init

.gitignore

@@ -0,0 +1 @@
+cmd/gold/gold

go.mod

@@ -0,0 +1,9 @@
+module github.com/magicnumbers/gold
+
+go 1.13
+
+require (
+	github.com/logrusorgru/aurora v0.0.0-20191017060258-dc85c304c434
+	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
+	gopkg.in/russross/blackfriday.v2 v2.0.0
+)

go.sum

@@ -0,0 +1,6 @@
+github.com/logrusorgru/aurora v0.0.0-20191017060258-dc85c304c434 h1:im9kkmH0WWwxzegiv18gSUJbuXR9y028rXrWuPp6Jug=
+github.com/logrusorgru/aurora v0.0.0-20191017060258-dc85c304c434/go.mod h1:7rIyQOR62GCctdiQpZ/zOJlFyk6y+94wXzv6RNZgaR4=
+github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
+github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
+gopkg.in/russross/blackfriday.v2 v2.0.0 h1:+FlnIV8DSQnT7NZ43hcVKcdJdzZoeCmJj4Ql8gq5keA=
+gopkg.in/russross/blackfriday.v2 v2.0.0/go.mod h1:6sSBNz/GtOm/pJTuh5UmBK2ZHfmnxGbl2NZg1UliSOI=

gold.go

@@ -0,0 +1,166 @@
+package gold
+
+import (
+	"fmt"
+	"io"
+	"strconv"
+	"strings"
+
+	"github.com/logrusorgru/aurora"
+	bf "gopkg.in/russross/blackfriday.v2"
+)
+
+type RuleKey int
+
+const (
+	Color RuleKey = iota
+	BackgroundColor
+	Underline
+	Bold
+	Italic
+	CrossedOut
+	Faint
+	Conceal
+	Overlined
+	Inverse
+	Blink
+)
+
+type TermRenderer struct {
+	style map[bf.NodeType]map[RuleKey]string
+}
+
+func BaseString(node *bf.Node) string {
+	switch node.Type {
+	case bf.Document:
+		return ""
+	case bf.BlockQuote:
+		return fmt.Sprintf("```\n%s\n```", string(node.Literal))
+	case bf.List:
+		return ""
+	case bf.Item:
+		return fmt.Sprintf("* %s", string(node.Literal))
+	case bf.Paragraph:
+		if node.Prev != nil && node.Prev.Type != bf.Link {
+			return "\n"
+		} else {
+			return ""
+		}
+	case bf.Heading:
+		return fmt.Sprintf("%s ", strings.Repeat("#", node.HeadingData.Level))
+	case bf.HorizontalRule:
+		return "---\n"
+	case bf.Emph:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.Strong:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.Del:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.Link:
+		return fmt.Sprintf("[%s](%s)\n", string(node.LastChild.Literal), string(node.LinkData.Destination))
+	case bf.Image:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.Text:
+		if node.Parent != nil && node.Parent.Type != bf.Link {
+			return fmt.Sprintf("%s\n", string(node.Literal))
+		} else {
+			return ""
+		}
+	case bf.HTMLBlock:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.CodeBlock:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.Softbreak:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.Hardbreak:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.Code:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.HTMLSpan:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.Table:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.TableCell:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.TableHead:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.TableBody:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	case bf.TableRow:
+		return fmt.Sprintf("%s\n", string(node.Literal))
+	default:
+		return ""
+	}
+
+}
+
+func (tr *TermRenderer) RenderNode(w io.Writer, node *bf.Node, entering bool) bf.WalkStatus {
+	if !entering {
+		return bf.GoToNext
+	}
+	text := BaseString(node)
+	if text == "" {
+		return bf.GoToNext
+	}
+	rules := tr.style[node.Type]
+	if len(rules) == 0 {
+		fmt.Fprintf(w, "%s", text)
+		return bf.GoToNext
+	}
+	out := aurora.Reset(text)
+	if r, ok := rules[Color]; ok {
+		i, err := strconv.Atoi(r)
+		if err == nil && i >= 0 && i <= 255 {
+			out = out.Index(uint8(i))
+		}
+	}
+	if r, ok := rules[BackgroundColor]; ok {
+		i, err := strconv.Atoi(r)
+		if err == nil && i >= 0 && i <= 255 {
+			out = out.Index(uint8(i))
+		}
+	}
+	if r, ok := rules[Underline]; ok {
+		if r == "true" {
+			out = out.Underline()
+		}
+	}
+	if r, ok := rules[Bold]; ok {
+		if r == "true" {
+			out = out.Bold()
+		}
+	}
+	if r, ok := rules[Italic]; ok {
+		if r == "true" {
+			out = out.Italic()
+		}
+	}
+	if r, ok := rules[CrossedOut]; ok {
+		if r == "true" {
+			out = out.CrossedOut()
+		}
+	}
+	if r, ok := rules[Overlined]; ok {
+		if r == "true" {
+			out = out.Overlined()
+		}
+	}
+	if r, ok := rules[Inverse]; ok {
+		if r == "true" {
+			out = out.Reverse()
+		}
+	}
+	if r, ok := rules[Blink]; ok {
+		if r == "true" {
+			out = out.Blink()
+		}
+	}
+	w.Write([]byte(aurora.Sprintf("%s", out)))
+	return bf.GoToNext
+}
+
+func (tr *TermRenderer) RenderHeader(w io.Writer, ast *bf.Node) {
+}
+
+func (tr *TermRenderer) RenderFooter(w io.Writer, ast *bf.Node) {
+}