| 1 | package calendar |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "fmt" |
| 6 | "gorm.io/gorm" |
| 7 | "time" |
| 8 | |
| 9 | "amadan.net/oficina/calendar/internal/calendar/seal" |
| 10 | ) |
| 11 | |
| 12 | // SetAttendees replaces an event's attendee list. |
| 13 | // |
| 14 | // The caller must ALREADY have read the event through a grant join — |
| 15 | // this takes an id, not a person, and does no scoping of its own. Every |
| 16 | // current caller comes straight off Store.Event or Store.CreateEvent, |
| 17 | // both of which 404 a row that is not yours. |
| 18 | func (s *Store) SetAttendees(ctx context.Context, eventID int64, addresses []string) error { |
| 19 | return s.setAttendeesOn(s.g.WithContext(ctx), eventID, addresses) |
| 20 | } |
| 21 | |
| 22 | // setAttendeesOn is SetAttendees on a caller's transaction, so a |
| 23 | // booking's confirmation can record the booker in the same commit. |
| 24 | func (s *Store) setAttendeesOn(tx *gorm.DB, eventID int64, addresses []string) error { |
| 25 | if err := tx. |
| 26 | Where("event_id = ?", eventID).Delete(&Attendee{}).Error; err != nil { |
| 27 | return fmt.Errorf("calendar: clear attendees: %w", err) |
| 28 | } |
| 29 | seen := map[string]bool{} |
| 30 | now := time.Now().UTC() |
| 31 | for _, addr := range addresses { |
| 32 | addr = normalizeAddress(addr) |
| 33 | if addr == "" { |
| 34 | continue |
| 35 | } |
| 36 | fp, err := s.seal.Fingerprint(seal.PurposeAttendeeLookup, addr) |
| 37 | if err != nil { |
| 38 | return fmt.Errorf("calendar: fingerprint attendee: %w", err) |
| 39 | } |
| 40 | if seen[fp] { |
| 41 | continue |
| 42 | } |
| 43 | seen[fp] = true |
| 44 | sealed, err := s.seal.SealString(seal.PurposeAttendeeAddress, addr) |
| 45 | if err != nil { |
| 46 | return fmt.Errorf("calendar: seal attendee: %w", err) |
| 47 | } |
| 48 | row := Attendee{ |
| 49 | EventID: eventID, |
| 50 | AddressSealed: sealed, |
| 51 | AddressFP: fp, |
| 52 | CreatedAt: now, |
| 53 | } |
| 54 | if err := tx.Create(&row).Error; err != nil { |
| 55 | return fmt.Errorf("calendar: add attendee: %w", err) |
| 56 | } |
| 57 | } |
| 58 | return nil |
| 59 | } |
| 60 | |
| 61 | // AttendeesFor opens an event's attendee addresses, oldest first. |
| 62 | // |
| 63 | // Scoping is the caller's, exactly as in SetAttendees. |
| 64 | func (s *Store) AttendeesFor(ctx context.Context, eventID int64) ([]string, error) { |
| 65 | var rows []Attendee |
| 66 | if err := s.g.WithContext(ctx). |
| 67 | Where("event_id = ?", eventID). |
| 68 | Order("id ASC").Find(&rows).Error; err != nil { |
| 69 | return nil, fmt.Errorf("calendar: list attendees: %w", err) |
| 70 | } |
| 71 | out := make([]string, 0, len(rows)) |
| 72 | for _, row := range rows { |
| 73 | addr, err := s.seal.OpenString(seal.PurposeAttendeeAddress, row.AddressSealed) |
| 74 | if err != nil { |
| 75 | return nil, fmt.Errorf("calendar: open attendee: %w", err) |
| 76 | } |
| 77 | if addr != "" { |
| 78 | out = append(out, addr) |
| 79 | } |
| 80 | } |
| 81 | return out, nil |
| 82 | } |
| 83 | |
| 84 | // AttachAttendees fills in EventView.Attendees for a slice about to be |
| 85 | // exported. |
| 86 | // |
| 87 | // One query for the whole slice rather than one per event: an export of |
| 88 | // a year's standups is a thousand EventViews, and a read per event |
| 89 | // turns a feed poll into a thousand round trips on a platform billed by |
| 90 | // residency. |
| 91 | // |
| 92 | // Only the export path calls this. A month view prints no attendee, so |
| 93 | // paying for one there would be a cost with no reader. |
| 94 | func (s *Store) AttachAttendees(ctx context.Context, events []EventView) error { |
| 95 | if len(events) == 0 { |
| 96 | return nil |
| 97 | } |
| 98 | // An expanded occurrence and its master share one row of attendees, |
| 99 | // so the master's id is the one to ask for. |
| 100 | owner := func(e EventView) int64 { |
| 101 | if e.SeriesID != nil && *e.SeriesID != 0 { |
| 102 | return *e.SeriesID |
| 103 | } |
| 104 | return e.ID |
| 105 | } |
| 106 | |
| 107 | ids := make([]int64, 0, len(events)) |
| 108 | seen := map[int64]bool{} |
| 109 | for _, e := range events { |
| 110 | id := owner(e) |
| 111 | if !seen[id] { |
| 112 | seen[id] = true |
| 113 | ids = append(ids, id) |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | var rows []Attendee |
| 118 | if err := s.g.WithContext(ctx). |
| 119 | Where("event_id IN ?", ids).Order("id ASC").Find(&rows).Error; err != nil { |
| 120 | return fmt.Errorf("calendar: list attendees for export: %w", err) |
| 121 | } |
| 122 | byEvent := map[int64][]string{} |
| 123 | for _, row := range rows { |
| 124 | addr, err := s.seal.OpenString(seal.PurposeAttendeeAddress, row.AddressSealed) |
| 125 | if err != nil { |
| 126 | return fmt.Errorf("calendar: open attendee for export: %w", err) |
| 127 | } |
| 128 | if addr != "" { |
| 129 | byEvent[row.EventID] = append(byEvent[row.EventID], addr) |
| 130 | } |
| 131 | } |
| 132 | for i := range events { |
| 133 | events[i].Attendees = byEvent[owner(events[i])] |
| 134 | } |
| 135 | return nil |
| 136 | } |
| 137 | |
amadan