Add duration to gaps and expose gaps in moving window

src/frequenz/sdk/timeseries/_moving_window.py

@@ -246,6 +246,15 @@ async def sink_buffer(sample: Sample[Quantity]) -> None:
             asyncio.create_task(self._resampler.resample(), name="resample")
         )
 
+    def gaps(self) -> list[Gap]:
+        """
+        Return a list of gaps in the `MovingWindow`.
+
+        Returns:
+            A list of gaps in the `MovingWindow`.
+        """
+        return self._buffer.gaps()
+
     def __len__(self) -> int:
         """
         Return the size of the `MovingWindow`s underlying buffer.

src/frequenz/sdk/timeseries/_ringbuffer/buffer.py

@@ -44,6 +44,14 @@ def contains(self, timestamp: datetime) -> bool:
 
         return False
 
+    def duration(self) -> timedelta:
+        """Return the length of the gap.
+
+        Returns:
+            Length of the gap.
+        """
+        return self.end - self.start
+
 
 class OrderedRingBuffer(Generic[FloatArray]):
     """Time aware ringbuffer that keeps its entries sorted by time."""
@@ -108,6 +116,15 @@ def gaps(self) -> List[Gap]:
         """
         return self._gaps
 
+    @property
+    def gaps(self) -> List[Gap]:
+        """Return the list of gaps.
+
+        Returns:
+            The list of gaps.
+        """
+        return self._gaps
+
     @property
     def maxlen(self) -> int:
         """Get the max length.