events: Implement {From,Into}Iterator for ReceiptEventContent

crates/ruma-common/src/events/receipt.rs

@@ -5,7 +5,7 @@
 mod receipt_thread_serde;
 
 use std::{
-    collections::BTreeMap,
+    collections::{btree_map, BTreeMap},
     ops::{Deref, DerefMut},
 };
 
@@ -54,6 +54,24 @@ impl DerefMut for ReceiptEventContent {
     }
 }
 
+impl IntoIterator for ReceiptEventContent {
+    type Item = (OwnedEventId, Receipts);
+    type IntoIter = btree_map::IntoIter<OwnedEventId, Receipts>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.0.into_iter()
+    }
+}
+
+impl FromIterator<(OwnedEventId, Receipts)> for ReceiptEventContent {
+    fn from_iter<T>(iter: T) -> Self
+    where
+        T: IntoIterator<Item = (OwnedEventId, Receipts)>,
+    {
+        Self(BTreeMap::from_iter(iter))
+    }
+}
+
 /// A collection of receipts.
 pub type Receipts = BTreeMap<ReceiptType, UserReceipts>;