mirror of https://github.com/lus/pasty.git
146 lines
3.2 KiB
Go
146 lines
3.2 KiB
Go
package file
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import (
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"encoding/base64"
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"encoding/json"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"time"
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"github.com/lus/pasty/internal/config"
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"github.com/lus/pasty/internal/shared"
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)
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// FileDriver represents the file storage driver
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type FileDriver struct {
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filePath string
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}
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// Initialize initializes the file storage driver
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func (driver *FileDriver) Initialize() error {
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driver.filePath = config.Current.File.Path
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return os.MkdirAll(driver.filePath, os.ModePerm)
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}
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// Terminate terminates the file storage driver (does nothing, because the file storage driver does not need any termination)
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func (driver *FileDriver) Terminate() error {
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return nil
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}
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// ListIDs returns a list of all existing paste IDs
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func (driver *FileDriver) ListIDs() ([]string, error) {
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// Define the IDs slice
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var ids []string
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// Fill the IDs slice
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err := filepath.Walk(driver.filePath, func(path string, info os.FileInfo, err error) error {
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// Check if a walking error occurred
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if err != nil {
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return err
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}
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// Only count JSON files
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if !strings.HasSuffix(info.Name(), ".json") {
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return nil
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}
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// Decode the file name
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decoded, err := base64.StdEncoding.DecodeString(strings.TrimSuffix(info.Name(), ".json"))
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if err != nil {
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return err
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}
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// Append the ID to the IDs slice
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ids = append(ids, string(decoded))
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return nil
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})
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if err != nil {
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return nil, err
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}
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// Return the IDs slice
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return ids, nil
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}
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// Get loads a paste
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func (driver *FileDriver) Get(id string) (*shared.Paste, error) {
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// Read the file
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id = base64.StdEncoding.EncodeToString([]byte(id))
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data, err := ioutil.ReadFile(filepath.Join(driver.filePath, id+".json"))
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if err != nil {
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if os.IsNotExist(err) {
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return nil, nil
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}
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return nil, err
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}
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// Unmarshal the file into a paste
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paste := new(shared.Paste)
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err = json.Unmarshal(data, &paste)
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if err != nil {
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return nil, err
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}
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return paste, nil
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}
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// Save saves a paste
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func (driver *FileDriver) Save(paste *shared.Paste) error {
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// Marshal the paste
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jsonBytes, err := json.Marshal(paste)
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if err != nil {
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return err
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}
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// Create the file to save the paste to
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id := base64.StdEncoding.EncodeToString([]byte(paste.ID))
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file, err := os.Create(filepath.Join(driver.filePath, id+".json"))
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if err != nil {
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return err
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}
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defer file.Close()
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// Write the JSON data into the file
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_, err = file.Write(jsonBytes)
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return err
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}
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// Delete deletes a paste
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func (driver *FileDriver) Delete(id string) error {
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id = base64.StdEncoding.EncodeToString([]byte(id))
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return os.Remove(filepath.Join(driver.filePath, id+".json"))
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}
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// Cleanup cleans up the expired pastes
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func (driver *FileDriver) Cleanup() (int, error) {
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// Retrieve all paste IDs
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ids, err := driver.ListIDs()
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if err != nil {
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return 0, err
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}
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// Define the amount of deleted items
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deleted := 0
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// Loop through all pastes
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for _, id := range ids {
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// Retrieve the paste object
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paste, err := driver.Get(id)
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if err != nil {
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return deleted, err
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}
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// Delete the paste if it is expired
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lifetime := config.Current.AutoDelete.Lifetime
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if paste.AutoDelete && paste.Created+int64(lifetime.Seconds()) < time.Now().Unix() {
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err = driver.Delete(id)
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if err != nil {
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return deleted, err
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}
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deleted++
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}
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}
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return deleted, nil
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}
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