One flag per user

database/books.go

@@ -37,6 +37,7 @@ type Book struct {
 	Cover               bool
 	Active              bool
 	BadQuality          int      `bad_quality`
+	BadQualityReporters []string `bad_quality_reporters`
 	Keywords            []string
 }
 
@@ -132,8 +133,24 @@ func updateBook(coll *mgo.Collection, id string, data map[string]interface{}) er
 	return coll.Update(bson.M{"id": id}, bson.M{"$set": data})
 }
 
-func flagBadQuality(coll *mgo.Collection, id string) error {
+func flagBadQuality(coll *mgo.Collection, id string, user string) error {
-	return coll.Update(bson.M{"id": id}, bson.M{"$inc": bson.M{"bad_quality": 1}})
+	b, err := getBookId(coll, id)
+	if err != nil {
+		return err
+	}
+
+	for _, reporter := range b.BadQualityReporters {
+		if reporter == user {
+			return nil
+		}
+	}
+	return coll.Update(
+		bson.M{"id": id},
+		bson.M{
+			"$inc":      bson.M{"bad_quality": 1},
+			"$addToSet": bson.M{"bad_quality_reporters": user},
+		},
+	)
 }
 
 func activeBook(coll *mgo.Collection, id string) error {

database/books_test.go

@@ -101,9 +101,9 @@ func TestFlag(t *testing.T) {
 	}
 	db.ActiveBook(id3)
 
-	db.FlagBadQuality(id)
+	db.FlagBadQuality(id, "1")
-	db.FlagBadQuality(id)
+	db.FlagBadQuality(id, "2")
-	db.FlagBadQuality(id3)
+	db.FlagBadQuality(id3, "1")
 
 	b, _ := db.GetBookId(id)
 	if b.BadQuality != 2 {

database/database.go

@@ -85,9 +85,9 @@ func (db *DB) UpdateBook(id string, data map[string]interface{}) error {
 	return updateBook(booksColl, id, data)
 }
 
-func (db *DB) FlagBadQuality(id string) error {
+func (db *DB) FlagBadQuality(id string, user string) error {
 	booksColl := db.session.DB(db.name).C(books_coll)
-	return flagBadQuality(booksColl, id)
+	return flagBadQuality(booksColl, id, user)
 }
 
 func (db *DB) ActiveBook(id string) error {

templates/book.html

@@ -1,6 +1,7 @@
 {{template "header.html" .S}}
 
 {{$isAdmin := .S.IsAdmin}}
+{{$flaggedBadQuality := .FlaggedBadQuality}}
 {{with .Book}}
 <script>
 function delBook(){
@@ -60,7 +61,7 @@ function delBook(){
 		{{end}}
 		<div class="pull-right">
 			<br />
-			<a href="/flag/bad_quality/{{.Id}}" class="btn btn-small"><i class="icon-warning-sign"></i> Report bad quality</a>
+			<a href="{{if $flaggedBadQuality}}#{{else}}/flag/bad_quality/{{.Id}}{{end}}" class="btn btn-small{{if $flaggedBadQuality}} disabled{{end}}"><i class="icon-warning-sign"></i> Report bad quality</a>
 		</div>
 	</div>
 	</div>

trantor.go

@@ -43,6 +43,7 @@ type bookData struct {
 	S                 Status
 	Book              database.Book
 	Description       []string
+	FlaggedBadQuality bool
 }
 
 func bookHandler(h handler) {
@@ -56,6 +57,13 @@ func bookHandler(h handler) {
 	}
 	data.Book = book
 	data.Description = strings.Split(data.Book.Description, "\n")
+	data.FlaggedBadQuality = false
+	for _, reporter := range book.BadQualityReporters {
+		if reporter == h.sess.User || reporter == h.sess.Id() {
+			data.FlaggedBadQuality = true
+			break
+		}
+	}
 	loadTemplate(h, "book", data)
 }
 
@@ -90,7 +98,11 @@ func downloadHandler(h handler) {
 
 func flagHandler(h handler) {
 	id := mux.Vars(h.r)["id"]
-	err := h.db.FlagBadQuality(id)
+	user := h.sess.Id()
+	if h.sess.User != "" {
+		user = h.sess.User
+	}
+	err := h.db.FlagBadQuality(id, user)
 	if err != nil {
 		log.Warn("An error ocurred while flaging ", id, ": ", err)
 	}