1package bug
 2
 3import (
 4	"encoding/json"
 5	"fmt"
 6
 7	"github.com/MichaelMure/git-bug/entity"
 8	"github.com/MichaelMure/git-bug/entity/dag"
 9)
10
11const (
12	_ dag.OperationType = iota
13	CreateOp
14	SetTitleOp
15	AddCommentOp
16	SetStatusOp
17	LabelChangeOp
18	EditCommentOp
19	NoOpOp
20	SetMetadataOp
21)
22
23// Operation define the interface to fulfill for an edit operation of a Bug
24type Operation interface {
25	dag.Operation
26
27	// Apply the operation to a Snapshot to create the final state
28	Apply(snapshot *Snapshot)
29}
30
31// make sure that package external operations do conform to our interface
32var _ Operation = &dag.NoOpOperation[*Snapshot]{}
33var _ Operation = &dag.SetMetadataOperation[*Snapshot]{}
34
35func operationUnmarshaller(raw json.RawMessage, resolvers entity.Resolvers) (dag.Operation, error) {
36	var t struct {
37		OperationType dag.OperationType `json:"type"`
38	}
39
40	if err := json.Unmarshal(raw, &t); err != nil {
41		return nil, err
42	}
43
44	var op dag.Operation
45
46	switch t.OperationType {
47	case AddCommentOp:
48		op = &AddCommentOperation{}
49	case CreateOp:
50		op = &CreateOperation{}
51	case EditCommentOp:
52		op = &EditCommentOperation{}
53	case LabelChangeOp:
54		op = &LabelChangeOperation{}
55	case NoOpOp:
56		op = &dag.NoOpOperation[*Snapshot]{}
57	case SetMetadataOp:
58		op = &dag.SetMetadataOperation[*Snapshot]{}
59	case SetStatusOp:
60		op = &SetStatusOperation{}
61	case SetTitleOp:
62		op = &SetTitleOperation{}
63	default:
64		panic(fmt.Sprintf("unknown operation type %v", t.OperationType))
65	}
66
67	err := json.Unmarshal(raw, &op)
68	if err != nil {
69		return nil, err
70	}
71
72	return op, nil
73}