82 lines
1.7 KiB
Go
82 lines
1.7 KiB
Go
package core
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import (
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"os"
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"sync"
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"time"
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)
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// isGeneratedType just checks if a file's contents implemented is GeneratedFileContents
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func isGeneratedType(f *file) bool {
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switch f.contents.(type) {
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case *generatedFileContents:
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return true
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default:
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return false
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}
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}
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// file provides a structure for managing a cached file including freshness, last refresh time etc
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type file struct {
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contents FileContents
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lastRefresh int64
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isFresh bool
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sync.RWMutex
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}
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// newFile returns a new File based on supplied FileContents
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func newFile(contents FileContents) *file {
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return &file{
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contents,
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0,
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true,
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sync.RWMutex{},
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}
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}
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// IsFresh returns files freshness status
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func (f *file) IsFresh() bool {
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return f.isFresh
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}
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// SetFresh sets the file as fresh
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func (f *file) SetFresh() {
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f.isFresh = true
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}
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// SetUnfresh sets the file as unfresh
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func (f *file) SetUnfresh() {
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f.isFresh = false
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}
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// LastRefresh gets the time in nanoseconds of last refresh
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func (f *file) LastRefresh() int64 {
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return f.lastRefresh
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}
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// UpdateRefreshTime updates the lastRefresh time to the current time in nanoseconds
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func (f *file) UpdateRefreshTime() {
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f.lastRefresh = time.Now().UnixNano()
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}
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// CacheContents caches the file contents using the supplied file descriptor
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func (f *file) CacheContents(fd *os.File, path *Path) Error {
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f.contents.Clear()
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// Load the file contents into cache
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err := f.contents.Load(fd, path)
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if err != nil {
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return err
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}
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// Set the cache freshness
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f.UpdateRefreshTime()
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f.SetFresh()
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return nil
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}
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// WriteToClient writes the cached file contents to the supplied client
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func (f *file) WriteToClient(client *Client, path *Path) Error {
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return f.contents.WriteToClient(client, path)
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}
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