feat: storage, language rules and migration

internal/infrastructure/persistence/database/articleStoryBackfill.go

@@ -0,0 +1,43 @@
+package database
+
+import (
+	entity "RenewCMS/internal/infrastructure/persistence/models"
+
+	"gorm.io/gorm"
+)
+
+const (
+	articleStoriesMarker         = "article_stories"
+	articleStoryLanguageIndex    = "idx_articles_story_lang"
+	articleStoryLanguageIndexSQL = "CREATE UNIQUE INDEX idx_articles_story_lang ON articles (story_id, lang)"
+)
+
+func BackfillArticleStories(db *gorm.DB) error {
+	return db.Transaction(func(tx *gorm.DB) error {
+		applied, err := markerApplied(tx, articleStoriesMarker)
+		if err != nil || applied {
+			return err
+		}
+		var ids []uint32
+		if err := tx.Unscoped().Model(&entity.Article{}).Where("story_id = ?", 0).Order("id ASC").Pluck("id", &ids).Error; err != nil {
+			return err
+		}
+		for _, id := range ids {
+			story := entity.Story{}
+			if err := tx.Create(&story).Error; err != nil {
+				return err
+			}
+			if err := tx.Unscoped().Model(&entity.Article{}).Where("id = ?", id).UpdateColumn("story_id", story.ID).Error; err != nil {
+				return err
+			}
+		}
+		return applyMarker(tx, articleStoriesMarker)
+	})
+}
+
+func ensureArticleStoryLanguageIndex(db *gorm.DB) error {
+	if db.Migrator().HasIndex(&entity.Article{}, articleStoryLanguageIndex) {
+		return nil
+	}
+	return db.Exec(articleStoryLanguageIndexSQL).Error
+}