armature-auth 0.1.0

Authentication and authorization for Armature framework
Documentation 
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// Auth0 OAuth2 provider

use crate::Result;
use crate::oauth2::{
    GenericOAuth2Provider, OAuth2Config, OAuth2Provider, OAuth2Token, OAuth2UserInfo,
};
use async_trait::async_trait;
use oauth2::CsrfToken;
use url::Url;

/// Auth0 provider configuration
#[derive(Debug, Clone)]
pub struct Auth0Config {
    pub client_id: String,
    pub client_secret: String,
    pub redirect_url: String,
    pub domain: String, // e.g., "myapp.us.auth0.com" or "mycompany.auth0.com"
    pub scopes: Vec<String>,
    pub audience: Option<String>, // Optional API audience
}

impl Auth0Config {
    pub fn new(
        client_id: String,
        client_secret: String,
        redirect_url: String,
        domain: String,
    ) -> Self {
        Self {
            client_id,
            client_secret,
            redirect_url,
            domain,
            scopes: vec![
                "openid".to_string(),
                "email".to_string(),
                "profile".to_string(),
            ],
            audience: None,
        }
    }

    pub fn with_scopes(mut self, scopes: Vec<String>) -> Self {
        self.scopes = scopes;
        self
    }

    pub fn with_audience(mut self, audience: String) -> Self {
        self.audience = Some(audience);
        self
    }
}

/// Auth0 provider
pub struct Auth0Provider {
    inner: GenericOAuth2Provider,
    audience: Option<String>,
}

impl Auth0Provider {
    pub fn new(config: Auth0Config) -> Result<Self> {
        let auth_url = format!("https://{}/authorize", config.domain);
        let token_url = format!("https://{}/oauth/token", config.domain);
        let user_info_url = format!("https://{}/userinfo", config.domain);

        let oauth2_config = OAuth2Config::new(
            config.client_id,
            config.client_secret,
            auth_url,
            token_url,
            config.redirect_url,
        )
        .with_scopes(config.scopes)
        .with_user_info_url(user_info_url);

        let inner = GenericOAuth2Provider::new("auth0".to_string(), oauth2_config)?;

        Ok(Self {
            inner,
            audience: config.audience,
        })
    }
}

#[async_trait]
impl OAuth2Provider for Auth0Provider {
    fn name(&self) -> &str {
        self.inner.name()
    }

    fn authorization_url(&self) -> Result<(Url, CsrfToken)> {
        let (mut url, csrf) = self.inner.authorization_url()?;

        // Add audience parameter if specified
        if let Some(ref audience) = self.audience {
            url.query_pairs_mut().append_pair("audience", audience);
        }

        Ok((url, csrf))
    }

    async fn exchange_code(&self, code: String) -> Result<OAuth2Token> {
        self.inner.exchange_code(code).await
    }

    async fn get_user_info(&self, token: &OAuth2Token) -> Result<OAuth2UserInfo> {
        self.inner.get_user_info(token).await
    }

    async fn refresh_token(&self, refresh_token: String) -> Result<OAuth2Token> {
        self.inner.refresh_token(refresh_token).await
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_auth0_config() {
        let config = Auth0Config::new(
            "client_id".to_string(),
            "client_secret".to_string(),
            "http://localhost:3000/callback".to_string(),
            "myapp.us.auth0.com".to_string(),
        );

        assert_eq!(config.domain, "myapp.us.auth0.com");
        assert_eq!(config.scopes.len(), 3);
    }

    #[test]
    fn test_auth0_with_audience() {
        let config = Auth0Config::new(
            "client_id".to_string(),
            "client_secret".to_string(),
            "http://localhost:3000/callback".to_string(),
            "myapp.us.auth0.com".to_string(),
        )
        .with_audience("https://api.myapp.com".to_string());

        assert!(config.audience.is_some());
    }
}