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136 lines
2.8 KiB
Go
136 lines
2.8 KiB
Go
package dataswamp
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import (
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"caj-larsson/bog/dataswamp/namespace"
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"caj-larsson/bog/dataswamp/swampfile"
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"caj-larsson/bog/util"
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"io"
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"strconv"
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"time"
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// "errors"
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// "fmt"
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)
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type SwampFileService struct {
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ns_svc namespace.NamespaceService
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swamp_file_repo swampfile.Repository
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logger util.Logger
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eventBus util.EventBus
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}
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func NewSwampFileService(
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ns_svc namespace.NamespaceService,
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swamp_file_repo swampfile.Repository,
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logger util.Logger,
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) *SwampFileService {
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s := SwampFileService{ns_svc, swamp_file_repo, logger, *util.NewEventBus()}
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ns_svc.Wire(s.eventBus.Register, s.eventBus.Handle)
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return &s
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}
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func (s SwampFileService) NamespaceStats() []namespace.Namespace {
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return s.ns_svc.All()
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}
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func (s SwampFileService) SaveFile(ref swampfile.FileReference, src io.Reader, size int64) error {
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ns := s.ns_svc.GetOrCreateNs(ref.UserAgent)
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r, err := ref.Clean(true)
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if err != nil {
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return err
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}
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if !ns.FileQuota.Allows(size) {
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return namespace.ErrExceedQuota
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}
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f, err := s.swamp_file_repo.Create(r.Path, strconv.FormatInt(ns.ID, 10))
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if err != nil {
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// TODO: convert this into a different error.
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return err
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}
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s.eventBus.Handle(*util.NewEvent("FileUsed", struct {
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Name string
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Size int64}{
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ns.Name,
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f.Size(),
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}))
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// TODO: rewrite this into an interruptable loop that emits downloaded events
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written, err := io.CopyN(f, src, size)
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if written < size {
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s.swamp_file_repo.Delete(r.Path, strconv.FormatInt(ns.ID, 10)) //
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return swampfile.ErrContentSizeExaggerated
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}
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var buf = make([]byte, 1)
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overread, err := src.Read(buf)
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if overread > 0 || err != io.EOF {
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s.swamp_file_repo.Delete(r.Path, strconv.FormatInt(ns.ID, 10))
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return swampfile.ErrContentSizeExceeded
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}
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f.Close()
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s.eventBus.Handle(*util.NewEvent("FileRecieved", struct {
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Name string
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Size int64}{
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ns.Name,
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written,
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}))
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return nil
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}
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func (s SwampFileService) OpenOutFile(ref swampfile.FileReference) (swampfile.SwampOutFile, error) {
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ns := s.ns_svc.GetOrCreateNs(ref.UserAgent)
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r, err := ref.Clean(true)
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if err != nil {
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return nil, err
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}
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f, err := s.swamp_file_repo.Open(r.Path, strconv.FormatInt(ns.ID, 10))
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if err != nil {
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return nil, err
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}
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s.eventBus.Handle(*util.NewEvent("FileSent", f.Size()))
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return f, nil
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}
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func (s SwampFileService) CleanUpExpiredFiles() error {
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s.logger.Info("Cleaning up expired files")
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for _, ns := range s.ns_svc.All() {
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expiry := time.Now().Add(-ns.AllowanceDuration)
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dfs, err := s.swamp_file_repo.DeleteOlderThan(strconv.FormatInt(ns.ID, 10), expiry)
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if err != nil {
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panic(err)
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}
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for _, df := range dfs {
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s.eventBus.Handle(*util.NewEvent("FileDeleted", struct {
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Name string
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Size int64}{
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ns.Name,
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df.Size,
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}))
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}
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}
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return nil
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}
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