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|
package dasel
import (
"errors"
"fmt"
)
var OrDefaultFunc = BasicFunction{
name: "orDefault",
runFn: func(c *Context, s *Step, args []string) (Values, error) {
if err := requireExactlyXArgs("orDefault", args, 2); err != nil {
return nil, err
}
input := s.inputs()
if c.CreateWhenMissing() {
input = input.initEmptydencodingMaps()
}
runSubselect := func(value Value, selector string, defaultSelector string) (Value, error) {
gotValues, err := c.subSelect(value, selector)
notFound := false
if err != nil {
if errors.Is(err, &ErrPropertyNotFound{}) {
notFound = true
} else if errors.Is(err, &ErrIndexNotFound{Index: -1}) {
notFound = true
} else {
return Value{}, err
}
}
if !notFound {
// Check result of first query
if len(gotValues) != 1 {
return Value{}, fmt.Errorf("orDefault expects selector to return exactly 1 value")
}
// Consider nil values as not found
if gotValues[0].IsNil() {
notFound = true
}
}
if notFound {
gotValues, err = c.subSelect(value, defaultSelector)
if err != nil {
return Value{}, err
}
if len(gotValues) != 1 {
return Value{}, fmt.Errorf("orDefault expects selector to return exactly 1 value")
}
}
return gotValues[0], nil
}
res := make(Values, 0)
for _, val := range input {
resolvedValue, err := runSubselect(val, args[0], args[1])
if err != nil {
return nil, err
}
res = append(res, resolvedValue)
}
return res, nil
},
}
|
