Add several parser methods for Time

src/time/parser.rs

@@ -70,7 +70,13 @@ impl<'a> Parser<'a> {
             Format::Extended => self.text.get(5..7),
         };
         if let Some(m) = month {
-            let month = m.parse()?;
+            let month = match m.parse() {
+                Ok(m) => m,
+                Err(_) => {
+                    self.mode = Mode::TimeZone;
+                    return Ok(());
+                }
+            };
             if month > 12 {
                 return Err(Error::InvalidMonth);
             }
@@ -89,7 +95,13 @@ impl<'a> Parser<'a> {
             Format::Extended => self.text.get(8..10),
         };
         if let Some(d) = day {
-            let day = d.parse()?;
+            let day = match d.parse() {
+                Ok(d) => d,
+                Err(_) => {
+                    self.mode = Mode::TimeZone;
+                    return Ok(());
+                }
+            };
             let max = match self.month {
                 Some(1|3|5|7|10|12) => 31,
                 Some(2) => {
@@ -127,21 +139,69 @@ impl<'a> Parser<'a> {
 
     fn parse_hour(&mut self) -> Result<(), Error> {
         assert_eq!(self.mode, Mode::Hour);
-        todo!()
+        let hour = match self.format {
+            Format::Basic => self.text.get(9..11),
+            Format::Extended => self.text.get(11..13),
+        };
+        if let Some(h) = hour {
+            let hour = match h.parse() {
+                Ok(h) => h,
+                Err(_) => {
+                    self.mode = Mode::TimeZone;
+                    return Ok(());
+                }
+            };
+            if hour > 24 {
+                return Err(Error::InvalidHour);
+            }
+            self.hour = Some(hour);
+            self.mode = Mode::Minute;
+        } else {
+            self.mode = Mode::TimeZone;
+        }
+        Ok(())
     }
 
     fn parse_minute(&mut self) -> Result<(), Error> {
         assert_eq!(self.mode, Mode::Minute);
-        todo!()
+        let minute = match self.format {
+            Format::Basic => self.text.get(11..13),
+            Format::Extended => self.text.get(14..16),
+        };
+        if let Some(m) = minute {
+            let minute = match m.parse() {
+                Ok(m) => m,
+                Err(_) => {
+                    self.mode = Mode::TimeZone;
+                    return Ok(());
+                }
+            };
+            if minute > 60 {
+                return Err(Error::InvalidMinute);
+            }
+            self.minute = Some(minute);
+            self.mode = Mode::Second;
+        } else {
+            self.mode = Mode::TimeZone;
+        }
+        Ok(())
     }
 
     fn parse_second(&mut self) -> Result<(), Error> {
         assert_eq!(self.mode, Mode::Second);
+        let second = match self.format {
+            Format::Basic => self.text.get(13..15),
+            Format::Extended => self.text.get(17..19),
+        };
         todo!()
     }
 
     fn parse_timezone(&mut self) -> Result<(), Error> {
         assert_eq!(self.mode, Mode::TimeZone);
+        let tz = match self.format {
+            Format::Basic => self.text.get(15..),
+            Format::Extended => self.text.get(19..),
+        };
         todo!()
     }