1package bug
 2
 3import (
 4	"github.com/kevinburke/go.uuid"
 5)
 6
 7// Bug hold the data of a bug thread, organized in a way close to
 8// how it will be persisted inside Git. This is the datastructure
 9// used for merge of two different version.
10type Bug struct {
11	// Id used as unique identifier
12	Id uuid.UUID
13
14	// TODO: need a way to order bugs
15	// Probably a Lamport clock
16
17	Packs []OperationPack
18
19	Staging OperationPack
20}
21
22// Create a new Bug
23func NewBug() (*Bug, error) {
24
25	// Creating UUID Version 4
26	id, err := uuid.ID4()
27
28	if err != nil {
29		return nil, err
30	}
31
32	return &Bug{
33		Id: id,
34	}, nil
35}
36
37// IsValid check if the Bug data is valid
38func (bug *Bug) IsValid() bool {
39	// non-empty
40	if len(bug.Packs) == 0 {
41		return false
42	}
43
44	// check if each pack is valid
45	for _, pack := range bug.Packs {
46		if !pack.IsValid() {
47			return false
48		}
49	}
50
51	// The very first Op should be a CREATE
52	firstOp := bug.Packs[0].Operations[0]
53	if firstOp.OpType() != CREATE {
54		return false
55	}
56
57	// Check that there is no more CREATE op
58	it := NewOperationIterator(bug)
59	createCount := 0
60	for it.Next() {
61		if it.Value().OpType() == CREATE {
62			createCount++
63		}
64	}
65
66	if createCount != 1 {
67		return false
68	}
69
70	return true
71}
72
73func (bug *Bug) Append(op Operation) {
74	bug.Staging.Append(op)
75}
76
77func (bug *Bug) Commit() {
78	bug.Packs = append(bug.Packs, bug.Staging)
79	bug.Staging = OperationPack{}
80}
81
82func (bug *Bug) HumanId() string {
83	return bug.Id.String()
84}