handrolled the date parsing :)))

src/main.rs

@@ -1,18 +1,14 @@
-use std::str::FromStr;
-
-use tokio_postgres::{Client, Config, NoTls, Statement};
-
-use tokio::net::{TcpListener, TcpStream};
-
-use std::net::SocketAddr;
-use std::sync::Arc;
-
-use structopt::StructOpt;
-
-use std::collections::HashSet;
-
+use chrono::{DateTime, Local};
+use chrono::{Datelike, Month, NaiveDate, NaiveDateTime, NaiveTime, TimeZone};
 use futures_util::FutureExt;
 use futures_util::StreamExt;
+use std::collections::HashSet;
+use std::net::SocketAddr;
+use std::str::FromStr;
+use std::sync::Arc;
+use structopt::StructOpt;
+use tokio::net::{TcpListener, TcpStream};
+use tokio_postgres::{Client, Config, NoTls, Statement};
 
 type Error = Box<dyn std::error::Error>;
 
@@ -92,8 +88,6 @@ async fn main() -> Result<(), Error> {
     }
 }
 
-use chrono::{DateTime, FixedOffset, Local};
-
 async fn handle_peer_and_error(
     stream: TcpStream,
     peer: SocketAddr,
@@ -136,26 +130,38 @@ async fn handle_peer(
     Ok(())
 }
 
-/** parses a line, returning
- * ( prio
- * , time the log was recieved
- * , time the log was written according to logger
- * , name of the service that wrote the log
- * , log entry
- * )
- */
-fn parse_line(
-    line: &'_ str,
-) -> Result<
-    (
-        i16,
-        DateTime<Local>,
-        DateTime<FixedOffset>,
-        &'_ str,
-        &'_ str,
-    ),
-    Error,
-> {
+struct ParsedLine<'a> {
+    prio: i16,
+    rcvtime: DateTime<Local>,
+    logtime: DateTime<Local>,
+    // maybe this would be more correct, but i don't want to redo the database rn
+    //logtime: NaiveDateTime,
+    service: &'a str,
+    entry: &'a str,
+}
+#[test]
+fn tst_timeparse() {
+    let input = "Jul  8 01:20:30";
+    let year = 2022;
+    let parsed = parse_log_date(year, input).unwrap();
+    assert_eq!(
+        parsed,
+        NaiveDateTime::parse_from_str("2022-07-08 01:20:30", "%Y-%m-%d %H:%M:%S").unwrap()
+    )
+}
+
+fn parse_log_date(year: i32, input: &'_ str) -> Result<NaiveDateTime, Error> {
+    let mut parts = input.split(" ").map(|p| p.trim()).filter(|p| p.len() > 0);
+    let month = Month::from_str(parts.next().ok_or("no month")?)
+        .map_err(|e| format!("month parsing error: {:?}", e))?;
+    let day: u32 = parts.next().ok_or("no day")?.parse()?;
+    let date =
+        NaiveDate::from_ymd_opt(year, month.number_from_month(), day).ok_or("invalid day+moth")?;
+    let time = NaiveTime::parse_from_str(parts.next().ok_or("no time")?, "%H:%M:%S")?;
+    Ok(NaiveDateTime::new(date, time))
+}
+
+fn parse_line(line: &'_ str) -> Result<ParsedLine<'_>, Error> {
     let mut prio_and_remainder = line.splitn(2, '>');
     let prio = prio_and_remainder
         .next()
@@ -170,13 +176,11 @@ fn parse_line(
         .expect("splitn should always return a second part");
     let (date, line) = line.split_at(16);
 
-    // we need to prepend the current year and timezone, as that is not stated in the logfile
-    let now = chrono::Local::now();
-    let mut base = format!("{}", now.format("%Y %z "));
-    base.push_str(date);
-
-    let date = DateTime::parse_from_str(&base, "%Y %z %b %e %H:%M:%S ")
-        .map_err(|e| format!("could not parse {}{} {}", date, line, e))?;
+    let rcvtime = chrono::Local::now();
+    // we need to prepend the current year and add timezone, as that is not stated in the logfile
+    let logtime = parse_log_date(rcvtime.date_naive().year(), date)
+        .map_err(|e| format!("could not parse logtime {}{} {}", date, line, e))?;
+    let logtime = TimeZone::from_local_datetime(&Local, &logtime).unwrap();
 
     let mut parts = line.splitn(2, ':');
 
@@ -187,6 +191,12 @@ fn parse_line(
         .ok_or("could not split pid from service")?
         .trim();
 
-    let log = parts.next().ok_or("could not parse logfile")?.trim();
-    Ok((prio, now, date, service, log))
+    let entry = parts.next().ok_or("could not parse logfile")?.trim();
+    Ok(ParsedLine {
+        prio,
+        rcvtime,
+        logtime,
+        service,
+        entry,
+    })
 }