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139 lines
2.7 KiB
Go
139 lines
2.7 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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"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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namespace_repo namespace.Repository
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swamp_file_repo swampfile.Repository
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default_allowance_bytes int64
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default_allowance_duration time.Duration
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}
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func NewSwampFileService(
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namespace_repo namespace.Repository,
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swamp_file_repo swampfile.Repository,
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da_bytes int64,
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da_duration time.Duration,
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) SwampFileService {
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return SwampFileService{namespace_repo, swamp_file_repo, da_bytes, da_duration}
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}
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func (s SwampFileService) getOrCreateNs(namespace_in string) *namespace.Namespace {
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ns, err := s.namespace_repo.GetByName(namespace_in)
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if err == namespace.ErrNotExists {
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new_ns := namespace.Namespace{
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0,
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namespace_in,
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time.Now(),
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s.default_allowance_duration,
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namespace.FileSizeQuota{s.default_allowance_bytes, 0},
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}
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created_ns, err := s.namespace_repo.Create(new_ns)
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if err != nil {
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panic(err)
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}
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return created_ns
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}
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if err != nil {
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panic(err)
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}
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return ns
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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.getOrCreateNs(ref.UserAgent)
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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(ref.Path, strconv.FormatInt(ns.ID, 10))
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if err != nil {
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return err
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}
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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(ref.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(ref.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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ns.FileQuota.Add(size)
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s.namespace_repo.Update(ns.ID, *ns)
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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.getOrCreateNs(ref.UserAgent)
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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(ref.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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return f, nil
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}
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func (s SwampFileService) CleanUpExpiredFiles() error {
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nss, err := s.namespace_repo.All()
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if err != nil {
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return err
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}
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for _, ns := range nss {
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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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for _, df := range dfs {
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ns.FileQuota.Remove(df.Size)
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}
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if err != nil {
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panic(err)
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}
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s.namespace_repo.Update(ns.ID, ns)
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}
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return nil
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}
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