340 lines
11 KiB
Go
340 lines
11 KiB
Go
package sv
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import (
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"context"
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"encoding/json"
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"errors"
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"sort"
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"strings"
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"github.com/LoveLosita/smartflow/backend/shared/respond"
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forumdao "github.com/LoveLosita/smartflow/backend/services/taskclassforum/dao"
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forummodel "github.com/LoveLosita/smartflow/backend/services/taskclassforum/model"
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forumcontracts "github.com/LoveLosita/smartflow/backend/shared/contracts/taskclassforum"
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"gorm.io/gorm"
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)
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// ListPosts 查询计划广场帖子列表。
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//
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// 职责边界：
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// 1. 负责分页、排序、关键词和标签筛选的业务口径；
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// 2. 负责补齐模板摘要、当前用户点赞/导入状态；
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// 3. 不读取原作者当前 TaskClass，列表只基于论坛快照表。
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func (s *Service) ListPosts(ctx context.Context, actorUserID uint64, page int, pageSize int, sortBy string, keyword string, tag string) ([]forumcontracts.ForumPostBrief, forumcontracts.PageResult, error) {
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if err := s.Ready(); err != nil {
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return nil, forumcontracts.PageResult{}, err
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}
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page, pageSize = normalizePage(page, pageSize)
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posts, total, err := s.forumDAO.ListPosts(ctx, forumdao.ListPostsQuery{
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Page: page,
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PageSize: pageSize,
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Sort: sortBy,
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Keyword: keyword,
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Tag: tag,
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})
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if err != nil {
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return nil, forumcontracts.PageResult{}, err
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}
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if len(posts) == 0 {
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return []forumcontracts.ForumPostBrief{}, pageResult(page, pageSize, total), nil
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}
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postIDs := collectPostIDs(posts)
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templates, err := s.forumDAO.FindTemplatesByPostIDs(ctx, postIDs)
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if err != nil {
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return nil, forumcontracts.PageResult{}, err
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}
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itemCounts, err := s.forumDAO.CountTemplateItemsByPostIDs(ctx, postIDs)
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if err != nil {
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return nil, forumcontracts.PageResult{}, err
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}
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liked, imported, err := s.viewerStateSets(ctx, actorUserID, postIDs)
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if err != nil {
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return nil, forumcontracts.PageResult{}, err
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}
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result := make([]forumcontracts.ForumPostBrief, 0, len(posts))
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for _, post := range posts {
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template, ok := templates[post.ID]
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var templatePtr *forummodel.ForumPostTemplate
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if ok {
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templateCopy := template
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templatePtr = &templateCopy
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}
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result = append(result, postBriefFromModel(post, templatePtr, itemCounts[post.ID], viewerState(post.ID, liked, imported)))
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}
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return result, pageResult(page, pageSize, total), nil
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}
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// ListTags 聚合计划广场已发布帖子的标签。
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func (s *Service) ListTags(ctx context.Context, actorUserID uint64, limit int) ([]forumcontracts.ForumTagItem, error) {
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_ = actorUserID
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if err := s.Ready(); err != nil {
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return nil, err
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}
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if limit <= 0 || limit > 50 {
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limit = 20
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}
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rawTags, err := s.forumDAO.ListPublishedTagJSONs(ctx)
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if err != nil {
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return nil, err
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}
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counter := make(map[string]int)
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for _, raw := range rawTags {
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for _, tag := range tagsFromJSON(raw) {
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if strings.TrimSpace(tag) == "" {
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continue
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}
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counter[tag]++
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}
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}
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items := make([]forumcontracts.ForumTagItem, 0, len(counter))
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for tag, count := range counter {
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items = append(items, forumcontracts.ForumTagItem{Tag: tag, PostCount: count})
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}
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sort.SliceStable(items, func(i, j int) bool {
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if items[i].PostCount == items[j].PostCount {
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return items[i].Tag < items[j].Tag
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}
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return items[i].PostCount > items[j].PostCount
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})
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if len(items) > limit {
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items = items[:limit]
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}
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return items, nil
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}
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// CreatePost 发布计划，并把旧 TaskClass 复制为论坛快照。
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//
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// 职责边界：
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// 1. 通过 TaskClassSnapshotPort 获取当前用户自己的 TaskClass 快照；
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// 2. 在论坛私有表写帖子、模板和模板条目；
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// 3. 不修改旧 TaskClass，也不写 schedule。
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func (s *Service) CreatePost(ctx context.Context, req forumcontracts.CreateForumPostRequest) (*forumcontracts.ForumPostBrief, error) {
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if err := s.Ready(); err != nil {
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return nil, err
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}
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if req.ActorUserID == 0 || req.TaskClassID == 0 || strings.TrimSpace(req.Title) == "" {
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return nil, respond.MissingParam
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}
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if err := validateRuneMax(req.Title, maxPostTitleLen); err != nil {
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return nil, err
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}
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if err := validateRuneMax(req.Summary, maxSummaryLen); err != nil {
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return nil, err
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}
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if s.taskClassPort == nil {
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return nil, ErrTaskClassPortMissing
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}
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idempotencyKey := strings.TrimSpace(req.IdempotencyKey)
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if idempotencyKey != "" {
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existing, err := s.forumDAO.FindPostByIdempotencyKey(ctx, req.ActorUserID, idempotencyKey)
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if err != nil {
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return nil, err
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}
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if existing != nil {
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return s.postBriefByID(ctx, req.ActorUserID, existing.ID)
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}
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}
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tags, err := normalizeTags(req.Tags)
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if err != nil {
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return nil, err
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}
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tagsJSON, err := tagsToJSON(tags)
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if err != nil {
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return nil, err
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}
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snapshot, err := s.taskClassPort.GetOwnedTaskClassSnapshot(ctx, req.ActorUserID, req.TaskClassID)
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if err != nil {
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return nil, normalizeRecordNotFound(err, respond.UserTaskClassNotFound)
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}
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if snapshot == nil {
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return nil, respond.UserTaskClassNotFound
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}
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post, template, items, err := buildPostSnapshotModels(req, idempotencyKey, tagsJSON, *snapshot)
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if err != nil {
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return nil, err
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}
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if err := s.forumDAO.CreatePostSnapshot(ctx, &post, &template, items); err != nil {
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return nil, err
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}
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return s.postBriefByID(ctx, req.ActorUserID, post.ID)
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}
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// GetPost 查询帖子详情和模板快照。
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func (s *Service) GetPost(ctx context.Context, actorUserID uint64, postID uint64) (*forumcontracts.ForumPostDetail, error) {
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if err := s.Ready(); err != nil {
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return nil, err
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}
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if postID == 0 {
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return nil, respond.MissingParam
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}
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post, template, items, err := s.loadPostTemplate(ctx, postID)
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if err != nil {
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return nil, err
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}
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liked, imported, err := s.viewerStateSets(ctx, actorUserID, []uint64{postID})
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if err != nil {
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return nil, err
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}
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state := viewerState(postID, liked, imported)
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return &forumcontracts.ForumPostDetail{
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Post: postBriefFromModel(*post, template, len(items), state),
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Template: templateDetailFromModel(*template, items),
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}, nil
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}
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func (s *Service) postBriefByID(ctx context.Context, actorUserID uint64, postID uint64) (*forumcontracts.ForumPostBrief, error) {
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post, template, items, err := s.loadPostTemplate(ctx, postID)
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if err != nil {
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return nil, err
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}
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liked, imported, err := s.viewerStateSets(ctx, actorUserID, []uint64{postID})
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if err != nil {
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return nil, err
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}
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brief := postBriefFromModel(*post, template, len(items), viewerState(postID, liked, imported))
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return &brief, nil
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}
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func (s *Service) loadPostTemplate(ctx context.Context, postID uint64) (*forummodel.ForumPost, *forummodel.ForumPostTemplate, []forummodel.ForumPostTemplateItem, error) {
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post, err := s.forumDAO.FindPublishedPost(ctx, postID)
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if err != nil {
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return nil, nil, nil, normalizeRecordNotFound(err, respond.UserTaskClassNotFound)
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}
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template, err := s.forumDAO.FindTemplateByPostID(ctx, postID)
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if err != nil {
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return nil, nil, nil, normalizeRecordNotFound(err, respond.UserTaskClassNotFound)
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}
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items, err := s.forumDAO.ListTemplateItemsByPostID(ctx, postID)
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if err != nil {
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return nil, nil, nil, err
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}
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return post, template, items, nil
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}
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func (s *Service) viewerStateSets(ctx context.Context, actorUserID uint64, postIDs []uint64) (map[uint64]bool, map[uint64]bool, error) {
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if actorUserID == 0 || len(postIDs) == 0 {
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return map[uint64]bool{}, map[uint64]bool{}, nil
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}
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liked, err := s.forumDAO.LikedPostIDSet(ctx, actorUserID, postIDs)
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if err != nil {
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return nil, nil, err
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}
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imported, err := s.forumDAO.ImportedPostIDSet(ctx, actorUserID, postIDs)
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if err != nil {
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return nil, nil, err
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}
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return liked, imported, nil
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}
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func collectPostIDs(posts []forummodel.ForumPost) []uint64 {
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result := make([]uint64, 0, len(posts))
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for _, post := range posts {
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result = append(result, post.ID)
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}
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return result
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}
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func buildPostSnapshotModels(req forumcontracts.CreateForumPostRequest, idempotencyKey string, tagsJSON string, snapshot TaskClassSnapshot) (forummodel.ForumPost, forummodel.ForumPostTemplate, []forummodel.ForumPostTemplateItem, error) {
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configJSON, err := configSnapshotJSON(snapshot)
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if err != nil {
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return forummodel.ForumPost{}, forummodel.ForumPostTemplate{}, nil, err
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}
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excludedSlotsJSON, err := intSliceToJSONPtr(snapshot.ExcludedSlots)
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if err != nil {
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return forummodel.ForumPost{}, forummodel.ForumPostTemplate{}, nil, err
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}
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excludedDaysJSON, err := intSliceToJSONPtr(snapshot.ExcludedDaysOfWeek)
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if err != nil {
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return forummodel.ForumPost{}, forummodel.ForumPostTemplate{}, nil, err
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}
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labelsJSON, err := stringSliceToJSONPtr(snapshot.StrategyLabels)
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if err != nil {
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return forummodel.ForumPost{}, forummodel.ForumPostTemplate{}, nil, err
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}
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post := forummodel.ForumPost{
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AuthorUserID: req.ActorUserID,
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SourceTaskClassID: req.TaskClassID,
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Title: strings.TrimSpace(req.Title),
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Summary: strings.TrimSpace(req.Summary),
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TagsJSON: tagsJSON,
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IdempotencyKey: stringPtrFromNonEmpty(idempotencyKey),
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Status: forummodel.ForumPostStatusPublished,
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}
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template := forummodel.ForumPostTemplate{
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SourceTaskClassID: snapshot.TaskClassID,
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Mode: snapshot.Mode,
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StartDate: parseSnapshotDate(snapshot.StartDate),
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EndDate: parseSnapshotDate(snapshot.EndDate),
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SubjectType: snapshot.SubjectType,
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DifficultyLevel: snapshot.DifficultyLevel,
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CognitiveIntensity: snapshot.CognitiveIntensity,
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TotalSlots: snapshot.TotalSlots,
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AllowFillerCourse: snapshot.AllowFillerCourse,
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Strategy: snapshot.Strategy,
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ExcludedSlotsJSON: excludedSlotsJSON,
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ExcludedDaysOfWeekJSON: excludedDaysJSON,
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StrategyLabelsJSON: labelsJSON,
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ConfigSnapshotJSON: &configJSON,
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}
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snapshotItems := append([]TaskClassSnapshotItem(nil), snapshot.Items...)
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sort.SliceStable(snapshotItems, func(i, j int) bool {
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if snapshotItems[i].Order != snapshotItems[j].Order {
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return snapshotItems[i].Order < snapshotItems[j].Order
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}
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return snapshotItems[i].TaskItemID < snapshotItems[j].TaskItemID
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})
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items := make([]forummodel.ForumPostTemplateItem, 0, len(snapshotItems))
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for _, item := range snapshotItems {
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if strings.TrimSpace(item.Content) == "" {
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continue
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}
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items = append(items, forummodel.ForumPostTemplateItem{
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SourceTaskItemID: item.TaskItemID,
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Order: len(items) + 1,
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Content: item.Content,
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})
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}
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return post, template, items, nil
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}
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func configSnapshotJSON(snapshot TaskClassSnapshot) (string, error) {
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if strings.TrimSpace(snapshot.ConfigSnapshotJSON) != "" {
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return snapshot.ConfigSnapshotJSON, nil
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}
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raw, err := json.Marshal(map[string]any{
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"mode": snapshot.Mode,
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"start_date": snapshot.StartDate,
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"end_date": snapshot.EndDate,
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"subject_type": snapshot.SubjectType,
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"difficulty_level": snapshot.DifficultyLevel,
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"cognitive_intensity": snapshot.CognitiveIntensity,
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"total_slots": snapshot.TotalSlots,
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"allow_filler_course": snapshot.AllowFillerCourse,
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"strategy": snapshot.Strategy,
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"excluded_slots": snapshot.ExcludedSlots,
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"excluded_days_of_week": snapshot.ExcludedDaysOfWeek,
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"strategy_labels": snapshot.StrategyLabels,
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})
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if err != nil {
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return "", err
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}
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return string(raw), nil
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}
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func normalizeRecordNotFound(err error, fallback error) error {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return fallback
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}
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return err
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}
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