-
Notifications
You must be signed in to change notification settings - Fork 5
/
CamelToSnakeFilter.scala
42 lines (38 loc) · 1.56 KB
/
CamelToSnakeFilter.scala
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
/*
* Copyright (c) 2021 Typelevel
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package fabric.filter
import fabric.{Obj, Json}
/**
* Converts camelCase to snake_case in obj keys
*/
object CamelToSnakeFilter extends ValueFilter {
override def apply(value: Json): Option[Json] = value match {
case Obj(map) =>
Some(Obj(map.map { case (key, value) =>
toSnake(key) -> value
}))
case _ => Some(value)
}
def toSnake(key: String): String = key.flatMap {
case c if c.isUpper => s"_${c.toLower}"
case c => c.toString
}
}