94 lines
2.7 KiB
Rust
94 lines
2.7 KiB
Rust
use std::collections::VecDeque;
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use crate::log::{LogEvent, LogLevel, LogSource};
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pub struct LogService {
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events: VecDeque<LogEvent>,
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capacity: usize,
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next_seq: u64,
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}
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impl LogService {
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pub fn new(capacity: usize) -> Self {
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Self {
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events: VecDeque::with_capacity(capacity),
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capacity,
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next_seq: 0,
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}
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}
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pub fn log(&mut self, ts_ms: u64, frame: u64, level: LogLevel, source: LogSource, tag: u16, msg: String) {
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if self.events.len() >= self.capacity {
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self.events.pop_front();
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}
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self.events.push_back(LogEvent {
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seq: self.next_seq,
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ts_ms,
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frame,
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level,
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source,
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tag,
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msg,
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});
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self.next_seq += 1;
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}
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pub fn get_recent(&self, n: usize) -> Vec<LogEvent> {
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self.events.iter().rev().take(n).cloned().collect::<Vec<_>>().into_iter().rev().collect()
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}
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pub fn get_after(&self, seq: u64) -> Vec<LogEvent> {
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self.events.iter().filter(|e| e.seq > seq).cloned().collect()
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}
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pub fn last_seq(&self) -> Option<u64> {
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self.events.back().map(|e| e.seq)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_ring_buffer_capacity() {
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let mut service = LogService::new(3);
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service.log(100, 1, LogLevel::Info, LogSource::Pos, 0, "Log 1".to_string());
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service.log(110, 1, LogLevel::Info, LogSource::Pos, 0, "Log 2".to_string());
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service.log(120, 1, LogLevel::Info, LogSource::Pos, 0, "Log 3".to_string());
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assert_eq!(service.events.len(), 3);
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assert_eq!(service.events[0].msg, "Log 1");
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service.log(130, 1, LogLevel::Info, LogSource::Pos, 0, "Log 4".to_string());
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assert_eq!(service.events.len(), 3);
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assert_eq!(service.events[0].msg, "Log 2");
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assert_eq!(service.events[2].msg, "Log 4");
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}
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#[test]
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fn test_get_recent() {
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let mut service = LogService::new(10);
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for i in 0..5 {
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service.log(i as u64, 1, LogLevel::Info, LogSource::Pos, 0, format!("Log {}", i));
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}
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let recent = service.get_recent(2);
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assert_eq!(recent.len(), 2);
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assert_eq!(recent[0].msg, "Log 3");
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assert_eq!(recent[1].msg, "Log 4");
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}
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#[test]
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fn test_get_after() {
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let mut service = LogService::new(10);
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for i in 0..5 {
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service.log(i as u64, 1, LogLevel::Info, LogSource::Pos, 0, format!("Log {}", i));
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}
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let after = service.get_after(2); // seqs are 0, 1, 2, 3, 4. Should return 3 and 4.
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assert_eq!(after.len(), 2);
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assert_eq!(after[0].msg, "Log 3");
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assert_eq!(after[1].msg, "Log 4");
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}
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}
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