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package db
import (
"bytes"
"encoding/base64"
"encoding/json"
"fmt"
"net/url"
"strings"
"time"
"github.com/bosssauce/ponzu/system/admin/config"
"github.com/boltdb/bolt"
"github.com/gorilla/schema"
)
var configCache url.Values
func init() {
configCache = make(url.Values)
}
// SetConfig sets key:value pairs in the db for configuration settings
func SetConfig(data url.Values) error {
err := store.Update(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("__config"))
// check for any multi-value fields (ex. checkbox fields)
// and correctly format for db storage. Essentially, we need
// fieldX.0: value1, fieldX.1: value2 => fieldX: []string{value1, value2}
var discardKeys []string
for k, v := range data {
if strings.Contains(k, ".") {
key := strings.Split(k, ".")[0]
if data.Get(key) == "" {
data.Set(key, v[0])
discardKeys = append(discardKeys, k)
} else {
data.Add(key, v[0])
}
}
}
for _, discardKey := range discardKeys {
data.Del(discardKey)
}
cfg := &config.Config{}
dec := schema.NewDecoder()
dec.SetAliasTag("json") // allows simpler struct tagging when creating a content type
dec.IgnoreUnknownKeys(true) // will skip over form values submitted, but not in struct
err := dec.Decode(cfg, data)
if err != nil {
return err
}
// check for "invalidate" value to reset the Etag
if len(cfg.CacheInvalidate) > 0 && cfg.CacheInvalidate[0] == "invalidate" {
cfg.Etag = NewEtag()
cfg.CacheInvalidate = []string{}
}
j, err := json.Marshal(cfg)
if err != nil {
return err
}
err = b.Put([]byte("settings"), j)
if err != nil {
return err
}
return nil
})
if err != nil {
return err
}
configCache = data
return nil
}
// Config gets the value of a key in the configuration from the db
func Config(key string) ([]byte, error) {
kv := make(map[string]interface{})
cfg, err := ConfigAll()
if err != nil {
return nil, err
}
if len(cfg) < 1 {
return nil, nil
}
err = json.Unmarshal(cfg, &kv)
if err != nil {
return nil, err
}
return []byte(kv[key].(string)), nil
}
// ConfigAll gets the configuration from the db
func ConfigAll() ([]byte, error) {
val := &bytes.Buffer{}
err := store.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("__config"))
val.Write(b.Get([]byte("settings")))
return nil
})
if err != nil {
return nil, err
}
return val.Bytes(), nil
}
// ConfigCache is a in-memory cache of the Configs for quicker lookups
func ConfigCache(key string) string {
return configCache.Get(key)
}
// NewEtag generates a new Etag for response caching
func NewEtag() string {
now := fmt.Sprintf("%d", time.Now().Unix())
etag := base64.StdEncoding.EncodeToString([]byte(now))
return etag
}
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