mirror of https://github.com/databricks/cli.git
78 lines
2.1 KiB
Go
78 lines
2.1 KiB
Go
package dyn
|
||
|
||
import (
|
||
"fmt"
|
||
"maps"
|
||
"slices"
|
||
)
|
||
|
||
// MapFunc is a function that maps a value to another value.
|
||
type MapFunc func(Value) (Value, error)
|
||
|
||
// Foreach returns a [MapFunc] that applies the specified [MapFunc] to each
|
||
// value in a map or sequence and returns the new map or sequence.
|
||
func Foreach(fn MapFunc) MapFunc {
|
||
return func(v Value) (Value, error) {
|
||
switch v.Kind() {
|
||
case KindMap:
|
||
m := maps.Clone(v.MustMap())
|
||
for key, value := range m {
|
||
var err error
|
||
m[key], err = fn(value)
|
||
if err != nil {
|
||
return InvalidValue, err
|
||
}
|
||
}
|
||
return NewValue(m, v.Location()), nil
|
||
case KindSequence:
|
||
s := slices.Clone(v.MustSequence())
|
||
for i, value := range s {
|
||
var err error
|
||
s[i], err = fn(value)
|
||
if err != nil {
|
||
return InvalidValue, err
|
||
}
|
||
}
|
||
return NewValue(s, v.Location()), nil
|
||
default:
|
||
return InvalidValue, fmt.Errorf("expected a map or sequence, found %s", v.Kind())
|
||
}
|
||
}
|
||
}
|
||
|
||
// Map applies the given function to the value at the specified path in the specified value.
|
||
// It is identical to [MapByPath], except that it takes a string path instead of a [Path].
|
||
func Map(v Value, path string, fn MapFunc) (Value, error) {
|
||
p, err := NewPathFromString(path)
|
||
if err != nil {
|
||
return InvalidValue, err
|
||
}
|
||
return MapByPath(v, p, fn)
|
||
}
|
||
|
||
// Map applies the given function to the value at the specified path in the specified value.
|
||
// If successful, it returns the new value with all intermediate values copied and updated.
|
||
//
|
||
// If the path contains a key that doesn't exist, or an index that is out of bounds,
|
||
// it returns the original value and no error. This is because setting a value at a path
|
||
// that doesn't exist is a no-op.
|
||
//
|
||
// If the path is invalid for the given value, it returns InvalidValue and an error.
|
||
func MapByPath(v Value, p Path, fn MapFunc) (Value, error) {
|
||
nv, err := visit(v, EmptyPath, p, visitOptions{
|
||
fn: fn,
|
||
})
|
||
|
||
// Check for success.
|
||
if err == nil {
|
||
return nv, nil
|
||
}
|
||
|
||
// Return original value if a key or index is missing.
|
||
if IsNoSuchKeyError(err) || IsIndexOutOfBoundsError(err) {
|
||
return v, nil
|
||
}
|
||
|
||
return nv, err
|
||
}
|