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fix(kattis): add precision, open URLs, and surface submit errors

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Problem: `_stream_single_problem` never extracted float precision, so
epsilon problems got no tolerance. `scrape_contest_metadata` omitted
`contest_url` and `standings_url`, breaking `:CP open contest/standings`.
Submit always returned success even when Kattis responded with an error
like "You need to join the contest".

Solution: call `extract_precision` on problem HTML and emit it in the
JSON payload. Set `contest_url` and `standings_url` on both metadata
paths (contest and single-slug). After submit, check for `Submission ID:`
in the response and return the error text if absent.
This commit is contained in:
Barrett Ruth 2026-03-06 15:20:30 -05:00
parent c4be8b4f9e
commit 8485955baa
1 changed files with 10 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

13
scrapers/kattis.py
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@ -10,7 +10,7 @@ from pathlib import Path
import httpx import httpx
from .base import BaseScraper from .base import BaseScraper, extract_precision
from .timeouts import HTTP_TIMEOUT from .timeouts import HTTP_TIMEOUT
from .models import ( from .models import (
ContestListResult, ContestListResult,
@ -173,6 +173,7 @@ async def _stream_single_problem(client: httpx.AsyncClient, slug: str) -> None:
timeout_ms, memory_mb = _parse_limits(html) timeout_ms, memory_mb = _parse_limits(html)
interactive = _is_interactive(html) interactive = _is_interactive(html)
precision = extract_precision(html)
tests: list[TestCase] = [] tests: list[TestCase] = []
try: try:
@ -200,6 +201,7 @@ async def _stream_single_problem(client: httpx.AsyncClient, slug: str) -> None:
"memory_mb": memory_mb, "memory_mb": memory_mb,
"interactive": interactive, "interactive": interactive,
"multi_test": False, "multi_test": False,
"precision": precision,
} }
), ),
flush=True, flush=True,
@ -254,6 +256,8 @@ class KattisScraper(BaseScraper):
ProblemSummary(id=slug, name=name) for slug, name in slugs ProblemSummary(id=slug, name=name) for slug, name in slugs
], ],
url=f"{BASE_URL}/problems/%s", url=f"{BASE_URL}/problems/%s",
contest_url=f"{BASE_URL}/contests/{contest_id}",
standings_url=f"{BASE_URL}/contests/{contest_id}/standings",
) )
try: try:
html = await _fetch_text( html = await _fetch_text(
@ -273,6 +277,8 @@ class KattisScraper(BaseScraper):
contest_id=contest_id, contest_id=contest_id,
problems=[ProblemSummary(id=contest_id, name=name)], problems=[ProblemSummary(id=contest_id, name=name)],
url=f"{BASE_URL}/problems/%s", url=f"{BASE_URL}/problems/%s",
contest_url=f"{BASE_URL}/problems/{contest_id}",
standings_url="",
) )
except Exception as e: except Exception as e:
return self._metadata_error(str(e)) return self._metadata_error(str(e))
@ -373,9 +379,10 @@ class KattisScraper(BaseScraper):
return self._submit_error(f"Submit request failed: {e}") return self._submit_error(f"Submit request failed: {e}")
sid_m = re.search(r"Submission ID:\s*(\d+)", r.text, re.IGNORECASE) sid_m = re.search(r"Submission ID:\s*(\d+)", r.text, re.IGNORECASE)
sid = sid_m.group(1) if sid_m else "" if not sid_m:
return self._submit_error(r.text.strip() or "Submit failed (no submission ID)")
return SubmitResult( return SubmitResult(
success=True, error="", submission_id=sid, verdict="submitted" success=True, error="", submission_id=sid_m.group(1), verdict="submitted"
) )
async def login(self, credentials: dict[str, str]) -> LoginResult: async def login(self, credentials: dict[str, str]) -> LoginResult: