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2f2dfd6e47
- Implement `sq diff --data`.
143 lines
3.0 KiB
Go
143 lines
3.0 KiB
Go
// Package markdownw implements writers for Markdown.
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package markdownw
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import (
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"bytes"
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"encoding/base64"
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"fmt"
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"html"
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"io"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/neilotoole/sq/libsq/core/record"
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"github.com/neilotoole/sq/cli/output"
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"github.com/neilotoole/sq/libsq/core/kind"
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"github.com/neilotoole/sq/libsq/core/stringz"
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)
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// RecordWriter implements output.RecordWriter.
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type RecordWriter struct {
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mu sync.Mutex
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recMeta record.Meta
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pr *output.Printing
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out io.Writer
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buf *bytes.Buffer
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}
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var _ output.NewRecordWriterFunc = NewRecordWriter
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// NewRecordWriter returns a writer instance.
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func NewRecordWriter(out io.Writer, pr *output.Printing) output.RecordWriter {
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return &RecordWriter{out: out, pr: pr}
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}
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// Open implements output.RecordWriter.
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func (w *RecordWriter) Open(recMeta record.Meta) error {
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w.recMeta = recMeta
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w.buf = &bytes.Buffer{}
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// Write the header
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for i, field := range recMeta {
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w.buf.WriteString("| ")
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w.buf.WriteString(field.Name() + " ")
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if i == len(recMeta)-1 {
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w.buf.WriteString("|\n")
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}
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}
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// Write the header separator row
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for i := range recMeta {
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w.buf.WriteString("| --- ")
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if i == len(recMeta)-1 {
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w.buf.WriteString("|\n")
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}
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}
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return nil
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}
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// Flush implements output.RecordWriter.
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func (w *RecordWriter) Flush() error {
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_, err := w.buf.WriteTo(w.out) // resets buf
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return err
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}
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// Close implements output.RecordWriter.
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func (w *RecordWriter) Close() error {
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return w.Flush()
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}
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func (w *RecordWriter) writeRecord(rec record.Record) error {
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var s string
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for i, field := range rec {
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w.buf.WriteString("| ")
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switch val := field.(type) {
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default:
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// should never happen
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s = escapeMarkdown(fmt.Sprintf("%v", val))
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case nil:
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// nil is rendered as empty string, which this cell already is
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case *int64:
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s = strconv.FormatInt(*val, 10)
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case *string:
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s = escapeMarkdown(*val)
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case *bool:
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s = strconv.FormatBool(*val)
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case *float64:
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s = stringz.FormatFloat(*val)
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case *[]byte:
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s = base64.StdEncoding.EncodeToString(*val)
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case *time.Time:
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switch w.recMeta[i].Kind() { //nolint:exhaustive
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default:
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s = w.pr.FormatDatetime(*val)
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case kind.Time:
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s = w.pr.FormatTime(*val)
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case kind.Date:
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s = w.pr.FormatDate(*val)
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}
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}
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w.buf.WriteString(s + " ")
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}
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w.buf.WriteString("|\n")
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return nil
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}
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// WriteRecords implements output.RecordWriter.
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func (w *RecordWriter) WriteRecords(recs []record.Record) error {
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w.mu.Lock()
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defer w.mu.Unlock()
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var err error
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for _, rec := range recs {
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err = w.writeRecord(rec)
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if 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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// escapeMarkdown is quick effort at escaping markdown
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// table cell text. It is not at all tested. Replace this
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// function with a real library call at the earliest opportunity.
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func escapeMarkdown(s string) string {
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s = html.EscapeString(s)
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s = strings.ReplaceAll(s, "|", "|")
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s = strings.ReplaceAll(s, "\r\n", "<br/>")
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s = strings.ReplaceAll(s, "\n", "<br/>")
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return s
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}
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