Initial API structre

src/data/mod.rs

@@ -0,0 +1,55 @@
+//! This module is the data source of the Caldav items
+//!
+//! This gives access to data from both the server and a local database for quick retrieval when the app starts
+
+use std::sync::Arc;
+
+mod calendar;
+mod tasks;
+mod client;
+
+pub use calendar::Calendar;
+pub use tasks::Task;
+use client::Client;
+
+// TODO: consider using references here
+//       (there will be no issue with still-borrowed-data when the DataSource is destroyed, but will it play well with sync stuff?)
+type CalendarView = Arc<Calendar>;
+type TaskView = Arc<Task>;
+
+/// A Caldav data source
+pub struct DataSource {
+    client: Option<Client>,
+
+    calendars: Vec<CalendarView>
+}
+
+impl DataSource {
+    /// Create a new data source
+    pub fn new() -> Self {
+        Self{
+            client: None,
+            calendars: Vec::new(),
+        }
+    }
+
+    /// Tell this data source what the source server is
+    pub fn set_server(&mut self, url: String, username: String, password: String) {
+        self.client = Client::new(url, username, password);
+    }
+
+    /// Update the local database with info from the Client
+    pub fn fetch_from_server(&self) {
+        // TODO: how to handle conflicts?
+    }
+
+    pub fn calendars(&self) -> Vec<CalendarView> {
+        self.calendars
+    }
+}
+
+impl Drop for DataSource {
+    fn drop(&mut self) {
+        // TODO: display a warning in case some CalendarViews still have a refcount > 0
+    }
+}