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html.go
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html.go
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// Package html outputs to HTML.
package html // import "github.com/airtame/kommentaar/html"
import (
"fmt"
"html/template"
"io"
"net/http"
"os"
"github.com/airtame/kommentaar/docparse"
yaml "gopkg.in/yaml.v3"
)
var funcMap = template.FuncMap{
"add": func(a, b int) int { return a + b },
"status": func(c int) string { return http.StatusText(c) },
"schema": func(in interface{}) string {
// TODO: link ref?
d, err := yaml.Marshal(in)
if err != nil {
return fmt.Sprintf("yaml.Marshal error: %v", err)
}
return string(d)
},
}
var mainTpl = template.Must(template.New("mainTpl").Funcs(funcMap).Parse(`
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>{{.Config.Title}} API documentation {{.Config.Version}}</title>
<style>
body {
font: 16px/1.9em sans-serif;
background-color: #eee;
}
a {
text-decoration: none;
}
p, ul {
margin: 0;
padding: 0;
}
ul {
margin-left: 2em;
}
h3 {
font-size: 1.5em;
position: relative;
margin-top: 1rem;
margin-bottom: 0;
padding: .2rem;
padding-left: .5rem;
margin-bottom: -1px;
}
h3.js-expand {
cursor: pointer;
}
h4 {
margin: 0;
font-size: 16px;
}
sup {
color: #aaa;
}
.permalink {
font-weight: normal;
color: rgb(0, 0, 238);
/* Make it a bit easier to click. */
width: 1.5em;
display: inline-block;
text-align: center;
}
.permalink:visited {
color: rgb(0, 0, 238);
}
.permalink:hover {
color: #66f;
}
h3 .permalink {
font-size: 16px;
}
.endpoint {
position: relative;
background-color: #fff;
border: 1px solid #b7b7b7;
margin-bottom: -1px;
padding: .2em .5em;
border-radius: 2px;
}
.endpoint-top {
cursor: pointer;
}
.endpoint-info {
margin-left: 4.5rem;
display: none;
}
.endpoint-info p {
max-width: 55em;
}
.resource {
display: inline-block;
min-width: 38rem;
}
.resource .method {
display: inline-block;
min-width: 4rem;
}
.param-name {
display: inline-block;
min-width: 11rem;
}
</style>
</head>
<body>
<h1>{{.Config.Title}} API documentation {{.Config.Version}}</h1>
{{if .Config.Description}}<p>{{.Config.Description}}</p>{{end}}
{{if .Config.ContactEmail}}
<p>
Contact <a href="mailto:{{.Config.ContactEmail}}">
{{if .Config.ContactName}}
{{.Config.ContactName}}
{{else}}
{{.Config.ContactEmail}}
{{end}}
</a> for questions.
</p>
{{end}}
{{define "paramsTpl"}}
<ul>
{{range $p := .Params}}
<li><code class="param-name">{{$p.Name}}</code> {{$p.Info}}</li>
{{end}}
</ul>
{{end}}
<h2>Endpoints</h2>
{{range $i, $e := .Endpoints}}
{{if eq $i 0}}
</div><div>
<h3 id="{{index $e.Tags 0}}" class="js-expand">
{{index $e.Tags 0}}
<a class="permalink" href="#{{index $e.Tags 0}}">§</a>
</h3>
{{else if ne (index (index $.Endpoints (add $i -1)).Tags 0) (index $e.Tags 0)}}
</div><div>
<h3 id="{{index $e.Tags 0}}" class="js-expand">
{{index $e.Tags 0}}
<a class="permalink" href="#{{index $e.Tags 0}}">§</a>
</h3>
{{end}}
<div class="endpoint" id="{{$e.Method}}-{{$e.Path}}">
<div class="endpoint-top">
<code class="resource"><span class="method">{{$e.Method}}</span> {{$e.Path}}</code>
{{$e.Tagline}}
<a class="permalink" href="#{{$e.Method}}-{{$e.Path}}">§</a>
</div>
<div class="endpoint-info">
<p>{{$e.Info}}</p>
{{if $e.Request.Path}}
<h4>Path parameters</h4>
{{/* {{template "paramsTpl" $e.Request.Path}} */}}
{{end}}
{{if $e.Request.Query}}
<h4>Query parameters</h4>
{{/* {{template "paramsTpl" $e.Request.Query}} */}}
{{end}}
{{if $e.Request.Form}}
<h4>Form parameters</h4>
{{/* {{template "paramsTpl" $e.Request.Form}} */}}
{{end}}
{{if $e.Request.Body}}
<h4>Request body</h4>
<ul>
<li><a href="#{{$e.Request.Body.Reference}}">{{$e.Request.Body.Reference}}</a>
<sup>({{$e.Request.ContentType}})</sup></li>
</ul>
{{end}}
<h4>Responses</h4>
<ul>
{{range $code, $r := $e.Responses}}
<li><code class="param-name">{{$code}} {{status $code}}</code>
{{if $r.Body}}
{{if $r.Body.Reference}}
<a href="#{{$r.Body.Reference}}">{{$r.Body.Reference}}</a>
{{else}}
{{$r.Body.Description}}
{{end}}
<sup>({{$r.ContentType}})</sup>
{{end}}
</li>
{{end}}
</ul>
</div>
</div>
{{end}}
<h2>Models</h2>
{{range $k, $v := .References}}
<h3 id="{{$k}}">
{{$k}}
<a class="permalink" href="#{{$k}}">§</a>
</h3>
<div class="endpoint">
<p>{{$v.Info}}</p>
<pre>{{$v.Schema|schema}}</pre>
</div>
{{end}}
<script>
var add = function(endpoint) {
// Expand row on click.
var topLine = endpoint.getElementsByClassName('endpoint-top')[0]
var info = endpoint.getElementsByClassName('endpoint-info')[0]
topLine.addEventListener('click', function(e) {
if (e.target.className === 'permalink')
return
e.preventDefault()
//for (var i = 0; i < topLine.length; i++)
info.style.display = info.style.display === 'block' ? '' : 'block'
})
// Prevent text selection on double click.
//endpoint.addEventListener('mousedown', function(e) {
// if (e.detail > 1)
// e.preventDefault()
//})
}
var ep = document.getElementsByClassName('endpoint')
for (var i = 0; i < ep.length; i++)
add(ep[i])
// Expand all rows in the section.
document.addEventListener('click', function(e) {
if (e.target.className !== 'js-expand')
return
e.preventDefault()
var parent = e.target.parentNode
if (parent.tagName.toLowerCase() === 'h3')
parent = parent.parentNode
var info = parent.getElementsByClassName('info')
for (var i = 0; i < info.length; i++)
info[i].style.display = info[i].style.display === 'block' ? '' : 'block'
})
</script>
</body>
</html>
`))
// WriteHTML writes w as HTML.
func WriteHTML(w io.Writer, prog *docparse.Program) error {
// Too hard to write template otherwise.
for i := range prog.Endpoints {
prog.Endpoints[i].Path = prog.Config.Basepath + prog.Config.Prefix + prog.Endpoints[i].Path
if len(prog.Endpoints[i].Tags) == 0 {
prog.Endpoints[i].Tags = []string{"default"}
}
}
return mainTpl.Execute(w, prog)
}
// ServeHTML serves HTML documentation at addr.
func ServeHTML(addr string) func(io.Writer, *docparse.Program) error {
return func(_ io.Writer, prog *docparse.Program) error {
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
// Rescan, but first clear some fields so we don't end up with
// duplicate data.
prog.Config.Output = func(io.Writer, *docparse.Program) error {
return nil
}
prog.Endpoints = nil
prog.References = make(map[string]docparse.Reference)
err := docparse.FindComments(os.Stdout, prog)
if err != nil {
w.WriteHeader(500)
_, wErr := fmt.Fprintf(w, "could not parse comments: %v", err)
if wErr != nil {
_, _ = fmt.Fprintf(os.Stderr, "could not write response: %v", wErr)
}
return
}
for _, e := range prog.Endpoints {
if len(e.Tags) == 0 {
e.Tags = []string{"untagged"}
}
}
err = mainTpl.Execute(w, prog)
if err != nil {
_, wErr := fmt.Fprintf(w, "could not execute template: %v", err)
if wErr != nil {
_, _ = fmt.Fprintf(os.Stderr, "could not write response: %v", wErr)
}
}
})
fmt.Printf("serving on %v\n", addr)
return http.ListenAndServe(addr, nil)
}
}