yq/pkg/yqlib/decoder_csv_object.go

82 lines
1.9 KiB
Go

package yqlib
import (
"encoding/csv"
"errors"
"io"
"github.com/dimchansky/utfbom"
yaml "gopkg.in/yaml.v3"
)
type csvObjectDecoder struct {
separator rune
reader csv.Reader
finished bool
}
func NewCSVObjectDecoder(separator rune) Decoder {
return &csvObjectDecoder{separator: separator}
}
func (dec *csvObjectDecoder) Init(reader io.Reader) error {
cleanReader, enc := utfbom.Skip(reader)
log.Debugf("Detected encoding: %s\n", enc)
dec.reader = *csv.NewReader(cleanReader)
dec.reader.Comma = dec.separator
dec.finished = false
return nil
}
func (dec *csvObjectDecoder) convertToYamlNode(content string) *yaml.Node {
node, err := parseSnippet(content)
if err != nil {
return createScalarNode(content, content)
}
return node
}
func (dec *csvObjectDecoder) createObject(headerRow []string, contentRow []string) *yaml.Node {
objectNode := &yaml.Node{Kind: yaml.MappingNode, Tag: "!!map"}
for i, header := range headerRow {
objectNode.Content = append(
objectNode.Content,
createScalarNode(header, header),
dec.convertToYamlNode(contentRow[i]))
}
return objectNode
}
func (dec *csvObjectDecoder) Decode() (*CandidateNode, error) {
if dec.finished {
return nil, io.EOF
}
headerRow, err := dec.reader.Read()
log.Debugf(": headerRow%v", headerRow)
if err != nil {
return nil, err
}
rootArray := &yaml.Node{Kind: yaml.SequenceNode, Tag: "!!seq"}
contentRow, err := dec.reader.Read()
for err == nil && len(contentRow) > 0 {
log.Debugf("Adding contentRow: %v", contentRow)
rootArray.Content = append(rootArray.Content, dec.createObject(headerRow, contentRow))
contentRow, err = dec.reader.Read()
log.Debugf("Read next contentRow: %v, %v", contentRow, err)
}
if !errors.Is(err, io.EOF) {
return nil, err
}
return &CandidateNode{
Node: &yaml.Node{
Kind: yaml.DocumentNode,
Content: []*yaml.Node{rootArray},
},
}, nil
}