67 lines
1.3 KiB
Go
67 lines
1.3 KiB
Go
|
package cache
|
||
|
|
|
||
|
|
import (
|
||
|
|
"encoding/json"
|
||
|
|
"fmt"
|
||
|
|
"log/slog"
|
||
|
|
"os"
|
||
|
|
"path"
|
||
|
|
|
||
|
|
"dario.cat/mergo"
|
||
|
|
"go.xsfx.dev/glucose_exporter/internal/config"
|
||
|
|
"go.xsfx.dev/glucose_exporter/internal/epoch"
|
||
|
|
)
|
||
|
|
|
||
|
|
const cacheFile = "cache.json"
|
||
|
|
|
||
|
|
type Cache struct {
|
||
|
|
JWT string `json:"jwt,omitempty"`
|
||
|
|
Expires epoch.Epoch `json:"expires,omitempty"`
|
||
|
|
BaseURL string `json:"base_url,omitempty"`
|
||
|
|
}
|
||
|
|
|
||
|
|
func FullPath() string {
|
||
|
|
return path.Join(config.Cfg.CacheDir, cacheFile)
|
||
|
|
}
|
||
|
|
|
||
|
|
func Load() (Cache, error) {
|
||
|
|
var c Cache
|
||
|
|
|
||
|
|
slog.Debug("reading cache", "file", FullPath())
|
||
|
|
|
||
|
|
b, err := os.ReadFile(FullPath())
|
||
|
|
if err != nil {
|
||
|
|
return Cache{}, fmt.Errorf("reading cache file: %w", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
if err := json.Unmarshal(b, &c); err != nil {
|
||
|
|
return Cache{}, fmt.Errorf("unmarshal cache: %w", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
return c, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func Save(c Cache) error {
|
||
|
|
slog.Debug("writing cache", "file", FullPath())
|
||
|
|
|
||
|
|
s, err := Load()
|
||
|
|
if err != nil {
|
||
|
|
return fmt.Errorf("loading cache: %w", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
if err := mergo.Merge(&s, c, mergo.WithOverride); err != nil {
|
||
|
|
return fmt.Errorf("merging cache: %w", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
b, err := json.MarshalIndent(s, "", " ")
|
||
|
|
if err != nil {
|
||
|
|
return fmt.Errorf("marshalling cache: %w", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
if err := os.WriteFile(FullPath(), b, 0o600); err != nil {
|
||
|
|
return fmt.Errorf("writing cache file: %w", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|