refactor: logparser v5 to pkgs

logparser/v5/pipe/textreport.go

@@ -0,0 +1,65 @@
+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package pipe
+
+import (
+	"fmt"
+	"io"
+	"text/tabwriter"
+)
+
+const (
+	minWidth = 0
+	tabWidth = 4
+	padding  = 4
+	flags    = 0
+)
+
+// TextReport report generator.
+type TextReport struct {
+	w io.Writer
+}
+
+// NewTextReport returns a TextReport report generator.
+func NewTextReport(w io.Writer) *TextReport {
+	return &TextReport{w: w}
+}
+
+// Consume generates a text report.
+func (t *TextReport) Consume(records Iterator) error {
+	w := tabwriter.NewWriter(t.w, minWidth, tabWidth, padding, ' ', flags)
+
+	write := fmt.Fprintf
+
+	write(w, "DOMAINS\tPAGES\tVISITS\tUNIQUES\n")
+	write(w, "-------\t-----\t------\t-------\n")
+
+	var total Record
+
+	err := records.Each(func(r Record) error {
+		total = r.Sum(total)
+
+		write(w, "%s\t%s\t%d\t%d\n",
+			r.Domain, r.Page,
+			r.Visits, r.Uniques,
+		)
+
+		return nil
+	})
+	if err != nil {
+		return err
+	}
+
+	write(w, "\t\t\t\n")
+	write(w, "%s\t%s\t%d\t%d\n", "TOTAL", "",
+		total.Visits,
+		total.Uniques,
+	)
+
+	return w.Flush()
+}