Cache front page results

lib/database/database.go

@@ -26,19 +26,25 @@ type DB interface {
 	GetNews(num int, days int) (news []New, err error)
 	IncViews(ID string) error
 	IncDownloads(ID string) error
-	GetVisitedBooks(num int) (books []Book, err error)
-	GetDownloadedBooks(num int) (books []Book, err error)
-	GetTags() ([]string, error)
+	GetFrontPage() FrontPage
 }
 
 const (
-	tagsDisplay = 50
+	tagsDisplay    = 50
+	booksFrontPage = 6
 )
 
 type pgDB struct {
 	sql       *pg.DB
-	tags      []string
-	bookCount int
+	frontPage FrontPage
+}
+
+type FrontPage struct {
+	Count    int
+	Last     []Book
+	Visited  []Book
+	Download []Book
+	Tags     []string
 }
 
 // Options for the database
@@ -66,8 +72,7 @@ func Init(options Options) (DB, error) {
 
 	var db pgDB
 	db.sql = sql
-	go db.tagUpdater()
-	go db.countUpdater()
+	go db.frontPageUpdater()
 
 	return &db, nil
 }