285 lines
9.8 KiB
Go
285 lines
9.8 KiB
Go
// Package service 放业务逻辑。
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//
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// 本包**不认识 *gin.Context**——这样才能不起服务器就写单元测试。
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// handler 负责取参数，service 负责判断和编排，repository 负责读写数据库。
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//
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// 骨架阶段这里只有函数签名和 TODO，实现按工单逐个补。
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package service
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import (
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"database/sql"
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"errors"
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"fmt"
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"strings"
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"time"
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"cmautobuy/admin/model"
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"cmautobuy/admin/repository"
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)
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// ErrNotImplemented 表示该功能还没实现。
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// 补完实现后要把对应的返回删掉，不要留着假装能用。
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var ErrNotImplemented = errors.New("功能尚未实现")
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// ---------- 蝦皮 Excel 导入 ----------
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//
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// ImportResult / ImportShopeeExcel / ParseSpec 的实现见 shopee_import.go，
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// 那个文件还负责上传文件的安全校验（大小、扩展名、内容魔数）。
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// ---------- 采集 ----------
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// CreateCollectTasks 为若干蝦皮商品创建采集任务。
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//
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// 规则：
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// - 按 goods_id **去重**（一个商品有多个 SKU 行，别建重复任务）；
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// - PDD 链接为空的跳过；
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// - collect_status 已是 collecting 的跳过，并在结果里说明跳过了几个；
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// - 建任务成功后把 collect_status 置为 collecting。
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func CreateCollectTasks(db *sql.DB, goodsIDs []string, clientID string) (created, skipped int, err error) {
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// TODO(骨架)
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return 0, 0, ErrNotImplemented
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}
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// ---------- 采购任务 ----------
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// TaskCreateError 说明某一条为什么建不了任务。
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// **不要静默跳过**，要把这些列出来告诉操作员缺什么。
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type TaskCreateError struct {
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SybID string
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Reason string // 例如「该商品未填写 PDD 链接」
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}
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// ---------- 客户端 ----------
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// RegisterClient 登记或更新一台客户端。
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//
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// explicit 的含义见 repository.UpsertClient 的说明：
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// true = 设置页点保存（会更新名称），false = claim 顺带（不更新名称）。
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func RegisterClient(db repository.Execer, c model.Client, explicit bool) error {
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return repository.UpsertClient(db, c, explicit)
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}
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// RegisterClientProfile 处理设置页发起的**显式登记**。
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//
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// `[必须]` 本函数**不读取、不领取、不修改任何任务**，也不返回任务。
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// 这正是它存在的理由：设置页点"保存"不该顺带把一个任务领走——
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// 领走了 Admin 就把任务标成 claimed 了，而保存动作没有义务
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// 去可靠保存那个任务，任务就丢了。
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func RegisterClientProfile(db *sql.DB, clientID string, p ClientProfileRequest) (string, error) {
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if clientID == "" {
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return "", fmt.Errorf("client_id 不能为空")
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}
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if err := p.Validate(); err != nil {
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return "", err
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}
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if err := RegisterClient(db, p.ToClient(clientID), true); err != nil {
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return "", err
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}
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return model.NowISO(), nil
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}
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// TouchClient 刷新 last_seen_at。
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//
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// claim / result / failure **三个接口都要调**。
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// 只在 claim 里调的话，客户端执行长任务期间不调 claim，
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// 会被误判成离线。
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func TouchClient(db *sql.DB, clientID string) error {
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return repository.TouchClient(db, clientID)
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}
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// ClientView 是客户端列表页要显示的一行。
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// Status 是**算出来的**，数据库里没有这个字段。
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type ClientView struct {
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model.Client
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Status string
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PurchaseMode string
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AssignedUserID string
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AssignedUsername string
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}
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// ListClientViews 查客户端列表，并把在线状态算出来。
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func ListClientViews(db *sql.DB, keyword string, threshold time.Duration) ([]ClientView, error) {
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return listClientViews(db, keyword, "", threshold)
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}
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// ListClientViewsForUser 按网页登录身份限制可见范围：管理员全量，采购员只看自己。
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func ListClientViewsForUser(db *sql.DB, actor *model.User, keyword string, threshold time.Duration) ([]ClientView, error) {
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visibleUserID, err := visibleClientUserID(actor)
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if err != nil {
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return nil, err
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}
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return listClientViews(db, keyword, visibleUserID, threshold)
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}
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func visibleClientUserID(actor *model.User) (string, error) {
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if actor == nil {
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return "", ErrUnauthenticated
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}
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visibleUserID := ""
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if !actor.IsAdmin() {
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if actor.Role != model.RolePurchaser {
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return "", ErrAdminRequired
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}
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visibleUserID = actor.UserID
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}
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return visibleUserID, nil
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}
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func listClientViews(db *sql.DB, keyword, visibleUserID string, threshold time.Duration) ([]ClientView, error) {
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clients, err := repository.ListClientsForUser(db, keyword, visibleUserID)
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if err != nil {
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return nil, err
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}
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now := time.Now().UTC()
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views := make([]ClientView, 0, len(clients))
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for _, c := range clients {
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views = append(views, ClientView{
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Client: c.Client,
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Status: c.StatusText(now, threshold),
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PurchaseMode: repository.ParseClientPurchaseMode(c.Capabilities),
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AssignedUserID: c.AssignedUserID,
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AssignedUsername: c.AssignedUsername,
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})
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}
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return views, nil
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}
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// ClientListResult 是客户端页面的一页数据和同一权限范围内的完整统计。
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type ClientListResult struct {
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Rows []ClientView
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Page int
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Total int
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TotalPages int
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Online int
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Offline int
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}
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// ListClientPageForUser 按网页登录身份、搜索词和统一页大小返回客户端列表。
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func ListClientPageForUser(db *sql.DB, actor *model.User, keyword string, threshold time.Duration, requestedPage int) (*ClientListResult, error) {
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visibleUserID, err := visibleClientUserID(actor)
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if err != nil {
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return nil, err
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}
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now := time.Now().UTC()
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page := requestedPage
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if page < 1 {
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page = 1
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}
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rows, total, err := repository.ListClientsForUserPage(db, keyword, visibleUserID, PageSize, (page-1)*PageSize)
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if err != nil {
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return nil, err
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}
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totalPages := TotalPages(total)
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clampedPage := ClampPage(page, totalPages)
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if clampedPage != page {
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page = clampedPage
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rows, _, err = repository.ListClientsForUserPage(db, keyword, visibleUserID, PageSize, (page-1)*PageSize)
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if err != nil {
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return nil, err
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}
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}
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online, err := repository.CountOnlineClientsForUser(
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db, keyword, visibleUserID, now.Add(-threshold).Format(model.TimeLayout))
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if err != nil {
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return nil, err
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}
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views := make([]ClientView, 0, len(rows))
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for _, client := range rows {
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views = append(views, ClientView{
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Client: client.Client,
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Status: client.StatusText(now, threshold),
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PurchaseMode: repository.ParseClientPurchaseMode(client.Capabilities),
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AssignedUserID: client.AssignedUserID, AssignedUsername: client.AssignedUsername,
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})
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}
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return &ClientListResult{
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Rows: views, Page: page, Total: total, TotalPages: totalPages,
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Online: online, Offline: total - online,
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}, nil
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}
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// ListAssignableClients 返回当前用户在采购任务页面可选择的客户端。
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// 当前创建页面尚未实现，本函数固定未来入口也必须沿用相同权限边界。
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func ListAssignableClients(db *sql.DB, actor *model.User, threshold time.Duration) ([]ClientView, error) {
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return ListClientViewsForUser(db, actor, "", threshold)
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}
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// PurchaseClientOptions 是采购弹窗的客户端候选和可选数量。
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// 非 live Client 也返回给页面显示禁用原因；创建时仍会在事务内复核能力。
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type PurchaseClientOptions struct {
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Rows []ClientView
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SelectableCount int
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}
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// ListPurchaseClientOptions 返回当前用户可见的采购客户端。
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// live Client 即使暂时离线也可提前指派，等它上线后再领取任务。
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func ListPurchaseClientOptions(db *sql.DB, actor *model.User, threshold time.Duration) (*PurchaseClientOptions, error) {
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clients, err := ListClientViewsForUser(db, actor, "", threshold)
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if err != nil {
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return nil, err
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}
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result := &PurchaseClientOptions{Rows: clients}
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for _, client := range clients {
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if client.PurchaseMode == string(model.TaskExecutionLive) {
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result.SelectableCount++
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}
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}
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return result, nil
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}
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// ListActivePurchasers 返回管理员可选择的绑定目标。
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func ListActivePurchasers(db *sql.DB, actor *model.User) ([]model.User, error) {
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if actor == nil || !actor.IsAdmin() {
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return nil, ErrAdminRequired
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}
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return repository.ListActivePurchasers(db)
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}
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// AssignClient 由管理员完成首次绑定或转交。
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func AssignClient(db *sql.DB, actor *model.User, clientID, purchaserUserID string, now time.Time) (bool, bool, error) {
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if actor == nil || !actor.IsAdmin() {
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return false, false, ErrAdminRequired
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}
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clientID = strings.TrimSpace(clientID)
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purchaserUserID = strings.TrimSpace(purchaserUserID)
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if clientID == "" || purchaserUserID == "" {
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return false, false, invalidInput("客户端和采购员都不能为空")
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}
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id, err := randomID("CA-", 16)
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if err != nil {
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return false, false, err
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}
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at := now.UTC().Format(model.TimeLayout)
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return repository.AssignClient(db, model.ClientUserAssignment{
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AssignmentID: id, ClientID: clientID, UserID: purchaserUserID,
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StartedAt: at, AssignedByUserID: actor.UserID,
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})
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}
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// UnassignClient 由管理员结束当前归属，不改动任何任务。
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func UnassignClient(db *sql.DB, actor *model.User, clientID string, now time.Time) error {
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if actor == nil || !actor.IsAdmin() {
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return ErrAdminRequired
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}
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clientID = strings.TrimSpace(clientID)
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if clientID == "" {
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return invalidInput("客户端不能为空")
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}
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return repository.UnassignClient(db, clientID, actor.UserID, now.UTC().Format(model.TimeLayout))
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}
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// DeleteClients 批量删除，返回实际删除条数。
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func DeleteClients(db *sql.DB, clientIDs []string) (int64, error) {
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return repository.DeleteClients(db, clientIDs)
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}
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// ---------- 领取任务 ----------
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// ClaimNextTask 为客户端领取一个任务，没有可领的返回 (nil, nil)。
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//
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// 调用方拿到 nil 要返回 204 No Content，**不是 200 加空对象**。
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func ClaimNextTask(db *sql.DB, clientID string, supportedTypes []string, purchaseModes ...string) (*model.Task, error) {
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return repository.ClaimNextTask(db, clientID, supportedTypes, purchaseModes...)
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}
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