Base project

controllers/routes.go

@@ -0,0 +1,90 @@
+package controllers
+
+import (
+	"html/template"
+	"log"
+	"net/http"
+	"regexp"
+
+	"github.com/rjNemo/go-wiki/models"
+)
+
+// func ParseTemplates() *template.Template {
+// 	return template.Must(template.ParseFiles("templates/edit.html", "templates/view.html")) // add slice of fileNAmes
+// }
+
+func RegisteredRoutes() {
+	// http.HandleFunc("/", loveHandler)
+	http.HandleFunc("/view/", makeHandler(viewHandler))
+	http.HandleFunc("/edit/", makeHandler(editHandler))
+	http.HandleFunc("/save/", makeHandler(saveHandler))
+	http.HandleFunc("/", homeHandler)
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}
+
+// func loveHandler(w http.ResponseWriter, r *http.Request) {
+// 	title := r.URL.Path[1:]
+// 	p := models.NewPage(title, nil) // already a pointer
+// 	renderTemplate(w, "love", p)
+// }
+
+func homeHandler(w http.ResponseWriter, r *http.Request) {
+	// viewHandler(w, r, "FrontPage")
+	p := models.BlankPage()
+	renderTemplate(w, "home", p)
+}
+
+func viewHandler(w http.ResponseWriter, r *http.Request, title string) {
+	p, err := models.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 := models.LoadPage(title)
+	if err != nil {
+		p = models.NewPage(title, nil)
+	}
+	renderTemplate(w, "edit", p)
+}
+
+func saveHandler(w http.ResponseWriter, r *http.Request, title string) {
+	body := r.FormValue("body")
+	p := models.NewPage(title, []byte(body))
+	err := p.Save()
+	checkError(err, w)
+	http.Redirect(w, r, "/view/"+title, http.StatusFound)
+}
+
+// var templates = template.Must(template.ParseFiles("templates/edit.html", "templates/view.html")) // add slice of fileNAmes
+
+func renderTemplate(w http.ResponseWriter, tmpl string, p *models.Page) {
+	// err := templates.ExecuteTemplate(w, "templates/"+tmpl+".html", p)
+	t, err := template.ParseFiles("templates/" + tmpl + ".html")
+	checkError(err, w)
+	err = t.Execute(w, p)
+	checkError(err, w)
+}
+
+func checkError(err error, w http.ResponseWriter) {
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+}
+
+var validPath = regexp.MustCompile("^/(edit|save|view)/([a-zA-Z0-9]+)$")
+
+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])
+	}
+}

data/TestPage.txt

@@ -0,0 +1 @@
+This is a sample page

data/chocolate.txt

@@ -0,0 +1 @@
+I like it very much

data/test.txt

@@ -0,0 +1 @@
+Hello

go.mod

@@ -0,0 +1,3 @@
+module github.com/rjNemo/go-wiki
+
+go 1.14

main.go

@@ -0,0 +1,13 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/rjNemo/go-wiki/controllers"
+)
+
+func main() {
+	fmt.Printf("Start Go-wiki server at %s\n", time.Now())
+	controllers.RegisteredRoutes()
+}

models/page.go

@@ -0,0 +1,32 @@
+package models
+
+import "io/ioutil"
+
+type Page struct {
+	Title string
+	Body  []byte
+}
+
+// write constructor blank page
+
+func BlankPage() *Page {
+	return &Page{Title: "Empty page", Body: []byte("Write some content")}
+}
+
+func NewPage(title string, body []byte) *Page {
+	return &Page{Title: title, Body: body}
+}
+
+func (p *Page) Save() error {
+	fileName := "data/" + p.Title + ".txt"
+	return ioutil.WriteFile(fileName, p.Body, 0600)
+}
+
+func LoadPage(title string) (*Page, error) {
+	fileName := "data/" + title + ".txt"
+	body, err := ioutil.ReadFile(fileName)
+	if err != nil {
+		return nil, err
+	}
+	return &Page{Title: title, Body: body}, nil
+}

templates/edit.html

@@ -0,0 +1,8 @@
+<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>

templates/home.html

@@ -0,0 +1,5 @@
+<h1>Hi there, Welcome to Go-Wiki</h1>
+
+<div>
+  <h2>Useful links</h2>
+</div>

templates/love.html

@@ -0,0 +1 @@
+<h1>Hi there, I love {{.Title}}</h1>

templates/view.html

@@ -0,0 +1,5 @@
+<h1>{{.Title}}</h1>
+
+<p>[<a href="/edit/{{.Title}}">edit</a>]</p>
+
+<div>{{printf "%s" .Body}}</div>