From d6935f78f3b56795fdb8f5f7c636eaf47f08e2af Mon Sep 17 00:00:00 2001
From: oabrivard <olivier@abrivard.fr>
Date: Sun, 20 Aug 2023 00:13:52 +0200
Subject: [PATCH] Initial commit

---
 .gitignore |  3 ++
 edit.html  |  5 +++
 go.mod     |  3 ++
 gowiki.go  | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 view.html  |  3 ++
 5 files changed, 109 insertions(+)
 create mode 100644 edit.html
 create mode 100644 go.mod
 create mode 100644 gowiki.go
 create mode 100644 view.html

diff --git a/.gitignore b/.gitignore
index adf8f72..3207fee 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
+.DS_Store
+*.txt
+
 # ---> Go
 # If you prefer the allow list template instead of the deny list, see community template:
 # https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
diff --git a/edit.html b/edit.html
new file mode 100644
index 0000000..c30e8a9
--- /dev/null
+++ b/edit.html
@@ -0,0 +1,5 @@
+<h1>Editing {{.Title}}</h1>
+<form action="/save/{{.Title}}" method="POST">
+  <div><textarea name="body" rows="20" cols="80">{{printf "%s" .Body}}</textarea></div>
+  <div><input type="submit" value="Save"></div>
+</form>
\ No newline at end of file
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..56ffbaf
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module gitea.paas.celticinfo.fr/oabrivard/gowiki
+
+go 1.20
diff --git a/gowiki.go b/gowiki.go
new file mode 100644
index 0000000..a172b5e
--- /dev/null
+++ b/gowiki.go
@@ -0,0 +1,95 @@
+package main
+
+import (
+	"html/template"
+	"log"
+	"net/http"
+	"os"
+	"regexp"
+)
+
+var templates = template.Must(template.ParseFiles("edit.html", "view.html"))
+var validPath = regexp.MustCompile("^/(edit|save|view)/([a-zA-Z0-9]+)$")
+
+type Page struct {
+	Title string
+	Body  []byte
+}
+
+func (p *Page) Save() error {
+	filename := p.Title + ".txt"
+	return os.WriteFile(filename, p.Body, 0600)
+}
+
+func loadPage(title string) (*Page, error) {
+	filename := title + ".txt"
+	body, err := os.ReadFile(filename)
+	if err != nil {
+		return nil, err
+	}
+	return &Page{Title: title, Body: body}, nil
+}
+
+func renderTemplate(w http.ResponseWriter, tmpl string, p *Page) {
+	err := templates.ExecuteTemplate(w, tmpl+".html", p)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
+}
+
+func viewHandler(w http.ResponseWriter, r *http.Request, title string) {
+	p, err := loadPage(title)
+	if err != nil {
+		http.Redirect(w, r, "/edit/"+title, http.StatusFound)
+		return
+	}
+	renderTemplate(w, "view", p)
+}
+
+func editHandler(w http.ResponseWriter, r *http.Request, title string) {
+	p, err := loadPage(title)
+	if err != nil {
+		p = &Page{Title: title}
+	}
+	renderTemplate(w, "edit", p)
+}
+
+func saveHandler(w http.ResponseWriter, r *http.Request, title string) {
+	body := r.FormValue("body")
+	p := &Page{Title: title, Body: []byte(body)}
+	if err := p.Save(); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	http.Redirect(w, r, "/view/"+title, http.StatusFound)
+}
+
+func makeHandler(fn func(http.ResponseWriter, *http.Request, string)) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		m := validPath.FindStringSubmatch(r.URL.Path)
+		if m == nil {
+			http.NotFound(w, r)
+			return
+		}
+		fn(w, r, m[2])
+	}
+}
+
+func main() {
+	http.HandleFunc("/view/", makeHandler(viewHandler))
+	http.HandleFunc("/edit/", makeHandler(editHandler))
+	http.HandleFunc("/save/", makeHandler(saveHandler))
+
+	log.Fatal((http.ListenAndServe(":8080", nil)))
+	// p1 := &Page{"oli", []byte("Abreuvoir")}
+	// if err := p1.Save(); err != nil {
+	// 	log.Fatal(err)
+	// }
+
+	// p2, err := loadPage("oli")
+	// if err != nil {
+	// 	log.Fatal(err)
+	// }
+
+	// fmt.Println(string(p2.Body))
+}
diff --git a/view.html b/view.html
new file mode 100644
index 0000000..98a63e8
--- /dev/null
+++ b/view.html
@@ -0,0 +1,3 @@
+<h1>{{.Title}}</h1>
+<p>[<a href="/edit/{{.Title}}">edit</a>]</p>
+<div>{{printf "%s" .Body}}</div>