start working on multiple tag names for tag timeline

internal/api/client/timelines/tag.go

@@ -125,10 +125,17 @@ func (m *Module) TagTimelineGETHandler(c *gin.Context) {
 		return
 	}
 
+	// Append any additional tags
+	// passed as `any[]` parameter.
+	tagNames := append(
+		[]string{tagName},
+		c.QueryArray(apiutil.TagAnyKey)...,
+	)
+
 	resp, errWithCode := m.processor.Timeline().TagTimelineGet(
 		c.Request.Context(),
 		authed.Account,
-		tagName,
+		tagNames,
 		c.Query(apiutil.MaxIDKey),
 		c.Query(apiutil.SinceIDKey),
 		c.Query(apiutil.MinIDKey),

internal/api/util/parsequery.go

@@ -54,6 +54,7 @@
 	/* Tag keys */
 
 	TagNameKey = "tag_name"
+	TagAnyKey  = "any[]"
 
 	/* Web endpoint keys */
 

internal/db/bundb/timeline.go

@@ -463,7 +463,7 @@ func (t *timelineDB) GetListTimeline(
 
 func (t *timelineDB) GetTagTimeline(
 	ctx context.Context,
-	tagID string,
+	tagIDs []string,
 	maxID string,
 	sinceID string,
 	minID string,
@@ -492,8 +492,8 @@ func (t *timelineDB) GetTagTimeline(
 		).
 		// Public only.
 		Where("? = ?", bun.Ident("status.visibility"), gtsmodel.VisibilityPublic).
-		// This tag only.
-		Where("? = ?", bun.Ident("status_to_tag.tag_id"), tagID)
+		// Provided tag IDs only.
+		Where("? IN (?)", bun.Ident("status_to_tag.tag_id"), bun.In(tagIDs))
 
 	if maxID == "" || maxID >= id.Highest {
 		const future = 24 * time.Hour

internal/db/bundb/timeline_test.go

@@ -311,7 +311,7 @@ func (suite *TimelineTestSuite) TestGetTagTimelineNoParams() {
 		tag = suite.testTags["welcome"]
 	)
 
-	s, err := suite.db.GetTagTimeline(ctx, tag.ID, "", "", "", 1)
+	s, err := suite.db.GetTagTimeline(ctx, []string{tag.ID}, "", "", "", 1)
 	if err != nil {
 		suite.FailNow(err.Error())
 	}

internal/db/timeline.go

@@ -49,7 +49,7 @@ type Timeline interface {
 	// Statuses should be returned in descending order of when they were created (newest first).
 	GetListTimeline(ctx context.Context, listID string, maxID string, sinceID string, minID string, limit int) ([]*gtsmodel.Status, error)
 
-	// GetTagTimeline returns a slice of public-visibility statuses that use the given tagID.
+	// GetTagTimeline returns a slice of public-visibility statuses that use the given tagIDs.
 	// Statuses should be returned in descending order of when they were created (newest first).
-	GetTagTimeline(ctx context.Context, tagID string, maxID string, sinceID string, minID string, limit int) ([]*gtsmodel.Status, error)
+	GetTagTimeline(ctx context.Context, tagIDs []string, maxID string, sinceID string, minID string, limit int) ([]*gtsmodel.Status, error)
 }

internal/processing/timeline/tag.go

@@ -32,30 +32,35 @@
 )
 
 // TagTimelineGet gets a pageable timeline for the given
-// tagName and given paging parameters. It will ensure
+// tagNames and given paging parameters. It will ensure
 // that each status in the timeline is actually visible
 // to requestingAcct before returning it.
 func (p *Processor) TagTimelineGet(
 	ctx context.Context,
 	requestingAcct *gtsmodel.Account,
-	tagName string,
+	tagNames []string,
 	maxID string,
 	sinceID string,
 	minID string,
 	limit int,
 ) (*apimodel.PageableResponse, gtserror.WithCode) {
-	tag, errWithCode := p.getTag(ctx, tagName)
-	if errWithCode != nil {
-		return nil, errWithCode
+	tagIDs := make([]string, 0, len(tagNames))
+	for _, tagName := range tagNames {
+		tag, errWithCode := p.getTag(ctx, tagName)
+		if errWithCode != nil {
+			return nil, errWithCode
+		}
+
+		if tag == nil || !*tag.Useable || !*tag.Listable {
+			// Obey mastodon API by returning 404 for this.
+			err := fmt.Errorf("tag was not found, or not useable/listable on this instance")
+			return nil, gtserror.NewErrorNotFound(err, err.Error())
+		}
+
+		tagIDs = append(tagIDs, tag.ID)
 	}
 
-	if tag == nil || !*tag.Useable || !*tag.Listable {
-		// Obey mastodon API by returning 404 for this.
-		err := fmt.Errorf("tag was not found, or not useable/listable on this instance")
-		return nil, gtserror.NewErrorNotFound(err, err.Error())
-	}
-
-	statuses, err := p.state.DB.GetTagTimeline(ctx, tag.ID, maxID, sinceID, minID, limit)
+	statuses, err := p.state.DB.GetTagTimeline(ctx, tagIDs, maxID, sinceID, minID, limit)
 	if err != nil && !errors.Is(err, db.ErrNoEntries) {
 		err = gtserror.Newf("db error getting statuses: %w", err)
 		return nil, gtserror.NewErrorInternalError(err)
@@ -66,8 +71,7 @@ func (p *Processor) TagTimelineGet(
 		requestingAcct,
 		statuses,
 		limit,
-		// Use API URL for tag.
-		"/api/v1/timelines/tag/"+tagName,
+		tagNames,
 	)
 }
 
@@ -95,7 +99,7 @@ func (p *Processor) packageTagResponse(
 	requestingAcct *gtsmodel.Account,
 	statuses []*gtsmodel.Status,
 	limit int,
-	requestPath string,
+	tagNames []string,
 ) (*apimodel.PageableResponse, gtserror.WithCode) {
 	count := len(statuses)
 	if count == 0 {
@@ -131,11 +135,23 @@ func (p *Processor) packageTagResponse(
 		items = append(items, apiStatus)
 	}
 
+	// Use first / "primary" tag for API endpoint.
+	path := "/api/v1/timelines/tag/" + tagNames[0]
+
+	// Add any additional tags.
+	var extraQueryParams []string
+	if len(tagNames) > 1 {
+		for _, tagName := range tagNames[1:] {
+			extraQueryParams = append(extraQueryParams, "any[]="+tagName)
+		}
+	}
+
 	return util.PackagePageableResponse(util.PageableResponseParams{
-		Items:          items,
-		Path:           requestPath,
-		NextMaxIDValue: nextMaxIDValue,
-		PrevMinIDValue: prevMinIDValue,
-		Limit:          limit,
+		Items:            items,
+		Path:             path,
+		NextMaxIDValue:   nextMaxIDValue,
+		PrevMinIDValue:   prevMinIDValue,
+		Limit:            limit,
+		ExtraQueryParams: extraQueryParams,
 	})
 }