Added text output

Author: djthorpe

pkg/writer/text.go

@@ -0,0 +1,49 @@
+package writer
+
+import (
+	"fmt"
+	"io"
+	"strings"
+)
+
+///////////////////////////////////////////////////////////////////////////////
+// TYPES
+
+type TextWriter struct {
+	format string
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// CONSTRUCTOR
+
+// Write outputs the table to a writer
+func NewTextWriter(columns []ColumnMeta, delim rune) *TextWriter {
+	self := new(TextWriter)
+
+	// Create the format from the column metadata
+	f := new(strings.Builder)
+	f.WriteRune(delim)
+	for _, column := range columns {
+		f.WriteRune('%')
+		if column.Flags&FormatAlignLeft != 0 {
+			f.WriteRune('-')
+		}
+		if column.Width > 0 {
+			f.WriteString(fmt.Sprint(column.Width))
+		}
+		f.WriteRune('s')
+		f.WriteRune(delim)
+	}
+	self.format = f.String()
+	return self
+}
+
+func (self *TextWriter) Writeln(w io.Writer, elems []any) error {
+	if _, err := fmt.Fprintf(w, self.format, elems...); err != nil {
+		return err
+	}
+	if _, err := fmt.Fprintln(w); err != nil {
+		return err
+	}
+	return nil
+}