From 676d34ecd951bc46e8b3c8c7725e500b5e2d0b93 Mon Sep 17 00:00:00 2001
From: Ted Unangst <tedu@tedunangst.com>
Date: Wed, 1 Jan 2020 17:45:06 -0500
Subject: [PATCH] add basic support for tables

---
 docs/changelog.txt |  2 ++
 docs/honk.5        |  2 ++
 markitzero.go      | 22 ++++++++++++++++++++++
 markitzero_test.go | 12 ++++++++++++
 4 files changed, 38 insertions(+)

diff --git a/docs/changelog.txt b/docs/changelog.txt
index 31fc77f..5acd20d 100644
--- a/docs/changelog.txt
+++ b/docs/changelog.txt
@@ -2,6 +2,8 @@ changelog
 
 === next
 
++ Tables
+
 + Reduce retries talking to dumb servers.
 
 === 0.8.6 Sartorial Headpiece
diff --git a/docs/honk.5 b/docs/honk.5
index 0f0cf8e..f0dc1de 100644
--- a/docs/honk.5
+++ b/docs/honk.5
@@ -51,6 +51,8 @@ Lists of items starting with either
 .Sq +
 or
 .Sq - .
+.It tables
+Table cells separated by |.
 .It images
 Inline images with img tags.
 .Bd -literal
diff --git a/markitzero.go b/markitzero.go
index 464de15..0253a2f 100644
--- a/markitzero.go
+++ b/markitzero.go
@@ -34,6 +34,7 @@ var re_link = regexp.MustCompile(`.?.?https?://[^\s"]+[\w/)!]`)
 var re_zerolink = regexp.MustCompile(`\[([^]]*)\]\(([^)]*\)?)\)`)
 var re_imgfix = regexp.MustCompile(`<img ([^>]*)>`)
 var re_lister = regexp.MustCompile(`((^|\n)(\+|-).*)+\n?`)
+var re_tabler = regexp.MustCompile(`((^|\n)\|.*)+\n?`)
 
 var lighter = synlight.New(synlight.Options{Format: synlight.HTML})
 
@@ -92,6 +93,26 @@ func markitzero(s string) string {
 		r += "</ul><p>"
 		return r
 	})
+	s = re_tabler.ReplaceAllStringFunc(s, func(m string) string {
+		m = strings.Trim(m, "\n")
+		rows := strings.Split(m, "\n")
+		var r strings.Builder
+		r.WriteString("<table>")
+		for _, row := range rows {
+			r.WriteString("<tr>")
+			cells := strings.Split(row, "|")
+			for i, cell := range cells {
+				cell = strings.TrimSpace(cell)
+				if cell == "" && (i == 0 || i == len(cells)-1) {
+					continue
+				}
+				r.WriteString("<td>")
+				r.WriteString(cell)
+			}
+		}
+		r.WriteString("</table><p>")
+		return r.String()
+	})
 
 	// restore images
 	s = strings.Replace(s, "&lt;img x&gt;", "<img x>", -1)
@@ -122,6 +143,7 @@ func markitzero(s string) string {
 	s = strings.Replace(s, "<br><cite></cite>", "", -1)
 	s = strings.Replace(s, "<br><pre>", "<pre>", -1)
 	s = strings.Replace(s, "<br><ul>", "<ul>", -1)
+	s = strings.Replace(s, "<br><table>", "<table>", -1)
 	s = strings.Replace(s, "<p><br>", "<p>", -1)
 	return s
 }
diff --git a/markitzero_test.go b/markitzero_test.go
index 2f39fcb..208e159 100644
--- a/markitzero_test.go
+++ b/markitzero_test.go
@@ -108,6 +108,18 @@ para
 	doonezerotest(t, input, output)
 }
 
+func TestTables(t *testing.T) {
+	input := `hello
+
+| col1 | col 2 |
+| row2 | cell4 |
+
+para
+`
+	output := `hello<table><tr><td>col1<td>col 2<tr><td>row2<td>cell4</table><p>para`
+	doonezerotest(t, input, output)
+}
+
 var benchData, simpleData string
 
 func init() {