Basic version that works

main.go

@@ -18,11 +18,28 @@ const (
 // TemplateData is the data that is filled and passed to the HTML template
 type TemplateData struct {
 	Title    string
-	CSSFile string
 	Credits  string
+	Sections []*TemplateSection
+}
+
+// TemplateSection is a section of the rules
+type TemplateSection struct {
+	ID    string
+	Title string
+	Extra bool
+	Rules []TemplateRule
+	Text  string
+}
+
+// TemplateRule is a single rule
+type TemplateRule struct {
+	ID    string
+	Text  string
+	Depth int
 }
 
 var funmap = template.FuncMap{
+	"toCredits": tplToCredits,
 	"htmlify":   tplHtmlify,
 }
 
@@ -33,15 +50,12 @@ func main() {
 	txtfile := flag.String("in", "rules.txt", "Path to rules.txt file")
 	tplfile := flag.String("template", "template.html", "Path to template file")
 	outname := flag.String("out", "out.html", "Output file")
-	style := flag.String("css", "style.css", "Name of the CSS stylesheet")
 
 	// Read template file
 	tpl, err := template.New(*tplfile).Funcs(funmap).ParseFiles(*tplfile)
 	checkErr(err, "Could not load template file \"%s\"", *tplfile)
 
-	tpldata := TemplateData{
-		CSSFile: *style,
-	}
+	tpldata := TemplateData{}
 
 	// Read rules file
 	filebytes, err := ioutil.ReadFile(*txtfile)
@@ -74,12 +88,73 @@ func main() {
 
 	// Every rule is a line (pretty handy!)
 	lines := strings.Split(filestr, "\n")
+	var currentSection *TemplateSection
 	for _, line := range lines {
+		// Trim line (used for several purposes)
+		trimmed := strings.TrimSpace(line)
+
 		// Skip empty lines
-		line = strings.TrimSpace(line)
-		if len(line) < 1 {
+		if len(trimmed) < 1 {
 			continue
 		}
+
+		// All rules begin with "(ID)"
+		isRule := trimmed[0] == '('
+
+		// All sections begin with "N. "
+		// for sake of not making this check extra complicated we're going to
+		// assume it has to be within the first 5 characters
+		isSection := strings.Index(trimmed[:5], ". ") > 0
+
+		// Calculate depth based on number of whitespace (/2)
+		depth := len(line) - len(trimmed)
+
+		switch {
+		// It's a section
+		case isSection:
+			parts := strings.SplitN(trimmed, ". ", 2)
+			if len(parts) < 2 {
+				// ???
+				fmt.Fprintf(os.Stderr, "Found unexpected line: \"%s\"\n", trimmed)
+				continue
+			}
+			// Create new section
+			currentSection = &TemplateSection{
+				ID:    parts[0],
+				Title: parts[1],
+				Rules: []TemplateRule{},
+				Extra: false,
+			}
+			tpldata.Sections = append(tpldata.Sections, currentSection)
+
+		// It's a new rule
+		case isRule:
+
+			// ID is between ()s
+			endID := strings.IndexRune(trimmed, ')')
+			if endID < 0 {
+				// ???
+				fmt.Fprintf(os.Stderr, "Found unexpected or malformed line: \"%s\"\n", trimmed)
+				continue
+			}
+
+			currentSection.Rules = append(currentSection.Rules, TemplateRule{
+				ID:    trimmed[1:endID],
+				Text:  strings.TrimSpace(trimmed[endID+1:]),
+				Depth: depth,
+			})
+
+		// It's something else
+		default:
+			// If there is at least a rule, assume it's a continuation of the last rule
+			if len(currentSection.Rules) > 0 {
+				currentSection.Rules[len(currentSection.Rules)-1].Text += "\n" + line
+			} else {
+				// No rules? Might be an extra
+				currentSection.Extra = true
+				currentSection.Text += line + "\n"
+			}
+		}
 	}
 
 	// Create output file
@@ -99,13 +174,19 @@ func checkErr(err error, fmtstr string, args ...interface{}) {
 	}
 }
 
-func tplHtmlify(str string) template.HTML {
+func tplToCredits(str string) template.HTML {
 	// Make first line an heading
 	idx := strings.IndexRune(str, '\n')
 	if idx > 0 {
-		str = "<h1>" + str[:idx] + "</h1>" + str[idx:]
+		str = "<h1>" + str[:idx] + "</h1><p>" + str[idx+1:]
 	}
-	// Replace newlines with HTML line-break tag
+	// Wrap other lines in <p> tags
+	str = strings.ReplaceAll(str, "\n", "</p><p>") + "</p>"
+	return template.HTML(str)
+}
+
+func tplHtmlify(str string) template.HTML {
+	// Replace newlines with <br />
 	str = strings.ReplaceAll(str, "\n", "<br />")
 	return template.HTML(str)
 }

parser.go

@@ -1 +0,0 @@
-package main

style.css

@@ -0,0 +1,46 @@
+@import url('https://fonts.googleapis.com/css?family=Roboto:300,400&display=swap');
+
+body {
+    font-family: 'Roboto', sans-serif;
+    font-weight: 300;
+    display: flex;
+    justify-content: center;
+    font-size: 11pt;
+}
+
+main {
+    flex: 1;
+    max-width: 60em;
+}
+
+h1,
+h2 {
+    color: #4b5b69;
+    font-weight: 400;
+}
+
+p {
+    margin: 0;
+    padding: 2pt 0;
+}
+
+ul {
+    padding-left: 10pt;
+}
+
+li {
+    margin: 10pt 0;
+    list-style-type: none;
+}
+
+.depth-2 {
+    padding-left: 20pt;
+}
+
+.depth-4 {
+    padding-left: 40pt;
+}
+
+.depth-6 {
+    padding-left: 60pt;
+}

template.html

@@ -3,15 +3,29 @@
 
 <head>
     <title>{{ .Title }}</title>
-    {{ if .CSSFile }}
-    <link href="{{ .CSSFile }}" rel="stylesheet" />
-    {{ end }}
+    <link rel="stylesheet" href="style.css">
 </head>
 
 <body>
+    <main>
         <header class="credits">
-        {{ .Credits | htmlify }}
+            {{ .Credits | toCredits }}
         </header>
+        <section class="rules">
+            {{ range .Sections }}
+            <h2 id="{{ .ID }}">{{ .ID }}. {{ .Title }}</h2>
+            {{ if .Extra }}
+            {{ .Text | htmlify }}
+            {{ else }}
+            <ul>
+                {{ range .Rules }}
+                <li id="{{ .ID }}" class="depth-{{ .Depth }}">({{ .ID }}) {{ .Text | htmlify }}</li>
+                {{ end }}
+            </ul>
+            {{ end }}
+            {{ end }}
+        </section>
+    </main>
 </body>
 
 </html>