86 lines
2.5 KiB
Go
86 lines
2.5 KiB
Go
package policy
|
|
|
|
import (
|
|
"context"
|
|
"math/rand"
|
|
"time"
|
|
|
|
"github.com/rclone/rclone/backend/union/upstream"
|
|
"github.com/rclone/rclone/fs"
|
|
)
|
|
|
|
func init() {
|
|
registerPolicy("eprand", &EpRand{})
|
|
}
|
|
|
|
// EpRand stands for existing path, random
|
|
// Calls epall and then randomizes. Returns one candidate.
|
|
type EpRand struct {
|
|
EpAll
|
|
}
|
|
|
|
func (p *EpRand) rand(upstreams []*upstream.Fs) *upstream.Fs {
|
|
rand.Seed(time.Now().Unix())
|
|
return upstreams[rand.Intn(len(upstreams))]
|
|
}
|
|
|
|
func (p *EpRand) randEntries(entries []upstream.Entry) upstream.Entry {
|
|
rand.Seed(time.Now().Unix())
|
|
return entries[rand.Intn(len(entries))]
|
|
}
|
|
|
|
// Action category policy, governing the modification of files and directories
|
|
func (p *EpRand) Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error) {
|
|
upstreams, err := p.EpAll.Action(ctx, upstreams, path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return []*upstream.Fs{p.rand(upstreams)}, nil
|
|
}
|
|
|
|
// ActionEntries is ACTION category policy but receiving a set of candidate entries
|
|
func (p *EpRand) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error) {
|
|
entries, err := p.EpAll.ActionEntries(entries...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return []upstream.Entry{p.randEntries(entries)}, nil
|
|
}
|
|
|
|
// Create category policy, governing the creation of files and directories
|
|
func (p *EpRand) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error) {
|
|
upstreams, err := p.EpAll.Create(ctx, upstreams, path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return []*upstream.Fs{p.rand(upstreams)}, nil
|
|
}
|
|
|
|
// CreateEntries is CREATE category policy but receiving a set of candidate entries
|
|
func (p *EpRand) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error) {
|
|
entries, err := p.EpAll.CreateEntries(entries...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return []upstream.Entry{p.randEntries(entries)}, nil
|
|
}
|
|
|
|
// Search category policy, governing the access to files and directories
|
|
func (p *EpRand) Search(ctx context.Context, upstreams []*upstream.Fs, path string) (*upstream.Fs, error) {
|
|
if len(upstreams) == 0 {
|
|
return nil, fs.ErrorObjectNotFound
|
|
}
|
|
upstreams, err := p.epall(ctx, upstreams, path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return p.rand(upstreams), nil
|
|
}
|
|
|
|
// SearchEntries is SEARCH category policy but receiving a set of candidate entries
|
|
func (p *EpRand) SearchEntries(entries ...upstream.Entry) (upstream.Entry, error) {
|
|
if len(entries) == 0 {
|
|
return nil, fs.ErrorObjectNotFound
|
|
}
|
|
return p.randEntries(entries), nil
|
|
}
|