initial implementation of sync-collectioncaldav

4 files changed, 154 insertions, 15 deletions

diff --git a/aero-collections/src/davdag.rs b/aero-collections/src/davdag.rs
index 36a9016..74e745f 100644
--- a/aero-collections/src/davdag.rs
+++ b/aero-collections/src/davdag.rs
@@ -42,7 +42,7 @@ pub struct DavDag {
 
 #[derive(Clone, Debug)]
 pub enum SyncChange {
-    Ok(FileName),
+    Ok((FileName, BlobId)),
     NotFound(FileName),
 }
 
@@ -150,7 +150,8 @@ impl DavDag {
 
         // Record the change in the ephemeral synchronization map
         if let Some(sync_token) = sync_token {
-            self.change.insert(sync_token, SyncChange::Ok(filename));
+            self.change
+                .insert(sync_token, SyncChange::Ok((filename, blob_id)));
         }
     }
 
diff --git a/aero-proto/src/dav/controller.rs b/aero-proto/src/dav/controller.rs
index 4bae68a..7e1f416 100644
--- a/aero-proto/src/dav/controller.rs
+++ b/aero-proto/src/dav/controller.rs
@@ -7,9 +7,10 @@ use hyper::body::Frame;
 use hyper::body::Incoming;
 use hyper::{body::Bytes, Request, Response};
 
-use aero_collections::user::User;
+use aero_collections::{davdag::Token, user::User};
 use aero_dav::caltypes as cal;
 use aero_dav::realization::{self, All};
+use aero_dav::synctypes as sync;
 use aero_dav::types as dav;
 use aero_dav::versioningtypes as vers;
 use aero_ical::query::is_component_match;
@@ -17,7 +18,7 @@ use aero_ical::query::is_component_match;
 use crate::dav::codec;
 use crate::dav::codec::{depth, deserialize, serialize, text_body};
 use crate::dav::node::DavNode;
-use crate::dav::resource::RootNode;
+use crate::dav::resource::{RootNode, BASE_TOKEN_URI};
 
 pub(super) type ArcUser = std::sync::Arc<User>;
 pub(super) type HttpResponse = Response<UnsyncBoxBody<Bytes, std::io::Error>>;
@@ -109,6 +110,7 @@ impl Controller {
         // Internal representation that will handle processed request
         let (mut ok_node, mut not_found) = (Vec::new(), Vec::new());
         let calprop: Option<cal::CalendarSelector<All>>;
+        let extension: Option<realization::Multistatus>;
 
         // Extracting request information
         match cal_report {
@@ -136,15 +138,54 @@ impl Controller {
                     };
                 }
                 calprop = m.selector;
+                extension = None;
             }
             vers::Report::Extension(realization::ReportType::Cal(cal::ReportType::Query(q))) => {
                 calprop = q.selector;
+                extension = None;
                 ok_node = apply_filter(self.node.children(&self.user).await, &q.filter)
                     .try_collect()
                     .await?;
             }
-            vers::Report::Extension(realization::ReportType::Sync(_sync_col)) => {
-                todo!()
+            vers::Report::Extension(realization::ReportType::Sync(sync_col)) => {
+                calprop = Some(cal::CalendarSelector::Prop(sync_col.prop));
+
+                if sync_col.limit.is_some() {
+                    tracing::warn!("limit is not supported, ignoring");
+                }
+                if matches!(sync_col.sync_level, sync::SyncLevel::Infinite) {
+                    tracing::debug!("aerogramme calendar collections are not nested");
+                }
+
+                let token = match sync_col.sync_token {
+                    sync::SyncTokenRequest::InitialSync => None,
+                    sync::SyncTokenRequest::IncrementalSync(token_raw) => {
+                        // parse token
+                        if token_raw.len() != BASE_TOKEN_URI.len() + 48 {
+                            anyhow::bail!("invalid token length")
+                        }
+                        let token = token_raw[BASE_TOKEN_URI.len()..]
+                            .parse()
+                            .or(Err(anyhow::anyhow!("can't parse token")))?;
+                        Some(token)
+                    }
+                };
+                // do the diff
+                let new_token: Token;
+                (new_token, ok_node, not_found) = match self.node.diff(token).await {
+                    Ok(t) => t,
+                    Err(e) => match e.kind() {
+                        std::io::ErrorKind::NotFound => return Ok(Response::builder()
+                            .status(410)
+                            .body(text_body("Diff failed, token might be expired"))?),
+                        _ => return Ok(Response::builder()
+                                .status(500)
+                                .body(text_body("Server error, maybe this operation is not supported on this collection"))?),
+                    },
+                };
+                extension = Some(realization::Multistatus::Sync(sync::Multistatus {
+                    sync_token: sync::SyncToken(new_token.to_string()),
+                }));
             }
             _ => {
                 return Ok(Response::builder()
@@ -162,7 +203,7 @@ impl Controller {
 
         serialize(
             status,
-            Self::multistatus(&self.user, ok_node, not_found, props).await,
+            Self::multistatus(&self.user, ok_node, not_found, props, extension).await,
         )
     }
 
@@ -208,7 +249,7 @@ impl Controller {
         let not_found = vec![];
         serialize(
             status,
-            Self::multistatus(&self.user, nodes, not_found, propname).await,
+            Self::multistatus(&self.user, nodes, not_found, propname, None).await,
         )
     }
 
@@ -277,6 +318,7 @@ impl Controller {
         nodes: Vec<Box<dyn DavNode>>,
         not_found: Vec<dav::Href>,
         props: Option<dav::PropName<All>>,
+        extension: Option<realization::Multistatus>,
     ) -> dav::Multistatus<All> {
         // Collect properties on existing objects
         let mut responses: Vec<dav::Response<All>> = match props {
@@ -309,7 +351,7 @@ impl Controller {
         dav::Multistatus::<All> {
             responses,
             responsedescription: None,
-            extension: None,
+            extension,
         }
     }
 }
diff --git a/aero-proto/src/dav/node.rs b/aero-proto/src/dav/node.rs
index 877342a..0a83f8c 100644
--- a/aero-proto/src/dav/node.rs
+++ b/aero-proto/src/dav/node.rs
@@ -3,7 +3,7 @@ use futures::future::{BoxFuture, FutureExt};
 use futures::stream::{BoxStream, StreamExt};
 use hyper::body::Bytes;
 
-use aero_collections::davdag::Etag;
+use aero_collections::davdag::{Etag, Token};
 use aero_dav::realization::All;
 use aero_dav::types as dav;
 
@@ -55,8 +55,14 @@ pub(crate) trait DavNode: Send {
     fn content<'a>(&self) -> Content<'a>;
     /// Delete
     fn delete(&self) -> BoxFuture<std::result::Result<(), std::io::Error>>;
-
-    //@FIXME maybe add etag, maybe add a way to set content
+    /// Sync
+    fn diff<'a>(
+        &self,
+        sync_token: Option<Token>,
+    ) -> BoxFuture<
+        'a,
+        std::result::Result<(Token, Vec<Box<dyn DavNode>>, Vec<dav::Href>), std::io::Error>,
+    >;
 
     /// Utility function to get a propname response from a node
     fn response_propname(&self, user: &ArcUser) -> dav::Response<All> {
diff --git a/aero-proto/src/dav/resource.rs b/aero-proto/src/dav/resource.rs
index 1ae766c..297a1c1 100644
--- a/aero-proto/src/dav/resource.rs
+++ b/aero-proto/src/dav/resource.rs
@@ -8,7 +8,7 @@ use futures::{future::BoxFuture, future::FutureExt};
 
 use aero_collections::{
     calendar::Calendar,
-    davdag::{BlobId, Etag},
+    davdag::{BlobId, Etag, SyncChange, Token},
     user::User,
 };
 use aero_dav::acltypes as acl;
@@ -21,6 +21,8 @@ use aero_dav::versioningtypes as vers;
 use super::node::PropertyStream;
 use crate::dav::node::{Content, DavNode, PutPolicy};
 
+pub const BASE_TOKEN_URI: &str = "https://aerogramme.0/sync/";
+
 #[derive(Clone)]
 pub(crate) struct RootNode {}
 impl DavNode for RootNode {
@@ -117,6 +119,16 @@ impl DavNode for RootNode {
     fn delete(&self) -> BoxFuture<std::result::Result<(), std::io::Error>> {
         async { Err(std::io::Error::from(std::io::ErrorKind::PermissionDenied)) }.boxed()
     }
+
+    fn diff<'a>(
+        &self,
+        _sync_token: Option<Token>,
+    ) -> BoxFuture<
+        'a,
+        std::result::Result<(Token, Vec<Box<dyn DavNode>>, Vec<dav::Href>), std::io::Error>,
+    > {
+        async { Err(std::io::Error::from(std::io::ErrorKind::Unsupported)) }.boxed()
+    }
 }
 
 #[derive(Clone)]
@@ -229,6 +241,15 @@ impl DavNode for HomeNode {
     fn delete(&self) -> BoxFuture<std::result::Result<(), std::io::Error>> {
         async { Err(std::io::Error::from(std::io::ErrorKind::PermissionDenied)) }.boxed()
     }
+    fn diff<'a>(
+        &self,
+        _sync_token: Option<Token>,
+    ) -> BoxFuture<
+        'a,
+        std::result::Result<(Token, Vec<Box<dyn DavNode>>, Vec<dav::Href>), std::io::Error>,
+    > {
+        async { Err(std::io::Error::from(std::io::ErrorKind::Unsupported)) }.boxed()
+    }
 }
 
 #[derive(Clone)]
@@ -353,6 +374,15 @@ impl DavNode for CalendarListNode {
     fn delete(&self) -> BoxFuture<std::result::Result<(), std::io::Error>> {
         async { Err(std::io::Error::from(std::io::ErrorKind::PermissionDenied)) }.boxed()
     }
+    fn diff<'a>(
+        &self,
+        _sync_token: Option<Token>,
+    ) -> BoxFuture<
+        'a,
+        std::result::Result<(Token, Vec<Box<dyn DavNode>>, Vec<dav::Href>), std::io::Error>,
+    > {
+        async { Err(std::io::Error::from(std::io::ErrorKind::Unsupported)) }.boxed()
+    }
 }
 
 #[derive(Clone)]
@@ -480,8 +510,8 @@ impl DavNode for CalendarNode {
                         )) => match col.token().await {
                             Ok(token) => dav::Property::Extension(all::Property::Sync(
                                 sync::Property::SyncToken(sync::SyncToken(format!(
-                                    "https://aerogramme.0/sync/{}",
-                                    token
+                                    "{}{}",
+                                    BASE_TOKEN_URI, token
                                 ))),
                             )),
                             _ => return Err(n.clone()),
@@ -535,6 +565,48 @@ impl DavNode for CalendarNode {
     fn delete(&self) -> BoxFuture<std::result::Result<(), std::io::Error>> {
         async { Err(std::io::Error::from(std::io::ErrorKind::PermissionDenied)) }.boxed()
     }
+    fn diff<'a>(
+        &self,
+        sync_token: Option<Token>,
+    ) -> BoxFuture<
+        'a,
+        std::result::Result<(Token, Vec<Box<dyn DavNode>>, Vec<dav::Href>), std::io::Error>,
+    > {
+        let col = self.col.clone();
+        let calname = self.calname.clone();
+        async move {
+            let sync_token = sync_token.unwrap();
+            let (new_token, listed_changes) = match col.diff(sync_token).await {
+                Ok(v) => v,
+                Err(e) => {
+                    tracing::info!(err=?e, "token resolution failed, maybe a forgotten token");
+                    return Err(std::io::Error::from(std::io::ErrorKind::NotFound));
+                }
+            };
+
+            let mut ok_nodes: Vec<Box<dyn DavNode>> = vec![];
+            let mut rm_nodes: Vec<dav::Href> = vec![];
+            for change in listed_changes.into_iter() {
+                match change {
+                    SyncChange::Ok((filename, blob_id)) => {
+                        let child = Box::new(EventNode {
+                            col: col.clone(),
+                            calname: calname.clone(),
+                            filename,
+                            blob_id,
+                        });
+                        ok_nodes.push(child);
+                    }
+                    SyncChange::NotFound(filename) => {
+                        rm_nodes.push(dav::Href(filename));
+                    }
+                }
+            }
+
+            Ok((new_token, ok_nodes, rm_nodes))
+        }
+        .boxed()
+    }
 }
 
 #[derive(Clone)]
@@ -757,6 +829,15 @@ impl DavNode for EventNode {
         }
         .boxed()
     }
+    fn diff<'a>(
+        &self,
+        _sync_token: Option<Token>,
+    ) -> BoxFuture<
+        'a,
+        std::result::Result<(Token, Vec<Box<dyn DavNode>>, Vec<dav::Href>), std::io::Error>,
+    > {
+        async { Err(std::io::Error::from(std::io::ErrorKind::Unsupported)) }.boxed()
+    }
 }
 
 #[derive(Clone)]
@@ -849,4 +930,13 @@ impl DavNode for CreateEventNode {
         // Nothing to delete
         async { Ok(()) }.boxed()
     }
+    fn diff<'a>(
+        &self,
+        _sync_token: Option<Token>,
+    ) -> BoxFuture<
+        'a,
+        std::result::Result<(Token, Vec<Box<dyn DavNode>>, Vec<dav::Href>), std::io::Error>,
+    > {
+        async { Err(std::io::Error::from(std::io::ErrorKind::Unsupported)) }.boxed()
+    }
 }