16 lines
493 B
Rust
16 lines
493 B
Rust
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//! Staleness detection for lesson cache entries.
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use std::time::{SystemTime, UNIX_EPOCH};
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/// How long (in seconds) before a lesson is considered stale.
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const STALE_THRESHOLD_SECS: u64 = 86400 * 7; // 7 days
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/// Check whether a lesson timestamp is stale.
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pub fn is_stale(updated_at: i64) -> bool {
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let now = SystemTime::now()
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.duration_since(UNIX_EPOCH)
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.unwrap_or_default()
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.as_secs() as i64;
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now.saturating_sub(updated_at) > STALE_THRESHOLD_SECS as i64
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}
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