Stub rescheduling algo

src/task.rs

@@ -1,5 +1,43 @@
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone)]
 pub struct Task {
+    /// Issue Number for referencing the task
     pub issue_number: u64,
+
+    /// Human-readable summary of the task
     pub title: String,
+
+    /// Whether the task is open or has been completed
+    pub state: State,
+
+    /// Whether the task is a recurring one and metadata for rescheduling
+    pub recurring: Option<Recurring>,
+}
+
+#[derive(Debug, Clone)]
+pub enum State {
+    /// The task is open and pending completion.
+    ///
+    /// An optional due date may be present.
+    Open { due: Option<time::OffsetDateTime> },
+
+    /// The task has been completed at the specified time.
+    Completed { date: time::OffsetDateTime },
+}
+
+#[derive(Debug, Clone)]
+pub struct Recurring {
+    pub interval: RecurringInterval,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum RecurringInterval {
+    Months(u32),
+    Weeks(u32),
+    Days(u32),
+}
+
+impl std::fmt::Display for Task {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "#{} — \"{}\"", self.issue_number, self.title)
+    }
 }