package cache
import (
"encoding/gob"
"github.com/MichaelMure/git-bug/bug"
"github.com/MichaelMure/git-bug/util/lamport"
)
// BugExcerpt hold a subset of the bug values to be able to sort and filter bugs
// efficiently without having to read and compile each raw bugs.
type BugExcerpt struct {
Id string
CreateLamportTime lamport.Time
EditLamportTime lamport.Time
CreateUnixTime int64
EditUnixTime int64
Status bug.Status
Author bug.Person
Labels []bug.Label
}
func NewBugExcerpt(b bug.Interface, snap *bug.Snapshot) *BugExcerpt {
return &BugExcerpt{
Id: b.Id(),
CreateLamportTime: b.CreateLamportTime(),
EditLamportTime: b.EditLamportTime(),
CreateUnixTime: b.FirstOp().GetUnixTime(),
EditUnixTime: snap.LastEditUnix(),
Status: snap.Status,
Author: snap.Author,
Labels: snap.Labels,
}
}
// Package initialisation used to register the type for (de)serialization
func init() {
gob.Register(BugExcerpt{})
}
/*
* Sorting
*/
type BugsById []*BugExcerpt
func (b BugsById) Len() int {
return len(b)
}
func (b BugsById) Less(i, j int) bool {
return b[i].Id < b[j].Id
}
func (b BugsById) Swap(i, j int) {
b[i], b[j] = b[j], b[i]
}
type BugsByCreationTime []*BugExcerpt
func (b BugsByCreationTime) Len() int {
return len(b)
}
func (b BugsByCreationTime) Less(i, j int) bool {
if b[i].CreateLamportTime < b[j].CreateLamportTime {
return true
}
if b[i].CreateLamportTime > b[j].CreateLamportTime {
return false
}
// When the logical clocks are identical, that means we had a concurrent
// edition. In this case we rely on the timestamp. While the timestamp might
// be incorrect due to a badly set clock, the drift in sorting is bounded
// by the first sorting using the logical clock. That means that if users
// synchronize their bugs regularly, the timestamp will rarely be used, and
// should still provide a kinda accurate sorting when needed.
return b[i].CreateUnixTime < b[j].CreateUnixTime
}
func (b BugsByCreationTime) Swap(i, j int) {
b[i], b[j] = b[j], b[i]
}
type BugsByEditTime []*BugExcerpt
func (b BugsByEditTime) Len() int {
return len(b)
}
func (b BugsByEditTime) Less(i, j int) bool {
if b[i].EditLamportTime < b[j].EditLamportTime {
return true
}
if b[i].EditLamportTime > b[j].EditLamportTime {
return false
}
// When the logical clocks are identical, that means we had a concurrent
// edition. In this case we rely on the timestamp. While the timestamp might
// be incorrect due to a badly set clock, the drift in sorting is bounded
// by the first sorting using the logical clock. That means that if users
// synchronize their bugs regularly, the timestamp will rarely be used, and
// should still provide a kinda accurate sorting when needed.
return b[i].EditUnixTime < b[j].EditUnixTime
}
func (b BugsByEditTime) Swap(i, j int) {
b[i], b[j] = b[j], b[i]
}
