Refactor room version support, add default room version config

src/client_server/capabilities.rs

@@ -1,9 +1,8 @@
-use crate::{Result, Ruma};
+use crate::{database::DatabaseGuard, Result, Ruma};
 use ruma::{
     api::client::discovery::get_capabilities::{
         self, Capabilities, RoomVersionStability, RoomVersionsCapability,
     },
-    RoomVersionId,
 };
 use std::collections::BTreeMap;
 
@@ -11,15 +10,26 @@ use std::collections::BTreeMap;
 ///
 /// Get information on the supported feature set and other relevent capabilities of this server.
 pub async fn get_capabilities_route(
+    db: DatabaseGuard,
     _body: Ruma<get_capabilities::v3::IncomingRequest>,
 ) -> Result<get_capabilities::v3::Response> {
     let mut available = BTreeMap::new();
-    available.insert(RoomVersionId::V5, RoomVersionStability::Stable);
-    available.insert(RoomVersionId::V6, RoomVersionStability::Stable);
+    if db.globals.allow_unstable_room_versions() {
+        for room_version in &db.globals.unstable_room_versions {
+            available.insert(room_version.clone(), RoomVersionStability::Stable);
+        }
+    } else {
+        for room_version in &db.globals.unstable_room_versions {
+            available.insert(room_version.clone(), RoomVersionStability::Unstable);
+        }
+    }
+    for room_version in &db.globals.stable_room_versions {
+        available.insert(room_version.clone(), RoomVersionStability::Stable);
+    }
 
     let mut capabilities = Capabilities::new();
     capabilities.room_versions = RoomVersionsCapability {
-        default: RoomVersionId::V6,
+        default: db.globals.default_room_version(),
         available,
     };
 

src/client_server/membership.rs

@@ -492,7 +492,7 @@ async fn join_room_by_id_helper(
                     federation::membership::prepare_join_event::v1::Request {
                         room_id,
                         user_id: sender_user,
-                        ver: &[RoomVersionId::V5, RoomVersionId::V6],
+                        ver: &db.globals.supported_room_versions(),
                     },
                 )
                 .await;
@@ -507,11 +507,7 @@ async fn join_room_by_id_helper(
         let (make_join_response, remote_server) = make_join_response_and_server?;
 
         let room_version = match make_join_response.room_version {
-            Some(room_version)
-                if room_version == RoomVersionId::V5 || room_version == RoomVersionId::V6 =>
-            {
-                room_version
-            }
+            Some(room_version) if db.rooms.is_supported_version(&db, &room_version) => room_version,
             _ => return Err(Error::BadServerResponse("Room version is not supported")),
         };
 
@@ -828,9 +824,12 @@ pub(crate) async fn invite_helper<'a>(
                 })
                 .transpose()?;
 
-            // If there was no create event yet, assume we are creating a version 6 room right now
+            // If there was no create event yet, assume we are creating a room with the default
+            // version right now
             let room_version_id = create_event_content
-                .map_or(RoomVersionId::V6, |create_event| create_event.room_version);
+                .map_or(db.globals.default_room_version(), |create_event| {
+                    create_event.room_version
+                });
             let room_version =
                 RoomVersion::new(&room_version_id).expect("room version is supported");
 

src/client_server/room.rs

@@ -23,7 +23,7 @@ use ruma::{
     },
     int,
     serde::{CanonicalJsonObject, JsonObject},
-    RoomAliasId, RoomId, RoomVersionId,
+    RoomAliasId, RoomId,
 };
 use serde_json::{json, value::to_raw_value};
 use std::{cmp::max, collections::BTreeMap, sync::Arc};
@@ -100,7 +100,7 @@ pub async fn create_room_route(
 
     let room_version = match body.room_version.clone() {
         Some(room_version) => {
-            if room_version == RoomVersionId::V5 || room_version == RoomVersionId::V6 {
+            if db.rooms.is_supported_version(&db, &room_version) {
                 room_version
             } else {
                 return Err(Error::BadRequest(
@@ -109,7 +109,7 @@ pub async fn create_room_route(
                 ));
             }
         }
-        None => RoomVersionId::V6,
+        None => db.globals.default_room_version(),
     };
 
     let content = match &body.creation_content {
@@ -484,7 +484,7 @@ pub async fn upgrade_room_route(
 ) -> Result<upgrade_room::v3::Response> {
     let sender_user = body.sender_user.as_ref().expect("user is authenticated");
 
-    if !matches!(body.new_version, RoomVersionId::V5 | RoomVersionId::V6) {
+    if !db.rooms.is_supported_version(&db, &body.new_version) {
         return Err(Error::BadRequest(
             ErrorKind::UnsupportedRoomVersion,
             "This server does not support that room version.",