fix(tags): allow blur-only tag metadata (#5800)

Co-authored-by: memoclaw <265580040+memoclaw@users.noreply.github.com>

proto/api/v1/instance_service.proto

@@ -167,7 +167,8 @@ message InstanceSetting {
 
   // Metadata for a tag.
   message TagMetadata {
-    // Background color for the tag label.
+    // Optional background color for the tag label.
+    // When unset, the default tag color is used.
     google.type.Color background_color = 1;
     // Whether memos with this tag should have their content blurred.
     bool blur_content = 2;

proto/gen/api/v1/instance_service.pb.go

@@ -759,7 +759,8 @@ func (x *InstanceSetting_MemoRelatedSetting) GetReactions() []string {
 // Metadata for a tag.
 type InstanceSetting_TagMetadata struct {
 	state protoimpl.MessageState `protogen:"open.v1"`
-	// Background color for the tag label.
+	// Optional background color for the tag label.
+	// When unset, the default tag color is used.
 	BackgroundColor *color.Color `protobuf:"bytes,1,opt,name=background_color,json=backgroundColor,proto3" json:"background_color,omitempty"`
 	// Whether memos with this tag should have their content blurred.
 	BlurContent   bool `protobuf:"varint,2,opt,name=blur_content,json=blurContent,proto3" json:"blur_content,omitempty"`

proto/gen/openapi.yaml

@@ -2396,7 +2396,9 @@ components:
                 backgroundColor:
                     allOf:
                         - $ref: '#/components/schemas/Color'
-                    description: Background color for the tag label.
+                    description: |-
+                        Optional background color for the tag label.
+                         When unset, the default tag color is used.
                 blurContent:
                     type: boolean
                     description: Whether memos with this tag should have their content blurred.

proto/gen/store/instance_setting.pb.go

@@ -754,7 +754,8 @@ func (x *InstanceMemoRelatedSetting) GetReactions() []string {
 
 type InstanceTagMetadata struct {
 	state protoimpl.MessageState `protogen:"open.v1"`
-	// Background color for the tag label.
+	// Optional background color for the tag label.
+	// When unset, the default tag color is used.
 	BackgroundColor *color.Color `protobuf:"bytes,1,opt,name=background_color,json=backgroundColor,proto3" json:"background_color,omitempty"`
 	// Whether memos with this tag should have their content blurred.
 	BlurContent   bool `protobuf:"varint,2,opt,name=blur_content,json=blurContent,proto3" json:"blur_content,omitempty"`

proto/store/instance_setting.proto

@@ -111,7 +111,8 @@ message InstanceMemoRelatedSetting {
 }
 
 message InstanceTagMetadata {
-  // Background color for the tag label.
+  // Optional background color for the tag label.
+  // When unset, the default tag color is used.
   google.type.Color background_color = 1;
   // Whether memos with this tag should have their content blurred.
   bool blur_content = 2;

server/router/api/v1/instance_service.go

@@ -423,11 +423,10 @@ func validateInstanceTagsSetting(setting *v1pb.InstanceSetting_TagsSetting) erro
 		if metadata == nil {
 			return errors.Errorf("tag metadata is required for %q", tag)
 		}
-		if metadata.GetBackgroundColor() == nil {
+		if metadata.GetBackgroundColor() != nil {
-			return errors.Errorf("background_color is required for %q", tag)
+			if err := validateInstanceColor(metadata.GetBackgroundColor()); err != nil {
-		}
+				return errors.Wrapf(err, "background_color for %q", tag)
-		if err := validateInstanceColor(metadata.GetBackgroundColor()); err != nil {
+			}
-			return errors.Wrapf(err, "background_color for %q", tag)
 		}
 	}
 	return nil

server/router/api/v1/test/instance_service_test.go

@@ -318,6 +318,34 @@ func TestUpdateInstanceSetting(t *testing.T) {
 		require.Contains(t, err.Error(), "invalid instance setting")
 	})
 
+	t.Run("UpdateInstanceSetting - tags setting without color", func(t *testing.T) {
+		ts := NewTestService(t)
+		defer ts.Cleanup()
+
+		hostUser, err := ts.CreateHostUser(ctx, "admin")
+		require.NoError(t, err)
+
+		resp, err := ts.Service.UpdateInstanceSetting(ts.CreateUserContext(ctx, hostUser.ID), &v1pb.UpdateInstanceSettingRequest{
+			Setting: &v1pb.InstanceSetting{
+				Name: "instance/settings/TAGS",
+				Value: &v1pb.InstanceSetting_TagsSetting_{
+					TagsSetting: &v1pb.InstanceSetting_TagsSetting{
+						Tags: map[string]*v1pb.InstanceSetting_TagMetadata{
+							"spoiler": {
+								BlurContent: true,
+							},
+						},
+					},
+				},
+			},
+		})
+		require.NoError(t, err)
+		require.NotNil(t, resp.GetTagsSetting())
+		require.Contains(t, resp.GetTagsSetting().GetTags(), "spoiler")
+		require.Nil(t, resp.GetTagsSetting().GetTags()["spoiler"].GetBackgroundColor())
+		require.True(t, resp.GetTagsSetting().GetTags()["spoiler"].GetBlurContent())
+	})
+
 	t.Run("UpdateInstanceSetting - notification setting password is write-only", func(t *testing.T) {
 		ts := NewTestService(t)
 		defer ts.Cleanup()

store/test/instance_setting_test.go

@@ -257,6 +257,34 @@ func TestInstanceSettingTagsSetting(t *testing.T) {
 	ts.Close()
 }
 
+func TestInstanceSettingTagsSettingWithoutColor(t *testing.T) {
+	t.Parallel()
+	ctx := context.Background()
+	ts := NewTestingStore(ctx, t)
+
+	_, err := ts.UpsertInstanceSetting(ctx, &storepb.InstanceSetting{
+		Key: storepb.InstanceSettingKey_TAGS,
+		Value: &storepb.InstanceSetting_TagsSetting{
+			TagsSetting: &storepb.InstanceTagsSetting{
+				Tags: map[string]*storepb.InstanceTagMetadata{
+					"spoiler": {
+						BlurContent: true,
+					},
+				},
+			},
+		},
+	})
+	require.NoError(t, err)
+
+	tagsSetting, err := ts.GetInstanceTagsSetting(ctx)
+	require.NoError(t, err)
+	require.Contains(t, tagsSetting.Tags, "spoiler")
+	require.Nil(t, tagsSetting.Tags["spoiler"].GetBackgroundColor())
+	require.True(t, tagsSetting.Tags["spoiler"].GetBlurContent())
+
+	ts.Close()
+}
+
 func TestInstanceSettingNotificationSetting(t *testing.T) {
 	t.Parallel()
 	ctx := context.Background()

web/src/components/Settings/TagsSection.tsx

@@ -22,8 +22,7 @@ import SettingGroup from "./SettingGroup";
 import SettingSection from "./SettingSection";
 import SettingTable from "./SettingTable";
 
-// Fallback to white when no color is stored.
+const DEFAULT_TAG_COLOR = "#ffffff";
-const tagColorToHex = (color?: { red?: number; green?: number; blue?: number }): string => colorToHex(color) ?? "#ffffff";
 
 // Converts a CSS hex string to a google.type.Color message.
 const hexToColor = (hex: string) =>
@@ -34,10 +33,18 @@ const hexToColor = (hex: string) =>
   });
 
 interface LocalTagMeta {
-  color: string;
+  color?: string;
   blur: boolean;
 }
 
+const toLocalTagMeta = (meta: {
+  backgroundColor?: { red?: number; green?: number; blue?: number };
+  blurContent: boolean;
+}): LocalTagMeta => ({
+  color: colorToHex(meta.backgroundColor),
+  blur: meta.blurContent,
+});
+
 const TagsSection = () => {
   const t = useTranslate();
   const { tagsSetting: originalSetting, updateSetting, fetchSetting } = useInstance();
@@ -45,28 +52,16 @@ const TagsSection = () => {
 
   // Local state: map of tagName → { color, blur } for editing.
   const [localTags, setLocalTags] = useState<Record<string, LocalTagMeta>>(() =>
-    Object.fromEntries(
+    Object.fromEntries(Object.entries(originalSetting.tags).map(([name, meta]) => [name, toLocalTagMeta(meta)])),
-      Object.entries(originalSetting.tags).map(([name, meta]) => [
-        name,
-        { color: tagColorToHex(meta.backgroundColor), blur: meta.blurContent },
-      ]),
-    ),
   );
   const [newTagName, setNewTagName] = useState("");
-  const [newTagColor, setNewTagColor] = useState("#ffffff");
+  const [newTagColor, setNewTagColor] = useState<string | undefined>(undefined);
   const [newTagBlur, setNewTagBlur] = useState(false);
 
   // Sync local state when the fetched setting arrives (the fetch is async and
   // completes after mount, so localTags would be empty without this sync).
   useEffect(() => {
-    setLocalTags(
+    setLocalTags(Object.fromEntries(Object.entries(originalSetting.tags).map(([name, meta]) => [name, toLocalTagMeta(meta)])));
-      Object.fromEntries(
-        Object.entries(originalSetting.tags).map(([name, meta]) => [
-          name,
-          { color: tagColorToHex(meta.backgroundColor), blur: meta.blurContent },
-        ]),
-      ),
-    );
   }, [originalSetting.tags]);
 
   // All known tag names: union of saved entries and tags used in memos.
@@ -85,13 +80,7 @@ const TagsSection = () => {
   );
 
   const originalMetaMap = useMemo(
-    () =>
+    () => Object.fromEntries(Object.entries(originalSetting.tags).map(([name, meta]) => [name, toLocalTagMeta(meta)])),
-      Object.fromEntries(
-        Object.entries(originalSetting.tags).map(([name, meta]) => [
-          name,
-          { color: tagColorToHex(meta.backgroundColor), blur: meta.blurContent },
-        ]),
-      ),
     [originalSetting.tags],
   );
   const hasChanges = !isEqual(localTags, originalMetaMap);
@@ -104,6 +93,10 @@ const TagsSection = () => {
     setLocalTags((prev) => ({ ...prev, [tagName]: { ...prev[tagName], blur } }));
   };
 
+  const handleClearColor = (tagName: string) => {
+    setLocalTags((prev) => ({ ...prev, [tagName]: { ...prev[tagName], color: undefined } }));
+  };
+
   const handleRemoveTag = (tagName: string) => {
     setLocalTags((prev) => {
       const next = { ...prev };
@@ -125,7 +118,7 @@ const TagsSection = () => {
     }
     setLocalTags((prev) => ({ ...prev, [name]: { color: newTagColor, blur: newTagBlur } }));
     setNewTagName("");
-    setNewTagColor("#ffffff");
+    setNewTagColor(undefined);
     setNewTagBlur(false);
   };
 
@@ -134,7 +127,10 @@ const TagsSection = () => {
       const tags = Object.fromEntries(
         Object.entries(localTags).map(([name, meta]) => [
           name,
-          create(InstanceSetting_TagMetadataSchema, { backgroundColor: hexToColor(meta.color), blurContent: meta.blur }),
+          create(InstanceSetting_TagMetadataSchema, {
+            blurContent: meta.blur,
+            ...(meta.color ? { backgroundColor: hexToColor(meta.color) } : {}),
+          }),
         ]),
       );
       await updateSetting(
@@ -171,9 +167,15 @@ const TagsSection = () => {
                   <input
                     type="color"
                     className="w-8 h-8 cursor-pointer rounded border border-border bg-transparent p-0.5"
-                    value={localTags[row.name].color}
+                    value={localTags[row.name].color ?? DEFAULT_TAG_COLOR}
                     onChange={(e) => handleColorChange(row.name, e.target.value)}
                   />
+                  <Button variant="ghost" size="sm" onClick={() => handleClearColor(row.name)} disabled={!localTags[row.name].color}>
+                    {t("common.clear")}
+                  </Button>
+                  {!localTags[row.name].color && (
+                    <span className="text-xs text-muted-foreground">{t("setting.tags.using-default-color")}</span>
+                  )}
                 </div>
               ),
             },
@@ -224,9 +226,12 @@ const TagsSection = () => {
           <input
             type="color"
             className="w-8 h-8 cursor-pointer rounded border border-border bg-transparent p-0.5"
-            value={newTagColor}
+            value={newTagColor ?? DEFAULT_TAG_COLOR}
             onChange={(e) => setNewTagColor(e.target.value)}
           />
+          <Button variant="ghost" size="sm" onClick={() => setNewTagColor(undefined)} disabled={!newTagColor}>
+            {t("common.clear")}
+          </Button>
           <label className="flex items-center gap-1.5 text-sm text-muted-foreground">
             <input
               type="checkbox"
@@ -242,6 +247,7 @@ const TagsSection = () => {
           </Button>
         </div>
         <p className="text-xs text-muted-foreground mt-1">{t("setting.tags.tag-pattern-hint")}</p>
+        {!newTagColor && <p className="text-xs text-muted-foreground">{t("setting.tags.using-default-color")}</p>}
       </SettingGroup>
 
       <div className="w-full flex justify-end">

web/src/locales/en.json

@@ -475,7 +475,7 @@
     "tags": {
       "label": "Tags",
       "title": "Tag metadata",
-      "description": "Assign display colors to tags instance-wide. Tag names are treated as anchored regex patterns.",
+      "description": "Assign optional display colors to tags instance-wide, or blur matching memo content. Tag names are treated as anchored regex patterns.",
       "background-color": "Background color",
       "blur-content": "Blur content",
       "no-tags-configured": "No tag metadata configured.",
@@ -483,7 +483,8 @@
       "tag-name-placeholder": "e.g. work or project/.*",
       "tag-already-exists": "Tag already exists.",
       "tag-pattern-hint": "Tag name or regex pattern (e.g. project/.* matches all project/ tags)",
-      "invalid-regex": "Invalid or unsafe regex pattern."
+      "invalid-regex": "Invalid or unsafe regex pattern.",
+      "using-default-color": "Using default color."
     }
   },
   "tag": {

web/src/types/proto/api/v1/instance_service_pb.ts

@@ -414,7 +414,8 @@ export const InstanceSetting_MemoRelatedSettingSchema: GenMessage<InstanceSettin
  */
 export type InstanceSetting_TagMetadata = Message<"memos.api.v1.InstanceSetting.TagMetadata"> & {
   /**
-   * Background color for the tag label.
+   * Optional background color for the tag label.
+   * When unset, the default tag color is used.
    *
    * @generated from field: google.type.Color background_color = 1;
    */