f03df51561
Add structured parsing for transfer messages so they no longer fall through to the generic `[链接/文件]` fallback in chat history exports. Mirrors the dispatch + helper pattern PR #65 (merged-forward type=19) established for `base_type=49` appmsg sub-types. ## What is added **Helpers (mcp_server.py):** - `_TRANSFER_PAYSUBTYPE_LABEL` — maps the 6 community-consensus paysubtypes (1 发起 / 3 已收款 / 4 已退还 / 5 过期已退还 / 7 待领取 / 8 已领取); unknown values degrade to `未知(paysubtype=N)` so a new variant in a future WeChat build is visible rather than silently dropped. - `_extract_transfer_info(appmsg)` — pulls fields out of `<wcpayinfo>`, with snake/camelCase fallback (`feedesc`/`feeDesc`, `pay_memo`/`paymemo`) observed across WeChat versions. - `_format_transfer_message_text(appmsg, title)` — one-line render for chat history: `[转账·已收款] ¥100.00 备注: lunch`. **Dispatch (mcp_server.py):** - `_format_app_message_text` gains an `app_type == 2000` branch that routes to `_format_transfer_message_text`. `get_chat_history`, `export_chat`, `export_all_chats` and `monitor_web` all inherit automatically. **New MCP tool (mcp_server.py):** - `decode_transfer(chat_name, local_id, create_time=0)` — full structured view: direction, amount, memo, payer/receiver wxid, transfer id, transcation id, begin/invalid timestamps. Uses the same multi-shard scan + ambiguity-by-create_time pattern as `decode_file_message` / `decode_record_item`. **CLI wrapper:** - `decode_transfer.py` at the repo root — argparse wrapper that prints the same text as the MCP tool, returning non-zero exit when the message can't be decoded (script-friendly). **JSON export (chat_export_helpers.py + export_chat.py + export_all_chats.py):** - `_extract_content` now returns `(rendered, extras)`. `extras` carries structured fields when a message type has more signal than the human-readable string (currently: transfers → `type:"transfer" + transfer:{direction, fee_desc, pay_memo, ...}`). The channel is forward-compatible — future additions (video号 metadata, expanded merged-forward, etc.) flow through the same shape without changing the caller signature. JSON consumers that only read `content` are unaffected; the change is additive. **monitor_web (monitor_web.py):** - Backend dispatch branch + orange-yellow `.msg-transfer` card CSS + `renderRich` JS handler. ## Tests 12 new cases in `tests/test_record_decoders.py`: - `TransferPaysubTypeLabelTests` — locks the 6-value label table. - `ExtractTransferInfoTests` (6 cases) — full field round-trip, missing `<wcpayinfo>` fallback, snake/camelCase variants, unknown paysubtype degradation, empty paysubtype handling. - `FormatTransferMessageTextTests` (4 cases) — initiate / received-with-memo / missing-wcpayinfo / missing-fee-desc. - `AppMessageDispatchTransferTests` — `_format_app_message_text` routes type=2000 correctly so `get_chat_history` / `export_chat` both pick it up. All fixtures use synthetic placeholder values (`wxid_payer_synth`, `¥100.00`, `1` + 27×`0`); no real PII or transaction IDs. ## Scope 7 files, +546 / -15 (additions only — no behavior change for existing message types). All 180 tests pass locally (168 baseline + 12 new).
52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
"""
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读取微信转账消息（appmsg type=2000）的结构化字段。
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用法:
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python3 decode_transfer.py <chat_name> <local_id> [<ts>]
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参数:
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<chat_name> 联系人显示名、备注名或 wxid（仅 1v1 聊天有转账消息）。
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<local_id> 转账消息的 local_id（从 export_chat 输出 / monitor_web 等地方获取）。
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[<ts>] 可选 unix 时间戳。当 local_id 在多个分片冲突时用它唯一定位。
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输出: 多行可读文本，含方向（发起/收款/退还）、金额、备注、付款/收款 wxid、
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交易号、发起/失效时间。
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需先完成 WeChat DB 解密（详见 README）。本 CLI 是 mcp_server.decode_transfer
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工具的命令行包装，输出格式与 MCP 工具一致。
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"""
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import argparse
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import sys
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import mcp_server
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def main() -> int:
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parser = argparse.ArgumentParser(
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prog="python3 decode_transfer.py",
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description="读取微信转账消息的结构化字段",
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)
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parser.add_argument("chat_name", help="联系人名/备注/wxid")
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parser.add_argument("local_id", type=int, help="转账消息的 local_id")
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parser.add_argument(
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"ts",
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nargs="?",
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type=int,
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default=0,
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help="消息的 unix 时间戳（跨分片唯一定位时需要，可省略）",
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)
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args = parser.parse_args()
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result = mcp_server.decode_transfer(args.chat_name, args.local_id, args.ts)
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print(result)
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# 如果工具返回错误文案，退出码非 0 便于 shell 脚本判断
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if result.startswith(("错误:", "找不到", "不是转账消息", "无法解析", "消息中没有", "消息 content")):
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return 1
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if "无法唯一定位" in result:
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return 2
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return 0
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if __name__ == "__main__":
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sys.exit(main())
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