datasource.gno

 1package hof
 2
 3import (
 4	"errors"
 5
 6	"gno.land/p/demo/avl"
 7	"gno.land/p/demo/ufmt"
 8	"gno.land/p/jeronimoalbi/datasource"
 9	"gno.land/p/moul/md"
10)
11
12func NewDatasource() Datasource {
13	return Datasource{exhibition}
14}
15
16type Datasource struct {
17	exhibition *Exhibition
18}
19
20func (ds Datasource) Size() int { return ds.exhibition.items.Size() }
21
22func (ds Datasource) Records(q datasource.Query) datasource.Iterator {
23	return &iterator{
24		exhibition: ds.exhibition,
25		index:      q.Offset,
26		maxIndex:   q.Offset + q.Count,
27	}
28}
29
30func (ds Datasource) Record(id string) (datasource.Record, error) {
31	v, found := ds.exhibition.items.Get(id)
32	if !found {
33		return nil, errors.New("realm submission not found")
34	}
35	return record{v.(*Item)}, nil
36}
37
38type record struct {
39	item *Item
40}
41
42func (r record) ID() string     { return r.item.id.String() }
43func (r record) String() string { return r.item.pkgpath }
44
45func (r record) Fields() (datasource.Fields, error) {
46	fields := avl.NewTree()
47	fields.Set(
48		"details",
49		ufmt.Sprintf("Votes: ⏶ %d - ⏷ %d", r.item.upvote.Size(), r.item.downvote.Size()),
50	)
51	return fields, nil
52}
53
54func (r record) Content() (string, error) {
55	content := md.H1(r.item.title)
56	content += md.H2(r.item.description)
57	content += r.item.Render(false)
58	return content, nil
59}
60
61type iterator struct {
62	exhibition      *Exhibition
63	index, maxIndex int
64	record          *record
65}
66
67func (it iterator) Record() datasource.Record { return it.record }
68func (it iterator) Err() error                { return nil }
69
70func (it *iterator) Next() bool {
71	if it.index >= it.maxIndex || it.index >= it.exhibition.items.Size() {
72		return false
73	}
74
75	_, v := it.exhibition.items.GetByIndex(it.index)
76	it.record = &record{v.(*Item)}
77	it.index++
78	return true
79}