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// Copyright 2018 The CUE Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package csv
import (
"encoding/csv"
"io"
"strings"
"cuelang.org/go/cue"
)
// Encode encode the given list of lists to CSV.
func Encode(x cue.Value) (string, error) {
var b strings.Builder
w := csv.NewWriter(&b)
iter, err := x.List()
if err != nil {
return "", err
}
for iter.Next() {
row, err := iter.Value().List()
if err != nil {
return "", err
}
a := []string{}
for row.Next() {
col := row.Value()
if str, err := col.String(); err == nil {
a = append(a, str)
} else {
b, err := col.MarshalJSON()
if err != nil {
return "", err
}
a = append(a, string(b))
}
}
_ = w.Write(a)
}
w.Flush()
return b.String(), nil
}
// Decode reads in a csv into a list of lists.
func Decode(r io.Reader) ([][]string, error) {
return csv.NewReader(r).ReadAll()
}
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