Parsing calendars from server

src/data/calendar.rs

@@ -1,14 +1,67 @@
+use std::convert::TryFrom;
+use std::error::Error;
+
+use url::Url;
+
 use crate::data::Task;
 use crate::data::task::TaskId;
 
+use bitflags::bitflags;
+
+bitflags! {
+    pub struct SupportedComponents: u8 {
+        /// An event, such as a calendar meeting
+        const Event = 1;
+        /// A to-do item, such as a reminder
+        const Todo = 2;
+    }
+}
+
+impl TryFrom<minidom::Element> for SupportedComponents {
+    type Error = Box<dyn Error>;
+
+    /// Create an instance from an XML <supported-calendar-component-set> element
+    fn try_from(element: minidom::Element) -> Result<Self, Self::Error> {
+        if element.name() != "supported-calendar-component-set" {
+            return Err("Element must be a <supported-calendar-component-set>".into());
+        }
+
+        let mut flags = Self::empty();
+        for child in element.children() {
+            match child.attr("name") {
+                None => continue,
+                Some("VEVENT") => flags.insert(Self::Event),
+                Some("VTODO") => flags.insert(Self::Todo),
+                Some(other) => {
+                    log::warn!("Unimplemented supported component type: {:?}. Ignoring it", other);
+                    continue
+                },
+            };
+        }
+
+        Ok(flags)
+    }
+}
+
+
 /// A Caldav Calendar
+#[derive(Clone, Debug)]
 pub struct Calendar {
     name: String,
+    url: Url,
+    supported_components: SupportedComponents,
 
     tasks: Vec<Task>,
 }
 
 impl Calendar {
+    pub fn new(name: String, url: Url, supported_components: SupportedComponents) -> Self {
+        Self {
+            name, url, supported_components,
+            tasks: Vec::new(),
+        }
+    }
+
     pub fn name(&self) -> &str {
         &self.name
     }