forked from ponzu-cms/ponzu
/
config.go
267 lines (217 loc) · 5.02 KB
/
config.go
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package db
import (
"bytes"
"encoding/json"
"fmt"
"net/url"
"strings"
"sync"
"github.com/ponzu-cms/ponzu/system/admin/config"
"github.com/boltdb/bolt"
"github.com/gorilla/schema"
)
const (
// DefaultMaxAge provides a 2592000 second (30-day) cache max-age setting
DefaultMaxAge = int64(60 * 60 * 24 * 30)
)
var mu = &sync.Mutex{}
var configCache map[string]interface{}
func init() {
configCache = make(map[string]interface{})
}
// SetConfig sets key:value pairs in the db for configuration settings
func SetConfig(data url.Values) error {
var j []byte
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}
fieldOrderValue := make(map[string]map[string][]string)
for k, v := range data {
if strings.Contains(k, ".") {
fo := strings.Split(k, ".")
// put the order and the field value into map
field := string(fo[0])
order := string(fo[1])
if len(fieldOrderValue[field]) == 0 {
fieldOrderValue[field] = make(map[string][]string)
}
// orderValue is 0:[?type=Thing&id=1]
orderValue := fieldOrderValue[field]
orderValue[order] = v
fieldOrderValue[field] = orderValue
// discard the post form value with name.N
data.Del(k)
}
}
// add/set the key & value to the post form in order
for f, ov := range fieldOrderValue {
for i := 0; i < len(ov); i++ {
position := fmt.Sprintf("%d", i)
fieldValue := ov[position]
if data.Get(f) == "" {
for i, fv := range fieldValue {
if i == 0 {
data.Set(f, fv)
} else {
data.Add(f, fv)
}
}
} else {
for _, fv := range fieldValue {
data.Add(f, fv)
}
}
}
}
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
}
// convert json => map[string]interface{}
var kv map[string]interface{}
err = json.Unmarshal(j, &kv)
if err != nil {
return err
}
mu.Lock()
configCache = kv
mu.Unlock()
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"))
if b == nil {
return fmt.Errorf("Error finding bucket: %s", "__config")
}
_, err := val.Write(b.Get([]byte("settings")))
if err != nil {
return err
}
return nil
})
if err != nil {
return nil, err
}
return val.Bytes(), nil
}
// PutConfig updates a single k/v in the config
func PutConfig(key string, value interface{}) error {
kv := make(map[string]interface{})
c, err := ConfigAll()
if err != nil {
return err
}
if c == nil {
c, err = emptyConfig()
if err != nil {
return err
}
}
err = json.Unmarshal(c, &kv)
if err != nil {
return err
}
// set k/v from params to decoded map
kv[key] = value
data := make(url.Values)
for k, v := range kv {
switch v.(type) {
case string:
data.Set(k, v.(string))
case []string:
vv := v.([]string)
for i := range vv {
data.Add(k, vv[i])
}
default:
data.Set(k, fmt.Sprintf("%v", v))
}
}
err = SetConfig(data)
if err != nil {
return err
}
return nil
}
// ConfigCache is a in-memory cache of the Configs for quicker lookups
// 'key' is the JSON tag associated with the config field
func ConfigCache(key string) interface{} {
mu.Lock()
val := configCache[key]
mu.Unlock()
return val
}
// LoadCacheConfig loads the config into a cache to be accessed by ConfigCache()
func LoadCacheConfig() error {
c, err := ConfigAll()
if err != nil {
return err
}
if c == nil {
c, err = emptyConfig()
if err != nil {
return err
}
}
// convert json => map[string]interface{}
var kv map[string]interface{}
err = json.Unmarshal(c, &kv)
if err != nil {
return err
}
mu.Lock()
configCache = kv
mu.Unlock()
return nil
}
func emptyConfig() ([]byte, error) {
cfg := &config.Config{}
data, err := json.Marshal(cfg)
if err != nil {
return nil, err
}
return data, nil
}