

            const {
              loginMechanisms,
              signUpAttributes,
              socialProviders,
              initialState,
            } = context.config;
            return {
              loginMechanisms: loginMechanisms ?? cliLoginMechanisms,
              signUpAttributes:
                signUpAttributes ??
                Array.from(
                  new Set([
                    ...cliVerificationMechanisms,
                    ...cliSignUpAttributes,
                  ])
                ),
              socialProviders: socialProviders ?? cliSocialProviders.sort(),
              initialState,
            };
          },