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sub2api/backend/internal/service/channel_plaza.go
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李建琦 6d655c9903
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Sub2API v1.0 - AI API 网关(二开初始版本,基于上游 Wei-Shaw/sub2api)
2026-08-21 18:30:13 +08:00

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package service
import (
"context"
"fmt"
"sort"
"strings"
)
// PlazaOfficialPricing 模型广场展示用的 LiteLLM 官方参考价(USD per token)。
// 字段为 nil 表示官方数据中该项缺失(0 视为未配置)。
type PlazaOfficialPricing struct {
InputPrice *float64
OutputPrice *float64
CacheWritePrice *float64 // 5m 缓存写入(= LiteLLM cache_creation
CacheWrite1hPrice *float64 // 1h 缓存写入(LiteLLM cache_creation_above_1hr
CacheReadPrice *float64
}
// PlazaModel 模型广场中单个模型条目:渠道定价 + 官方参考价。
type PlazaModel struct {
Name string
Platform string
Pricing *ChannelModelPricing
OfficialPricing *PlazaOfficialPricing
}
// PlazaGroup 模型广场中以分组为顶层的条目。
//
// 与 AvailableGroupRef 相比多了 Description 与 ModelsModels 来自该分组关联渠道的
// 支持模型(普通分组按分组平台隔离,Composite 分组展开关联渠道已配置的
// 具体平台),与「可用渠道」页口径一致。
type PlazaGroup struct {
ID int64
Name string
Description string
Platform string
SubscriptionType string
RateMultiplier float64
PeakRateEnabled bool
PeakStart string
PeakEnd string
PeakRateMultiplier float64
IsExclusive bool
// 图片按次实付倍率:ImageRateIndependent 为 true 时,图片计费模型的实付
// = 档位价 × ImageRateMultiplier,不乘分组/用户专属倍率(与计费口径一致)。
ImageRateIndependent bool
ImageRateMultiplier float64
Models []PlazaModel
}
// ListPlazaGroups 返回模型广场数据:每个活跃分组附带其可用模型与定价。
//
// 聚合口径与 ListAvailable 一致(Active 渠道、SupportedModels 全局定价回落、
// 平台隔离),仅把顶层从渠道换成分组:
// - 渠道按 lower(name) 排序后遍历,保证同名模型去重结果确定;
// - 同分组同名模型「先见者胜」,仅当已存条目无定价而新条目有定价时升级替换;
// - 图片计费模型的档位价按实收口径合成(分组图片价 > 渠道档位价 > 渠道默认按次价,
// 见 plazaImageDisplayPricing);
// - 每个模型附带 LiteLLM 官方参考价(查不到为 nil);
// - 只返回 Models 非空的分组;分组按 RateMultiplier 升序(同倍率按名称),
// 组内模型按名称排序。
//
// 可见性过滤(专属分组)不在此层做,由 handler 按登录态裁剪。
func (s *ChannelService) ListPlazaGroups(ctx context.Context) ([]PlazaGroup, error) {
channels, err := s.repo.ListAll(ctx)
if err != nil {
return nil, fmt.Errorf("list channels: %w", err)
}
groups, err := s.groupRepo.ListActive(ctx)
if err != nil {
return nil, fmt.Errorf("list active groups: %w", err)
}
sort.SliceStable(channels, func(i, j int) bool {
return strings.ToLower(channels[i].Name) < strings.ToLower(channels[j].Name)
})
byGroup := make(map[int64]*PlazaGroup, len(groups))
groupEnt := make(map[int64]*Group, len(groups))
order := make([]int64, 0, len(groups))
for i := range groups {
g := &groups[i]
byGroup[g.ID] = &PlazaGroup{
ID: g.ID,
Name: g.Name,
Description: g.Description,
Platform: g.Platform,
SubscriptionType: g.SubscriptionType,
RateMultiplier: g.RateMultiplier,
PeakRateEnabled: g.PeakRateEnabled,
PeakStart: g.PeakStart,
PeakEnd: g.PeakEnd,
PeakRateMultiplier: g.PeakRateMultiplier,
IsExclusive: g.IsExclusive,
ImageRateIndependent: g.ImageRateIndependent,
ImageRateMultiplier: g.ImageRateMultiplier,
}
groupEnt[g.ID] = g
order = append(order, g.ID)
}
type modelKey struct {
platform string
name string
}
// modelIdx[groupID][platform+modelName] = index into byGroup[groupID].Models
modelIdx := make(map[int64]map[modelKey]int, len(groups))
for i := range channels {
ch := &channels[i]
if ch.Status != StatusActive {
continue
}
ch.normalizeBillingModelSource()
supported := ch.SupportedModels()
s.fillGlobalPricingFallback(supported)
for _, gid := range ch.GroupIDs {
pg, ok := byGroup[gid]
if !ok {
continue
}
idx := modelIdx[gid]
if idx == nil {
idx = make(map[modelKey]int, len(supported))
modelIdx[gid] = idx
}
for j := range supported {
m := supported[j]
if pg.Platform == PlatformComposite {
if !isConcreteRequestPlatform(m.Platform) {
continue
}
} else if m.Platform != pg.Platform {
continue
}
pricing := plazaImageDisplayPricing(m.Pricing, groupEnt[gid])
key := modelKey{platform: m.Platform, name: m.Name}
if at, seen := idx[key]; seen {
// 先见者胜;仅当已存条目无定价而新条目有定价时升级。
if pg.Models[at].Pricing == nil && pricing != nil {
pg.Models[at].Pricing = pricing
}
continue
}
idx[key] = len(pg.Models)
pg.Models = append(pg.Models, PlazaModel{
Name: m.Name,
Platform: m.Platform,
Pricing: pricing,
})
}
}
}
officialMemo := make(map[string]*PlazaOfficialPricing)
out := make([]PlazaGroup, 0, len(order))
for _, gid := range order {
pg := byGroup[gid]
if len(pg.Models) == 0 {
continue
}
sort.SliceStable(pg.Models, func(i, j int) bool {
if pg.Models[i].Name != pg.Models[j].Name {
return pg.Models[i].Name < pg.Models[j].Name
}
return pg.Models[i].Platform < pg.Models[j].Platform
})
for j := range pg.Models {
pg.Models[j].OfficialPricing = s.lookupOfficialPricing(pg.Models[j].Name, officialMemo)
}
out = append(out, *pg)
}
sort.SliceStable(out, func(i, j int) bool {
if out[i].RateMultiplier != out[j].RateMultiplier {
return out[i].RateMultiplier < out[j].RateMultiplier
}
return out[i].Name < out[j].Name
})
return out, nil
}
// plazaImageDisplayPricing 为图片计费模型合成展示定价,使档位价与实收口径一致:
// 每档(1K/2K/4K)单价 = 分组图片价 > 渠道同档位价 > 渠道默认按次价,无价的档不展示。
// 分组未配任何图片价、或定价非图片模式时原样返回。返回克隆,不修改入参
// (渠道定价指针指向缓存共享数据)。
func plazaImageDisplayPricing(p *ChannelModelPricing, g *Group) *ChannelModelPricing {
if p == nil || g == nil || p.BillingMode != BillingModeImage {
return p
}
if g.ImagePrice1K == nil && g.ImagePrice2K == nil && g.ImagePrice4K == nil {
return p
}
channelTierPrice := func(label string) *float64 {
for i := range p.Intervals {
if p.Intervals[i].TierLabel == label && p.Intervals[i].PerRequestPrice != nil {
return p.Intervals[i].PerRequestPrice
}
}
return p.PerRequestPrice
}
tiers := []struct {
label string
groupPrice *float64
}{
{"1K", g.ImagePrice1K},
{"2K", g.ImagePrice2K},
{"4K", g.ImagePrice4K},
}
clone := *p
clone.Intervals = make([]PricingInterval, 0, len(tiers))
for i, t := range tiers {
price := t.groupPrice
if price == nil {
price = channelTierPrice(t.label)
}
if price == nil {
continue
}
v := *price
clone.Intervals = append(clone.Intervals, PricingInterval{
TierLabel: t.label,
PerRequestPrice: &v,
SortOrder: i,
})
}
return &clone
}
// lookupOfficialPricing 查询模型的 LiteLLM 官方参考价,带 memo 避免同名模型重复转换。
// pricingService 为 nil(测试场景)或查不到时返回 nil。
func (s *ChannelService) lookupOfficialPricing(modelName string, memo map[string]*PlazaOfficialPricing) *PlazaOfficialPricing {
if s.pricingService == nil {
return nil
}
if cached, ok := memo[modelName]; ok {
return cached
}
var result *PlazaOfficialPricing
if lp := s.pricingService.GetModelPricing(modelName); lp != nil && !lp.TokenPricingAbsent {
result = &PlazaOfficialPricing{
InputPrice: nonZeroPtr(lp.InputCostPerToken),
OutputPrice: nonZeroPtr(lp.OutputCostPerToken),
CacheWritePrice: nonZeroPtr(lp.CacheCreationInputTokenCost),
CacheWrite1hPrice: nonZeroPtr(lp.CacheCreationInputTokenCostAbove1hr),
CacheReadPrice: nonZeroPtr(lp.CacheReadInputTokenCost),
}
if result.InputPrice == nil && result.OutputPrice == nil &&
result.CacheWritePrice == nil && result.CacheWrite1hPrice == nil && result.CacheReadPrice == nil {
result = nil
}
}
memo[modelName] = result
return result
}