cochranblock 0.5.0

#![allow(non_camel_case_types, non_snake_case, dead_code, unused_imports)]

// Unlicense — cochranblock.org
// Contributors: Mattbusel (XFactor), GotEmCoach, KOVA, Claude Opus 4.6, SuperNinja, Composer 1.5, Google Gemini Pro 3

use chrono::{Duration, Utc};
use uuid::Uuid;

#[derive(Clone, Debug, serde::Serialize, serde::Deserialize)]
pub struct t3 {
    pub s37: String,
    pub s10: String,
    pub s13: String,
    pub s14: String,
}

impl t3 {
    /// f18 = create_session. Why: 24h TTL per c0; UUID for unguessable id.
    pub fn f18(username: &str) -> Self {
        let now = Utc::now();
        let expires = now + Duration::hours(24);
        Self {
            s37: Uuid::new_v4().to_string(),
            s10: username.to_string(),
            s13: now.to_rfc3339(),
            s14: expires.to_rfc3339(),
        }
    }

    /// f19 = validate_session. Why: Expiry check without DB hit for cached sessions.
    pub fn f19(&self) -> bool {
        chrono::DateTime::parse_from_rfc3339(&self.s14)
            .map(|dt| dt.with_timezone(&Utc) > Utc::now())
            .unwrap_or(false)
    }
}