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table_open.go
61 lines (47 loc) · 1.17 KB
/
table_open.go
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package yti
import (
"errors"
"io"
"os"
"gopkg.in/yaml.v3"
)
func Open[I Item](input io.Reader, options *TableOptions[I]) (*Table[I], error) {
table := &Table[I]{
options: options,
}
err := yaml.NewDecoder(input).Decode(&table.items)
if err != nil {
return nil, errors.Join(err, ErrLoadingTable)
}
if err = table.indexItems(); err != nil {
return nil, err
}
return table, nil
}
func OpenFile[I Item](filePath string, options *TableOptions[I]) (*Table[I], error) {
file, err := os.Open(filePath)
// should we error out when the file does not exist ?
var fileDoesNotExist = os.IsNotExist(err)
if fileDoesNotExist && options != nil && options.MustExist {
return nil, err
}
// no. let's just treat it as empty
defer file.Close()
table := &Table[I]{
options: options,
filePath: filePath,
fileDoesNotExist: fileDoesNotExist,
items: nil,
}
// if the file does not exist don't bother decoding it to slice
if !fileDoesNotExist {
err = yaml.NewDecoder(file).Decode(&table.items)
if err != nil {
return nil, ErrLoadingTable
}
if err = table.indexItems(); err != nil {
return nil, err
}
}
return table, nil
}