push: Add push rule to ignore room server ACLs

According to MSC3786

crates/ruma-common/CHANGELOG.md

@@ -45,6 +45,7 @@ Improvements:
 * Add methods to sanitize messages according to the spec behind the `unstable-sanitize` feature
   * Can also remove rich reply fallbacks
 * Implement `From<Owned*Id>` for `identifiers::matrix_uri::MatrixId`
+* Add unstable default push rule to ignore room server ACLs events (MSC3786)
 
 # 0.9.2
 

crates/ruma-common/Cargo.toml

@@ -49,6 +49,7 @@ unstable-msc3551 = ["unstable-msc1767"]
 unstable-msc3552 = ["unstable-msc3551"]
 unstable-msc3553 = ["unstable-msc3552"]
 unstable-msc3554 = ["unstable-msc1767"]
+unstable-msc3786 = []
 
 [dependencies]
 base64 = "0.13.0"

crates/ruma-common/src/push/predefined.rs

@@ -26,6 +26,8 @@ impl Ruleset {
                 ConditionalPushRule::member_event(),
                 ConditionalPushRule::contains_display_name(),
                 ConditionalPushRule::tombstone(),
+                #[cfg(feature = "unstable-msc3786")]
+                ConditionalPushRule::server_acl(),
                 ConditionalPushRule::roomnotif(),
                 #[cfg(feature = "unstable-msc2677")]
                 ConditionalPushRule::reaction(),
@@ -169,6 +171,23 @@ impl ConditionalPushRule {
             conditions: vec![EventMatch { key: "type".into(), pattern: "m.reaction".into() }],
         }
     }
+
+    /// Matches [room server ACLs].
+    ///
+    /// [room server ACLs]: https://spec.matrix.org/v1.3/client-server-api/#server-access-control-lists-acls-for-rooms
+    #[cfg(feature = "unstable-msc3786")]
+    pub fn server_acl() -> Self {
+        Self {
+            actions: vec![],
+            default: true,
+            enabled: true,
+            rule_id: ".org.matrix.msc3786.rule.room.server_acl".into(),
+            conditions: vec![
+                EventMatch { key: "type".into(), pattern: "m.room.server_acl".into() },
+                EventMatch { key: "state_key".into(), pattern: "".into() },
+            ],
+        }
+    }
 }
 
 /// Default content push rules

crates/ruma/Cargo.toml

@@ -152,6 +152,7 @@ unstable-msc3553 = ["ruma-common/unstable-msc3553"]
 unstable-msc3554 = ["ruma-common/unstable-msc3554"]
 unstable-msc3618 = ["ruma-federation-api?/unstable-msc3618"]
 unstable-msc3723 = ["ruma-federation-api?/unstable-msc3723"]
+unstable-msc3786 = ["ruma-common/unstable-msc3786"]
 
 # Private feature, only used in test / benchmarking code
 __ci = [
@@ -177,6 +178,7 @@ __ci = [
     "unstable-msc3554",
     "unstable-msc3618",
     "unstable-msc3723",
+    "unstable-msc3786",
 ]
 
 [dependencies]