mycelium-api 9.0.0-rc.7

use super::api_config::ApiConfig;

#[cfg(feature = "postgres-backend")]
use myc_adapters_shared_lib::models::RedisConfig;
#[cfg(feature = "standalone")]
use myc_config::optional_config::OptionalConfig;
#[cfg(feature = "postgres-backend")]
use myc_config::{optional_config::OptionalConfig, VaultConfig};
use myc_core::models::CoreConfig;
#[cfg(feature = "postgres-backend")]
use myc_diesel::models::config::DieselConfig;
#[cfg(feature = "standalone")]
use myc_diesel_sqlite::config::SqliteConfig;
use myc_http_tools::models::auth_config::AuthConfig;
#[cfg(feature = "standalone")]
use myc_notifier::models::LocalEmailConfig;
use myc_notifier::models::{QueueConfig, SmtpConfig};
use mycelium_base::utils::errors::MappedErrors;
use std::path::PathBuf;

#[derive(Clone)]
pub struct ConfigHandler {
    pub core: CoreConfig,
    pub api: ApiConfig,
    pub auth: AuthConfig,
    // `QueueConfig` is just dispatcher polling behavior (queue name +
    // interval), not Redis-specific -- shared by both backends.
    pub queue: QueueConfig,

    #[cfg(feature = "postgres-backend")]
    pub diesel: DieselConfig,
    #[cfg(feature = "postgres-backend")]
    pub smtp: SmtpConfig,
    #[cfg(feature = "postgres-backend")]
    pub redis: RedisConfig,
    #[cfg(feature = "postgres-backend")]
    pub vault: OptionalConfig<VaultConfig>,

    #[cfg(feature = "standalone")]
    pub sqlite: SqliteConfig,
    // Real SMTP is opt-in in standalone (SM-R8): absent by default, falls
    // through to file/stub transport (`select_local_transport`).
    #[cfg(feature = "standalone")]
    pub smtp: OptionalConfig<SmtpConfig>,
    // Opt-in local `.eml` file delivery (issue #169): absent by default, the
    // File rung of `select_local_transport`'s SMTP > File > Stub precedence.
    #[cfg(feature = "standalone")]
    pub local_email: OptionalConfig<LocalEmailConfig>,
}

impl ConfigHandler {
    pub fn init_from_file(file: PathBuf) -> Result<Self, MappedErrors> {
        Ok(Self {
            // Core configurations are used during the execution of the Mycelium
            // core functionalities, overall defined into use-cases layer.
            core: CoreConfig::from_default_config_file(file.clone())?,
            // API configuration should be used by the web server into the ports
            // layer.
            api: ApiConfig::from_default_config_file(file.clone())?,
            // Auth configuration should be used by the web server into the
            // ports.
            auth: AuthConfig::from_default_config_file(file.clone())?,
            // Queue configuration drives the email dispatcher's polling
            // behavior in both backends.
            queue: QueueConfig::from_default_config_file(file.clone())?,
            // Database configurations serves the database connector, which is
            // responsible for the communication with the database into the
            // adapters layer.
            #[cfg(feature = "postgres-backend")]
            diesel: DieselConfig::from_default_config_file(file.clone())?,
            // SMTP configuration should be used by the email sending repository
            // managements into the adapters layer.
            #[cfg(feature = "postgres-backend")]
            smtp: SmtpConfig::from_default_config_file(file.clone())?,
            // Redis configuration should be used by the redis repository
            // managements into the adapters layer.
            #[cfg(feature = "postgres-backend")]
            redis: RedisConfig::from_default_config_file(file.clone())?,
            // Vault configuration should be used by the secret resolver into
            // the domain layer.
            #[cfg(feature = "postgres-backend")]
            vault: VaultConfig::from_default_config_file(file.clone())?,
            // SQLite configuration points at the standalone database file.
            #[cfg(feature = "standalone")]
            sqlite: SqliteConfig::from_default_config_file(file.clone())?,
            // Real SMTP is opt-in in standalone -- absent `[smtp]` resolves
            // to `OptionalConfig::Disabled`, not a load error.
            #[cfg(feature = "standalone")]
            smtp: SmtpConfig::from_optional_config_file(file.clone())?,
            // Opt-in local `.eml` file delivery -- absent `[localEmail]`
            // resolves to `Disabled`, falling through to the stub transport.
            #[cfg(feature = "standalone")]
            local_email: LocalEmailConfig::from_optional_config_file(
                file.clone(),
            )?,
        })
    }
}

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

    #[cfg(feature = "postgres-backend")]
    #[test]
    fn config_full_example_toml_parses_into_config_handler() {
        let file = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
            .join("../../settings/config.full.example.toml");

        ConfigHandler::init_from_file(file).unwrap();
    }

    #[cfg(feature = "standalone")]
    #[test]
    fn config_standalone_example_toml_parses_into_config_handler() {
        let file = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
            .join("../../settings/config.standalone.example.toml");

        let config = ConfigHandler::init_from_file(file).unwrap();

        // The example ships `[localEmail]` commented out -- absent section
        // must resolve to `Disabled`, not a load error.
        assert!(matches!(config.local_email, OptionalConfig::Disabled));
    }

    // End-to-end wiring for issue #169: a config with `[localEmail]` set
    // resolves through `ConfigHandler` and feeds `select_local_transport`,
    // which then selects the file transport (SMTP > File > Stub).
    #[cfg(feature = "standalone")]
    #[test]
    fn local_email_dir_wires_through_to_file_transport() {
        use myc_notifier::repositories::{
            select_local_transport, LocalTransportKind,
        };
        use std::io::Write;

        let base = std::fs::read_to_string(
            PathBuf::from(env!("CARGO_MANIFEST_DIR"))
                .join("../../settings/config.standalone.example.toml"),
        )
        .unwrap();

        let dir = std::env::temp_dir()
            .join(format!("myc_local_email_{}", std::process::id()));
        let with_local_email = format!(
            "{base}\n[localEmail.define]\ndir = \"{}\"\n",
            dir.to_str().unwrap()
        );

        let config_path = std::env::temp_dir().join(format!(
            "myc_config_local_email_{}.toml",
            std::process::id()
        ));
        let mut handle = std::fs::File::create(&config_path).unwrap();
        handle.write_all(with_local_email.as_bytes()).unwrap();

        let config =
            ConfigHandler::init_from_file(config_path.clone()).unwrap();

        let OptionalConfig::Enabled(local_email) = config.local_email else {
            panic!("[localEmail] should resolve to Enabled");
        };
        assert_eq!(local_email.dir, dir);

        // Mirror `main.rs`: the dir is created up-front (lettre's
        // `FileTransport` will not), then fed to `select_local_transport`.
        let _ = std::fs::remove_dir_all(&dir);
        assert!(!dir.exists());
        let resolved = local_email.ensure_dir().unwrap();
        assert!(dir.is_dir());

        let selected = select_local_transport(None, Some(resolved));
        assert!(matches!(selected, LocalTransportKind::File(_)));

        let _ = std::fs::remove_file(&config_path);
        let _ = std::fs::remove_dir_all(&dir);
    }
}