From 2313f0f36c0af8187bd1bb91206eac898c632d9a Mon Sep 17 00:00:00 2001
From: Johannes Rothe <mail@johannes-rothe.de>
Date: Thu, 17 Feb 2022 22:09:03 +0100
Subject: [PATCH] Initial commit

---
 edit.html |  6 ++++++
 go.mod    |  3 +++
 main.go   | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 71 insertions(+)
 create mode 100644 edit.html
 create mode 100644 go.mod
 create mode 100644 main.go

diff --git a/edit.html b/edit.html
new file mode 100644
index 0000000..f168d43
--- /dev/null
+++ b/edit.html
@@ -0,0 +1,6 @@
+<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>
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..4682abd
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module wiki
+
+go 1.17
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..b47b37d
--- /dev/null
+++ b/main.go
@@ -0,0 +1,62 @@
+package main
+
+import (
+	"fmt"
+	"html/template"
+	"log"
+	"net/http"
+	"os"
+)
+
+type Page struct {
+	Title string
+	Body  []byte
+}
+
+func loadPage(title string) (*Page, error) {
+	body, err := os.ReadFile(title + ".txt")
+	if err != nil {
+		return nil, err
+	}
+	return &Page{Title: title, Body: body}, nil
+}
+
+func (p *Page) savePage() error {
+	filename := p.Title + ".txt"
+	return os.WriteFile(filename, p.Body, 0600)
+}
+
+func viewHandler(w http.ResponseWriter, r *http.Request) {
+	title := r.URL.Path[len("/view/"):]
+	page, err := loadPage(title)
+	if err != nil {
+		fmt.Fprintf(w, "<h1>ERROR</h1><p>%s not found!</p>", title)
+	} else {
+		fmt.Fprintf(w, "<h1>%s</h1><p>%s</p>", page.Title, string(page.Body))
+	}
+}
+
+func saveHandler(w http.ResponseWriter, r *http.Request) {
+	title := r.URL.Path[len("/save/"):]
+	p := &Page{Title: title, Body: []byte(r.FormValue("body"))}
+	p.savePage()
+	http.Redirect(w, r, "/view/"+title, http.StatusFound)
+
+}
+
+func editHandler(w http.ResponseWriter, r *http.Request) {
+	title := r.URL.Path[len("/edit/"):]
+	page, err := loadPage(title)
+	if err != nil {
+		page = &Page{Title: title}
+	}
+	t, _ := template.ParseFiles("edit.html")
+	t.Execute(w, page)
+}
+
+func main() {
+	http.HandleFunc("/view/", viewHandler)
+	http.HandleFunc("/save/", saveHandler)
+	http.HandleFunc("/edit/", editHandler)
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}