From 1ccd4c87136091e7a71f05c8660849552e0dba36 Mon Sep 17 00:00:00 2001
From: Alejandro Sior <aho@sior.be>
Date: Wed, 31 Aug 2022 20:28:57 +0200
Subject: site: add the basis

---
 site.go | 149 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 site.go

(limited to 'site.go')

diff --git a/site.go b/site.go
new file mode 100644
index 0000000..46e6cee
--- /dev/null
+++ b/site.go
@@ -0,0 +1,149 @@
+package main
+
+import (
+	"os"
+	"io/ioutil"
+	"net/http"
+	"path"
+	"path/filepath"
+	"strings"
+)
+
+const staticPrefix = "/static/"
+
+type NavTree struct {
+	name string
+	path string
+	children []NavTree
+	hasIndex bool
+	selected bool
+}
+
+func stripPath(caminho string) string {
+	caminho = path.Clean(caminho)
+	return "/" + path.Join(strings.Split(caminho, "/")[1:]...)
+}
+
+func rootTree(root string, goal string) (NavTree, string) {
+	nav := NavTree{}
+	nav.name = path.Base(root)
+	nav.path = root
+	nav.selected = false
+	
+	index := ""
+
+	if !strings.HasPrefix(goal, root) {
+		return nav, index
+	}
+	
+	nav.selected = true
+
+	filepath.Walk(root, func(current string, info os.FileInfo, err error) error {
+		if info.Name() == ".index" {
+			index = current
+		}
+		
+		if current == root || info.Name()[0] == '.'  {
+			return nil
+		}
+		
+		rec, idx := rootTree(current, goal)
+		if idx != "" {
+			index = idx
+		}
+		
+		nav.children = append(nav.children, rec)
+
+		if info.IsDir() {
+			return filepath.SkipDir
+		} else {
+			return nil
+		}
+	})
+
+	return nav, index
+}
+
+func RenderList(children []NavTree) string {
+	deleg := ""
+	ul := "<ul>"
+	for _, s := range children {
+		u, d := s.Render()
+		ul += u
+		deleg += d
+	}
+	ul += "</ul>"
+	ul += deleg
+	return ul
+}
+
+func (v *NavTree) Render() (string, string) {
+	li := "<li><a href=\"" + stripPath(v.path) + "\">"
+	if v.selected {
+		li += "<span class=\"nav-intended\">"
+	} else {
+		li += "<span class=\"nav-not-intended\">"
+	}
+	li += v.name
+	li += "</span></a></li>"
+	
+	deleg := ""
+
+	if len(v.children) > 0 {
+		deleg += RenderList(v.children)
+	}
+	
+	return li, deleg
+}
+
+func build(request *http.Request) (string, int) {
+	code := 200
+	root := request.Host
+	postLoc := path.Join(root, request.URL.Path)
+	
+	if strings.HasPrefix(request.URL.Path, staticPrefix) {
+		staticLoc := path.Join(root, request.URL.Path[len(staticPrefix):])
+		static, err0 := ioutil.ReadFile(staticLoc)
+		if err0 != nil {
+			return "Path not  found", 404
+		}
+		
+		return string(static), 200
+	}
+	
+	tr, idx := rootTree(root, postLoc)
+	template, err0 := ioutil.ReadFile(idx)
+	if err0 != nil {
+		return "No template in tree", 500
+	}
+
+	final := string(template)
+	
+	post, err1 := ioutil.ReadFile(postLoc)
+	if err1 != nil {
+		viewLoc := path.Join(root, request.URL.Path, ".view")
+		
+		view, err1_0 := ioutil.ReadFile(viewLoc)
+		if err1_0 != nil {
+			return "Path not found", 404
+		}
+		post = view
+	}
+
+	final = strings.Replace(string(template), "{{ post }}", string(post), -1)
+	final = strings.Replace(string(final), "{{ nav }}", RenderList(tr.children), -1)
+	
+	return final, code
+}
+
+func handler(w http.ResponseWriter, r *http.Request) {
+	content, code := build(r)
+
+	w.WriteHeader(code)
+	w.Write([]byte(content))
+}
+
+func main() {
+	http.HandleFunc("/", handler)
+	http.ListenAndServe(":8080", nil)
+}
\ No newline at end of file
-- 
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