Create-knowledge-find-decode/acquisition/store.py

"""SQLite 数据层：query 生成结果 + 真实搜索结果，统一进 data/app.db。

为什么不再用散落 json：量大了「一次性 fetch 整个 json」撑不住，要能分页/筛选/多 run 累积。
设计：
  queries        —— 一条生成的 query 一行；各打法字段不同，统一塞进 axes(json) 列
  search_results —— 一条「query × 平台」一行（把 douyin/weixin 嵌套拍平），方便按平台/成功筛
媒体文件仍躺 data/search/，库里只存相对路径（cover/video）。
纯 stdlib sqlite3，无新依赖。写入幂等：同 run 重导先清该 run。
"""
from __future__ import annotations

import json
import sqlite3
from pathlib import Path
from typing import Any, Iterable, Optional

ROOT = Path(__file__).resolve().parent.parent
DB_PATH = ROOT / "data" / "app.db"

_SCHEMA = """
CREATE TABLE IF NOT EXISTS queries (
    id        INTEGER PRIMARY KEY AUTOINCREMENT,
    run_id    TEXT NOT NULL,
    method    TEXT NOT NULL,          -- 打法名（实质 × 创作阶段 × 需求 等）
    query     TEXT NOT NULL,
    axes      TEXT NOT NULL DEFAULT '{}',  -- 该打法的正交轴 json（实质/形式/阶段…）
    created_at INTEGER NOT NULL
);
CREATE INDEX IF NOT EXISTS ix_queries_run    ON queries(run_id);
CREATE INDEX IF NOT EXISTS ix_queries_method ON queries(method);

CREATE TABLE IF NOT EXISTS search_results (
    id        INTEGER PRIMARY KEY AUTOINCREMENT,
    run_id    TEXT NOT NULL,
    method    TEXT NOT NULL,
    query     TEXT NOT NULL,
    platform  TEXT NOT NULL,          -- douyin / weixin
    ok        INTEGER NOT NULL,       -- 1=搜到且有媒体, 0=失败/空
    title     TEXT,
    url       TEXT,
    cover     TEXT,                   -- /data/search/... 相对路径
    video     TEXT,                   -- 抖音才有
    extra     TEXT NOT NULL DEFAULT '{}',  -- nick/error 等附加 json
    created_at INTEGER NOT NULL
);
CREATE INDEX IF NOT EXISTS ix_sr_run      ON search_results(run_id);
CREATE INDEX IF NOT EXISTS ix_sr_platform ON search_results(platform);
CREATE INDEX IF NOT EXISTS ix_sr_method   ON search_results(method);

CREATE TABLE IF NOT EXISTS runs (
    run_id    TEXT PRIMARY KEY,
    kind      TEXT NOT NULL,          -- queries / search
    note      TEXT,
    created_at INTEGER NOT NULL
);

-- 帖子级「创作知识 / 非创作知识」分类（按 url，一帖判一次）。acquisition/classify.py 写入。
CREATE TABLE IF NOT EXISTS post_class (
    url       TEXT PRIMARY KEY,
    is_creation INTEGER,              -- 1=创作知识 / 0=非
    reason    TEXT,
    knowledge TEXT,                   -- 提取出的完整创作知识（创作帖才有）
    points    TEXT,                   -- 结构化知识点 json（按卡片/分段）
    created_at INTEGER NOT NULL
);
"""

# 旧库迁移：post_class 早期没有 knowledge/points 列，补上（已存在则忽略）
_MIGRATIONS = [
    "ALTER TABLE post_class ADD COLUMN knowledge TEXT",
    "ALTER TABLE post_class ADD COLUMN points TEXT",
]


def connect(db_path: Path | str = DB_PATH) -> sqlite3.Connection:
    """打开（必要时建）库，建表，行按 dict 取。busy_timeout 让多进程并发写不报锁。"""
    p = Path(db_path)
    p.parent.mkdir(parents=True, exist_ok=True)
    conn = sqlite3.connect(str(p), timeout=30)
    conn.row_factory = sqlite3.Row
    conn.execute("PRAGMA busy_timeout=30000")   # 撞锁等 30s 而非报错（与微信补下载并发安全）
    conn.executescript(_SCHEMA)
    for sql in _MIGRATIONS:
        try:
            conn.execute(sql)
        except sqlite3.OperationalError:
            pass                                 # 列已存在
    return conn


def _now(ts: Optional[int]) -> int:
    # 调用方传入时间戳（脚本侧用 int(time.time())）；缺省 0，避免本模块碰 Date/random。
    return int(ts) if ts is not None else 0


def _record_run(conn: sqlite3.Connection, run_id: str, kind: str, note: str, ts: int) -> None:
    conn.execute(
        "INSERT OR REPLACE INTO runs(run_id, kind, note, created_at) VALUES(?,?,?,?)",
        (run_id, kind, note, ts),
    )


# ---- 写入 ----------------------------------------------------------------

# 哪些键是「轴」（除 query 外的结构化字段），存进 axes blob
_NON_AXIS = {"query"}


def insert_queries(conn: sqlite3.Connection, run_id: str, method: str,
                   items: Iterable[dict], *, ts: Optional[int] = None) -> int:
    """写一批生成的 query。items=[{query, <各轴>...}]。同 (run_id,method) 先清后写（幂等）。"""
    t = _now(ts)
    conn.execute("DELETE FROM queries WHERE run_id=? AND method=?", (run_id, method))
    rows = []
    for it in items:
        q = (it or {}).get("query")
        if not q:
            continue
        axes = {k: v for k, v in it.items() if k not in _NON_AXIS}
        rows.append((run_id, method, q, json.dumps(axes, ensure_ascii=False), t))
    conn.executemany(
        "INSERT INTO queries(run_id, method, query, axes, created_at) VALUES(?,?,?,?,?)", rows)
    _record_run(conn, run_id, "queries", method, t)
    conn.commit()
    return len(rows)


def _flatten_search(rec: dict) -> list[dict]:
    """把一条 {method, query, douyin/weixin/xiaohongshu:{ok:[...],error}} 拍成「每个结果一行」。
    某渠道有结果 → 每个结果一行 ok=1；空/失败 → 一行 ok=0 记 error（保留「搜过但无结果」状态）。
    只处理记录里实际出现的渠道（向后兼容只有抖音/微信的旧记录）。"""
    out = []
    method, query = rec.get("method", ""), rec.get("query", "")
    for platform in ("douyin", "weixin", "xiaohongshu"):
        if platform not in rec:
            continue
        v = rec.get(platform) or {}
        hits = v.get("ok") or []
        if hits:
            for h in hits:
                extra = {k: h[k] for k in ("nick", "images", "body_text") if k in h}
                out.append({"platform": platform, "ok": 1, "title": h.get("title"),
                            "url": h.get("url"), "cover": h.get("cover"),
                            "video": h.get("video"), "extra": extra})
        else:
            out.append({"platform": platform, "ok": 0, "extra": {"error": v.get("error") or "未搜到"}})
    return [{**r, "method": method, "query": query} for r in out]


def insert_search_results(conn: sqlite3.Connection, run_id: str,
                          records: Iterable[dict], *, ts: Optional[int] = None) -> int:
    """写一批真实搜索结果。records 为 run_search.py 产出的嵌套结构，按平台拍平入库。"""
    t = _now(ts)
    conn.execute("DELETE FROM search_results WHERE run_id=?", (run_id,))
    rows = []
    for rec in records:
        for r in _flatten_search(rec):
            rows.append((run_id, r["method"], r["query"], r["platform"], r["ok"],
                         r.get("title"), r.get("url"), r.get("cover"), r.get("video"),
                         json.dumps(r.get("extra", {}), ensure_ascii=False), t))
    conn.executemany(
        "INSERT INTO search_results(run_id, method, query, platform, ok, title, url, "
        "cover, video, extra, created_at) VALUES(?,?,?,?,?,?,?,?,?,?,?)", rows)
    _record_run(conn, run_id, "search", f"{len(rows)} rows", t)
    conn.commit()
    return len(rows)


# ---- 读取（分页 + 筛选）---------------------------------------------------

def _page(conn: sqlite3.Connection, base: str, where: list[str], params: list[Any],
          page: int, size: int) -> dict:
    """通用分页：返回 {total, page, size, items}。"""
    size = max(1, min(int(size), 200))
    page = max(1, int(page))
    clause = (" WHERE " + " AND ".join(where)) if where else ""
    total = conn.execute(f"SELECT COUNT(*) FROM ({base}{clause})", params).fetchone()[0]
    rows = conn.execute(f"{base}{clause} ORDER BY id LIMIT ? OFFSET ?",
                        params + [size, (page - 1) * size]).fetchall()
    return {"total": total, "page": page, "size": size, "items": [dict(r) for r in rows]}


def list_queries(conn: sqlite3.Connection, *, method: Optional[str] = None,
                 run_id: Optional[str] = None, page: int = 1, size: int = 30) -> dict:
    where, params = [], []
    if method:
        where.append("method=?"); params.append(method)
    if run_id:
        where.append("run_id=?"); params.append(run_id)
    res = _page(conn, "SELECT * FROM queries", where, params, page, size)
    for it in res["items"]:
        it["axes"] = json.loads(it.get("axes") or "{}")
    return res


def list_search(conn: sqlite3.Connection, *, platform: Optional[str] = None,
                method: Optional[str] = None, ok: Optional[bool] = None,
                run_id: Optional[str] = None, query: Optional[str] = None,
                page: int = 1, size: int = 30) -> dict:
    where, params = [], []
    if platform:
        where.append("platform=?"); params.append(platform)
    if method:
        where.append("method=?"); params.append(method)
    if ok is not None:
        where.append("ok=?"); params.append(1 if ok else 0)
    if run_id:
        where.append("run_id=?"); params.append(run_id)
    if query:
        where.append("query=?"); params.append(query)   # 按 query 文本取该条的全部搜索结果
    res = _page(conn, "SELECT * FROM search_results", where, params, page, size)
    cm = class_map(conn, {it.get("url") for it in res["items"] if it.get("url")})
    for it in res["items"]:
        it["extra"] = json.loads(it.get("extra") or "{}")
        it["cls"] = cm.get(it.get("url"))                # 创作知识分类（无则 None=未分类）
    return res


# ---- 帖子级创作知识分类 ----------------------------------------------------

def get_unclassified_posts(conn: sqlite3.Connection) -> list[dict]:
    """库里有结果、但还没分类的去重帖子（按 url）。带 title/body_text/本地图片，供 classify 用。"""
    rows = conn.execute(
        "SELECT url, platform, title, cover, extra FROM search_results "
        "WHERE ok=1 AND url IS NOT NULL AND url NOT IN (SELECT url FROM post_class) "
        "GROUP BY url"
    ).fetchall()
    out = []
    for r in rows:
        extra = json.loads(r["extra"] or "{}")
        imgs = extra.get("images") or ([r["cover"]] if r["cover"] else [])
        out.append({"url": r["url"], "platform": r["platform"], "title": r["title"] or "",
                    "body_text": extra.get("body_text", ""), "images": imgs})
    return out


def upsert_class(conn: sqlite3.Connection, url: str, is_creation: int, reason: str, ts: int,
                 knowledge: str = "", points: str = "") -> None:
    conn.execute(
        "INSERT OR REPLACE INTO post_class(url, is_creation, reason, knowledge, points, created_at) "
        "VALUES(?,?,?,?,?,?)", (url, is_creation, reason, knowledge, points, ts))
    conn.commit()


def posts_to_classify(conn: sqlite3.Connection, platforms: list[str]) -> list[dict]:
    """指定平台的全部去重帖（ok=1），带 title/body_text/本地图/本地视频，供（重）分类。
    不管是否已分类——上层 upsert 覆盖，便于换更忠实的判法重判。"""
    qs = ",".join("?" * len(platforms))
    rows = conn.execute(
        f"SELECT url, platform, title, cover, video, extra FROM search_results "
        f"WHERE ok=1 AND url IS NOT NULL AND platform IN ({qs}) GROUP BY url", platforms
    ).fetchall()
    out = []
    for r in rows:
        e = json.loads(r["extra"] or "{}")
        imgs = e.get("images") or ([r["cover"]] if r["cover"] else [])
        out.append({"url": r["url"], "platform": r["platform"], "title": r["title"] or "",
                    "body_text": e.get("body_text", ""), "images": imgs, "video": r["video"]})
    return out


def class_map(conn: sqlite3.Connection, urls) -> dict:
    """{url: {is_creation, reason, knowledge, points}}，给取数时挂分类 + 提取的知识点。"""
    urls = [u for u in urls if u]
    if not urls:
        return {}
    qs = ",".join("?" * len(urls))
    rows = conn.execute(
        f"SELECT url, is_creation, reason, knowledge, points FROM post_class WHERE url IN ({qs})", urls
    ).fetchall()
    out = {}
    for r in rows:
        out[r["url"]] = {"is_creation": r["is_creation"], "reason": r["reason"],
                         "knowledge": r["knowledge"] or "",
                         "points": json.loads(r["points"]) if r["points"] else []}
    return out


def class_counts(conn: sqlite3.Connection) -> dict:
    y = conn.execute("SELECT COUNT(*) FROM post_class WHERE is_creation=1").fetchone()[0]
    n = conn.execute("SELECT COUNT(*) FROM post_class WHERE is_creation=0").fetchone()[0]
    return {"creation": y, "non_creation": n}


# ---- 微信正文补下载 --------------------------------------------------------

def weixin_urls_missing_body(conn: sqlite3.Connection) -> list[str]:
    """所有微信帖（distinct url, ok=1）中 extra 还没补正文(body_text)的，供补下载。"""
    rows = conn.execute(
        "SELECT url, extra FROM search_results WHERE platform='weixin' AND ok=1 "
        "AND url IS NOT NULL GROUP BY url"
    ).fetchall()
    return [r["url"] for r in rows if not json.loads(r["extra"] or "{}").get("body_text")]


def update_post_content(conn: sqlite3.Connection, url: str, body_text: str,
                        images: list[str]) -> None:
    """把正文 + 本地图片写回该 url 的所有行的 extra（其余字段保留）。"""
    for r in conn.execute("SELECT id, extra FROM search_results WHERE url=?", (url,)).fetchall():
        e = json.loads(r["extra"] or "{}")
        e["body_text"] = body_text
        if images:
            e["images"] = images
        conn.execute("UPDATE search_results SET extra=? WHERE id=?",
                     (json.dumps(e, ensure_ascii=False), r["id"]))
    conn.commit()


def search_summary(conn: sqlite3.Connection) -> dict:
    """每条 query 搜到几个结果：{query文本: {total, ok}}。给列表页判断按钮显不显示、显几个。"""
    rows = conn.execute(
        "SELECT query, COUNT(*) AS total, SUM(ok) AS ok_n FROM search_results GROUP BY query"
    ).fetchall()
    return {r["query"]: {"total": r["total"], "ok": r["ok_n"] or 0} for r in rows}


def list_runs(conn: sqlite3.Connection) -> list[dict]:
    rows = conn.execute("SELECT * FROM runs ORDER BY created_at DESC, run_id").fetchall()
    return [dict(r) for r in rows]


def list_methods(conn: sqlite3.Connection, table: str = "queries") -> list[str]:
    """某表里有哪些 method（给前端筛选下拉）。"""
    if table not in ("queries", "search_results"):
        raise ValueError(table)
    rows = conn.execute(f"SELECT DISTINCT method FROM {table} ORDER BY method").fetchall()
    return [r[0] for r in rows]