diff options
Diffstat (limited to 'syncapi/types/types.go')
| -rw-r--r-- | syncapi/types/types.go | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/syncapi/types/types.go b/syncapi/types/types.go index 8a79ccd4..caa1b3ad 100644 --- a/syncapi/types/types.go +++ b/syncapi/types/types.go @@ -47,6 +47,34 @@ type StreamEvent struct { ExcludeFromSync bool } +// Range represents a range between two stream positions. +type Range struct { + // From is the position the client has already received. + From StreamPosition + // To is the position the client is going towards. + To StreamPosition + // True if the client is going backwards + Backwards bool +} + +// Low returns the low number of the range. +// This represents the position the client already has and hence is exclusive. +func (r *Range) Low() StreamPosition { + if !r.Backwards { + return r.From + } + return r.To +} + +// High returns the high number of the range +// This represents the position the client is going towards and hence is inclusive. +func (r *Range) High() StreamPosition { + if !r.Backwards { + return r.To + } + return r.From +} + // SyncTokenType represents the type of a sync token. // It can be either "s" (representing a position in the whole stream of events) // or "t" (representing a position in a room's topology/depth). |