File handling for API.

src/holt59/aoc/2023/day16.py

@@ -84,9 +84,14 @@ class Solver(BaseSolver):
 
         beams = propagate(layout, (0, 0), "R")
 
-        if self.verbose:
-            for row in beams:
-                self.logger.info("".join("#" if col else "." for col in row))
+        if self.files:
+            self.files.create(
+                "beams.txt",
+                "\n".join(
+                    "".join("#" if col else "." for col in row) for row in beams
+                ).encode(),
+                True,
+            )
 
         # part 1
         yield sum(sum(map(bool, row)) for row in beams)