feat(scrapers): total refactor

scrapers/__init__.py

@@ -0,0 +1,56 @@
+from .atcoder import AtCoderScraper
+from .base import BaseScraper, ScraperConfig
+from .codeforces import CodeforcesScraper
+from .cses import CSESScraper
+from .models import (
+    ContestListResult,
+    ContestSummary,
+    MetadataResult,
+    ProblemSummary,
+    TestCase,
+    TestsResult,
+)
+
+ALL_SCRAPERS: dict[str, type[BaseScraper]] = {
+    "atcoder": AtCoderScraper,
+    "codeforces": CodeforcesScraper,
+    "cses": CSESScraper,
+}
+
+_SCRAPER_CLASSES = [
+    "AtCoderScraper",
+    "CodeforcesScraper",
+    "CSESScraper",
+]
+
+_BASE_EXPORTS = [
+    "BaseScraper",
+    "ScraperConfig",
+    "ContestListResult",
+    "ContestSummary",
+    "MetadataResult",
+    "ProblemSummary",
+    "TestCase",
+    "TestsResult",
+]
+
+_REGISTRY_FUNCTIONS = [
+    "get_scraper",
+    "list_platforms",
+    "ALL_SCRAPERS",
+]
+
+__all__ = _BASE_EXPORTS + _SCRAPER_CLASSES + _REGISTRY_FUNCTIONS
+
+
+def get_scraper(platform: str) -> type[BaseScraper]:
+    if platform not in ALL_SCRAPERS:
+        available = ", ".join(ALL_SCRAPERS.keys())
+        raise KeyError(
+            f"Unknown platform '{platform}'. Available platforms: {available}"
+        )
+    return ALL_SCRAPERS[platform]
+
+
+def list_platforms() -> list[str]:
+    return list(ALL_SCRAPERS.keys())