feat(kol): store KOL prompt content in database with object storage fallback

Add prompt_content columns to kol_prompts and kol_prompt_revisions so prompt bodies live alongside their metadata, eliminating an extra round trip to object storage for the common read path while keeping the old asset key as a fallback for legacy rows. Reads go through a singleflight-deduped, cache-backed loader that prefers the database column, falls back to the asset key, and tolerates missing objects via a new objectstorage.ErrObjectNotFound returned by both the Aliyun OSS and MinIO clients on 404/NoSuchKey responses. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-24 01:47:51 +08:00
parent 075e282c76
commit db95b8e4ee
12 changed files with 225 additions and 58 deletions
@@ -0,0 +1,80 @@
+package app
+
+import (
+	"context"
+	"errors"
+	"strings"
+
+	"golang.org/x/sync/singleflight"
+
+	sharedcache "github.com/geo-platform/tenant-api/internal/shared/cache"
+	"github.com/geo-platform/tenant-api/internal/shared/objectstorage"
+	"github.com/geo-platform/tenant-api/internal/tenant/repository"
+)
+
+func loadKolPromptContent(
+	ctx context.Context,
+	cache sharedcache.Cache,
+	group *singleflight.Group,
+	promptRepo repository.KolPromptRepository,
+	asset *KolPromptAsset,
+	prompt *repository.KolPrompt,
+) (string, error) {
+	if prompt == nil {
+		return "", nil
+	}
+
+	loader := func(loadCtx context.Context) (string, error) {
+		return loadKolPromptContentUncached(loadCtx, promptRepo, asset, prompt)
+	}
+	if cache == nil || group == nil {
+		return loader(ctx)
+	}
+
+	return sharedcache.LoadJSON(
+		ctx,
+		cache,
+		group,
+		kolPromptContentCacheKey(prompt.TenantID, prompt.ID),
+		defaultCacheTTL(),
+		loader,
+	)
+}
+
+func loadKolPromptContentUncached(
+	ctx context.Context,
+	promptRepo repository.KolPromptRepository,
+	asset *KolPromptAsset,
+	prompt *repository.KolPrompt,
+) (string, error) {
+	if prompt == nil {
+		return "", nil
+	}
+
+	if promptRepo != nil {
+		content, err := promptRepo.GetContentByID(ctx, prompt.TenantID, prompt.ID)
+		if err != nil {
+			return "", err
+		}
+		if content != nil && strings.TrimSpace(*content) != "" {
+			return *content, nil
+		}
+	}
+
+	if prompt.PromptContent != nil && strings.TrimSpace(*prompt.PromptContent) != "" {
+		return *prompt.PromptContent, nil
+	}
+
+	if prompt.PromptAssetKey == nil || strings.TrimSpace(*prompt.PromptAssetKey) == "" || asset == nil {
+		return "", nil
+	}
+
+	content, err := asset.Get(ctx, strings.TrimSpace(*prompt.PromptAssetKey))
+	if err != nil {
+		if errors.Is(err, objectstorage.ErrObjectNotFound) || errors.Is(err, objectstorage.ErrNotConfigured) {
+			return "", nil
+		}
+		return "", err
+	}
+	return content, nil
+}