Adds Task 1.6: a backward-cursor paginator in base.py, a message-type
normalizer in parsers.py, and the WeChat chat-message scraper in wechat.py.
- app/scraper/parsers.py: normalize_wechat_type() maps 1 -> "text",
-2 -> "divider", everything else -> "unknown". Total (never raises);
unknown codes pass through so no real message is silently dropped.
- app/scraper/base.py: paginate_by_cursor() generic async generator. Takes
a fetch(cursor) -> (rows, next_cursor, has_more) coroutine; advances the
cursor and stops on has_more=False OR an empty page (defensive). Same
RateLimiter integration as paginate_by_page.
- app/scraper/wechat.py: scrape_wechat_messages() wraps
POST /wechatweb/msg/chats. Body is form-encoded (NOT JSON) — content-type
is overridden per request to application/x-www-form-urlencoded via the
YunkeClient.post(headers=...) override hook. Pages backward by setting
end = data.end - 1 each batch, repeats until hasLast=false. Drops any
record whose type/messageType is -2 (date divider UI chrome). Yields
normalized dicts (snake_case Message columns + channel="wechat" +
raw_json); the raw type code is preserved on raw_json for the
persistence layer (Task 1.7).
Tests: 13 new (10 parser parametrized + 3 scraper). respx-mocked
msg/chats with two backward pages — asserts [m1, m2, m3] yielded (the -2
divider dropped), full field mapping vs the live-capture names, the
content-type is form-encoded (not JSON), and the 2nd request body's
end == E1 - 1 (proving the backward cursor advance).
Co-Authored-By: Claude <noreply@anthropic.com>
Add the first list scraper for the yunke data-mirror system, establishing
the reusable pagination pattern all later list scrapers will build on.
- app/scraper/base.py: generic `paginate_by_page` async generator that walks
page-numbered endpoints until a page comes back empty (the yunke CRM's
primary "no more rows" signal), with a defensive over-fetch ceiling keyed
off the declared total (strict `>` so an honest source yields exactly
`total`). Plus a tiny `RateLimiter` enforcing a min interval between calls.
- app/scraper/wechat.py: `scrape_wechat_friends` wraps
`POST /wechatweb/wxFriends/friend_list/es`, maps each record to the
`Customer` column shape (snake_case) with `channel="wechat"` and a verbatim
`raw_json` copy. Optional `department_id`/`user_id` filters pass through to
the request body.
- tests/cassettes/wxFriends_fixture.py: two realistic, capture-shaped friend
records + a response-envelope builder, reused by the scraper tests.
- tests/test_scrape_wechat_friends.py: drives the real pagination +
normalization logic through respx (page1 returns both records, page2 empty
-> stop). Asserts exact field mappings, `raw_json` fidelity, and exactly 2
upstream calls.
- tests/test_scrape_base.py: smoke tests for the RateLimiter spacing.
Persistence (upsert into `Customer`) is deliberately deferred to Task 1.7;
scrapers remain pure producers of normalized dicts.
Co-Authored-By: Claude <noreply@anthropic.com>
浅念