mostly finished db pages

pkg/render/render.go

@@ -0,0 +1,127 @@
+// Copyright (C) 2017 Marius Schellenberger
+
+package render
+
+import (
+	"html/template"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"github.com/blevesearch/bleve/analysis"
+	htmlFilter "github.com/blevesearch/bleve/analysis/char_filters/html_char_filter"
+	"github.com/russross/blackfriday"
+)
+
+var filter = makeFilter()
+
+func makeFilter() analysis.CharFilter {
+	f, _ := htmlFilter.CharFilterConstructor(nil, nil)
+	return f
+}
+
+var (
+	reHeader   = regexp.MustCompile("(<h[1-6])>(.+)(</h[1-6]>)")
+	reLink     = regexp.MustCompile(`id="(.+)">`)
+	whiteSpace = regexp.MustCompile(`\s+`)
+	reIndex    = regexp.MustCompile("<h([1-6])>(.+)</h[1-6]>")
+	titleRe    = regexp.MustCompile("[^a-zA-Z0-9 -]+")
+)
+
+func Render(p *Page) string {
+	rend := blackfriday.MarkdownCommon([]byte(p.Markdown))
+	index, html := buildIndex(string(rend))
+	html = strings.Replace(html, "<table>", `<table class="table">`, -1)
+	html = strings.Replace(html, "</h1>", `</h1><hr>`, -1)
+	html = strings.Replace(html, "<a", `<a target="_blank"`, -1)
+	p.Index = template.HTML(index)
+	p.Text = template.HTML(html)
+	return whiteSpace.ReplaceAllString(string(filter.Filter(rend)), " ")
+}
+
+func spaceReplace(s string) string {
+	return whiteSpace.ReplaceAllString(s, "+")
+	//TODO remove
+	//return strings.Replace(s, " ", "+", -1)
+}
+
+func makeLinkTitle(t string) (newTitle string, title string) {
+	title = titleRe.ReplaceAllString(t, "")
+	newTitle = spaceReplace(title)
+	return
+}
+
+func buildIndex(html string) (string, string) {
+	var ret string
+	m := make(map[string]int)
+	hn := reIndex.FindAllStringSubmatch(html, -1)
+	html = reHeader.ReplaceAllString(html, `${1} id="${2}">${2}${3}`)
+	html = reLink.ReplaceAllStringFunc(html, spaceReplace)
+	for k, v := range hn {
+		link, _ := makeLinkTitle(v[2])
+		i := m[link]
+		m[link] = i + 1
+		newLink := link + strconv.Itoa(i)
+		html = strings.Replace(html, link+`"`, newLink+`"`, 1)
+		ret += before(hn, k)
+		ret += `<li><a href="#` + newLink + `">` + v[2] + "</a>"
+		ret += after(hn, k)
+	}
+	return ret, html
+}
+
+func before(arr [][]string, i int) string {
+	c, _ := strconv.Atoi(arr[i][1])
+	if c == 1 {
+		return `<ul type="circle">`
+	}
+	return ""
+}
+
+func after(arr [][]string, i int) string {
+	c, _ := strconv.Atoi(arr[i][1])
+	if len(arr) <= i+1 {
+		return closeTag(c-1) + "</ul>"
+	}
+	n, _ := strconv.Atoi(arr[i+1][1])
+	if n == 1 {
+		return closeTag(c-n) + "</ul>"
+	} else if n < c {
+		return closeTag(c - n)
+	} else if n > c {
+		return openTag(n - c)
+	} else if n == c {
+		return "</li>"
+	}
+	return ""
+}
+
+func openTag(j int) (ret string) {
+	for i := 0; i < j; i++ {
+		ret += `<ul type="circle"><li>`
+	}
+	if j > 1 {
+		ret = strings.Replace(ret, "circle", "none", j-1)
+	}
+	ret = ret[0 : len(ret)-4]
+	return
+}
+
+func closeTag(j int) (ret string) {
+	for i := 0; i < j; i++ {
+		ret += "</li></ul></li>"
+	}
+	if j > 1 {
+		ret = strings.Replace(ret, "</li></li>", "</li>", -1)
+	}
+	return
+}
+
+func renderResult(res []Result) (html string) {
+	//TODO fmt.Sprintf ?
+	for r := range res {
+		html += `<a href="/` + r.LinkTitle + `"><b>` + r.Title + "</b></a>" +
+			`<pre style="white-space: pre-wrap">` + r.Text + "</pre><br>"
+
+	}
+}