diff --git a/src/calendar/remote_calendar.rs b/src/calendar/remote_calendar.rs
index 0fb6cde..883c6c8 100644
--- a/src/calendar/remote_calendar.rs
+++ b/src/calendar/remote_calendar.rs
@@ -1,7 +1,6 @@
 use std::collections::{HashMap, HashSet};
 use std::error::Error;
 
-use url::Url;
 use chrono::{DateTime, Utc};
 use async_trait::async_trait;
 
@@ -10,19 +9,36 @@ use crate::calendar::SupportedComponents;
 use crate::calendar::CalendarId;
 use crate::item::ItemId;
 use crate::item::Item;
+use crate::resource::Resource;
+
+static TASKS_BODY: &str = r#"
+    <c:calendar-query xmlns:d="DAV:" xmlns:c="urn:ietf:params:xml:ns:caldav">
+        <d:prop>
+            <d:getetag />
+        </d:prop>
+        <c:filter>
+            <c:comp-filter name="VCALENDAR">
+                <c:comp-filter name="VTODO" />
+            </c:comp-filter>
+        </c:filter>
+    </c:calendar-query>
+"#;
+
+
+
 
 /// A CalDAV calendar created by a [`Client`](crate::client::Client).
 #[derive(Clone)]
 pub struct RemoteCalendar {
     name: String,
-    url: Url,
+    resource: Resource,
     supported_components: SupportedComponents
 }
 
 impl RemoteCalendar {
-    pub fn new(name: String, url: Url, supported_components: SupportedComponents) -> Self {
+    pub fn new(name: String, resource: Resource, supported_components: SupportedComponents) -> Self {
         Self {
-            name, url, supported_components
+            name, resource, supported_components,
         }
     }
 }
@@ -30,23 +46,40 @@ impl RemoteCalendar {
 #[async_trait]
 impl PartialCalendar for RemoteCalendar {
     fn name(&self) -> &str { &self.name }
-    fn id(&self) -> &CalendarId { &self.url }
+    fn id(&self) -> &CalendarId { &self.resource.url() }
     fn supported_components(&self) -> crate::calendar::SupportedComponents {
         self.supported_components
     }
 
     /// Returns the items that have been last-modified after `since`
     async fn get_items_modified_since(&self, since: Option<DateTime<Utc>>, _filter: Option<crate::calendar::SearchFilter>)
-        -> HashMap<ItemId, &Item>
+        -> Result<HashMap<ItemId, &Item>, Box<dyn Error>>
     {
         log::error!("Not implemented");
-        HashMap::new()
+        Ok(HashMap::new())
     }
 
     /// Get the IDs of all current items in this calendar
-    async fn get_item_ids(&mut self) -> HashSet<ItemId> {
-        log::error!("Not implemented");
-        HashSet::new()
+    async fn get_item_ids(&self) -> Result<HashSet<ItemId>, Box<dyn Error>> {
+        let responses = crate::client::sub_request_and_extract_elems(&self.resource, "REPORT", TASKS_BODY.to_string(), "response").await?;
+
+        let mut item_ids = HashSet::new();
+        for response in responses {
+            let item_url = crate::utils::find_elem(&response, "href")
+                .map(|elem| self.resource.combine(&elem.text()));
+
+            match item_url {
+                None => {
+                    log::warn!("Unable to extract HREF");
+                    continue;
+                },
+                Some(resource) => {
+                    item_ids.insert(ItemId::from(&resource));
+                },
+            };
+        }
+
+        Ok(item_ids)
     }
 
     /// Returns a particular item