feat(note/search): added search by tag notes (#34)

cmd/main.go

@@ -38,6 +38,7 @@ func main() {
 	server.RegisterHandler("note/save", note.NewSaveNoteHandler(uow, noteRepo, tagService, noteService, linkService))
 	server.RegisterHandler("note/goto", note.NewGotoNoteHandler(noteRepo))
 	server.RegisterHandler("note/backlinks", note.NewGetBackLinksHandler(linkRepo, noteRepo))
+	server.RegisterHandler("note/search_by_tag", note.NewGetNotesByTagHandler(noteRepo))
 
 	server.RegisterHandler("completion/link", completion.NewCompleteLinkHandler(linkRepo))
 	server.RegisterHandler("completion/tag", completion.NewCompleteTagHandler(tagRepo))

core/handlers/note/get_notes_by_tag_handler.go

@@ -0,0 +1,33 @@
+package note
+
+import (
+	"context"
+	"encoding/json"
+
+	"github.com/KristianJBorgwarth/dendrite.daemon/persistence/repositories"
+)
+type getNotesByTagCommand struct {
+	Tag string `json:"tag"`
+}
+
+type GetNotesByTagHandler struct {
+	noteRepo repositories.INoteRepository
+}
+
+func NewGetNotesByTagHandler(noteRepo repositories.INoteRepository) *GetNotesByTagHandler {
+	return &GetNotesByTagHandler{noteRepo: noteRepo}
+}
+
+func (h *GetNotesByTagHandler) Handle(ctx context.Context, raw json.RawMessage) (any, error) {
+	var cmd getNotesByTagCommand
+	if err := json.Unmarshal(raw, &cmd); err != nil {
+		return nil, err
+	}
+
+	notes, err := h.noteRepo.GetByTag(ctx, cmd.Tag)
+	if err != nil {
+		return nil, err
+	}
+
+	return notes, nil
+}

persistence/repositories/note_repository.go

@@ -15,6 +15,7 @@ type INoteRepository interface {
 	Update(ctx context.Context, dbContext persistence.IDbContext, noteID, path, title, slug string) error
 	GetBySlug(ctx context.Context, slug string) (*models.Note, error)
 	GetByPath(ctx context.Context, path string) (*models.Note, error)
+	GetByTag(ctx context.Context, tag string) ([]*models.Note, error)
 	GetNoteCount(ctx context.Context) (int, error)
 }
 
@@ -97,7 +98,7 @@ func (r *noteRepository) GetByPath(ctx context.Context, path string) (*models.No
 		}
 		return nil, err
 	}
-	
+
 	return models.NewNote(id, path, title, slug, createdAt, updatedAt), nil
 }
 
@@ -113,3 +114,27 @@ func (r *noteRepository) GetNoteCount(ctx context.Context) (int, error) {
 
 	return count, nil
 }
+
+func (r *noteRepository) GetByTag(ctx context.Context, tag string) ([]*models.Note, error) {
+	rows, err := r.readDBContext.QueryContext(ctx, `
+	SELECT n.id, n.title, n.path, n.slug, n.created_at, n.updated_at
+	FROM note n
+	JOIN note_tag nt ON n.id = nt.note_id
+	JOIN tag t ON t.name = nt.tag_id
+	WHERE t.name LIKE ?`, "%"+tag+"%")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	notes := make([]*models.Note, 0)
+	for rows.Next() {
+		var id, title, path, slug, createdAt, updatedAt string
+		if err := rows.Scan(&id, &title, &path, &slug, &createdAt, &updatedAt); err != nil {
+			return nil, err
+		}
+		notes = append(notes, models.NewNote(id, path, title, slug, createdAt, updatedAt))
+	}
+
+	return notes, nil
+}