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paginate item list

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This commit is contained in:
Nazar Kanaev
2020-07-09 14:50:23 +01:00
parent bc627f5d2c
commit a203792b1d
4 changed files with 89 additions and 9 deletions
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25
storage/item.go
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@@ -96,7 +96,7 @@ func (s *Storage) CreateItems(items []Item) bool {
return true
}
func (s *Storage) ListItems(filter ItemFilter) []Item {
func listQueryPredicate(filter ItemFilter) (string, []interface{}) {
cond := make([]string, 0)
args := make([]interface{}, 0)
if filter.FolderID != nil {
@@ -116,7 +116,11 @@ func (s *Storage) ListItems(filter ItemFilter) []Item {
if len(cond) > 0 {
predicate = strings.Join(cond, " and ")
}
return predicate, args
}
func (s *Storage) ListItems(filter ItemFilter, offset, limit int) []Item {
predicate, args := listQueryPredicate(filter)
result := make([]Item, 0, 0)
query := fmt.Sprintf(`
select
@@ -126,7 +130,8 @@ func (s *Storage) ListItems(filter ItemFilter) []Item {
join feeds f on f.id = i.feed_id
where %s
order by i.date desc
`, predicate)
limit %d offset %d
`, predicate, limit, offset)
rows, err := s.db.Query(query, args...)
if err != nil {
s.log.Print(err)
@@ -157,6 +162,22 @@ func (s *Storage) ListItems(filter ItemFilter) []Item {
return result
}
func (s *Storage) CountItems(filter ItemFilter) int64 {
predicate, args := listQueryPredicate(filter)
query := fmt.Sprintf(`
select count(i.id)
from items i
join feeds f on f.id = i.feed_id
where %s`, predicate)
row := s.db.QueryRow(query, args...)
if row != nil {
var result int64
row.Scan(&result)
return result
}
return 0
}
func (s *Storage) UpdateItemStatus(item_id int64, status ItemStatus) bool {
_, err := s.db.Exec(`update items set status = ? where id = ?`, status, item_id)
return err == nil