gugus
bb402d4ccc
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600 lines
18 KiB
Go
600 lines
18 KiB
Go
package mcp
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import (
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"context"
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"encoding/json"
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"fmt"
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"regexp"
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"strings"
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"github.com/lithammer/shortuuid/v4"
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"github.com/mark3labs/mcp-go/mcp"
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mcpserver "github.com/mark3labs/mcp-go/server"
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"github.com/pkg/errors"
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storepb "github.com/usememos/memos/proto/gen/store"
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"github.com/usememos/memos/server/auth"
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"github.com/usememos/memos/store"
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)
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// tagRegexp matches #tag patterns in memo content.
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// A tag must start with a letter and contain no whitespace or # characters.
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var tagRegexp = regexp.MustCompile(`(?:^|\s)#([A-Za-z][^\s#]*)`)
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// extractTags does a best-effort extraction of #tags from raw markdown content.
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// It is used when creating or updating memos via MCP to pre-populate Payload.Tags.
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// The full markdown service may later rebuild a more accurate payload.
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func extractTags(content string) []string {
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matches := tagRegexp.FindAllStringSubmatch(content, -1)
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seen := make(map[string]struct{}, len(matches))
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tags := make([]string, 0, len(matches))
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for _, m := range matches {
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tag := m[1]
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if _, ok := seen[tag]; !ok {
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seen[tag] = struct{}{}
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tags = append(tags, tag)
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}
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}
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return tags
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}
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// buildPayload constructs a MemoPayload with tags extracted from content.
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// Returns nil when no tags are found so the store omits the payload entirely.
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func buildPayload(content string) *storepb.MemoPayload {
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tags := extractTags(content)
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if len(tags) == 0 {
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return nil
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}
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return &storepb.MemoPayload{Tags: tags}
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}
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// propertyJSON is the serialisable form of MemoPayload.Property.
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type propertyJSON struct {
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HasLink bool `json:"has_link"`
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HasTaskList bool `json:"has_task_list"`
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HasCode bool `json:"has_code"`
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HasIncompleteTasks bool `json:"has_incomplete_tasks"`
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}
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// memoJSON is the canonical response shape for all MCP memo results.
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// It serialises correctly with standard encoding/json (no proto marshalling needed).
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type memoJSON struct {
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Name string `json:"name"`
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Creator string `json:"creator"`
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CreateTime int64 `json:"create_time"`
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UpdateTime int64 `json:"update_time"`
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Content string `json:"content,omitempty"`
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Visibility string `json:"visibility"`
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Tags []string `json:"tags"`
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Pinned bool `json:"pinned"`
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State string `json:"state"`
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Property *propertyJSON `json:"property,omitempty"`
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Parent string `json:"parent,omitempty"`
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}
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func storeMemoToJSON(m *store.Memo) memoJSON {
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j := memoJSON{
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Name: "memos/" + m.UID,
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Creator: fmt.Sprintf("users/%d", m.CreatorID),
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CreateTime: m.CreatedTs,
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UpdateTime: m.UpdatedTs,
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Content: m.Content,
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Visibility: string(m.Visibility),
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Pinned: m.Pinned,
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State: string(m.RowStatus),
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Tags: []string{},
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}
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if m.Payload != nil {
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if len(m.Payload.Tags) > 0 {
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j.Tags = m.Payload.Tags
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}
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if p := m.Payload.Property; p != nil && (p.HasLink || p.HasTaskList || p.HasCode || p.HasIncompleteTasks) {
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j.Property = &propertyJSON{
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HasLink: p.HasLink,
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HasTaskList: p.HasTaskList,
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HasCode: p.HasCode,
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HasIncompleteTasks: p.HasIncompleteTasks,
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}
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}
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}
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if m.ParentUID != nil {
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j.Parent = "memos/" + *m.ParentUID
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}
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return j
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}
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// checkMemoAccess returns an error if the caller cannot read memo.
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// userID == 0 means anonymous.
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func checkMemoAccess(memo *store.Memo, userID int32) error {
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switch memo.Visibility {
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case store.Protected:
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if userID == 0 {
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return errors.New("permission denied")
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}
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case store.Private:
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if memo.CreatorID != userID {
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return errors.New("permission denied")
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}
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default:
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// store.Public and any unknown visibility: allow
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}
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return nil
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}
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// applyVisibilityFilter restricts find to memos the caller may see.
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func applyVisibilityFilter(find *store.FindMemo, userID int32) {
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if userID == 0 {
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find.VisibilityList = []store.Visibility{store.Public}
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} else {
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find.Filters = append(find.Filters, fmt.Sprintf(`creator_id == %d || visibility in ["PUBLIC", "PROTECTED"]`, userID))
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}
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}
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// parseMemoUID extracts the UID from a "memos/<uid>" resource name.
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func parseMemoUID(name string) (string, error) {
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uid, ok := strings.CutPrefix(name, "memos/")
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if !ok || uid == "" {
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return "", errors.Errorf(`memo name must be in the format "memos/<uid>", got %q`, name)
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}
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return uid, nil
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}
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// parseVisibility validates a visibility string and returns the store constant.
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func parseVisibility(s string) (store.Visibility, error) {
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switch v := store.Visibility(s); v {
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case store.Public, store.Protected, store.Private:
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return v, nil
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default:
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return "", errors.Errorf("visibility must be PRIVATE, PROTECTED, or PUBLIC; got %q", s)
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}
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}
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// parseRowStatus validates a state string and returns the store constant.
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func parseRowStatus(s string) (store.RowStatus, error) {
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switch rs := store.RowStatus(s); rs {
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case store.Normal, store.Archived:
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return rs, nil
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default:
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return "", errors.Errorf("state must be NORMAL or ARCHIVED; got %q", s)
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}
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}
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func extractUserID(ctx context.Context) (int32, error) {
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id := auth.GetUserID(ctx)
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if id == 0 {
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return 0, errors.New("unauthenticated: a personal access token is required")
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}
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return id, nil
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}
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func marshalJSON(v any) (string, error) {
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b, err := json.Marshal(v)
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if err != nil {
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return "", err
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}
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return string(b), nil
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}
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func (s *MCPService) registerMemoTools(mcpSrv *mcpserver.MCPServer) {
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mcpSrv.AddTool(mcp.NewTool("list_memos",
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mcp.WithDescription("List memos visible to the caller. Authenticated users see their own memos plus public and protected memos; unauthenticated callers see only public memos."),
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mcp.WithNumber("page_size", mcp.Description("Maximum memos to return (1–100, default 20)")),
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mcp.WithNumber("page", mcp.Description("Zero-based page index for pagination (default 0)")),
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mcp.WithString("state",
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mcp.Enum("NORMAL", "ARCHIVED"),
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mcp.Description("Filter by state: NORMAL (default) or ARCHIVED"),
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),
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mcp.WithBoolean("order_by_pinned", mcp.Description("When true, pinned memos appear first (default false)")),
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mcp.WithString("filter", mcp.Description(`Optional CEL filter, e.g. content.contains("keyword") or tags.exists(t, t == "work")`)),
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), s.handleListMemos)
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mcpSrv.AddTool(mcp.NewTool("get_memo",
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mcp.WithDescription("Get a single memo by resource name. Public memos are accessible without authentication."),
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mcp.WithString("name", mcp.Required(), mcp.Description(`Memo resource name, e.g. "memos/abc123"`)),
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), s.handleGetMemo)
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mcpSrv.AddTool(mcp.NewTool("create_memo",
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mcp.WithDescription("Create a new memo. Requires authentication."),
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mcp.WithString("content", mcp.Required(), mcp.Description("Memo content in Markdown. Use #tag syntax for tagging.")),
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mcp.WithString("visibility",
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mcp.Enum("PRIVATE", "PROTECTED", "PUBLIC"),
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mcp.Description("Visibility (default: PRIVATE)"),
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),
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), s.handleCreateMemo)
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mcpSrv.AddTool(mcp.NewTool("update_memo",
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mcp.WithDescription("Update a memo's content, visibility, pin state, or archive state. Requires authentication and ownership. Omit any field to leave it unchanged."),
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mcp.WithString("name", mcp.Required(), mcp.Description(`Memo resource name, e.g. "memos/abc123"`)),
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mcp.WithString("content", mcp.Description("New Markdown content")),
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mcp.WithString("visibility",
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mcp.Enum("PRIVATE", "PROTECTED", "PUBLIC"),
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mcp.Description("New visibility"),
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),
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mcp.WithBoolean("pinned", mcp.Description("Pin or unpin the memo")),
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mcp.WithString("state",
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mcp.Enum("NORMAL", "ARCHIVED"),
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mcp.Description("Set to ARCHIVED to archive, NORMAL to restore"),
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),
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), s.handleUpdateMemo)
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mcpSrv.AddTool(mcp.NewTool("delete_memo",
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mcp.WithDescription("Permanently delete a memo. Requires authentication and ownership."),
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mcp.WithString("name", mcp.Required(), mcp.Description(`Memo resource name, e.g. "memos/abc123"`)),
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), s.handleDeleteMemo)
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mcpSrv.AddTool(mcp.NewTool("search_memos",
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mcp.WithDescription("Search memo content. Authenticated users search their own and visible memos; unauthenticated callers search public memos only."),
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mcp.WithString("query", mcp.Required(), mcp.Description("Text to search for in memo content")),
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), s.handleSearchMemos)
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mcpSrv.AddTool(mcp.NewTool("list_memo_comments",
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mcp.WithDescription("List comments on a memo. Visibility rules for comments match those of the parent memo."),
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mcp.WithString("name", mcp.Required(), mcp.Description(`Memo resource name, e.g. "memos/abc123"`)),
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), s.handleListMemoComments)
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mcpSrv.AddTool(mcp.NewTool("create_memo_comment",
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mcp.WithDescription("Add a comment to a memo. The comment inherits the parent memo's visibility. Requires authentication."),
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mcp.WithString("name", mcp.Required(), mcp.Description(`Memo resource name to comment on, e.g. "memos/abc123"`)),
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mcp.WithString("content", mcp.Required(), mcp.Description("Comment content in Markdown")),
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), s.handleCreateMemoComment)
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}
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func (s *MCPService) handleListMemos(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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userID := auth.GetUserID(ctx)
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pageSize := req.GetInt("page_size", 20)
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if pageSize <= 0 {
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pageSize = 20
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}
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if pageSize > 100 {
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pageSize = 100
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}
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page := req.GetInt("page", 0)
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if page < 0 {
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page = 0
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}
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var rowStatus *store.RowStatus
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if state := req.GetString("state", "NORMAL"); state != "" {
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rs, err := parseRowStatus(state)
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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rowStatus = &rs
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}
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limit := pageSize + 1
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offset := page * pageSize
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find := &store.FindMemo{
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ExcludeComments: true,
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RowStatus: rowStatus,
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Limit: &limit,
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Offset: &offset,
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OrderByPinned: req.GetBool("order_by_pinned", false),
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}
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applyVisibilityFilter(find, userID)
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if filter := req.GetString("filter", ""); filter != "" {
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find.Filters = append(find.Filters, filter)
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}
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memos, err := s.store.ListMemos(ctx, find)
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if err != nil {
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return mcp.NewToolResultError(fmt.Sprintf("failed to list memos: %v", err)), nil
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}
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hasMore := len(memos) > pageSize
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if hasMore {
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memos = memos[:pageSize]
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}
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results := make([]memoJSON, len(memos))
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for i, m := range memos {
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results[i] = storeMemoToJSON(m)
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}
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type listResponse struct {
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Memos []memoJSON `json:"memos"`
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HasMore bool `json:"has_more"`
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}
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out, err := marshalJSON(listResponse{Memos: results, HasMore: hasMore})
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if err != nil {
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return nil, err
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}
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return mcp.NewToolResultText(out), nil
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}
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func (s *MCPService) handleGetMemo(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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userID := auth.GetUserID(ctx)
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uid, err := parseMemoUID(req.GetString("name", ""))
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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memo, err := s.store.GetMemo(ctx, &store.FindMemo{UID: &uid})
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if err != nil {
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return mcp.NewToolResultError(fmt.Sprintf("failed to get memo: %v", err)), nil
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}
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if memo == nil {
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return mcp.NewToolResultError("memo not found"), nil
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}
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if err := checkMemoAccess(memo, userID); err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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out, err := marshalJSON(storeMemoToJSON(memo))
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if err != nil {
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return nil, err
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}
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return mcp.NewToolResultText(out), nil
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}
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func (s *MCPService) handleCreateMemo(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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userID, err := extractUserID(ctx)
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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content := req.GetString("content", "")
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if content == "" {
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return mcp.NewToolResultError("content is required"), nil
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}
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visibility, err := parseVisibility(req.GetString("visibility", "PRIVATE"))
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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memo, err := s.store.CreateMemo(ctx, &store.Memo{
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UID: shortuuid.New(),
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CreatorID: userID,
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Content: content,
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Visibility: visibility,
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Payload: buildPayload(content),
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})
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if err != nil {
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return mcp.NewToolResultError(fmt.Sprintf("failed to create memo: %v", err)), nil
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}
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out, err := marshalJSON(storeMemoToJSON(memo))
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if err != nil {
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return nil, err
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}
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return mcp.NewToolResultText(out), nil
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}
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func (s *MCPService) handleUpdateMemo(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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userID, err := extractUserID(ctx)
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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uid, err := parseMemoUID(req.GetString("name", ""))
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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memo, err := s.store.GetMemo(ctx, &store.FindMemo{UID: &uid})
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if err != nil {
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return mcp.NewToolResultError(fmt.Sprintf("failed to get memo: %v", err)), nil
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}
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if memo == nil {
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return mcp.NewToolResultError("memo not found"), nil
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}
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if memo.CreatorID != userID {
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return mcp.NewToolResultError("permission denied"), nil
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}
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update := &store.UpdateMemo{ID: memo.ID}
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args := req.GetArguments()
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if v := req.GetString("content", ""); v != "" {
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update.Content = &v
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update.Payload = buildPayload(v)
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}
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if v := req.GetString("visibility", ""); v != "" {
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vis, err := parseVisibility(v)
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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update.Visibility = &vis
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}
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if v := req.GetString("state", ""); v != "" {
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rs, err := parseRowStatus(v)
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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update.RowStatus = &rs
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}
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if _, ok := args["pinned"]; ok {
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pinned := req.GetBool("pinned", false)
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update.Pinned = &pinned
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}
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if err := s.store.UpdateMemo(ctx, update); err != nil {
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return mcp.NewToolResultError(fmt.Sprintf("failed to update memo: %v", err)), nil
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}
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updated, err := s.store.GetMemo(ctx, &store.FindMemo{ID: &memo.ID})
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if err != nil {
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return mcp.NewToolResultError(fmt.Sprintf("failed to fetch updated memo: %v", err)), nil
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}
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out, err := marshalJSON(storeMemoToJSON(updated))
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if err != nil {
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return nil, err
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}
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return mcp.NewToolResultText(out), nil
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}
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func (s *MCPService) handleDeleteMemo(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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userID, err := extractUserID(ctx)
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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uid, err := parseMemoUID(req.GetString("name", ""))
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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memo, err := s.store.GetMemo(ctx, &store.FindMemo{UID: &uid})
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if err != nil {
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return mcp.NewToolResultError(fmt.Sprintf("failed to get memo: %v", err)), nil
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}
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if memo == nil {
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return mcp.NewToolResultError("memo not found"), nil
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}
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if memo.CreatorID != userID {
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return mcp.NewToolResultError("permission denied"), nil
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}
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if err := s.store.DeleteMemo(ctx, &store.DeleteMemo{ID: memo.ID}); err != nil {
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return mcp.NewToolResultError(fmt.Sprintf("failed to delete memo: %v", err)), nil
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}
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return mcp.NewToolResultText(`{"deleted":true}`), nil
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}
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func (s *MCPService) handleSearchMemos(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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userID := auth.GetUserID(ctx)
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query := req.GetString("query", "")
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if query == "" {
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return mcp.NewToolResultError("query is required"), nil
|
||
}
|
||
|
||
limit := 50
|
||
zero := 0
|
||
rowStatus := store.Normal
|
||
find := &store.FindMemo{
|
||
ExcludeComments: true,
|
||
RowStatus: &rowStatus,
|
||
Limit: &limit,
|
||
Offset: &zero,
|
||
Filters: []string{fmt.Sprintf(`content.contains(%q)`, query)},
|
||
}
|
||
applyVisibilityFilter(find, userID)
|
||
|
||
memos, err := s.store.ListMemos(ctx, find)
|
||
if err != nil {
|
||
return mcp.NewToolResultError(fmt.Sprintf("failed to search memos: %v", err)), nil
|
||
}
|
||
|
||
results := make([]memoJSON, len(memos))
|
||
for i, m := range memos {
|
||
results[i] = storeMemoToJSON(m)
|
||
}
|
||
out, err := marshalJSON(results)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
return mcp.NewToolResultText(out), nil
|
||
}
|
||
|
||
func (s *MCPService) handleListMemoComments(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
|
||
userID := auth.GetUserID(ctx)
|
||
|
||
uid, err := parseMemoUID(req.GetString("name", ""))
|
||
if err != nil {
|
||
return mcp.NewToolResultError(err.Error()), nil
|
||
}
|
||
|
||
parent, err := s.store.GetMemo(ctx, &store.FindMemo{UID: &uid})
|
||
if err != nil {
|
||
return mcp.NewToolResultError(fmt.Sprintf("failed to get memo: %v", err)), nil
|
||
}
|
||
if parent == nil {
|
||
return mcp.NewToolResultError("memo not found"), nil
|
||
}
|
||
if err := checkMemoAccess(parent, userID); err != nil {
|
||
return mcp.NewToolResultError(err.Error()), nil
|
||
}
|
||
|
||
relationType := store.MemoRelationComment
|
||
relations, err := s.store.ListMemoRelations(ctx, &store.FindMemoRelation{
|
||
RelatedMemoID: &parent.ID,
|
||
Type: &relationType,
|
||
})
|
||
if err != nil {
|
||
return mcp.NewToolResultError(fmt.Sprintf("failed to list relations: %v", err)), nil
|
||
}
|
||
if len(relations) == 0 {
|
||
out, _ := marshalJSON([]memoJSON{})
|
||
return mcp.NewToolResultText(out), nil
|
||
}
|
||
|
||
commentIDs := make([]int32, len(relations))
|
||
for i, r := range relations {
|
||
commentIDs[i] = r.MemoID
|
||
}
|
||
|
||
memos, err := s.store.ListMemos(ctx, &store.FindMemo{IDList: commentIDs})
|
||
if err != nil {
|
||
return mcp.NewToolResultError(fmt.Sprintf("failed to list comments: %v", err)), nil
|
||
}
|
||
|
||
results := make([]memoJSON, 0, len(memos))
|
||
for _, m := range memos {
|
||
if checkMemoAccess(m, userID) == nil {
|
||
results = append(results, storeMemoToJSON(m))
|
||
}
|
||
}
|
||
out, err := marshalJSON(results)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
return mcp.NewToolResultText(out), nil
|
||
}
|
||
|
||
func (s *MCPService) handleCreateMemoComment(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
|
||
userID, err := extractUserID(ctx)
|
||
if err != nil {
|
||
return mcp.NewToolResultError(err.Error()), nil
|
||
}
|
||
|
||
uid, err := parseMemoUID(req.GetString("name", ""))
|
||
if err != nil {
|
||
return mcp.NewToolResultError(err.Error()), nil
|
||
}
|
||
content := req.GetString("content", "")
|
||
if content == "" {
|
||
return mcp.NewToolResultError("content is required"), nil
|
||
}
|
||
|
||
parent, err := s.store.GetMemo(ctx, &store.FindMemo{UID: &uid})
|
||
if err != nil {
|
||
return mcp.NewToolResultError(fmt.Sprintf("failed to get memo: %v", err)), nil
|
||
}
|
||
if parent == nil {
|
||
return mcp.NewToolResultError("memo not found"), nil
|
||
}
|
||
if err := checkMemoAccess(parent, userID); err != nil {
|
||
return mcp.NewToolResultError(err.Error()), nil
|
||
}
|
||
|
||
comment, err := s.store.CreateMemo(ctx, &store.Memo{
|
||
UID: shortuuid.New(),
|
||
CreatorID: userID,
|
||
Content: content,
|
||
Visibility: parent.Visibility,
|
||
Payload: buildPayload(content),
|
||
ParentUID: &parent.UID,
|
||
})
|
||
if err != nil {
|
||
return mcp.NewToolResultError(fmt.Sprintf("failed to create comment: %v", err)), nil
|
||
}
|
||
|
||
if _, err = s.store.UpsertMemoRelation(ctx, &store.MemoRelation{
|
||
MemoID: comment.ID,
|
||
RelatedMemoID: parent.ID,
|
||
Type: store.MemoRelationComment,
|
||
}); err != nil {
|
||
return mcp.NewToolResultError(fmt.Sprintf("failed to link comment: %v", err)), nil
|
||
}
|
||
|
||
out, err := marshalJSON(storeMemoToJSON(comment))
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
return mcp.NewToolResultText(out), nil
|
||
}
|