Refactored modules

src/traits.rs

@@ -0,0 +1,49 @@
+//! This module provides CalDAV data sources and utilities
+
+/*
+use std::error::Error;
+
+
+
+/// A Caldav data source
+pub struct DataSource {
+    client: Option<Client>,
+
+    calendars: Vec<Calendar>
+}
+
+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) -> Result<(), Box<dyn Error>> {
+        self.client = Some(Client::new(url, username, password)?);
+        Ok(())
+    }
+
+    /// Update the local database with info from the Client
+    pub fn fetch_from_server(&mut self) {
+        // TODO: how to handle conflicts?
+    }
+
+    pub fn update_changes_to_server(&self) {
+
+    }
+
+    // TODO: the API should force calling fetch_from_server before
+    pub fn calendars(&self) -> Vec<&Calendar> {
+        // TODO: what happens when a user has a reference, which is modified/updated from the server? Conflict mut/not mut?
+        // TODO: how can the user modify Tasks from a non-mut reference?
+        self.calendars
+            .iter()
+            .collect()
+    }
+}
+
+*/