support millisecond timestamp & float second timestamp

Author: nextzhou

src/moment/date_time.rs

@@ -1,5 +1,5 @@
-use chrono::prelude::*;
 use crate::moment::{date, time};
+use chrono::prelude::*;
 use itertools::Itertools;
 
 pub fn parse(s: &str) -> Option<Vec<DateTime<Local>>> {

src/moment/timestamp.rs

@@ -1,11 +1,44 @@
 use chrono::prelude::*;
 
 pub fn parse(s: &str) -> Option<Vec<DateTime<Local>>> {
+    type TryTimestamp = fn(&str) -> Option<DateTime<Local>>;
+    let parses: Vec<TryTimestamp> = vec![parse_sec, parse_ms, parse_float_sec];
+    for p in parses {
+        if let Some(t) = p(s) {
+            return Some(vec![t]);
+        }
+    }
+    None
+}
+
+fn parse_sec(s: &str) -> Option<DateTime<Local>> {
     let sec = s.parse().ok()?;
     let t = Local.timestamp(sec, 0);
 
     if 2010 <= t.year() && t.year() <= 2030 {
-        Some(vec![t])
+        Some(t)
+    } else {
+        None
+    }
+}
+
+fn parse_ms(s: &str) -> Option<DateTime<Local>> {
+    let ms: i64 = s.parse().ok()?;
+    let t = Local.timestamp(ms / 1000, ms as u32 % 1000);
+
+    if 2010 <= t.year() && t.year() <= 2030 {
+        Some(t)
+    } else {
+        None
+    }
+}
+
+fn parse_float_sec(s: &str) -> Option<DateTime<Local>> {
+    let sec: f64 = s.parse().ok()?;
+    let t = Local.timestamp(sec as i64, 0);
+
+    if 2010 <= t.year() && t.year() <= 2030 {
+        Some(t)
     } else {
         None
     }