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memory.go
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memory.go
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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
package config
import (
"fmt"
"github.com/pkg/errors"
"github.com/zacmm/zacmm-server/model"
)
// MemoryStore implements the Store interface. It is meant primarily for testing.
// Not to be used directly. Only to be used as a backing store for config.Store
type MemoryStore struct {
allowEnvironmentOverrides bool
validate bool
files map[string][]byte
savedConfig *model.Config
}
// MemoryStoreOptions makes configuration of the memory store explicit.
type MemoryStoreOptions struct {
IgnoreEnvironmentOverrides bool
SkipValidation bool
InitialConfig *model.Config
InitialFiles map[string][]byte
}
// NewMemoryStore creates a new MemoryStore instance with default options.
func NewMemoryStore() (*MemoryStore, error) {
return NewMemoryStoreWithOptions(&MemoryStoreOptions{})
}
// NewMemoryStoreWithOptions creates a new MemoryStore instance.
func NewMemoryStoreWithOptions(options *MemoryStoreOptions) (*MemoryStore, error) {
savedConfig := options.InitialConfig
if savedConfig == nil {
savedConfig = &model.Config{}
savedConfig.SetDefaults()
}
initialFiles := options.InitialFiles
if initialFiles == nil {
initialFiles = make(map[string][]byte)
}
ms := &MemoryStore{
allowEnvironmentOverrides: !options.IgnoreEnvironmentOverrides,
validate: !options.SkipValidation,
files: initialFiles,
savedConfig: savedConfig,
}
return ms, nil
}
// Set replaces the current configuration in its entirety.
func (ms *MemoryStore) Set(newCfg *model.Config) error {
return ms.persist(newCfg)
}
// persist copies the active config to the saved config.
func (ms *MemoryStore) persist(cfg *model.Config) error {
ms.savedConfig = cfg.Clone()
return nil
}
// Load applies environment overrides to the default config as if a re-load had occurred.
func (ms *MemoryStore) Load() ([]byte, error) {
cfgBytes, err := marshalConfig(ms.savedConfig)
if err != nil {
return nil, errors.Wrap(err, "failed to serialize config")
}
return cfgBytes, nil
}
// GetFile fetches the contents of a previously persisted configuration file.
func (ms *MemoryStore) GetFile(name string) ([]byte, error) {
data, ok := ms.files[name]
if !ok {
return nil, fmt.Errorf("file %s not stored", name)
}
return data, nil
}
// SetFile sets or replaces the contents of a configuration file.
func (ms *MemoryStore) SetFile(name string, data []byte) error {
ms.files[name] = data
return nil
}
// HasFile returns true if the given file was previously persisted.
func (ms *MemoryStore) HasFile(name string) (bool, error) {
_, ok := ms.files[name]
return ok, nil
}
// RemoveFile removes a previously persisted configuration file.
func (ms *MemoryStore) RemoveFile(name string) error {
delete(ms.files, name)
return nil
}
// String returns a hard-coded description, as there is no backing store.
func (ms *MemoryStore) String() string {
return "memory://"
}
// Close does nothing for a memory store.
func (ms *MemoryStore) Close() error {
return nil
}
// Watch nothing on memory store
func (ms *MemoryStore) Watch(_ func()) error {
return nil
}