frontend: Add basic information about collections

crates/store/src/addressbook_store.rs

@@ -1,4 +1,4 @@
-use crate::{Error, addressbook::Addressbook};
+use crate::{CollectionMetadata, Error, addressbook::Addressbook};
 use async_trait::async_trait;
 use rustical_ical::AddressObject;
 
@@ -35,6 +35,12 @@ pub trait AddressbookStore: Send + Sync + 'static {
         synctoken: i64,
     ) -> Result<(Vec<AddressObject>, Vec<String>, i64), Error>;
 
+    async fn addressbook_metadata(
+        &self,
+        principal: &str,
+        addressbook_id: &str,
+    ) -> Result<CollectionMetadata, Error>;
+
     async fn get_objects(
         &self,
         principal: &str,

crates/store/src/calendar_store.rs

@@ -1,4 +1,4 @@
-use crate::{Calendar, error::Error};
+use crate::{Calendar, CollectionMetadata, error::Error};
 use async_trait::async_trait;
 use chrono::NaiveDate;
 use rustical_ical::CalendarObject;
@@ -53,6 +53,12 @@ pub trait CalendarStore: Send + Sync + 'static {
         self.get_objects(principal, cal_id).await
     }
 
+    async fn calendar_metadata(
+        &self,
+        principal: &str,
+        cal_id: &str,
+    ) -> Result<CollectionMetadata, Error>;
+
     async fn get_objects(
         &self,
         principal: &str,

crates/store/src/combined_calendar_store.rs

@@ -135,6 +135,20 @@ impl<CS: CalendarStore, BS: CalendarStore> CalendarStore for CombinedCalendarSto
         }
     }
 
+    #[inline]
+    async fn calendar_metadata(
+        &self,
+        principal: &str,
+        cal_id: &str,
+    ) -> Result<crate::CollectionMetadata, Error> {
+        if cal_id.starts_with(BIRTHDAYS_PREFIX) {
+            self.birthday_store
+                .calendar_metadata(principal, cal_id)
+                .await
+        } else {
+            self.cal_store.calendar_metadata(principal, cal_id).await
+        }
+    }
     #[inline]
     async fn get_objects(
         &self,

crates/store/src/contact_birthday_store.rs

@@ -16,7 +16,7 @@ fn birthday_calendar(addressbook: Addressbook) -> Calendar {
         id: format!("{}{}", BIRTHDAYS_PREFIX, addressbook.id),
         displayname: addressbook
             .displayname
-            .map(|name| format!("{} birthdays", name)),
+            .map(|name| format!("{name} birthdays")),
         order: 0,
         description: None,
         color: None,
@@ -104,6 +104,17 @@ impl<AS: AddressbookStore> CalendarStore for ContactBirthdayStore<AS> {
         Ok((objects, deleted_objects, new_synctoken))
     }
 
+    async fn calendar_metadata(
+        &self,
+        principal: &str,
+        cal_id: &str,
+    ) -> Result<crate::CollectionMetadata, Error> {
+        let cal_id = cal_id
+            .strip_prefix(BIRTHDAYS_PREFIX)
+            .ok_or(Error::NotFound)?;
+        self.0.addressbook_metadata(principal, cal_id).await
+    }
+
     async fn get_objects(
         &self,
         principal: &str,

crates/store/src/lib.rs

@@ -37,3 +37,11 @@ pub struct CollectionOperation {
     pub topic: String,
     pub data: CollectionOperationInfo,
 }
+
+#[derive(Default, Debug, Clone)]
+pub struct CollectionMetadata {
+    pub len: usize,
+    pub deleted_len: usize,
+    pub size: u64,
+    pub deleted_size: u64,
+}

crates/store/src/synctoken.rs

@@ -1,7 +1,7 @@
 const SYNC_NAMESPACE: &str = "github.com/lennart-k/rustical/ns/";
 
 pub fn format_synctoken(synctoken: i64) -> String {
-    format!("{}{}", SYNC_NAMESPACE, synctoken)
+    format!("{SYNC_NAMESPACE}{synctoken}")
 }
 
 pub fn parse_synctoken(synctoken: &str) -> Option<i64> {