/
tmpl.go
98 lines (87 loc) · 2.01 KB
/
tmpl.go
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package criers
import (
"bytes"
"encoding/json"
"text/template"
"github.com/Masterminds/sprig"
)
func GetString(data []byte, text string) (string, error) {
tmpl, err := template.New("template").Funcs(sprig.TxtFuncMap()).Parse(text)
if err != nil {
return "", nil
}
buf := new(bytes.Buffer)
// TODO: Should we send event directly or more events?
err = tmpl.Execute(buf, data)
if err != nil {
return "", err
}
return buf.String(), nil
}
func convertLayoutTemplate(layout map[string]interface{}, data []byte) (map[string]interface{}, error) {
result := make(map[string]interface{})
for key, value := range layout {
m, err := convertTemplate(value, data)
if err != nil {
return nil, err
}
result[key] = m
}
return result, nil
}
func convertTemplate(value interface{}, data []byte) (interface{}, error) {
switch v := value.(type) {
case string:
rendered, err := GetString(data, v)
if err != nil {
return nil, err
}
return rendered, nil
case map[interface{}]interface{}:
strKeysMap := make(map[string]interface{})
for k, v := range v {
res, err := convertTemplate(v, data)
if err != nil {
return nil, err
}
// TODO: It's a bit dangerous
strKeysMap[k.(string)] = res
}
return strKeysMap, nil
case map[string]interface{}:
strKeysMap := make(map[string]interface{})
for k, v := range v {
res, err := convertTemplate(v, data)
if err != nil {
return nil, err
}
strKeysMap[k] = res
}
return strKeysMap, nil
case []interface{}:
listConf := make([]interface{}, len(v))
for i := range v {
t, err := convertTemplate(v[i], data)
if err != nil {
return nil, err
}
listConf[i] = t
}
return listConf, nil
}
return nil, nil
}
func serializeEventWithLayout(layout map[string]interface{}, data []byte) ([]byte, error) {
var toSend []byte
if layout != nil {
res, err := convertLayoutTemplate(layout, data)
if err != nil {
return nil, err
}
toSend, err = json.Marshal(res)
if err != nil {
return nil, err
}
}
return toSend, nil
}