1package board
 2
 3import (
 4	"fmt"
 5
 6	"github.com/MichaelMure/git-bug/entities/identity"
 7	"github.com/MichaelMure/git-bug/entity"
 8	"github.com/MichaelMure/git-bug/entity/dag"
 9	"github.com/MichaelMure/git-bug/util/text"
10)
11
12var _ Operation = &SetTitleOperation{}
13
14// SetTitleOperation will change the title of a board
15type SetTitleOperation struct {
16	dag.OpBase
17	Title string `json:"title"`
18	Was   string `json:"was"`
19}
20
21func (op *SetTitleOperation) Id() entity.Id {
22	return dag.IdOperation(op, &op.OpBase)
23}
24
25func (op *SetTitleOperation) Validate() error {
26	if err := op.OpBase.Validate(op, SetTitleOp); err != nil {
27		return err
28	}
29
30	if text.Empty(op.Title) {
31		return fmt.Errorf("title is empty")
32	}
33
34	if !text.SafeOneLine(op.Title) {
35		return fmt.Errorf("title has unsafe characters")
36	}
37
38	if !text.SafeOneLine(op.Was) {
39		return fmt.Errorf("previous title has unsafe characters")
40	}
41
42	return nil
43}
44
45func (op *SetTitleOperation) Apply(snapshot *Snapshot) {
46	snapshot.Title = op.Title
47	snapshot.addActor(op.Author())
48}
49
50func NewSetTitleOp(author identity.Interface, unixTime int64, title string, was string) *SetTitleOperation {
51	return &SetTitleOperation{
52		OpBase: dag.NewOpBase(SetTitleOp, author, unixTime),
53		Title:  title,
54		Was:    was,
55	}
56}
57
58// SetTitle is a convenience function to change a board title
59func SetTitle(b Interface, author identity.Interface, unixTime int64, title string, metadata map[string]string) (*SetTitleOperation, error) {
60	var lastTitleOp *SetTitleOperation
61	for _, op := range b.Operations() {
62		switch op := op.(type) {
63		case *SetTitleOperation:
64			lastTitleOp = op
65		}
66	}
67
68	var was string
69	if lastTitleOp != nil {
70		was = lastTitleOp.Title
71	} else {
72		was = b.FirstOp().(*CreateOperation).Title
73	}
74
75	op := NewSetTitleOp(author, unixTime, title, was)
76	for key, val := range metadata {
77		op.SetMetadata(key, val)
78	}
79	if err := op.Validate(); err != nil {
80		return nil, err
81	}
82
83	b.Append(op)
84	return op, nil
85}