| 1 | package calendar |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "fmt" |
| 7 | |
| 8 | "gorm.io/gorm" |
| 9 | |
| 10 | "amadan.net/oficina/calendar/internal/calendar/seal" |
| 11 | ) |
| 12 | |
| 13 | // BookingView is a booking with its sealed columns opened and the rows |
| 14 | // around it loaded. Event is the ROW, deliberately not an EventView: |
| 15 | // public code reads its status, times, sequence and deletion, and must |
| 16 | // never reach the host's notes, location or attendees, so those are |
| 17 | // not opened here at all (booking spec §5.5). |
| 18 | type BookingView struct { |
| 19 | Booking |
| 20 | Page BookingPageView |
| 21 | Host Person |
| 22 | HostName string // opened NameSealed, or the handle |
| 23 | Event Event |
| 24 | EventUID string |
| 25 | |
| 26 | // Title and Description are the booking's own snapshot (B20). |
| 27 | Title, Description string |
| 28 | Name, Address, Note string |
| 29 | |
| 30 | // Token is the opened management token: set only by BookingByID |
| 31 | // with withToken, and only to render a mail. |
| 32 | Token string |
| 33 | } |
| 34 | |
| 35 | // BookingByToken is the public reader. A wrong token is ErrNotFound, |
| 36 | // like a wrong feed token — never "expired", never 403. |
| 37 | func (s *Store) BookingByToken(ctx context.Context, token string) (BookingView, error) { |
| 38 | var b Booking |
| 39 | err := s.g.WithContext(ctx).Where("token_hash = ?", HashFeedToken(token)).First(&b).Error |
| 40 | if errors.Is(err, gorm.ErrRecordNotFound) { |
| 41 | return BookingView{}, ErrNotFound |
| 42 | } |
| 43 | if err != nil { |
| 44 | return BookingView{}, fmt.Errorf("calendar: read booking by token: %w", err) |
| 45 | } |
| 46 | return s.openBooking(ctx, b, false) |
| 47 | } |
| 48 | |
| 49 | // BookingByID is the internal reader, for the drain and the handlers |
| 50 | // that already hold a row. withToken opens the management token, which |
| 51 | // only a mail renderer needs. |
| 52 | func (s *Store) BookingByID(ctx context.Context, id int64, withToken bool) (BookingView, error) { |
| 53 | var b Booking |
| 54 | err := s.g.WithContext(ctx).First(&b, id).Error |
| 55 | if errors.Is(err, gorm.ErrRecordNotFound) { |
| 56 | return BookingView{}, ErrNotFound |
| 57 | } |
| 58 | if err != nil { |
| 59 | return BookingView{}, fmt.Errorf("calendar: read booking: %w", err) |
| 60 | } |
| 61 | return s.openBooking(ctx, b, withToken) |
| 62 | } |
| 63 | |
| 64 | func (s *Store) openBooking(ctx context.Context, b Booking, withToken bool) (BookingView, error) { |
| 65 | v := BookingView{Booking: b} |
| 66 | |
| 67 | var page BookingPage |
| 68 | if err := s.g.WithContext(ctx).First(&page, b.PageID).Error; err != nil { |
| 69 | return v, fmt.Errorf("calendar: read booking's page: %w", err) |
| 70 | } |
| 71 | pv, err := s.viewOf(ctx, page) |
| 72 | if err != nil { |
| 73 | return v, err |
| 74 | } |
| 75 | v.Page = pv |
| 76 | |
| 77 | if err := s.g.WithContext(ctx).First(&v.Host, page.PersonID).Error; err != nil { |
| 78 | return v, fmt.Errorf("calendar: read booking's host: %w", err) |
| 79 | } |
| 80 | if name, err := s.seal.OpenString(seal.PurposeMemberName, v.Host.NameSealed); err == nil && name != "" { |
| 81 | v.HostName = name |
| 82 | } else if v.Host.Handle != nil { |
| 83 | v.HostName = *v.Host.Handle |
| 84 | } |
| 85 | |
| 86 | // The event row INCLUDING a soft-deleted one: a host-deleted booking |
| 87 | // still exports its CANCEL (spec §5.8). |
| 88 | if err := s.g.WithContext(ctx).Unscoped().First(&v.Event, b.EventID).Error; err != nil { |
| 89 | return v, fmt.Errorf("calendar: read booking's event: %w", err) |
| 90 | } |
| 91 | if uid, err := s.seal.OpenString(seal.PurposeEventUID, v.Event.UIDSealed); err == nil { |
| 92 | v.EventUID = uid |
| 93 | } |
| 94 | |
| 95 | open := func(purpose string, ct []byte, what string) (string, error) { |
| 96 | out, err := s.seal.OpenString(purpose, ct) |
| 97 | if err != nil { |
| 98 | return "", fmt.Errorf("calendar: open booking %s (id %d): %w", what, b.ID, err) |
| 99 | } |
| 100 | return out, nil |
| 101 | } |
| 102 | if v.Title, err = open(seal.PurposeBookingTitle, b.TitleSealed, "title"); err != nil { |
| 103 | return v, err |
| 104 | } |
| 105 | if v.Description, err = open(seal.PurposeBookingDescription, b.DescriptionSealed, "description"); err != nil { |
| 106 | return v, err |
| 107 | } |
| 108 | if v.Name, err = open(seal.PurposeBookerName, b.BookerNameSealed, "name"); err != nil { |
| 109 | return v, err |
| 110 | } |
| 111 | if v.Address, err = open(seal.PurposeBookerAddress, b.BookerAddressSealed, "address"); err != nil { |
| 112 | return v, err |
| 113 | } |
| 114 | if v.Note, err = open(seal.PurposeBookerNote, b.NoteSealed, "note"); err != nil { |
| 115 | return v, err |
| 116 | } |
| 117 | if withToken { |
| 118 | if v.Token, err = open(seal.PurposeBookingToken, b.TokenSealed, "token"); err != nil { |
| 119 | return v, err |
| 120 | } |
| 121 | } |
| 122 | return v, nil |
| 123 | } |
| 124 | |
| 125 | // bookingFor finds the booking an event belongs to, if any. Used by the |
| 126 | // host's own edits to learn the event is booked (B18). |
| 127 | func bookingFor(tx *gorm.DB, eventID int64) (Booking, bool, error) { |
| 128 | var b Booking |
| 129 | err := tx.Where("event_id = ?", eventID).First(&b).Error |
| 130 | if errors.Is(err, gorm.ErrRecordNotFound) { |
| 131 | return Booking{}, false, nil |
| 132 | } |
| 133 | if err != nil { |
| 134 | return Booking{}, false, fmt.Errorf("calendar: booking for event: %w", err) |
| 135 | } |
| 136 | return b, true, nil |
| 137 | } |
| 138 | |
| 139 | // bookingIDForEvent is bookingFor without the row, for callers that |
| 140 | // only need the fact. |
| 141 | func (s *Store) bookingIDForEvent(ctx context.Context, eventID int64) (int64, bool) { |
| 142 | b, ok, err := bookingFor(s.g.WithContext(ctx), eventID) |
| 143 | if err != nil || !ok { |
| 144 | return 0, false |
| 145 | } |
| 146 | return b.ID, true |
| 147 | } |
| 148 | |
| 149 | // Effective state of a booking, read from the booking AND its event: |
| 150 | // a host who cancelled or deleted the event has cancelled the booking |
| 151 | // whether or not the transition recorded it (spec §5.3). |
| 152 | func (v BookingView) Cancelled() bool { |
| 153 | return v.State == BookingCancelled || v.Event.Status == StatusCancelled || v.Event.DeletedAt != nil |
| 154 | } |
| 155 | |
| 156 | // Live reports a confirmed booking whose event still stands. |
| 157 | func (v BookingView) Live() bool { |
| 158 | return v.State == BookingConfirmed && !v.Cancelled() |
| 159 | } |
| 160 | |
| 161 | // BookingSummaryFor is what the host's own event page and form need to |
| 162 | // know: that the event is booked, and by whom. The name, nothing else. |
| 163 | func (s *Store) BookingSummaryFor(ctx context.Context, eventID int64) (name string, booked bool) { |
| 164 | b, ok, err := bookingFor(s.g.WithContext(ctx), eventID) |
| 165 | if err != nil || !ok { |
| 166 | return "", false |
| 167 | } |
| 168 | if n, err := s.seal.OpenString(seal.PurposeBookerName, b.BookerNameSealed); err == nil { |
| 169 | name = n |
| 170 | } |
| 171 | return name, true |
| 172 | } |
| 173 | |
amadan