MaysWind
57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
package gnucash
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import (
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"bytes"
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"compress/gzip"
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"encoding/xml"
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"golang.org/x/net/html/charset"
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"github.com/mayswind/ezbookkeeping/pkg/core"
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"github.com/mayswind/ezbookkeeping/pkg/errs"
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)
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// gnucashDatabaseReader defines the structure of gnucash database reader
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type gnucashDatabaseReader struct {
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xmlDecoder *xml.Decoder
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}
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// read returns the imported gnucash data
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func (r *gnucashDatabaseReader) read(ctx core.Context) (*gnucashDatabase, error) {
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database := &gnucashDatabase{}
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err := r.xmlDecoder.Decode(&database)
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if err != nil {
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return nil, err
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}
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return database, nil
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}
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func createNewGnuCashDatabaseReader(data []byte) (*gnucashDatabaseReader, error) {
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if len(data) > 2 && data[0] == 0x1F && data[1] == 0x8B { // gzip magic number
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gzipReader, err := gzip.NewReader(bytes.NewReader(data))
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if err != nil {
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return nil, err
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}
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xmlDecoder := xml.NewDecoder(gzipReader)
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xmlDecoder.CharsetReader = charset.NewReaderLabel
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return &gnucashDatabaseReader{
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xmlDecoder: xmlDecoder,
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}, nil
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} else if len(data) > 5 && data[0] == 0x3C && data[1] == 0x3F && data[2] == 0x78 && data[3] == 0x6D && data[4] == 0x6C { // <?xml
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xmlDecoder := xml.NewDecoder(bytes.NewReader(data))
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xmlDecoder.CharsetReader = charset.NewReaderLabel
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return &gnucashDatabaseReader{
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xmlDecoder: xmlDecoder,
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}, nil
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}
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return nil, errs.ErrInvalidGnuCashFile
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}
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