forked from wendal/gor
/
widgets.go
242 lines (216 loc) · 6.99 KB
/
widgets.go
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package gor
import (
"fmt"
"github.com/wendal/errors"
"github.com/wendal/mustache"
"io/ioutil"
"log"
"os"
"path/filepath"
)
var (
WidgetBuilders = make(map[string]WidgetBuilder)
)
const (
Analytics_google = `
<script>
var _gaq=[['_setAccount','%s'],['_trackPageview']];
(function(d,t){var g=d.createElement(t),s=d.getElementsByTagName(t)[0];
g.src=('https:'==location.protocol?'//ssl':'//www')+'.google-analytics.com/ga.js';
s.parentNode.insertBefore(g,s)}(document,'script'));
</script>`
Comments_disqus = `
<div id="disqus_thread"></div>
<script>
var disqus_developer = 1;
var disqus_shortname = '%s'; // required: replace example with your forum shortname
/* * * DON'T EDIT BELOW THIS LINE * * */
(function() {
var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
dsq.src = 'http://' + disqus_shortname + '.disqus.com/embed.js';
(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
})();
</script>
<noscript>Please enable JavaScript to view the <a href="http://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript>
<a href="http://disqus.com" class="dsq-brlink">blog comments powered by <span class="logo-disqus">Disqus</span></a>
`
tpl_google_prettify = `
<script src="http://cdnjs.cloudflare.com/ajax/libs/prettify/188.0.0/prettify.js"></script>
<script>
var pres = document.getElementsByTagName("pre");
for (var i=0; i < pres.length; ++i) {
pres[i].className = "prettyprint %s";
}
prettyPrint();
</script>
`
)
type WidgetBuilder func(Mapper, mustache.Context) (Widget, error)
type Widget interface {
Prepare(mapper Mapper, ctx mustache.Context) Mapper
}
func init() {
WidgetBuilders["analytics"] = BuildAnalyticsWidget
WidgetBuilders["comments"] = BuildCommentsWidget
WidgetBuilders["google_prettify"] = BuildGoogle_prettify
}
func LoadWidgets(topCtx mustache.Context) ([]Widget, string, error) {
widgets := make([]Widget, 0)
assets := ""
err := filepath.Walk("widgets", func(path string, info os.FileInfo, err error) error {
if err != nil {
return nil
}
if !info.IsDir() {
return nil
}
cnf_path := path + "/config.yml"
fst, err := os.Stat(cnf_path)
if err != nil || fst.IsDir() {
return nil //ignore
}
cnf, err := ReadYml(cnf_path)
if err != nil {
return errors.New(cnf_path + ":" + err.Error())
}
if cnf["layout"] != nil {
widget_enable, ok := cnf["layout"].(bool)
if ok && !widget_enable {
log.Println("Disable >", cnf_path)
}
}
builderFunc := WidgetBuilders[info.Name()]
if builderFunc == nil {
_widget, _assets, _err := BuildCustomWidget(info.Name(), path, cnf)
if _err != nil {
log.Println("NO WidgetBuilder >>", cnf_path, _err)
}
if _widget != nil {
widgets = append(widgets, _widget)
if _assets != nil {
for _, asset := range _assets {
assets += asset + "\n"
}
}
}
return nil
}
widget, err := builderFunc(cnf, topCtx)
if err != nil {
return err
}
widgets = append(widgets, widget)
log.Println("Load widget from ", cnf_path)
return nil
})
return widgets, assets, err
}
//-------------------------------------------------------------------------------------
type AnalyticsWidget Mapper
func (self AnalyticsWidget) Prepare(mapper Mapper, topCtx mustache.Context) Mapper {
if mapper["analytics"] != nil && !mapper["analytics"].(bool) {
return nil
}
return Mapper(self)
}
func BuildAnalyticsWidget(cnf Mapper, topCtx mustache.Context) (Widget, error) {
if cnf.Layout() != "google" {
return nil, errors.New("AnalyticsWidget Only for Goolge yet")
}
google := cnf[cnf.Layout()].(map[string]interface{})
tracking_id := google["tracking_id"]
if tracking_id == nil {
return nil, errors.New("AnalyticsWidget Of Google need tracking_id")
}
self := make(AnalyticsWidget)
self["analytics"] = fmt.Sprintf(Analytics_google, tracking_id)
return self, nil
}
//--------------------------------------------------------------------------------
type CommentsWidget Mapper
func (self CommentsWidget) Prepare(mapper Mapper, topCtx mustache.Context) Mapper {
if mapper["comments"] != nil && !mapper["comments"].(bool) {
log.Println("Disable comments")
return nil
}
return Mapper(self)
}
func BuildCommentsWidget(cnf Mapper, topCtx mustache.Context) (Widget, error) {
if cnf.Layout() != "disqus" {
return nil, errors.New("CommentsWidget Only for disqus yet")
}
disqus := cnf[cnf.Layout()].(map[string]interface{})
short_name := disqus["short_name"]
if short_name == nil {
return nil, errors.New("CommentsWidget Of disqus need short_name")
}
self := make(CommentsWidget)
self["comments"] = fmt.Sprintf(Comments_disqus, short_name)
return self, nil
}
//-----------------------------------------------
type google_prettify Mapper
func (self google_prettify) Prepare(mapper Mapper, topCtx mustache.Context) Mapper {
if mapper["google_prettify"] != nil && !mapper["google_prettify"].(bool) {
return nil
}
return Mapper(self)
}
func BuildGoogle_prettify(cnf Mapper, topCtx mustache.Context) (Widget, error) {
if cnf["linenums"].(bool) {
self := make(google_prettify)
self["google_prettify"] = fmt.Sprintf(tpl_google_prettify, "linenums")
return self, nil
}
self := make(google_prettify)
self["google_prettify"] = fmt.Sprintf(tpl_google_prettify, "")
return self, nil
}
func PrapareWidgets(widgets []Widget, mapper Mapper, topCtx mustache.Context) mustache.Context {
mappers := make([]interface{}, 0)
for _, widget := range widgets {
mr := widget.Prepare(mapper, topCtx)
if mr != nil {
for k, v := range mr {
mapper[k] = v
}
mappers = append(mappers, mr)
}
}
return mustache.MakeContexts(mappers...)
}
type CustomWidget struct {
name string
layout *DocContent
mapper Mapper
}
func (c *CustomWidget) Prepare(mapper Mapper, ctx mustache.Context) Mapper {
return Mapper(map[string]interface{}{c.name: c.layout.Source})
}
func BuildCustomWidget(name string, dir string, cnf Mapper) (Widget, []string, error) {
layoutName, ok := cnf["layout"]
if !ok || layoutName == "" {
log.Println("Skip Widget : " + dir)
return nil, nil, nil
}
layoutFilePath := dir + "/layouts/" + layoutName.(string) + ".html"
f, err := os.Open(layoutFilePath)
if err != nil {
return nil, nil, errors.New("Fail to load Widget Layout" + dir + "\n" + err.Error())
}
defer f.Close()
cont, err := ioutil.ReadAll(f)
if err != nil {
return nil, nil, errors.New("Fail to load Widget Layout" + dir + "\n" + err.Error())
}
assets := []string{}
for _, js := range cnf.GetStrings("javascripts") {
path := "/assets/" + dir + "/javascripts/" + js
assets = append(assets, fmt.Sprintf("<script type=\"text/javascript\" src=\"%s\"></script>", path))
}
for _, css := range cnf.GetStrings("stylesheets") {
path2 := "/assets/" + dir + "/stylesheets/" + css
assets = append(assets, fmt.Sprintf("<link href=\"%s\" type=\"text/css\" rel=\"stylesheet\" media=\"all\">", path2))
}
return &CustomWidget{name, &DocContent{string(cont), string(cont), nil}, cnf}, assets, nil
}