79 lines
1.4 KiB
Go
79 lines
1.4 KiB
Go
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package mmkv
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import (
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"fmt"
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"os"
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"path"
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)
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const (
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DefaultVaultID = "mmkv.default"
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)
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type manager struct {
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dir string
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vaults map[string]Vault
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}
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// NewManager creates a new MMKV Manager.
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func NewManager(dir string) (Manager, error) {
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// check dir exists
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info, err := os.Stat(dir)
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if err != nil {
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return nil, fmt.Errorf("failed to stat dir: %w", err)
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}
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if !info.IsDir() {
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return nil, fmt.Errorf("not a directory")
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}
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return &manager{
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dir: dir,
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vaults: make(map[string]Vault),
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}, nil
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}
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func (m *manager) OpenVault(id string) (Vault, error) {
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if id == "" {
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id = DefaultVaultID
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}
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if v, ok := m.vaults[id]; ok {
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return v, nil
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}
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vault, err := m.openVault(id)
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if err != nil {
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return nil, fmt.Errorf("failed to open vault: %w", err)
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}
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m.vaults[id] = vault
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return vault, nil
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}
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func (m *manager) openVault(id string) (Vault, error) {
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metaFile, err := os.Open(path.Join(m.dir, id+".crc"))
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if err != nil {
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return nil, fmt.Errorf("failed to open metadata file: %w", err)
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}
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defer metaFile.Close()
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vaultFile, err := os.Open(path.Join(m.dir, id))
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if err != nil {
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return nil, fmt.Errorf("failed to open vault file: %w", err)
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}
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defer vaultFile.Close()
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meta, err := loadMetadata(metaFile)
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if err != nil {
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return nil, fmt.Errorf("failed to load metadata: %w", err)
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}
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v, err := loadVault(vaultFile, meta)
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if err != nil {
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return nil, fmt.Errorf("failed to load vault: %w", err)
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}
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return v, nil
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}
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