initial commit

exercises/06_ticket_management/13_index/src/lib.rs

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+// TODO: Implement `Index<&TicketId>` and `Index<TicketId>` for `TicketStore`.
+
+use ticket_fields::{TicketDescription, TicketTitle};
+
+#[derive(Clone)]
+pub struct TicketStore {
+    tickets: Vec<Ticket>,
+    counter: u64,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct TicketId(u64);
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct Ticket {
+    pub id: TicketId,
+    pub title: TicketTitle,
+    pub description: TicketDescription,
+    pub status: Status,
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct TicketDraft {
+    pub title: TicketTitle,
+    pub description: TicketDescription,
+}
+
+#[derive(Clone, Debug, Copy, PartialEq)]
+pub enum Status {
+    ToDo,
+    InProgress,
+    Done,
+}
+
+impl TicketStore {
+    pub fn new() -> Self {
+        Self {
+            tickets: Vec::new(),
+            counter: 0,
+        }
+    }
+
+    pub fn add_ticket(&mut self, ticket: TicketDraft) -> TicketId {
+        let id = TicketId(self.counter);
+        self.counter += 1;
+        let ticket = Ticket {
+            id,
+            title: ticket.title,
+            description: ticket.description,
+            status: Status::ToDo,
+        };
+        self.tickets.push(ticket);
+        id
+    }
+
+    pub fn get(&self, id: TicketId) -> Option<&Ticket> {
+        self.tickets.iter().find(|&t| t.id == id)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::{Status, TicketDraft, TicketStore};
+    use ticket_fields::test_helpers::{ticket_description, ticket_title};
+
+    #[test]
+    fn works() {
+        let mut store = TicketStore::new();
+
+        let draft1 = TicketDraft {
+            title: ticket_title(),
+            description: ticket_description(),
+        };
+        let id1 = store.add_ticket(draft1.clone());
+        let ticket1 = &store[id1];
+        assert_eq!(draft1.title, ticket1.title);
+        assert_eq!(draft1.description, ticket1.description);
+        assert_eq!(ticket1.status, Status::ToDo);
+
+        let draft2 = TicketDraft {
+            title: ticket_title(),
+            description: ticket_description(),
+        };
+        let id2 = store.add_ticket(draft2);
+        let ticket2 = &store[&id2];
+
+        assert_ne!(id1, id2);
+    }
+}