3 files changed, 11 insertions, 15 deletions
diff --git a/src/date.rs b/src/date.rs
index f77b5d5..c329ac3 100644
--- a/src/date.rs
+++ b/src/date.rs
@@ -17,7 +17,7 @@ pub enum Date {
 
 
 impl Date {
-    pub fn empty() -> Date {
+    pub fn new() -> Date {
         Date::Time(UTC.timestamp(0, 0))
     }
 
@@ -26,10 +26,6 @@ impl Date {
         Date::Time(UTC.from_utc_datetime(&Utc::now().naive_utc()))
     }
 
-    pub fn is_empty(&self) -> bool {
-        *self == Date::empty()
-    }
-
     pub fn parse(date_str: &str, time_zone: &str) -> Result<Self, EventError> {
         let absolute_time = date_str.chars().rev().next().unwrap() == 'Z';
         let tz: Tz = if absolute_time {
diff --git a/src/event.rs b/src/event.rs
index d086295..db32b22 100644
--- a/src/event.rs
+++ b/src/event.rs
@@ -38,8 +38,8 @@ impl Event {
             location: "".to_string(),
             description: "".to_string(),
             status: Status::Confirmed,
-            start: Date::empty(),
-            end: End::Date(Date::empty()),
+            start: Date::new(),
+            end: End::Date(Date::new()),
         };
     }
 
diff --git a/src/periodic.rs b/src/periodic.rs
index b4bf7bf..0c52a9b 100644
--- a/src/periodic.rs
+++ b/src/periodic.rs
@@ -12,8 +12,8 @@ pub struct Periodic {
     pub event: Event,
     pub freq: Freq,
     pub interval: i64,
-    pub count: i64,
-    pub until: Date,
+    pub count: Option<i64>,
+    pub until: Option<Date>,
 }
 
 #[derive(Debug)]
@@ -33,8 +33,8 @@ impl Periodic {
             event: Event::new(),
             freq: Freq::Secondly,
             interval: 1,
-            until: Date::empty(),
-            count: 0,
+            count: None,
+            until: None,
         }
     }
 
@@ -42,8 +42,8 @@ impl Periodic {
         match param {
             "FREQ" => self.freq = value.parse()?,
             "INTERVAL" => self.interval = value.parse()?,
-            "COUNT" => self.count = value.parse()?,
-            "UNTIL" => self.until = Date::parse(&value, "")?,
+            "COUNT" => self.count = Some(value.parse()?),
+            "UNTIL" => self.until = Some(Date::parse(&value, "")?),
             _ => (),
         }
         Ok(())
@@ -55,8 +55,8 @@ impl Periodic {
         let mut events = Vec::new();
         let mut count = 0;
         while start <= *last {
-            if (!self.until.is_empty() && start <= self.until) ||
-                (count != 0 && count >= self.count)
+            if (self.until.is_some() && start <= self.until.unwrap()) ||
+                (self.count.is_some() && count >= self.count.unwrap())
             {
                 break;
             }