init: web_hgdjc_server

app/service/playletser/home_config_test.go

@@ -0,0 +1,49 @@
+package playletser
+
+import (
+	"reflect"
+	"testing"
+	"videoweb/pub/models/homeconfigmod"
+	"videoweb/pub/models/playletmod"
+
+	"go.mongodb.org/mongo-driver/bson"
+)
+
+func TestHomeConfigDisplayLimit(t *testing.T) {
+	tests := []struct {
+		name   string
+		config *homeconfigmod.HomeConfig
+		want   int64
+	}{
+		{name: "旧题材配置", config: &homeconfigmod.HomeConfig{Type: homeconfigmod.TypeTheme}, want: 8},
+		{name: "自定义题材数量", config: &homeconfigmod.HomeConfig{Type: homeconfigmod.TypeTheme, Limit: 5}, want: 5},
+		{name: "旧短剧配置", config: &homeconfigmod.HomeConfig{Type: homeconfigmod.TypePlaylet}, want: 12},
+		{name: "自定义短剧数量", config: &homeconfigmod.HomeConfig{Type: homeconfigmod.TypePlaylet, Limit: 20}, want: 20},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := homeConfigDisplayLimit(tt.config); got != tt.want {
+				t.Fatalf("homeConfigDisplayLimit() = %d, want %d", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestHomeConfigSortTypeFourUsesOnlineAt(t *testing.T) {
+	filter, sort := homeConfigPlayletQuery(homeconfigmod.SortTypeOnlineAt, 0)
+	if _, ok := filter[playletmod.FN.Playlet.Preview]; ok {
+		t.Fatal("上架时间排序不应过滤无预告片的短剧")
+	}
+	want := bson.D{
+		{Key: playletmod.FN.Playlet.OnlineAt, Value: -1},
+		{Key: playletmod.FN.Playlet.Id, Value: -1},
+	}
+	if !reflect.DeepEqual(sort, want) {
+		t.Fatalf("上架时间排序 = %v, want %v", sort, want)
+	}
+
+	_, latestSort := homeConfigPlayletQuery(homeconfigmod.SortTypeLatest, 0)
+	if len(latestSort) == 0 || latestSort[0].Key != playletmod.FN.Playlet.UpdatedAt {
+		t.Fatalf("最近更新应按更新时间排序，得到 %v", latestSort)
+	}
+}

app/service/playletser/home_modules.go

@@ -0,0 +1,231 @@
+package playletser
+
+import (
+	"context"
+	"strings"
+	"videoweb/app/api/proto"
+	"videoweb/app/service/configser"
+	"videoweb/app/service/playletcache"
+	"videoweb/pub/common/srvdef"
+	"videoweb/pub/models/homeconfigmod"
+	"videoweb/pub/models/playletmod"
+
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo/options"
+)
+
+func homeConfigToModule(item *proto.HomeConfigData) *proto.HomeModuleData {
+	moduleType := int32(1)
+	if item.Type == homeconfigmod.TypeTheme {
+		moduleType = 2
+	}
+	return &proto.HomeModuleData{Id: item.Id, Slug: item.Slug, Title: item.Name, Desc: item.Desc, Keyword: item.Keyword, Label: item.Label,
+		Style: item.Style, CardBackgroundImage: item.CardBackgroundImage, ModuleType: moduleType, DataType: 1,
+		RecommendType: item.RecommendType, CategoryId: item.CategoryId, Rank: item.Rank, Limit: item.Limit, SeoInfo: item.SeoInfo,
+		List: item.List, TopicList: item.ThemeList}
+}
+
+// recommendType=0 保留历史 sortType 的含义
+func homeConfigPlayletQueryForConfig(config *homeconfigmod.HomeConfig) (bson.M, bson.D, int64) {
+	categoryID := config.CategoryId
+	if categoryID == 0 && config.RecommendType == 0 && config.Type == homeconfigmod.TypePlaylet {
+		categoryID = homeConfigCategoryID(config.SortType, config.Id)
+	}
+	if config.RecommendType == 0 {
+		filter, sort := homeConfigPlayletQuery(config.SortType, categoryID)
+		return filter, sort, categoryID
+	}
+	filter := homeUpPlayletFilter(nil)
+	field := playletmod.FN.Playlet.UpdatedAt
+	switch config.RecommendType {
+	case 2:
+		field = playletmod.FN.Playlet.CountLike
+	case 3:
+		field = playletmod.FN.Playlet.CountBrowse
+	case 4:
+		field = playletmod.FN.Playlet.HeatValue
+	case 5:
+		if categoryID > 0 {
+			filter[playletmod.FN.Playlet.CategoryIds] = categoryID
+		}
+		field = playletmod.FN.Playlet.RecommendRank
+	}
+	return filter, bson.D{{Key: field, Value: -1}, {Key: playletmod.FN.Playlet.Id, Value: -1}}, categoryID
+}
+
+func findHomeConfigPlayletListForConfig(ctx context.Context, config *homeconfigmod.HomeConfig, limit int64) (playletmod.PlayletList, *srvdef.SrvErr) {
+	if config.RecommendType == 0 {
+		_, _, categoryID := homeConfigPlayletQueryForConfig(config)
+		return findHomeConfigPlayletList(ctx, config.SortType, categoryID, limit)
+	}
+	filter, sort, categoryID := homeConfigPlayletQueryForConfig(config)
+	if config.RecommendType == 5 {
+		if categoryID <= 0 {
+			return make(playletmod.PlayletList, 0), nil
+		}
+		return playletmod.FindManyPlayletByCategoryRank(ctx, filter, categoryID, 0, limit, playletmod.CategoryRankSort(), playletHomeProjection)
+	}
+	return findHomePlaylets(ctx, filter, sort, limit)
+}
+
+func findHomeConfigThemePlayletsForConfig(ctx context.Context, config *homeconfigmod.HomeConfig, skip, limit int64) ([]homeConfigThemePlaylets, playletmod.PlayletList, *srvdef.SrvErr) {
+	if len(config.TopicIds) == 0 {
+		if skip == 0 {
+			return findHomeConfigThemePlaylets(ctx, limit)
+		}
+		groups, _, all, err := findHomeConfigThemePlayletsPage(ctx, skip, limit)
+		return groups, all, err
+	}
+	selected := map[int64]bool{}
+	for _, id := range config.TopicIds {
+		selected[id] = true
+	}
+	result := make([]homeConfigThemePlaylets, 0)
+	all := make(playletmod.PlayletList, 0)
+	var offset int64
+	for _, theme := range playletcache.ListEnabledThemesByPlayletCount(0) {
+		if theme == nil || !selected[theme.Id] {
+			continue
+		}
+		filter := topicDetailPlayletFilter(theme.Id)
+		count, err := playletmod.CountPlaylet(ctx, filter)
+		if err != nil {
+			return nil, nil, err
+		}
+		if count == 0 {
+			continue
+		}
+		if offset < skip {
+			offset++
+			continue
+		}
+		if int64(len(result)) >= limit {
+			break
+		}
+		list, err := findHomePlaylets(ctx, filter, playletTopicDetailSort(topicDetailSortEdit), topicListPlayletLimit)
+		if err != nil {
+			return nil, nil, err
+		}
+		result = append(result, homeConfigThemePlaylets{Theme: theme, Playlets: list, TotalCount: count})
+		all = append(all, list...)
+		offset++
+	}
+	return result, all, nil
+}
+
+func countHomeConfigThemes(ctx context.Context, config *homeconfigmod.HomeConfig) (int64, *srvdef.SrvErr) {
+	if len(config.TopicIds) == 0 {
+		_, count, _, err := findHomeConfigThemePlayletsPage(ctx, 0, 0)
+		return count, err
+	}
+	selected := map[int64]bool{}
+	for _, id := range config.TopicIds {
+		selected[id] = true
+	}
+	var count int64
+	for _, theme := range playletcache.ListEnabledThemesByPlayletCount(0) {
+		if theme == nil || !selected[theme.Id] {
+			continue
+		}
+		filter := topicDetailPlayletFilter(theme.Id)
+		total, err := playletmod.CountPlaylet(ctx, filter)
+		if err != nil {
+			return 0, err
+		}
+		if total > 0 {
+			count++
+		}
+	}
+	return count, nil
+}
+
+func HomeConfigList(ctx context.Context, req *proto.PlayletHomeConfigListReq) (*proto.PlayletHomeConfigListResp, *srvdef.SrvErr) {
+	if req == nil || (req.Id <= 0 && strings.TrimSpace(req.Slug) == "") {
+		return nil, srvdef.New(srvdef.ErrParamError, "首页配置ID或slug不能为空", "")
+	}
+	filter := bson.M{}
+	if slug := strings.TrimSpace(req.Slug); slug != "" {
+		filter[homeconfigmod.FN.HomeConfig.Slug] = slug
+	} else {
+		filter[homeconfigmod.FN.HomeConfig.Id] = req.Id
+	}
+	config, err := homeconfigmod.FindOneHomeConfig(ctx, filter)
+	if err != nil {
+		return nil, err
+	}
+	if config.Type != homeconfigmod.TypePlaylet && config.Type != homeconfigmod.TypeTheme {
+		return nil, srvdef.New(srvdef.ErrNoData, "首页配置不存在", "")
+	}
+	pageNum, pageSize := req.PageNum, req.PageSize
+	if pageNum <= 0 {
+		pageNum = 1
+	}
+	if pageSize <= 0 {
+		pageSize = 20
+	}
+	if pageSize > maxPageSize {
+		pageSize = maxPageSize
+	}
+	module := &proto.HomeModuleData{Id: config.Id, Slug: config.Slug, Title: config.Name, Desc: config.Desc, Keyword: homeconfigmod.NormalizeKeywords(config.Keyword), Label: config.Label,
+		Style: config.Style, CardBackgroundImage: withImageDomain(ctx, config.CardBackgroundImage), DataType: 1,
+		RecommendType: config.RecommendType, CategoryId: config.CategoryId, Rank: config.Rank, Limit: homeConfigDisplayLimit(config), SeoInfo: config.SeoInfo,
+		List: make([]*proto.CommonData, 0), TopicList: make([]*proto.HomeConfigThemeData, 0)}
+	if config.Type == homeconfigmod.TypeTheme {
+		module.ModuleType = 2
+	} else {
+		module.ModuleType = 1
+	}
+	resp := &proto.PlayletHomeConfigListResp{Config: module, PageNum: int(pageNum), PageSize: int(pageSize),
+		List: make([]*proto.CommonData, 0), TopicList: make([]*proto.HomeConfigThemeData, 0), Advitise: configser.GetAdvitise()}
+	if !config.Status {
+		return resp, nil
+	}
+	skip := (pageNum - 1) * pageSize
+	if config.Type == homeconfigmod.TypePlaylet {
+		playletFilter, sort, categoryID := homeConfigPlayletQueryForConfig(config)
+		if (config.RecommendType == 5 || (config.RecommendType == 0 && config.SortType == homeconfigmod.SortTypeCategory)) && categoryID <= 0 {
+			return resp, nil
+		}
+		resp.TotalCount, err = playletmod.CountPlaylet(ctx, playletFilter)
+		if err != nil {
+			return nil, err
+		}
+		var list playletmod.PlayletList
+		if config.RecommendType == 5 || (config.RecommendType == 0 && config.SortType == homeconfigmod.SortTypeCategory) {
+			list, err = playletmod.FindManyPlayletByCategoryRank(ctx, playletFilter, categoryID, skip, pageSize, playletmod.CategoryRankSort(), playletHomeProjection)
+		} else {
+			list, err = findHomePlaylets(ctx, playletFilter, sort, pageSize, options.Find().SetSkip(skip))
+		}
+		if err != nil {
+			return nil, err
+		}
+		themeNames, err := buildHomeThemeNameMap(ctx, list)
+		if err != nil {
+			return nil, err
+		}
+		tagNames, err := buildHomeTagNameMap(ctx, list)
+		if err != nil {
+			return nil, err
+		}
+		resp.List = playletsToHomeCommonData(ctx, list, themeNames, tagNames)
+		return resp, nil
+	}
+	resp.TotalCount, err = countHomeConfigThemes(ctx, config)
+	if err != nil {
+		return nil, err
+	}
+	groups, all, err := findHomeConfigThemePlayletsForConfig(ctx, config, skip, pageSize)
+	if err != nil {
+		return nil, err
+	}
+	themeNames, err := buildHomeThemeNameMap(ctx, all)
+	if err != nil {
+		return nil, err
+	}
+	tagNames, err := buildHomeTagNameMap(ctx, all)
+	if err != nil {
+		return nil, err
+	}
+	resp.TopicList = homeConfigThemesToHomeData(ctx, groups, themeNames, tagNames)
+	return resp, nil
+}

app/service/playletser/home_modules_test.go

@@ -0,0 +1,38 @@
+package playletser
+
+import (
+	"testing"
+	"videoweb/pub/models/homeconfigmod"
+	"videoweb/pub/models/playletmod"
+)
+
+func TestHomeConfigPlayletQueryForConfig(t *testing.T) {
+	tests := []struct {
+		name        string
+		config      homeconfigmod.HomeConfig
+		field       string
+		category    int64
+		recommended bool
+	}{
+		{name: "legacy recommendation", config: homeconfigmod.HomeConfig{SortType: homeconfigmod.SortTypeRecommend}, field: playletmod.FN.Playlet.RecommendRank, recommended: true},
+		{name: "new likes", config: homeconfigmod.HomeConfig{RecommendType: 2}, field: playletmod.FN.Playlet.CountLike},
+		{name: "new category", config: homeconfigmod.HomeConfig{RecommendType: 5, CategoryId: 42}, field: playletmod.FN.Playlet.RecommendRank, category: 42},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			filter, sort, category := homeConfigPlayletQueryForConfig(&tt.config)
+			if category != tt.category {
+				t.Fatalf("category = %d, want %d", category, tt.category)
+			}
+			if len(sort) == 0 || sort[0].Key != tt.field {
+				t.Fatalf("sort = %v, want %s", sort, tt.field)
+			}
+			if _, ok := filter[playletmod.FN.Playlet.IsRecommend]; ok != tt.recommended {
+				t.Fatalf("recommend filter = %v, want %v", ok, tt.recommended)
+			}
+			if tt.category > 0 && filter[playletmod.FN.Playlet.CategoryIds] != tt.category {
+				t.Fatalf("category filter = %v", filter)
+			}
+		})
+	}
+}

app/service/playletser/like_list.go

@@ -0,0 +1,91 @@
+package playletser
+
+import (
+	"context"
+	"videoweb/app/api/proto"
+	"videoweb/pub/common/srvdef"
+	"videoweb/pub/models/playletlikemod"
+	"videoweb/pub/models/playletmod"
+
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo/options"
+)
+
+// LikeList 分页查询当前用户点赞的短剧
+func LikeList(ctx context.Context, userID int64, req *proto.PlayletLikeListReq) (*proto.PlayletLikeListResp, *srvdef.SrvErr) {
+	if userID <= 0 {
+		return nil, srvdef.New(srvdef.InvalidToken, "请先登录", "请先登录")
+	}
+	if req == nil {
+		return nil, srvdef.New(srvdef.ErrParamError, "", "")
+	}
+	pageNum, pageSize := normalizePlayletPage(req.PageNum, req.PageSize)
+	filter := bson.M{playletlikemod.FN.PlayletLike.UserId: userID}
+	totalCount, err := playletlikemod.CountPlayletLike(ctx, filter)
+	if err != nil {
+		return nil, err
+	}
+	resp := &proto.PlayletLikeListResp{
+		TotalCount: totalCount, PageNum: int(pageNum), PageSize: int(pageSize),
+		List: make([]proto.PlayletLikeData, 0),
+	}
+	skip := (pageNum - 1) * pageSize
+	if skip >= totalCount {
+		return resp, nil
+	}
+	likes, err := playletlikemod.FindManyPlayletLike(ctx, filter, options.Find().
+		SetProjection(bson.D{
+			{Key: playletlikemod.FN.PlayletLike.Id, Value: 1},
+			{Key: playletlikemod.FN.PlayletLike.PlayletId, Value: 1},
+			{Key: playletlikemod.FN.PlayletLike.CreatedAt, Value: 1},
+		}).
+		SetSort(bson.D{
+			{Key: playletlikemod.FN.PlayletLike.CreatedAt, Value: -1},
+			{Key: playletlikemod.FN.PlayletLike.Id, Value: -1},
+		}).
+		SetSkip(skip).
+		SetLimit(pageSize))
+	if err != nil {
+		return nil, err
+	}
+	ids := make([]int64, 0, len(likes))
+	for _, like := range likes {
+		if like != nil && like.PlayletId > 0 {
+			ids = append(ids, like.PlayletId)
+		}
+	}
+	if len(ids) == 0 {
+		return resp, nil
+	}
+	playlets, err := playletmod.FindManyPlaylet(ctx, bson.M{
+		playletmod.FN.Playlet.Id: bson.M{"$in": ids},
+	}, options.Find().SetProjection(playletHomeProjection))
+	if err != nil {
+		return nil, err
+	}
+	themeNameMap, err := buildHomeThemeNameMap(ctx, playlets)
+	if err != nil {
+		return nil, err
+	}
+	tagNameMap, err := buildHomeTagNameMap(ctx, playlets)
+	if err != nil {
+		return nil, err
+	}
+	dataByID := make(map[int64]*proto.CommonData, len(playlets))
+	for _, data := range playletsToHomeCommonData(ctx, playlets, themeNameMap, tagNameMap) {
+		dataByID[data.Id] = data
+	}
+	for _, like := range likes {
+		if like == nil {
+			continue
+		}
+		data := dataByID[like.PlayletId]
+		if data == nil {
+			continue
+		}
+		resp.List = append(resp.List, proto.PlayletLikeData{
+			CommonData: *data, IsLike: 1, LikedAt: like.CreatedAt,
+		})
+	}
+	return resp, nil
+}

app/service/playletser/operate_random.go

@@ -0,0 +1,81 @@
+package playletser
+
+import (
+	"context"
+	"time"
+	"videoweb/pub/common/srvdef"
+	"videoweb/pub/models/playletmod"
+
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo/options"
+)
+
+const operateRandomModulus int64 = 2147483647
+
+func operateListFilter(typ int64) bson.M {
+	filter := homeUpPlayletFilter(nil)
+	if typ == operateListOriginal {
+		filter[playletmod.FN.Playlet.IsRecommend] = true
+	}
+	return filter
+}
+
+func operateListSort(typ int64) bson.D {
+	if typ == operateListHot {
+		return bson.D{{Key: playletmod.FN.Playlet.HeatValue, Value: -1}, {Key: playletmod.FN.Playlet.Id, Value: -1}}
+	}
+	return playletRecentlyUpdatedSort()
+}
+
+// findRandomOperatePlaylets 按每日固定的伪随机顺序分页查询短剧
+func findRandomOperatePlaylets(ctx context.Context, filter bson.M, skip, limit int64, now time.Time) (playletmod.PlayletList, *srvdef.SrvErr) {
+	var rows []struct {
+		Id int64 `bson:"_id"`
+	}
+	if err := playletmod.AggregatePlaylet(ctx, &rows, operateRandomPipeline(filter, skip, limit, now)); err != nil {
+		return nil, err
+	}
+	ids := make([]int64, 0, len(rows))
+	for _, row := range rows {
+		ids = append(ids, row.Id)
+	}
+	if len(ids) == 0 {
+		return make(playletmod.PlayletList, 0), nil
+	}
+	queryFilter := bson.M{playletmod.FN.Playlet.Id: bson.M{"$in": ids}}
+	for key, value := range filter {
+		queryFilter[key] = value
+	}
+	list, err := playletmod.FindManyPlaylet(ctx, queryFilter, options.Find().SetProjection(playletHomeProjection))
+	if err != nil {
+		return nil, err
+	}
+	byID := make(map[int64]*playletmod.Playlet, len(list))
+	for _, item := range list {
+		if item != nil {
+			byID[item.Id] = item
+		}
+	}
+	ordered := make(playletmod.PlayletList, 0, len(ids))
+	for _, id := range ids {
+		if item := byID[id]; item != nil {
+			ordered = append(ordered, item)
+		}
+	}
+	return ordered, nil
+}
+
+func operateRandomPipeline(filter bson.M, skip, limit int64, now time.Time) []bson.M {
+	day := (now.Unix() + 8*60*60) / (24 * 60 * 60)
+	factor := int64(48271) + day%997*2767
+	idMod := bson.M{"$mod": bson.A{"$_id", operateRandomModulus}}
+	score := bson.M{"$mod": bson.A{bson.M{"$multiply": bson.A{idMod, factor}}, operateRandomModulus}}
+	return []bson.M{
+		{"$match": filter},
+		{"$project": bson.M{"_id": 1}},
+		{"$addFields": bson.M{"randomScore": score}},
+		{"$sort": bson.D{{Key: "randomScore", Value: 1}, {Key: "_id", Value: 1}}},
+		{"$skip": skip},
+		{"$limit": limit},
+	}
+}

app/service/playletser/operate_random_test.go

@@ -0,0 +1,46 @@
+package playletser
+
+import (
+	"reflect"
+	"testing"
+	"time"
+	"videoweb/pub/models/playletmod"
+
+	"go.mongodb.org/mongo-driver/bson"
+)
+
+func TestOperateListFiltersAndSorts(t *testing.T) {
+	for _, typ := range []int64{operateListLatest, operateListHot, operateListOriginal, operateListRandom} {
+		filter := operateListFilter(typ)
+		if filter[playletmod.FN.Playlet.Status] != playletmod.StatusUp {
+			t.Fatalf("type %d must contain the up status filter", typ)
+		}
+		_, recommend := filter[playletmod.FN.Playlet.IsRecommend]
+		if recommend != (typ == operateListOriginal) {
+			t.Fatalf("type %d recommend filter = %v", typ, recommend)
+		}
+	}
+	if got := operateListSort(operateListLatest)[0].Key; got != playletmod.FN.Playlet.UpdatedAt {
+		t.Fatalf("latest sort = %s", got)
+	}
+	if got := operateListSort(operateListHot)[0].Key; got != playletmod.FN.Playlet.HeatValue {
+		t.Fatalf("hot sort = %s", got)
+	}
+}
+
+func TestOperateRandomPipelineIsStableWithinDay(t *testing.T) {
+	filter := bson.M{playletmod.FN.Playlet.Status: playletmod.StatusUp}
+	day := time.Date(2026, 10, 24, 1, 0, 0, 0, time.UTC)
+	first := operateRandomPipeline(filter, 20, 10, day)
+	second := operateRandomPipeline(filter, 20, 10, day.Add(time.Hour))
+	if !reflect.DeepEqual(first, second) {
+		t.Fatal("random order changed within one China Standard Time day")
+	}
+	third := operateRandomPipeline(filter, 20, 10, day.Add(24*time.Hour))
+	if reflect.DeepEqual(first, third) {
+		t.Fatal("random order did not change on the next China Standard Time day")
+	}
+	if first[4]["$skip"] != int64(20) || first[5]["$limit"] != int64(10) {
+		t.Fatalf("pagination stages = %v", first)
+	}
+}

app/service/playletser/slug.go

@@ -0,0 +1,77 @@
+package playletser
+
+import (
+	"context"
+	"strings"
+	"videoweb/app/service/playletcache"
+	"videoweb/pub/common/srvdef"
+	"videoweb/pub/models/playletmod"
+	"videoweb/pub/models/playlettagmod"
+	"videoweb/pub/models/playletthememod"
+
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo/options"
+)
+
+// resolvePlayletID 解析短剧ID：slug 非空时先按 slug 查 ID，否则使用传入 ID。
+func resolvePlayletID(ctx context.Context, id int64, slug string, required bool) (int64, *srvdef.SrvErr) {
+	slug = strings.TrimSpace(slug)
+	if slug != "" {
+		item, err := playletmod.FindOnePlaylet(ctx, bson.M{
+			playletmod.FN.Playlet.Slug: slug,
+		}, options.FindOne().SetProjection(bson.D{
+			{Key: playletmod.FN.Playlet.Id, Value: 1},
+		}))
+		if err != nil {
+			return 0, err
+		}
+		return item.Id, nil
+	}
+	if required && id <= 0 {
+		return 0, srvdef.New(srvdef.ErrParamError, "短剧ID不能为空", "短剧ID不能为空")
+	}
+	return id, nil
+}
+
+// resolveThemeID 解析题材ID：slug 非空时先按 slug 查 ID，否则使用传入 ID（0 表示不按题材筛选）。
+func resolveThemeID(ctx context.Context, id int64, slug string) (int64, *srvdef.SrvErr) {
+	slug = strings.TrimSpace(slug)
+	if slug == "" {
+		return id, nil
+	}
+	if item := playletcache.GetThemeBySlug(slug); item != nil {
+		return item.Id, nil
+	}
+	theme, err := playletthememod.FindOnePlayletTheme(ctx, bson.M{
+		playletthememod.FN.PlayletTheme.Slug: slug,
+	}, options.FindOne().SetProjection(bson.D{
+		{Key: playletthememod.FN.PlayletTheme.Id, Value: 1},
+	}))
+	if err != nil {
+		return 0, err
+	}
+	return theme.Id, nil
+}
+
+// resolveTagID 解析标签ID：slug 非空时先按 slug 查 ID，否则使用传入 ID。
+func resolveTagID(ctx context.Context, id int64, slug string) (int64, *srvdef.SrvErr) {
+	slug = strings.TrimSpace(slug)
+	if slug != "" {
+		if item := playletcache.GetTagBySlug(slug); item != nil {
+			return item.Id, nil
+		}
+		tag, err := playlettagmod.FindOnePlayletTag(ctx, bson.M{
+			playlettagmod.FN.PlayletTag.Slug: slug,
+		}, options.FindOne().SetProjection(bson.D{
+			{Key: playlettagmod.FN.PlayletTag.Id, Value: 1},
+		}))
+		if err != nil {
+			return 0, err
+		}
+		return tag.Id, nil
+	}
+	if id <= 0 {
+		return 0, srvdef.New(srvdef.ErrParamError, "标签ID不能为空", "标签ID不能为空")
+	}
+	return id, nil
+}

app/service/playletser/topic_group.go

@@ -0,0 +1,131 @@
+package playletser
+
+import (
+	"context"
+	"strings"
+	"videoweb/app/api/proto"
+	"videoweb/pub/common/srvdef"
+	"videoweb/pub/models/playletmod"
+	"videoweb/pub/models/playletthememod"
+	"videoweb/pub/models/playlettopicgroupmod"
+
+	"go.mongodb.org/mongo-driver/bson"
+)
+
+func enabledTopicGroups(ctx context.Context) (playlettopicgroupmod.PlayletTopicGroupList, *srvdef.SrvErr) {
+	return playlettopicgroupmod.FindMany(ctx, bson.M{"status": true})
+}
+
+type topicPlayletCount struct {
+	Id    int64 `bson:"_id"`
+	Count int64 `bson:"count"`
+}
+
+// topicGroupPage 分页查询区块下有已上架短剧的专题
+func topicGroupPage(ctx context.Context, group *playlettopicgroupmod.PlayletTopicGroup, skip, limit int64) (playletthememod.PlayletThemeList, map[int64]int64, int64, *srvdef.SrvErr) {
+	counts := make(map[int64]int64)
+	if len(group.TopicIds) == 0 {
+		return playletthememod.PlayletThemeList{}, counts, 0, nil
+	}
+	themes, err := playletthememod.FindManyPlayletTheme(ctx, bson.M{
+		playletthememod.FN.PlayletTheme.Id:     bson.M{"$in": group.TopicIds},
+		playletthememod.FN.PlayletTheme.Status: true,
+	})
+	if err != nil {
+		return nil, nil, 0, err
+	}
+	byID := make(map[int64]*playletthememod.PlayletTheme, len(themes))
+	for _, theme := range themes {
+		if theme != nil {
+			byID[theme.Id] = theme
+		}
+	}
+	rows := make([]topicPlayletCount, 0)
+	err = playletmod.AggregatePlaylet(ctx, &rows, []bson.M{
+		{"$match": bson.M{playletmod.FN.Playlet.Status: playletmod.StatusUp, playletmod.FN.Playlet.ThemeIds: bson.M{"$in": group.TopicIds}}},
+		{"$unwind": "$" + playletmod.FN.Playlet.ThemeIds},
+		{"$match": bson.M{playletmod.FN.Playlet.ThemeIds: bson.M{"$in": group.TopicIds}}},
+		{"$group": bson.M{"_id": "$" + playletmod.FN.Playlet.ThemeIds, "count": bson.M{"$sum": 1}}},
+	})
+	if err != nil {
+		return nil, nil, 0, err
+	}
+	for _, row := range rows {
+		counts[row.Id] = row.Count
+	}
+	available := make(playletthememod.PlayletThemeList, 0, len(themes))
+	seen := make(map[int64]bool, len(group.TopicIds))
+	for _, id := range group.TopicIds {
+		if seen[id] {
+			continue
+		}
+		seen[id] = true
+		if theme := byID[id]; theme != nil && counts[id] > 0 {
+			available = append(available, theme)
+		}
+	}
+	total := int64(len(available))
+	if skip >= total {
+		return playletthememod.PlayletThemeList{}, counts, total, nil
+	}
+	end := skip + limit
+	if end > total {
+		end = total
+	}
+	return available[skip:end], counts, total, nil
+}
+
+// topicGroupPageData 组装区块当前页专题及单部短剧预览
+func topicGroupPageData(ctx context.Context, group *playlettopicgroupmod.PlayletTopicGroup, skip, limit int64) (*proto.PlayletTopicGroupPageItem, *srvdef.SrvErr) {
+	themes, counts, totalCount, err := topicGroupPage(ctx, group, skip, limit)
+	if err != nil {
+		return nil, err
+	}
+	page := &proto.PlayletTopicGroupPageItem{
+		Id: group.Id, Name: group.Name, Desc: group.Desc, Rank: group.Rank,
+		TotalCount: totalCount, List: make([]*proto.PlayletTopicPageItem, 0, len(themes)),
+	}
+	if len(themes) == 0 {
+		return page, nil
+	}
+	previewByTheme := make(map[int64]playletmod.PlayletList, len(themes))
+	previews := make(playletmod.PlayletList, 0, len(themes))
+	for _, theme := range themes {
+		filter, sort := playletTopicPagePlayletQuery(0, theme.Id)
+		list, err := findHomePlaylets(ctx, filter, sort, 1)
+		if err != nil {
+			return nil, err
+		}
+		previewByTheme[theme.Id] = list
+		previews = append(previews, list...)
+	}
+	themeNameMap, err := buildHomeThemeNameMap(ctx, previews)
+	if err != nil {
+		return nil, err
+	}
+	tagNameMap, err := buildHomeTagNameMap(ctx, previews)
+	if err != nil {
+		return nil, err
+	}
+	for _, theme := range themes {
+		preview := playletsToHomeCommonData(ctx, previewByTheme[theme.Id], themeNameMap, tagNameMap)
+		covers := make([]string, 0, len(preview))
+		if len(preview) > 0 {
+			cover := preview[0].HorizontalCover
+			if cover == "" {
+				cover = preview[0].Cover
+			}
+			if cover != "" {
+				covers = append(covers, cover)
+			}
+		}
+		page.List = append(page.List, &proto.PlayletTopicPageItem{
+			Id: theme.Id, Name: theme.Name, Slug: theme.Slug,
+			Desc: strings.TrimSpace(theme.SeoInfo.Description),
+			Icon: withImageDomain(ctx, theme.Icon), Rank: theme.Rank,
+			PlayletCount: counts[theme.Id], Covers: covers, List: preview,
+			SeoInfo: buildPageSeoInfoFromValue(theme.SeoInfo, theme.Name, "", buildPlayletThemeListCanonicalURL(theme.Slug, theme.Id)),
+		})
+	}
+	return page, nil
+}