filebrowser/files/listing.go

112 lines
2.2 KiB
Go

package files
import (
"sort"
"strings"
"github.com/maruel/natural"
)
// Listing is a collection of files.
type Listing struct {
Items []*FileInfo `json:"items"`
NumDirs int `json:"numDirs"`
NumFiles int `json:"numFiles"`
Sorting Sorting `json:"sorting"`
}
// ApplySort applies the sort order using .Order and .Sort
//
//nolint:goconst
func (l Listing) ApplySort() {
// Check '.Order' to know how to sort
// TODO: use enum
if !l.Sorting.Asc {
switch l.Sorting.By {
case "name":
sort.Sort(sort.Reverse(byName(l)))
case "size":
sort.Sort(sort.Reverse(bySize(l)))
case "modified":
sort.Sort(sort.Reverse(byModified(l)))
default:
// If not one of the above, do nothing
return
}
} else { // If we had more Orderings we could add them here
switch l.Sorting.By {
case "name":
sort.Sort(byName(l))
case "size":
sort.Sort(bySize(l))
case "modified":
sort.Sort(byModified(l))
default:
sort.Sort(byName(l))
return
}
}
}
// Implement sorting for Listing
type byName Listing
type bySize Listing
type byModified Listing
// By Name
func (l byName) Len() int {
return len(l.Items)
}
func (l byName) Swap(i, j int) {
l.Items[i], l.Items[j] = l.Items[j], l.Items[i]
}
// Treat upper and lower case equally
func (l byName) Less(i, j int) bool {
if l.Items[i].IsDir && !l.Items[j].IsDir {
return l.Sorting.Asc
}
if !l.Items[i].IsDir && l.Items[j].IsDir {
return !l.Sorting.Asc
}
return natural.Less(strings.ToLower(l.Items[j].Name), strings.ToLower(l.Items[i].Name))
}
// By Size
func (l bySize) Len() int {
return len(l.Items)
}
func (l bySize) Swap(i, j int) {
l.Items[i], l.Items[j] = l.Items[j], l.Items[i]
}
const directoryOffset = -1 << 31 // = math.MinInt32
func (l bySize) Less(i, j int) bool {
iSize, jSize := l.Items[i].Size, l.Items[j].Size
if l.Items[i].IsDir {
iSize = directoryOffset + iSize
}
if l.Items[j].IsDir {
jSize = directoryOffset + jSize
}
return iSize < jSize
}
// By Modified
func (l byModified) Len() int {
return len(l.Items)
}
func (l byModified) Swap(i, j int) {
l.Items[i], l.Items[j] = l.Items[j], l.Items[i]
}
func (l byModified) Less(i, j int) bool {
iModified, jModified := l.Items[i].ModTime, l.Items[j].ModTime
return iModified.Sub(jModified) < 0
}