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package jsonl |
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import ( |
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"adrianolaselva.github.io/csvql/pkg/exportdata" |
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"bytes" |
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"database/sql" |
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"encoding/json" |
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"fmt" |
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"github.com/schollz/progressbar/v3" |
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"os" |
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"path/filepath" |
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) |
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const ( |
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fileModeDefault os.FileMode = 0644 |
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) |
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type jsonlExport struct { |
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rows *sql.Rows |
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bar *progressbar.ProgressBar |
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exportPath string |
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} |
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func NewJsonlExport(rows *sql.Rows, exportPath string, bar *progressbar.ProgressBar) exportdata.Export { |
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return &jsonlExport{rows: rows, exportPath: exportPath, bar: bar} |
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} |
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func (j *jsonlExport) Export() error { |
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columns, err := j.rows.Columns() |
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if err != nil { |
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return err |
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} |
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if err = os.MkdirAll(filepath.Dir(j.exportPath), os.ModePerm); err != nil { |
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return err |
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} |
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bufferRx, err := os.OpenFile(j.exportPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, fileModeDefault) |
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defer bufferRx.Close() |
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for j.rows.Next() { |
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j.bar.Add(1) |
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values := make([]interface{}, len(columns)) |
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pointers := make([]interface{}, len(columns)) |
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for i := range values { |
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pointers[i] = &values[i] |
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} |
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if err := j.rows.Scan(pointers...); err != nil { |
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return err |
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} |
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attr := map[string]interface{}{} |
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for i, c := range columns { |
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attr[c] = pointers[i] |
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} |
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payload, err := json.Marshal(attr) |
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if err != nil { |
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return err |
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} |
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buffer := new(bytes.Buffer) |
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if err := json.Compact(buffer, payload); err != nil { |
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return err |
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} |
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if _, err := bufferRx.WriteString(fmt.Sprintf("%s\n", buffer.String())); err != nil { |
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return err |
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} |
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} |
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return nil |
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} |
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adrianolaselva /
csvql
