120 lines
2.6 KiB
Go
120 lines
2.6 KiB
Go
package d2asset
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import (
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"errors"
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"path"
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"sync"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface"
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"github.com/OpenDiablo2/OpenDiablo2/d2common"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2fileformats/d2mpq"
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)
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type archiveManager struct {
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cache d2interface.Cache
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config d2interface.Configuration
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archives []d2interface.Archive
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mutex sync.Mutex
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}
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const (
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archiveBudget = 1024 * 1024 * 512
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)
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func createArchiveManager(config d2interface.Configuration) d2interface.ArchiveManager {
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return &archiveManager{cache: d2common.CreateCache(archiveBudget), config: config}
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}
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// LoadArchiveForFile loads the archive for the given (in-archive) file path
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func (am *archiveManager) LoadArchiveForFile(filePath string) (d2interface.Archive, error) {
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am.mutex.Lock()
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defer am.mutex.Unlock()
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if err := am.CacheArchiveEntries(); err != nil {
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return nil, err
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}
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for _, archive := range am.archives {
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if archive.Contains(filePath) {
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result, ok := am.LoadArchive(archive.Path())
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if ok == nil {
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return result, nil
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}
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}
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}
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return nil, errors.New("file not found")
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}
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// FileExistsInArchive checks if a file exists in an archive
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func (am *archiveManager) FileExistsInArchive(filePath string) (bool, error) {
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am.mutex.Lock()
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defer am.mutex.Unlock()
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if err := am.CacheArchiveEntries(); err != nil {
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return false, err
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}
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for _, archiveEntry := range am.archives {
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if archiveEntry.Contains(filePath) {
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return true, nil
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}
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}
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return false, nil
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}
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// LoadArchive loads and caches an archive
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func (am *archiveManager) LoadArchive(archivePath string) (d2interface.Archive, error) {
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if archive, found := am.cache.Retrieve(archivePath); found {
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return archive.(d2interface.Archive), nil
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}
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archive, err := d2mpq.Load(archivePath)
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if err != nil {
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return nil, err
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}
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if err := am.cache.Insert(archivePath, archive, int(archive.Size())); err != nil {
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return nil, err
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}
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return archive, nil
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}
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// CacheArchiveEntries updates the archive entries
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func (am *archiveManager) CacheArchiveEntries() error {
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if len(am.archives) == len(am.config.MpqLoadOrder()) {
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return nil
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}
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am.archives = nil
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for _, archiveName := range am.config.MpqLoadOrder() {
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archivePath := path.Join(am.config.MpqPath(), archiveName)
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archive, err := am.LoadArchive(archivePath)
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if err != nil {
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return err
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}
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am.archives = append(
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am.archives,
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archive,
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)
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}
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return nil
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}
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// ClearCache clears the archive manager cache
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func (am *archiveManager) ClearCache() {
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am.cache.Clear()
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}
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// GetCache returns the archive manager cache
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func (am *archiveManager) GetCache() d2interface.Cache {
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return am.cache
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}
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