1package iterator
 2
 3import (
 4	"context"
 5
 6	"github.com/xanzy/go-gitlab"
 7)
 8
 9type noteIterator struct {
10	issue int
11	page  int
12	index int
13	cache []*gitlab.Note
14}
15
16func newNoteIterator() *noteIterator {
17	in := &noteIterator{}
18	in.Reset(-1)
19	return in
20}
21
22func (in *noteIterator) Next(ctx context.Context, conf config) (bool, error) {
23	// first query
24	if in.cache == nil {
25		return in.getNext(ctx, conf)
26	}
27
28	// move cursor index
29	if in.index < len(in.cache)-1 {
30		in.index++
31		return true, nil
32	}
33
34	return in.getNext(ctx, conf)
35}
36
37func (in *noteIterator) Value() *gitlab.Note {
38	return in.cache[in.index]
39}
40
41func (in *noteIterator) getNext(ctx context.Context, conf config) (bool, error) {
42	ctx, cancel := context.WithTimeout(ctx, conf.timeout)
43	defer cancel()
44
45	notes, _, err := conf.gc.Notes.ListIssueNotes(
46		conf.project,
47		in.issue,
48		&gitlab.ListIssueNotesOptions{
49			ListOptions: gitlab.ListOptions{
50				Page:    in.page,
51				PerPage: conf.capacity,
52			},
53			Sort:    gitlab.String("asc"),
54			OrderBy: gitlab.String("created_at"),
55		},
56		gitlab.WithContext(ctx),
57	)
58
59	if err != nil {
60		in.Reset(-1)
61		return false, err
62	}
63
64	if len(notes) == 0 {
65		return false, nil
66	}
67
68	in.cache = notes
69	in.index = 0
70	in.page++
71
72	return true, nil
73}
74
75func (in *noteIterator) Reset(issue int) {
76	in.issue = issue
77	in.index = -1
78	in.page = -1
79	in.cache = nil
80}