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65 lines
1.2 KiB
65 lines
1.2 KiB
package json
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import (
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"context"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"github.com/tidwall/gjson"
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"gitoa.ru/go-4devs/config"
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"gitoa.ru/go-4devs/config/value"
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)
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const (
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Name = "json"
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Separator = "."
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)
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var _ config.Provider = (*Provider)(nil)
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func New(json []byte, opts ...Option) *Provider {
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provider := Provider{
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key: func(s ...string) string {
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return strings.Join(s, Separator)
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},
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data: json,
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}
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for _, opt := range opts {
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opt(&provider)
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}
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return &provider
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}
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func NewFile(path string, opts ...Option) (*Provider, error) {
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file, err := os.ReadFile(filepath.Clean(path))
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if err != nil {
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return nil, fmt.Errorf("%w: unable to read config file %#q: file not found or unreadable", err, path)
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}
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return New(file, opts...), nil
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}
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type Option func(*Provider)
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type Provider struct {
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data []byte
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key func(...string) string
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name string
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}
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func (p *Provider) Name() string {
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return p.name
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}
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func (p *Provider) Value(_ context.Context, path ...string) (config.Value, error) {
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key := p.key(path...)
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if val := gjson.GetBytes(p.data, key); val.Exists() {
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return value.JString(val.String()), nil
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}
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return nil, fmt.Errorf("%v:%w", p.Name(), config.ErrValueNotFound)
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}
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