chore: refactor

internal/handler/helpers.go

@@ -0,0 +1,49 @@
+package handler
+
+import (
+	"log/slog"
+
+	"git.juancwu.dev/juancwu/budgit/internal/service"
+)
+
+// processTagNames normalizes tag names, deduplicates them, and resolves them
+// to tag IDs. Tags that don't exist are auto-created.
+func processTagNames(tagService *service.TagService, spaceID string, tagNames []string) ([]string, error) {
+	existingTags, err := tagService.GetTagsForSpace(spaceID)
+	if err != nil {
+		return nil, err
+	}
+
+	existingTagsMap := make(map[string]string)
+	for _, t := range existingTags {
+		existingTagsMap[t.Name] = t.ID
+	}
+
+	var finalTagIDs []string
+	processedTags := make(map[string]bool)
+
+	for _, rawTagName := range tagNames {
+		tagName := service.NormalizeTagName(rawTagName)
+		if tagName == "" {
+			continue
+		}
+		if processedTags[tagName] {
+			continue
+		}
+
+		if id, exists := existingTagsMap[tagName]; exists {
+			finalTagIDs = append(finalTagIDs, id)
+		} else {
+			newTag, err := tagService.CreateTag(spaceID, tagName, nil)
+			if err != nil {
+				slog.Error("failed to create new tag", "error", err, "tag_name", tagName)
+				continue
+			}
+			finalTagIDs = append(finalTagIDs, newTag.ID)
+			existingTagsMap[tagName] = newTag.ID
+		}
+		processedTags[tagName] = true
+	}
+
+	return finalTagIDs, nil
+}