54 lines
1015 B
Go
54 lines
1015 B
Go
package main
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import (
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"render231011/internal/thestore"
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"slices"
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"time"
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)
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type Oplog struct {
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events []timestampedEvent
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idx int // todo
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lastTruncated time.Time
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}
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type timestampedEvent struct {
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t time.Time
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e thestore.Event
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}
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// gotcha duration? bigger N? whatever
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func NewOplog() *Oplog {
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return &Oplog{
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events: make([]timestampedEvent, 0, 1024),
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}
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}
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// todo circular queue if we got time
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func (oplog *Oplog) Push(event thestore.Event) {
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oplog.push(time.Now(), event)
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}
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func (oplog *Oplog) push(t time.Time, event thestore.Event) {
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oplog.events = append(oplog.events, timestampedEvent{
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t: t,
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e: event,
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})
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}
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func (oplog *Oplog) Since(t time.Time) ([]thestore.Event, bool) {
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if !t.After(oplog.lastTruncated) {
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return nil, false
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}
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result := make([]thestore.Event, 0, 5)
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for i := len(oplog.events) - 1; i >= 0; i-- {
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if !oplog.events[i].t.After(t) {
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break
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}
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result = append(result, oplog.events[i].e)
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}
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slices.Reverse(result)
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return result, len(result) > 0
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}
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