tamakyi
30c502ce7b
备份（.rondbackup）与迷雾（.fwss）各加一层「先看差异再动手」： - 迷雾：上传先出差异页，说清叠加能补多少、整体替换会丢多少，并在真实底图上 用绿/灰/红标出会新增 / 不变 / 会丢的区域 - 备份：与当前数据集按 UUID 逐条比对（rond 每次导出都会重排 Z_PK，编号认不出人）， 新增合入、冲突逐条选、仅站内有逐条勾选删除，全在一个事务里执行； 合入的行写回 entity_raw，保证再传同一份备份时差异归零 - 地点按坐标对齐：站点的「补全地址」会把地点改名，拿名称当键会让一整个地点的 到访全变成假冲突 - 附属数据（备注/结论/访客票/图片）从 dataset_id+src_pk 换成坐标键，换数据集不再失联； 访客票没有 dataset_id，回填按活跃数据集认领 - 修正 contentHash 拿 Z_PK 当指纹的隐患，以及两处「src_pk 跨快照稳定」的错误注释 导出格式（.rondbackup / .fwss）保持原样，往返测试通过。
209 lines
7.4 KiB
Go
209 lines
7.4 KiB
Go
// Package votes 存放地点的「推荐 / 踩雷」两类表态：
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// - place_votes 站长对地点的官方结论（单值）
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// - place_visitor_votes 访客点赞 / 点踩（一人一票，可改可撤）
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//
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// 站长的「官方结论」按**坐标键**（place_key）存储：src_pk 只在单个数据集内有效，
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// 换个数据集同编号就是另一个地点，结论会挂错人。
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// 访客票仍按 src_pk 存——那张表没有 dataset_id，无从判断票是投给哪个数据集的，
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// 迁移有歧义，留待单独处理。
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package votes
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import (
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"context"
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"database/sql"
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"fmt"
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)
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// placeKeyExpr 把 places p 这一行的坐标换算成 place_key。
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// **必须与 Go 侧的 rond.PlaceCoordKey 以及 notes 包里的同款表达式逐位一致**：
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// fmt.Sprintf("%.6f|%.6f") ↔ to_char(x,'FM999990.000000')||'|'||to_char(y,'FM999990.000000')
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const placeKeyExpr = `to_char(p.lat,'FM999990.000000')||'|'||to_char(p.lon,'FM999990.000000')`
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// VerdictRecommend / VerdictAvoid 是官方结论的取值。
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const (
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VerdictAvoid = -1
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VerdictRecommend = 1
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)
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type Store struct{ DB *sql.DB }
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// Tally 是一个地点的访客票数汇总。
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type Tally struct {
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Up int `json:"up"`
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Down int `json:"down"`
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}
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// Verdicts 返回某个数据集的站长结论：该数据集里的 src_pk -> verdict(1/-1)。
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func (s *Store) Verdicts(ctx context.Context, datasetID int64) (map[int]int, error) {
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out := map[int]int{}
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rows, err := s.DB.QueryContext(ctx, `
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SELECT p.src_pk, v.verdict FROM places p
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JOIN place_votes v ON v.place_key = `+placeKeyExpr+`
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WHERE p.dataset_id=$1 AND p.lat IS NOT NULL AND p.lon IS NOT NULL`, datasetID)
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if err != nil {
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return out, err
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}
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defer rows.Close()
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for rows.Next() {
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var pk, v int
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if err := rows.Scan(&pk, &v); err != nil {
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return out, err
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}
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out[pk] = v
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}
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return out, rows.Err()
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}
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// Verdict 取单个地点的站长结论；未标注返回 0。
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func (s *Store) Verdict(ctx context.Context, datasetID int64, srcPK int) (int, error) {
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var v int
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err := s.DB.QueryRowContext(ctx, `SELECT v.verdict FROM place_votes v
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JOIN places p ON v.place_key = `+placeKeyExpr+`
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WHERE p.dataset_id=$1 AND p.src_pk=$2`, datasetID, srcPK).Scan(&v)
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if err == sql.ErrNoRows {
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return 0, nil
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}
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return v, err
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}
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// SaveVerdict 设置站长结论；verdict 为 0 表示取消结论。
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func (s *Store) SaveVerdict(ctx context.Context, userID, datasetID int64, srcPK, verdict int) error {
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if verdict == 0 {
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_, err := s.DB.ExecContext(ctx, `DELETE FROM place_votes v USING places p
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WHERE v.user_id=$1 AND p.dataset_id=$2 AND p.src_pk=$3
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AND v.place_key = `+placeKeyExpr, userID, datasetID, srcPK)
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return err
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}
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// 先按坐标键算出这条地点该挂在哪，找不到该地点就什么也不写
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_, err := s.DB.ExecContext(ctx, `INSERT INTO place_votes
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(user_id, place_key, dataset_id, src_pk, verdict, updated_at)
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SELECT $1, `+placeKeyExpr+`, $2, $3, $4, now()
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FROM places p
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WHERE p.dataset_id=$2 AND p.src_pk=$3 AND p.lat IS NOT NULL AND p.lon IS NOT NULL
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ON CONFLICT (user_id, place_key) DO UPDATE SET
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verdict=EXCLUDED.verdict, dataset_id=EXCLUDED.dataset_id,
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src_pk=EXCLUDED.src_pk, updated_at=now()`,
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userID, datasetID, srcPK, verdict)
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return err
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}
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// placeKeyOf 把某个数据集里的地点编号换算成坐标键——访客票也是挂在坐标上的，
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// 换数据集之后票仍然跟着同一个地点。
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func (s *Store) placeKeyOf(ctx context.Context, datasetID int64, srcPK int) (string, error) {
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var key string
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err := s.DB.QueryRowContext(ctx, `SELECT `+placeKeyExpr+` FROM places p
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WHERE p.dataset_id=$1 AND p.src_pk=$2 AND p.lat IS NOT NULL AND p.lon IS NOT NULL`,
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datasetID, srcPK).Scan(&key)
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if err == sql.ErrNoRows {
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return "", fmt.Errorf("地点不存在或没有坐标")
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}
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return key, err
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}
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// Tallies 返回某个数据集里各地点的访客票数：src_pk -> Tally。
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// 票表规模很小（个人站点），一次读全更省事，也避免给 pgx 传数组参数带来的类型歧义。
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func (s *Store) Tallies(ctx context.Context, datasetID int64) (map[int]Tally, error) {
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out := map[int]Tally{}
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rows, err := s.DB.QueryContext(ctx, `SELECT p.src_pk,
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count(*) FILTER (WHERE vv.vote=1), count(*) FILTER (WHERE vv.vote=-1)
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FROM places p JOIN place_visitor_votes vv ON vv.place_key = `+placeKeyExpr+`
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WHERE p.dataset_id=$1 AND p.lat IS NOT NULL AND p.lon IS NOT NULL
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GROUP BY p.src_pk`, datasetID)
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if err != nil {
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return out, err
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}
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defer rows.Close()
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for rows.Next() {
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var pk int
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var t Tally
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if err := rows.Scan(&pk, &t.Up, &t.Down); err != nil {
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return out, err
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}
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out[pk] = t
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}
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return out, rows.Err()
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}
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// Tally 取单个地点的访客票数。
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func (s *Store) Tally(ctx context.Context, datasetID int64, srcPK int) (Tally, error) {
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var t Tally
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err := s.DB.QueryRowContext(ctx, `SELECT
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count(*) FILTER (WHERE vv.vote=1), count(*) FILTER (WHERE vv.vote=-1)
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FROM place_visitor_votes vv JOIN places p ON vv.place_key = `+placeKeyExpr+`
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WHERE p.dataset_id=$1 AND p.src_pk=$2`, datasetID, srcPK).Scan(&t.Up, &t.Down)
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return t, err
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}
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// VoterAll 返回该访客投过的全部票：src_pk -> vote，供地图一次性标注「我投的」。
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func (s *Store) VoterAll(ctx context.Context, datasetID int64, voterKey string) (map[int]int, error) {
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out := map[int]int{}
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if voterKey == "" {
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return out, nil
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}
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rows, err := s.DB.QueryContext(ctx, `SELECT p.src_pk, vv.vote
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FROM place_visitor_votes vv JOIN places p ON vv.place_key = `+placeKeyExpr+`
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WHERE p.dataset_id=$1 AND vv.voter_key=$2`, datasetID, voterKey)
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if err != nil {
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return out, err
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}
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defer rows.Close()
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for rows.Next() {
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var pk, v int
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if err := rows.Scan(&pk, &v); err != nil {
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return out, err
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}
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out[pk] = v
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}
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return out, rows.Err()
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}
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// Voter 返回该访客对某地点的既有投票（1/-1/0）。voterKey 为空表示拿不到身份。
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func (s *Store) Voter(ctx context.Context, datasetID int64, srcPK int, voterKey string) int {
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if voterKey == "" {
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return 0
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}
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var v int
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if err := s.DB.QueryRowContext(ctx, `SELECT vv.vote FROM place_visitor_votes vv
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JOIN places p ON vv.place_key = `+placeKeyExpr+`
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WHERE p.dataset_id=$1 AND p.src_pk=$2 AND vv.voter_key=$3`,
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datasetID, srcPK, voterKey).Scan(&v); err != nil {
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return 0
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}
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return v
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}
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// Cast 记录访客投票：未投过则新增；投同一票则撤销（再点一次取消）；投另一票则改为该票。
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// 返回更新后的票数与该访客最终的选择。
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func (s *Store) Cast(ctx context.Context, datasetID int64, srcPK int, voterKey string, vote int) (Tally, int, error) {
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key, err := s.placeKeyOf(ctx, datasetID, srcPK)
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if err != nil {
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return Tally{}, 0, err
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}
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var cur int
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err = s.DB.QueryRowContext(ctx,
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`SELECT vote FROM place_visitor_votes WHERE place_key=$1 AND voter_key=$2`, key, voterKey).Scan(&cur)
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switch {
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case err == sql.ErrNoRows:
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_, err = s.DB.ExecContext(ctx,
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`INSERT INTO place_visitor_votes (place_key, voter_key, vote, src_pk) VALUES ($1,$2,$3,$4)`,
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key, voterKey, vote, srcPK)
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cur = vote
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case err != nil:
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return Tally{}, 0, err
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case cur == vote:
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_, err = s.DB.ExecContext(ctx,
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`DELETE FROM place_visitor_votes WHERE place_key=$1 AND voter_key=$2`, key, voterKey)
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cur = 0
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default:
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_, err = s.DB.ExecContext(ctx,
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`UPDATE place_visitor_votes SET vote=$3, src_pk=$4, updated_at=now()
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WHERE place_key=$1 AND voter_key=$2`, key, voterKey, vote, srcPK)
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cur = vote
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}
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if err != nil {
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return Tally{}, 0, err
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}
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t, err := s.Tally(ctx, datasetID, srcPK)
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return t, cur, err
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}
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