Added partial support for tags

cmd/data/articles.go

@@ -1,6 +1,9 @@
 package data
 
 import (
+	"encoding/gob"
+	"fmt"
+	"os"
 	"sync"
 	"time"
 
@@ -19,11 +22,18 @@ type Article struct {
 }
 
 type ArticleList struct {
-	addCh chan *Article
-	delCh chan uuid.UUID
-	retCh chan *Article
-	getCh chan []Article
-	list  []*Article
+	addCh    chan *Article
+	delCh    chan uuid.UUID
+	retCh    chan *Article
+	getCh    chan []Article
+	articles []*Article
+	wg       sync.WaitGroup
+}
+
+type TagList struct {
+	addCh chan string
+	getCh chan []string
+	tags  []string
 	wg    sync.WaitGroup
 }
 
@@ -36,22 +46,29 @@ func minArticleList() *ArticleList {
 	}
 }
 
-func (l *ArticleList) start() {
-	l.wg.Done()
+func minTagList() *TagList {
+	return &TagList{
+		addCh: make(chan string),
+		getCh: make(chan []string),
+	}
+}
+
+func (al *ArticleList) start() {
+	al.wg.Done()
 	for {
 		select {
-		case article := <-l.addCh:
-			l.list = append(l.list, article)
-		case uuid := <-l.delCh:
-			for i, article := range l.list {
+		case article := <-al.addCh:
+			al.articles = append(al.articles, article)
+		case uuid := <-al.delCh:
+			for i, article := range al.articles {
 				if article.UUID == uuid {
-					l.list = append(l.list[:i], l.list[i+1:]...)
-					l.retCh <- article
+					al.articles = append(al.articles[:i], al.articles[i+1:]...)
+					al.retCh <- article
 				}
 			}
-		case l.getCh <- func() []Article {
+		case al.getCh <- func() []Article {
 			var list []Article
-			for _, article := range l.list {
+			for _, article := range al.articles {
 				list = append(list, *article)
 			}
 			return list
@@ -60,9 +77,20 @@ func (l *ArticleList) start() {
 	}
 }
 
+func (tl *TagList) start() {
+	tl.wg.Done()
+	for {
+		select {
+		case tag := <-tl.addCh:
+			tl.tags = append(tl.tags, tag)
+		case tl.getCh <- tl.tags:
+		}
+	}
+}
+
 func NewArticleList() *ArticleList {
 	list := minArticleList()
-	list.list = []*Article{}
+	list.articles = []*Article{}
 
 	list.wg.Add(1)
 	go list.start()
@@ -71,19 +99,104 @@ func NewArticleList() *ArticleList {
 	return list
 }
 
-func (l *ArticleList) Add(a *Article) {
-	l.addCh <- a
+func (al *ArticleList) Add(a *Article) {
+	al.addCh <- a
 }
 
-func (l *ArticleList) Release(uuid uuid.UUID) (*Article, bool) {
-	l.delCh <- uuid
-	article := <-l.retCh
+func (al *ArticleList) Release(uuid uuid.UUID) (*Article, bool) {
+	al.delCh <- uuid
+	article := <-al.retCh
 	if article == nil {
 		return nil, false
 	}
 	return article, true
 }
 
-func (l *ArticleList) Get() []Article {
-	return <-l.getCh
+func (al *ArticleList) Get() []Article {
+	return <-al.getCh
+}
+
+func (al *ArticleList) Save(filename string) error {
+	file, err := os.Create(filename)
+	if err != nil {
+		return fmt.Errorf("error creating key file: %v", err)
+	}
+	defer file.Close()
+
+	encoder := gob.NewEncoder(file)
+	articles := al.Get()
+	err = encoder.Encode(articles)
+	if err != nil {
+		return fmt.Errorf("error ecoding key: %v", err)
+	}
+
+	return nil
+}
+
+func LoadArticleList(filename string) (*ArticleList, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return nil, fmt.Errorf("error opening key file: %v", err)
+	}
+
+	decoder := gob.NewDecoder(file)
+	articleList := NewArticleList()
+	err = decoder.Decode(&articleList.articles)
+	if err != nil {
+		return nil, fmt.Errorf("error decoding key: %v", err)
+	}
+
+	return articleList, nil
+}
+
+func NewTagList() *TagList {
+	list := minTagList()
+	list.tags = []string{}
+
+	list.wg.Add(1)
+	go list.start()
+	list.wg.Wait()
+
+	return list
+}
+
+func (tl *TagList) Add(tag string) {
+	tl.addCh <- tag
+}
+
+func (tl *TagList) Get() []string {
+	return <-tl.getCh
+}
+
+func (tl *TagList) Save(filename string) error {
+	file, err := os.Create(filename)
+	if err != nil {
+		return fmt.Errorf("error creating key file: %v", err)
+	}
+	defer file.Close()
+
+	encoder := gob.NewEncoder(file)
+	tags := tl.Get()
+	err = encoder.Encode(tags)
+	if err != nil {
+		return fmt.Errorf("error ecoding key: %v", err)
+	}
+
+	return nil
+}
+
+func LoadTagList(filename string) (*TagList, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return nil, fmt.Errorf("error opening key file: %v", err)
+	}
+
+	decoder := gob.NewDecoder(file)
+	tagList := NewTagList()
+	err = decoder.Decode(&tagList.tags)
+	if err != nil {
+		return nil, fmt.Errorf("error decoding key: %v", err)
+	}
+
+	return tagList, nil
 }

cmd/data/db.go

@@ -34,7 +34,7 @@ func OpenDB(dbName string) (*DB, error) {
 	return &db, nil
 }
 
-func (db *DB) AddUser(user User, pass string) error {
+func (db *DB) AddUser(user *User, pass string) error {
 	hashedPass, err := bcrypt.GenerateFromPassword([]byte(pass), bcrypt.DefaultCost)
 	if err != nil {
 		return fmt.Errorf("error creating password hash: %v", err)

cmd/ui/admin.go

@@ -11,11 +11,11 @@ import (
 )
 
 type AddUserData struct {
+	*data.User
 	Msg string
-	data.User
 }
 
-func inputsEmpty(user data.User, pass, pass2 string) bool {
+func inputsEmpty(user *data.User, pass, pass2 string) bool {
 	return len(user.UserName) == 0 ||
 		len(user.FirstName) == 0 ||
 		len(user.LastName) == 0 ||
@@ -23,7 +23,7 @@ func inputsEmpty(user data.User, pass, pass2 string) bool {
 		len(pass2) == 0
 }
 
-func checkUserStrings(user data.User) (string, int, bool) {
+func checkUserStrings(user *data.User) (string, int, bool) {
 	userLen := 15
 	nameLen := 50
 
@@ -38,14 +38,12 @@ func checkUserStrings(user data.User) (string, int, bool) {
 	}
 }
 
-func CreateUser() http.HandlerFunc {
-	return func(w http.ResponseWriter, r *http.Request) {
-		tmpl, err := template.ParseFiles("web/templates/add-user.html")
-		template.Must(tmpl, err).ExecuteTemplate(w, "page-content", nil)
-	}
+func CreateUser(w http.ResponseWriter, r *http.Request) {
+	tmpl, err := template.ParseFiles("web/templates/add-user.html")
+	template.Must(tmpl, err).ExecuteTemplate(w, "page-content", nil)
 }
 
-func AddUser(db *data.DB) http.HandlerFunc {
+func AddUser(db *data.DB, s *data.CookieStore) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		role, err := strconv.Atoi(r.PostFormValue("role"))
 		if err != nil {
@@ -55,7 +53,7 @@ func AddUser(db *data.DB) http.HandlerFunc {
 		}
 
 		htmlData := AddUserData{
-			User: data.User{
+			User: &data.User{
 				UserName:  r.PostFormValue("username"),
 				FirstName: r.PostFormValue("first-name"),
 				LastName:  r.PostFormValue("last-name"),
@@ -94,12 +92,36 @@ func AddUser(db *data.DB) http.HandlerFunc {
 			return
 		}
 
+		num, err := db.CountEntries()
+		if err != nil {
+			log.Println(err)
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		if num == 0 {
+			if htmlData.Role != data.Admin {
+				htmlData.Msg = "Der erste Benutzer muss ein Administrator sein."
+				htmlData.Role = data.Admin
+				tmpl, err := template.ParseFiles("web/templates/add-user.html")
+				tmpl = template.Must(tmpl, err)
+				tmpl.ExecuteTemplate(w, "page-content", htmlData)
+				return
+			}
+
+			if err := saveSession(w, r, s, htmlData.User); err != nil {
+				log.Println(err)
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
+		}
+
 		if err := db.AddUser(htmlData.User, pass); err != nil {
 			log.Println(err)
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
+
 		tmpl, err := template.ParseFiles("web/templates/hub.html")
-		template.Must(tmpl, err).ExecuteTemplate(w, "page-content", nil)
+		template.Must(tmpl, err).ExecuteTemplate(w, "page-content", 0)
 	}
 }

cmd/ui/articles.go

@@ -25,12 +25,14 @@ func ShowHub(s *data.CookieStore) http.HandlerFunc {
 	}
 }
 
-func WriteArticle(w http.ResponseWriter, r *http.Request) {
-	tmpl, err := template.ParseFiles("web/templates/editor.html")
-	template.Must(tmpl, err).ExecuteTemplate(w, "page-content", nil)
+func WriteArticle(tl *data.TagList) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		tmpl, err := template.ParseFiles("web/templates/editor.html")
+		template.Must(tmpl, err).ExecuteTemplate(w, "page-content", tl.Get())
+	}
 }
 
-func FinishArticle(l *data.ArticleList, s *data.CookieStore) http.HandlerFunc {
+func FinishArticle(al *data.ArticleList, s *data.CookieStore) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		article := new(data.Article)
 		var err error
@@ -68,7 +70,8 @@ func FinishArticle(l *data.ArticleList, s *data.CookieStore) http.HandlerFunc {
 		article.Created = time.Now()
 		article.AuthorID = session.Values["id"].(int64)
 
-		l.Add(article)
+		al.Add(article)
+		al.Save("tmp/articles.gob")
 
 		tmpl, err := template.ParseFiles("web/templates/hub.html")
 		tmpl = template.Must(tmpl, err)
@@ -76,14 +79,14 @@ func FinishArticle(l *data.ArticleList, s *data.CookieStore) http.HandlerFunc {
 	}
 }
 
-func ShowUnpublishedArticles(l *data.ArticleList) http.HandlerFunc {
+func ShowUnpublishedArticles(al *data.ArticleList) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		tmpl, err := template.ParseFiles("web/templates/unpublished-articles.html")
-		template.Must(tmpl, err).ExecuteTemplate(w, "page-content", l.Get())
+		template.Must(tmpl, err).ExecuteTemplate(w, "page-content", al.Get())
 	}
 }
 
-func ReviewArticle(l *data.ArticleList, s *data.CookieStore) http.HandlerFunc {
+func ReviewArticle(al *data.ArticleList, s *data.CookieStore) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		uuid, err := uuid.Parse(r.PostFormValue("uuid"))
 		if err != nil {
@@ -92,7 +95,7 @@ func ReviewArticle(l *data.ArticleList, s *data.CookieStore) http.HandlerFunc {
 			return
 		}
 
-		for _, article := range l.Get() {
+		for _, article := range al.Get() {
 			if article.UUID == uuid {
 				tmpl, err := template.ParseFiles("web/templates/to-be-published.html")
 				template.Must(tmpl, err).ExecuteTemplate(w, "page-content", article)
@@ -113,7 +116,7 @@ func ReviewArticle(l *data.ArticleList, s *data.CookieStore) http.HandlerFunc {
 	}
 }
 
-func PublishArticle(f *data.Feed, l *data.ArticleList, s *data.CookieStore) http.HandlerFunc {
+func PublishArticle(f *data.Feed, al *data.ArticleList, s *data.CookieStore) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		uuid, err := uuid.Parse(r.PostFormValue("uuid"))
 		if err != nil {
@@ -122,7 +125,7 @@ func PublishArticle(f *data.Feed, l *data.ArticleList, s *data.CookieStore) http
 			return
 		}
 
-		article, ok := l.Release(uuid)
+		article, ok := al.Release(uuid)
 		if !ok {
 			// TODO: Warnung anzeigen
 			// msg = "Alle Felder müssen ausgefüllt werden."
@@ -131,14 +134,6 @@ func PublishArticle(f *data.Feed, l *data.ArticleList, s *data.CookieStore) http
 			return
 		}
 
-		f.Add(&feeds.Item{
-			Title:       article.Title,
-			Created:     article.Created,
-			Description: article.Desc,
-			Content:     article.Content,
-		})
-		f.Save("tmp/rss.gob")
-
 		session, err := s.Get(r, "cookie")
 		if err != nil {
 			tmpl, err := template.ParseFiles("web/templates/login.html")
@@ -146,6 +141,15 @@ func PublishArticle(f *data.Feed, l *data.ArticleList, s *data.CookieStore) http
 			template.Must(tmpl, err).ExecuteTemplate(w, "page-content", msg)
 		}
 
+		f.Add(&feeds.Item{
+			Title:       article.Title,
+			Author:      &feeds.Author{Name: session.Values["name"].(string)},
+			Created:     article.Created,
+			Description: article.Desc,
+			Content:     article.Content,
+		})
+		f.Save("tmp/rss.gob")
+
 		tmpl, err := template.ParseFiles("web/templates/hub.html")
 		tmpl = template.Must(tmpl, err)
 		tmpl.ExecuteTemplate(w, "page-content", session.Values["role"])

cmd/ui/editor.go

@@ -0,0 +1,31 @@
+package ui
+
+import (
+	"html/template"
+	"net/http"
+
+	"streifling.com/jason/cpolis/cmd/data"
+)
+
+func CreateTag(w http.ResponseWriter, r *http.Request) {
+	tmpl, err := template.ParseFiles("web/templates/add-tag.html")
+	template.Must(tmpl, err).ExecuteTemplate(w, "page-content", nil)
+}
+
+func AddTag(tl *data.TagList, s *data.CookieStore) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		tl.Add(r.PostFormValue("tag"))
+		tl.Save("tmp/tags.gob")
+
+		session, err := s.Get(r, "cookie")
+		if err != nil {
+			tmpl, err := template.ParseFiles("web/templates/login.html")
+			msg := "Session nicht mehr gültig. Bitte erneut anmelden."
+			template.Must(tmpl, err).ExecuteTemplate(w, "page-content", msg)
+		}
+
+		tmpl, err := template.ParseFiles("web/templates/hub.html")
+		tmpl = template.Must(tmpl, err)
+		tmpl.ExecuteTemplate(w, "page-content", session.Values["role"])
+	}
+}

cmd/ui/sessions.go

@@ -1,6 +1,7 @@
 package ui
 
 import (
+	"fmt"
 	"html/template"
 	"log"
 	"net/http"
@@ -8,6 +9,23 @@ import (
 	"streifling.com/jason/cpolis/cmd/data"
 )
 
+func saveSession(w http.ResponseWriter, r *http.Request, s *data.CookieStore, u *data.User) error {
+	session, err := s.Get(r, "cookie")
+	if err != nil {
+		return fmt.Errorf("error getting session: %v", err)
+	}
+
+	session.Values["authenticated"] = true
+	session.Values["id"] = u.ID
+	session.Values["name"] = u.FirstName + u.LastName
+	session.Values["role"] = u.Role
+	if err := session.Save(r, w); err != nil {
+		return fmt.Errorf("error saving session: %v", err)
+	}
+
+	return nil
+}
+
 func HomePage(db *data.DB, s *data.CookieStore) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		numRows, err := db.CountEntries()
@@ -60,18 +78,7 @@ func Login(db *data.DB, s *data.CookieStore) http.HandlerFunc {
 			return
 		}
 
-		session, err := s.Get(r, "cookie")
-		if err != nil {
-			log.Println(err)
-			http.Error(w, err.Error(), http.StatusBadRequest)
-			return
-		}
-
-		session.Values["authenticated"] = true
-		session.Values["id"] = user.ID
-		session.Values["name"] = user.FirstName + user.LastName
-		session.Values["role"] = user.Role
-		if err := session.Save(r, w); err != nil {
+		if err := saveSession(w, r, s, user); err != nil {
 			log.Println(err)
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return

main.go

@@ -15,7 +15,8 @@ func init() {
 }
 
 func main() {
-	logFile, err := os.Create("tmp/cpolis.log")
+	logFile, err := os.OpenFile("tmp/cpolis.log",
+		os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)
 	if err != nil {
 		log.Fatalln(err)
 	}
@@ -46,23 +47,33 @@ func main() {
 	}
 	store := data.NewCookieStore(key)
 
-	articleList := data.NewArticleList()
+	articleList, err := data.LoadArticleList("tmp/articles.gob")
+	if err != nil {
+		articleList = data.NewArticleList()
+	}
+
+	tagList, err := data.LoadTagList("tmp/tags.gob")
+	if err != nil {
+		tagList = data.NewTagList()
+	}
 
 	mux := http.NewServeMux()
 	mux.Handle("/web/static/", http.StripPrefix("/web/static/", http.FileServer(http.Dir("web/static/"))))
 	mux.HandleFunc("/", ui.HomePage(db, store))
 
+	mux.HandleFunc("GET /create-tag/", ui.CreateTag)
+	mux.HandleFunc("GET /create-user/", ui.CreateUser)
 	mux.HandleFunc("GET /hub/", ui.ShowHub(store))
 	mux.HandleFunc("GET /rss/", ui.ShowRSS(feed))
+	mux.HandleFunc("GET /unpublished-articles/", ui.ShowUnpublishedArticles(articleList))
+	mux.HandleFunc("GET /write-article/", ui.WriteArticle(tagList))
 
-	mux.HandleFunc("POST /add-user/", ui.AddUser(db))
-	mux.HandleFunc("POST /create-user/", ui.CreateUser())
+	mux.HandleFunc("POST /add-tag/", ui.AddTag(tagList, store))
+	mux.HandleFunc("POST /add-user/", ui.AddUser(db, store))
 	mux.HandleFunc("POST /finish-article/", ui.FinishArticle(articleList, store))
 	mux.HandleFunc("POST /login/", ui.Login(db, store))
 	mux.HandleFunc("POST /review-article/", ui.ReviewArticle(articleList, store))
 	mux.HandleFunc("POST /publish-article/", ui.PublishArticle(feed, articleList, store))
-	mux.HandleFunc("POST /unpublished-articles/", ui.ShowUnpublishedArticles(articleList))
-	mux.HandleFunc("POST /write-article/", ui.WriteArticle)
 
 	log.Fatalln(http.ListenAndServe(":8080", mux))
 }

web/templates/add-tag.html

@@ -0,0 +1,8 @@
+{{define "page-content"}}
+<h2>Neuer Benutzer</h2>
+<form>
+    <input required name="tag" placeholder="Tag" type="text" />
+    <input type="submit" value="Anlegen" hx-post="/add-tag/" hx-target="#page-content" />
+</form>
+<button hx-get="/hub/" hx-target="#page-content">Abbrechen</button>
+{{end}}

web/templates/add-user.html

@@ -8,15 +8,16 @@
     <input required name="first-name" placeholder="Vorname" type="text" value="{{.FirstName}}" />
     <input required name="last-name" placeholder="Nachname" type="text" value="{{.LastName}}" />
 
+    <input required id="writer" name="role" type="radio" value="2" {{if eq .Role 2 }}checked{{end}} />
     <label for="writer">Schreiber</label>
-    <input required id="writer" name="role" type="radio" value="2" {{if eq .Role "2" }}checked{{end}} />
+    <input required id="editor" name="role" type="radio" value="1" {{if eq .Role 1 }}checked{{end}} />
     <label for="editor">Redakteur</label>
-    <input required id="editor" name="role" type="radio" value="1" {{if eq .Role "1" }}checked{{end}} />
+    <input required id="admin" name="role" type="radio" value="0" {{if eq .Role 0 }}checked{{end}} />
     <label for="admin">Admin</label>
-    <input required id="admin" name="role" type="radio" value="0" {{if eq .Role "0" }}checked{{end}} />
 
     <input type="submit" value="Anlegen" hx-post="/add-user/" hx-target="#page-content" />
 </form>
+<button hx-get="/hub/" hx-target="#page-content">Abbrechen</button>
 
 <script>
     var msg = "{{.Msg}}";

web/templates/editor.html

@@ -4,6 +4,10 @@
     <input name="editor-title" placeholder="Titel" type="text" />
     <textarea name="editor-desc" placeholder="Beschreibung"></textarea>
     <textarea name="editor-text" placeholder="Artikel"></textarea>
+    {{range .}}
+    <input id="{{.}}" name="tags" type="checkbox" value="{{.}}" />
+    <label for="{{.}}">{{.}}</label>
+    {{end}}
     <input type="submit" value="Senden" hx-post="/finish-article/" hx-target="#page-content" />
 </form>
 {{end}}

web/templates/hub.html

@@ -1,11 +1,12 @@
 {{define "page-content"}}
 <h2>Hub</h2>
-<button hx-post="/write-article/" hx-target="#page-content">Artikel schreiben</button>
-<button hx-post="/rss/" hx-target="#page-content">RSS Feed</button>
-{{if eq . 0}}
-<button hx-post="/create-user/" hx-target="#page-content">Benutzer hinzufügen</button>
-{{end}}
+<button hx-get="/write-article/" hx-target="#page-content">Artikel schreiben</button>
+<button hx-get="/rss/" hx-target="#page-content">RSS Feed</button>
 {{if lt . 2}}
-<button hx-post="/unpublished-articles/" hx-target="#page-content">Unveröffentlichte Artikel</button>
+<button hx-get="/unpublished-articles/" hx-target="#page-content">Unveröffentlichte Artikel</button>
+<button hx-get="/create-tag/" hx-target="#page-content">Neuer Tag</button>
+{{end}}
+{{if eq . 0}}
+<button hx-get="/create-user/" hx-target="#page-content">Benutzer hinzufügen</button>
 {{end}}
 {{end}}