Refactor code for API (#3)

Co-authored-by: Mikael CAPELLE <mikael.capelle@thalesaleniaspace.com>
Co-authored-by: Mikaël Capelle <capelle.mikael@gmail.com>
Reviewed-on: #3

src/holt59/aoc/2015/day12.py

@@ -1,6 +1,7 @@
 import json
-import sys
-from typing import TypeAlias
+from typing import Any, Iterator, TypeAlias
+
+from ..base import BaseSolver
 
 JsonObject: TypeAlias = dict[str, "JsonObject"] | list["JsonObject"] | int | str
 
@@ -18,10 +19,9 @@ def json_sum(value: JsonObject, ignore: str | None = None) -> int:
         return 0
 
 
-data: JsonObject = json.load(sys.stdin)
+class Solver(BaseSolver):
+    def solve(self, input: str) -> Iterator[Any]:
+        data: JsonObject = json.loads(input)
 
-answer_1 = json_sum(data)
-print(f"answer 1 is {answer_1}")
-
-answer_2 = json_sum(data, "red")
-print(f"answer 2 is {answer_2}")
+        yield json_sum(data)
+        yield json_sum(data, "red")