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convert.go
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convert.go
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package edit
import (
"time"
"github.com/cybozu-go/kkok"
"github.com/pkg/errors"
"github.com/robertkrimen/otto"
)
var convertScript *otto.Script
func toObject(a *kkok.Alert) (*otto.Object, error) {
vm := kkok.NewVM()
val, err := vm.EvalAlert(a, convertScript)
if err != nil {
return nil, err
}
return val.Object(), nil
}
func fromObject(obj *otto.Object) (*kkok.Alert, error) {
i, err := obj.Value().Export()
if err != nil {
return nil, err
}
a := &kkok.Alert{}
for k, v := range i.(map[string]interface{}) {
switch k {
case "From":
s, ok := v.(string)
if !ok {
return nil, errors.New("From is not a string")
}
a.From = s
case "Date":
v, err := obj.Get("Date")
if err != nil {
return nil, err // unlikely
}
if !v.IsObject() {
return nil, errors.New("Date is not a JavaScript object")
}
val, err := v.Object().Call("toISOString")
if err != nil {
return nil, errors.Wrap(err, "Date is not a JavaScript Date")
}
dt, err := time.Parse(time.RFC3339Nano, val.String())
if err != nil {
return nil, errors.Wrap(err, "time.Parse")
}
a.Date = dt
case "Host":
s, ok := v.(string)
if !ok {
return nil, errors.New("Host is not a string")
}
a.Host = s
case "Title":
s, ok := v.(string)
if !ok {
return nil, errors.New("Title is not a string")
}
a.Title = s
case "Message":
s, ok := v.(string)
if !ok {
return nil, errors.New("Message is not a string")
}
a.Message = s
case "Routes":
il, ok := v.([]interface{})
if ok && len(il) == 0 {
break
}
sl, ok := v.([]string)
if !ok {
return nil, errors.New("Routes is not []string")
}
a.Routes = sl
case "Info":
m, ok := v.(map[string]interface{})
if !ok {
return nil, errors.New("Info is not map[string]interface{}")
}
for kk, vv := range m {
if i64, ok := vv.(int64); ok {
m[kk] = int(i64)
}
}
a.Info = m
case "Stats":
m, ok := v.(map[string]interface{})
if !ok {
return nil, errors.New("Stats is not map[string]interface{}")
}
mf := make(map[string]float64, len(m))
for kk, vv := range m {
switch vv := vv.(type) {
case float64:
mf[kk] = vv
case int64:
mf[kk] = float64(vv)
case int:
mf[kk] = float64(vv)
default:
return nil, errors.New("non-integer value in Stats")
}
}
a.Stats = mf
case "Sub":
sub, ok := v.([]*kkok.Alert)
if ok {
a.Sub = sub
}
// ignore otherwise
}
}
err = a.Validate()
if err != nil {
return nil, err
}
return a, nil
}
func init() {
s, err := kkok.CompileJS(`
routes = new Array();
for( i = 0; i < alert.Routes.length; i++) {
routes.push(alert.Routes[i]);
}
info = {}
for (var k in alert.Info) {
info[k] = alert.Info[k];
}
stats = {}
for (var k in alert.Stats) {
stats[k] = alert.Stats[k]
}
sub = new Array();
for( i = 0; i < alert.Sub.length; i++) {
sub.push(alert.Sub[i]);
}
({
"From": alert.From,
"Date": new Date(alert.Date.UTC().Format("2006-01-02T15:04:05.000Z07:00")),
"Host": alert.Host,
"Title": alert.Title,
"Message": alert.Message,
"Routes": routes,
"Info": info,
"Stats": stats,
"Sub": sub,
})`)
if err != nil {
panic(err)
}
convertScript = s
}