Ilia Denisov
49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
package storage
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import (
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"errors"
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"fmt"
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"galaxy/util"
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"path/filepath"
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)
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const (
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// Name of the file under the storage's root where [model.State] is stored.
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stateFileName = "state.dat"
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// Suffix of a Game's file inder the storage's root where [model.GameData] is stored.
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gameDataFileSuffix = ".dat"
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)
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type storage struct {
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root string
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}
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// NewStorage returns implementation of the "galaxy/client.Storage" interface
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// or nil with a non-nil error when filesystem storage initialisation failed.
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func NewStorage(rootPath string) (*storage, error) {
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ok, err := util.Writable(rootPath)
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if err != nil {
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return nil, err
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}
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if !ok {
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return nil, errors.New("user does not have write permissions to the storage root")
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}
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s := &storage{
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root: rootPath,
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}
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return s, nil
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}
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// StateFilePath returns client's state file path relative to the root,
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// file name and extension are pre-defined constant.
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func StateFilePath(root string) string {
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return filepath.Join(root, stateFileName)
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}
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// GameDataPath returns game's data file path relative to the root,
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// data file name is GameID string representation and extension is a pre-defined constant.
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func GameDataFilePath(root string, id fmt.Stringer) string {
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return filepath.Join(root, id.String()) + gameDataFileSuffix
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}
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