305 lines
12 KiB
Go
305 lines
12 KiB
Go
package service
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import (
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"encoding/json"
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"errors"
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"strings"
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"time"
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"infinite-canvas/backend/internal/model"
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)
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const maxUserStyleProfiles = 200
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type StyleProfileRequest struct {
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ProfileJSON string `json:"profileJson"`
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}
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type StyleProfileFavoriteRequest struct {
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Favorite bool `json:"favorite"`
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}
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type styleProfileDocument struct {
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SchemaVersion int `json:"schemaVersion"`
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PresetID string `json:"presetId"`
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Title string `json:"title"`
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Description string `json:"description"`
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Tags []string `json:"tags"`
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Prompt string `json:"prompt"`
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NegativePrompt string `json:"negativePrompt"`
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CoverURL string `json:"coverUrl"`
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SourceProfileID string `json:"sourceProfileId"`
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Selection map[string]string `json:"selection,omitempty"`
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Assets []styleProfileAsset `json:"assets"`
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ExecutionPolicy string `json:"executionPolicy"`
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Source string `json:"source"`
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Revision int `json:"revision"`
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}
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type styleProfileAsset struct {
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ID string `json:"id"`
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Kind string `json:"kind"`
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Provider string `json:"provider"`
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Title string `json:"title"`
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Enabled *bool `json:"enabled"`
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SourceID string `json:"sourceId"`
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SourceURL string `json:"sourceUrl"`
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Model string `json:"model"`
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Version string `json:"version"`
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BaseModels []string `json:"baseModels"`
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TriggerWords []string `json:"triggerWords"`
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PromptFragment string `json:"promptFragment"`
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Weight *float64 `json:"weight"`
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Parameters *styleProfileAssetParameters `json:"parameters"`
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ReferenceURLs []string `json:"referenceUrls"`
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ReferenceResourceIDs []string `json:"referenceResourceIds"`
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Status string `json:"status"`
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License *styleProfileAssetLicense `json:"license,omitempty"`
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}
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type styleProfileAssetParameters struct {
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Sampler string `json:"sampler"`
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Steps *int `json:"steps"`
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CFG *float64 `json:"cfg"`
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Size string `json:"size"`
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}
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type styleProfileAssetLicense struct {
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Commercial *bool `json:"commercial,omitempty"`
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Note string `json:"note,omitempty"`
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Source string `json:"source,omitempty"`
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CapturedAt string `json:"capturedAt,omitempty"`
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}
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func (s *Service) ListStyleProfiles(userID string) ([]model.StyleProfile, error) {
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return s.repo.StyleProfiles(userID)
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}
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func (s *Service) CreateStyleProfile(userID string, req StyleProfileRequest) (model.StyleProfile, error) {
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count, err := s.repo.StyleProfileCount(userID)
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if err != nil {
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return model.StyleProfile{}, err
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}
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if count >= maxUserStyleProfiles {
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return model.StyleProfile{}, BadAuthRequest("我的风格最多保存 200 个")
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}
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normalized, document, err := normalizeUserStyleProfileJSON(req.ProfileJSON, "", 1)
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if err != nil {
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return model.StyleProfile{}, BadAuthRequest(err.Error())
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}
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now := time.Now()
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profile := model.StyleProfile{
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ID: newID(), UserID: userID, Name: strings.TrimSpace(document.Title), Description: strings.TrimSpace(document.Description),
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CoverURL: strings.TrimSpace(document.CoverURL), TagsJSON: mustStyleProfileJSON(document.Tags), Favorite: false,
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Revision: 1, CreatedAt: now, UpdatedAt: now,
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}
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normalized, document, err = normalizeUserStyleProfileJSON(normalized, profile.ID, profile.Revision)
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if err != nil {
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return model.StyleProfile{}, BadAuthRequest(err.Error())
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}
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profile.ProfileJSON = normalized
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profile.Name = document.Title
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if err := s.repo.CreateStyleProfile(&profile); err != nil {
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return model.StyleProfile{}, err
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}
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return profile, nil
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}
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func (s *Service) UpdateStyleProfile(userID string, id string, req StyleProfileRequest) (model.StyleProfile, error) {
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profile, err := s.repo.StyleProfileForUser(userID, id)
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if err != nil {
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return model.StyleProfile{}, err
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}
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normalized, document, err := normalizeUserStyleProfileJSON(req.ProfileJSON, profile.ID, profile.Revision+1)
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if err != nil {
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return model.StyleProfile{}, BadAuthRequest(err.Error())
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}
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profile.Name = document.Title
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profile.Description = document.Description
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profile.CoverURL = document.CoverURL
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profile.TagsJSON = mustStyleProfileJSON(document.Tags)
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profile.ProfileJSON = normalized
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profile.Revision++
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profile.UpdatedAt = time.Now()
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if err := s.repo.UpdateStyleProfile(profile); err != nil {
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return model.StyleProfile{}, err
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}
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return *profile, nil
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}
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func (s *Service) SetStyleProfileFavorite(userID string, id string, favorite bool) error {
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return s.repo.SetStyleProfileFavorite(userID, id, favorite)
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}
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func (s *Service) TouchStyleProfile(userID string, id string) error {
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return s.repo.TouchStyleProfile(userID, id, time.Now())
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}
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func (s *Service) DeleteStyleProfile(userID string, id string) error {
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return s.repo.DeleteStyleProfile(userID, id)
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}
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func validateStyleProfileJSON(value string) (string, error) {
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trimmed := strings.TrimSpace(value)
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if trimmed == "" {
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return "", nil
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}
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if len([]byte(trimmed)) > 256*1024 {
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return "", errors.New("项目画风资产配置过大")
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}
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var profile styleProfileDocument
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if err := json.Unmarshal([]byte(trimmed), &profile); err != nil {
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return "", errors.New("项目画风资产配置不是合法 JSON")
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}
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if profile.SchemaVersion != 1 || strings.TrimSpace(profile.PresetID) == "" || strings.TrimSpace(profile.Title) == "" || strings.TrimSpace(profile.Prompt) == "" || profile.Revision < 1 {
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return "", errors.New("项目画风资产配置缺少必要字段")
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}
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if profile.Assets == nil {
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return "", errors.New("项目画风资产配置缺少 assets 数组")
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}
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if len(profile.Assets) > 20 {
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return "", errors.New("项目画风执行资产最多绑定 20 个")
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}
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if profile.ExecutionPolicy != "" && profile.ExecutionPolicy != "compatible-fallback" && profile.ExecutionPolicy != "strict-assets" {
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return "", errors.New("项目画风执行策略不支持")
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}
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if profile.Source != "builtin" && profile.Source != "user" && profile.Source != "external" {
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return "", errors.New("项目画风来源不支持")
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}
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if len(profile.Selection) > 20 {
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return "", errors.New("项目画风辅助标注最多 20 项")
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}
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for key, value := range profile.Selection {
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if strings.TrimSpace(key) == "" || len([]rune(key)) > 64 || len([]rune(value)) > 200 {
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return "", errors.New("项目画风辅助标注格式无效")
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}
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}
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assetIDs := make(map[string]struct{}, len(profile.Assets))
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for _, asset := range profile.Assets {
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if strings.TrimSpace(asset.ID) == "" || strings.TrimSpace(asset.Title) == "" || strings.TrimSpace(asset.Provider) == "" || !styleProfileValueAllowed(asset.Kind, "lora", "template", "reference", "prompt") || !styleProfileValueAllowed(asset.Status, "draft", "validated", "unavailable") {
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return "", errors.New("项目画风执行资产字段不完整")
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}
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if _, exists := assetIDs[asset.ID]; exists {
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return "", errors.New("项目画风执行资产 ID 不能重复")
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}
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assetIDs[asset.ID] = struct{}{}
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if asset.Weight != nil && (*asset.Weight < 0 || *asset.Weight > 2) {
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return "", errors.New("LoRA 权重必须在 0 到 2 之间")
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}
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if len(asset.BaseModels) > 20 {
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return "", errors.New("单个画风资产最多声明 20 个兼容模型")
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}
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if len(asset.TriggerWords) > 50 || len(asset.ReferenceURLs) > 20 || len(asset.ReferenceResourceIDs) > 20 {
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return "", errors.New("项目画风执行资产的触发词或参考图数量过多")
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}
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if asset.Parameters != nil {
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if asset.Parameters.Steps != nil && (*asset.Parameters.Steps < 1 || *asset.Parameters.Steps > 200) {
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return "", errors.New("画风资产 Steps 必须在 1 到 200 之间")
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}
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if asset.Parameters.CFG != nil && (*asset.Parameters.CFG < 0 || *asset.Parameters.CFG > 50) {
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return "", errors.New("画风资产 CFG 必须在 0 到 50 之间")
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}
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}
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if asset.Status == "validated" {
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switch asset.Kind {
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case "lora":
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if strings.TrimSpace(asset.SourceID) == "" && strings.TrimSpace(asset.SourceURL) == "" {
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return "", errors.New("已验证的 LoRA 必须填写来源资产 ID 或 URL")
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}
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case "template", "prompt":
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if strings.TrimSpace(asset.PromptFragment) == "" && len(nonEmptyStyleProfileStrings(asset.TriggerWords)) == 0 {
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return "", errors.New("已验证的模板或提示词模块必须填写提示词内容")
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}
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case "reference":
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if len(nonEmptyStyleProfileStrings(asset.ReferenceURLs)) == 0 && len(nonEmptyStyleProfileStrings(asset.ReferenceResourceIDs)) == 0 {
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return "", errors.New("已验证的参考图组必须绑定参考图")
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}
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}
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}
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}
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return trimmed, nil
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}
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func normalizeUserStyleProfileJSON(value string, presetID string, revision int64) (string, styleProfileDocument, error) {
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validated, err := validateStyleProfileJSON(value)
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if err != nil {
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return "", styleProfileDocument{}, err
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}
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var document styleProfileDocument
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if err := json.Unmarshal([]byte(validated), &document); err != nil {
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return "", styleProfileDocument{}, errors.New("用户风格配置解析失败")
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}
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if len([]rune(strings.TrimSpace(document.Title))) > 80 {
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return "", styleProfileDocument{}, errors.New("风格名称最多 80 个字")
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}
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if len([]rune(strings.TrimSpace(document.Description))) > 500 {
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return "", styleProfileDocument{}, errors.New("风格简介最多 500 个字")
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}
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if len(document.Tags) > 20 {
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return "", styleProfileDocument{}, errors.New("风格标签最多 20 个")
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}
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if len([]byte(document.CoverURL)) > 4096 || len([]byte(document.NegativePrompt)) > 64*1024 {
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return "", styleProfileDocument{}, errors.New("风格封面或负面 Prompt 过大")
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}
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if coverURL := strings.ToLower(strings.TrimSpace(document.CoverURL)); coverURL != "" && !strings.HasPrefix(coverURL, "http://") && !strings.HasPrefix(coverURL, "https://") && !strings.HasPrefix(coverURL, "/") && !strings.HasPrefix(coverURL, "data:image/") {
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return "", styleProfileDocument{}, errors.New("风格封面只支持 http(s)、站内路径或图片 Data URL")
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}
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if strings.TrimSpace(presetID) != "" {
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document.PresetID = strings.TrimSpace(presetID)
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}
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document.SourceProfileID = document.PresetID
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document.Source = "user"
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document.Revision = int(revision)
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document.Title = strings.TrimSpace(document.Title)
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document.Description = strings.TrimSpace(document.Description)
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document.CoverURL = strings.TrimSpace(document.CoverURL)
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document.NegativePrompt = strings.TrimSpace(document.NegativePrompt)
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document.Tags = nonEmptyStyleProfileStrings(document.Tags)
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encoded, err := json.Marshal(document)
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if err != nil {
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return "", styleProfileDocument{}, errors.New("用户风格配置序列化失败")
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}
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if len(encoded) > 256*1024 {
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return "", styleProfileDocument{}, errors.New("用户风格配置过大")
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}
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return string(encoded), document, nil
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}
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func validateStyleProfilePreset(presetID string, profileJSON string) error {
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if strings.TrimSpace(profileJSON) == "" {
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return nil
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}
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var profile styleProfileDocument
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if err := json.Unmarshal([]byte(profileJSON), &profile); err != nil {
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return errors.New("项目画风资产配置解析失败")
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}
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if strings.TrimSpace(presetID) == "" || strings.TrimSpace(profile.PresetID) != strings.TrimSpace(presetID) {
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return errors.New("项目画风预设与结构化快照不一致")
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}
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return nil
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}
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func mustStyleProfileJSON(value any) string {
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encoded, _ := json.Marshal(value)
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return string(encoded)
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}
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func nonEmptyStyleProfileStrings(values []string) []string {
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result := make([]string, 0, len(values))
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for _, value := range values {
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if trimmed := strings.TrimSpace(value); trimmed != "" {
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result = append(result, trimmed)
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}
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}
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return result
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}
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func styleProfileValueAllowed(value string, allowed ...string) bool {
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for _, item := range allowed {
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if value == item {
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return true
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}
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}
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return false
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}
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