Check if opened

Former-commit-id: a9ee6c19c060ff6323c9657cb90f2b166a4f7103 [formerly d75dba0b429e79ac8d417dcf044496f8d735d803] [formerly 9413872d5aecf982e873fcf43bf87cec2acf3e98 [formerly 3ef10c9466]]
Former-commit-id: 7513366547dbac6a0778dbb49f1446092fc59842 [formerly f1f5d9eb16be383430f83b397c40c65ae0551ee9]
Former-commit-id: bd73123413245683c3a90e6ae46884fa901f6e35

db.go

@@ -43,11 +43,10 @@ type WikiData struct {
 }
 
 func hasPassword(title string) (bool, error) {
-	Open(RuntimeArgs.DatabaseLocation)
-	defer Close()
 	title = strings.ToLower(title)
 	if !open {
-		return false, fmt.Errorf("db must be opened before loading")
+		Open(RuntimeArgs.DatabaseLocation)
+		defer Close()
 	}
 	hasPassword := false
 	err := db.View(func(tx *bolt.Tx) error {
@@ -126,11 +125,10 @@ func getCurrentText(title string, version int) (string, []versionsInfo, bool, ti
 }
 
 func (p *WikiData) load(title string) error {
-	Open(RuntimeArgs.DatabaseLocation)
-	defer Close()
 	title = strings.ToLower(title)
 	if !open {
-		return fmt.Errorf("db must be opened before loading!")
+		Open(RuntimeArgs.DatabaseLocation)
+		defer Close()
 	}
 	err := db.View(func(tx *bolt.Tx) error {
 		var err error
@@ -162,10 +160,9 @@ func (p *WikiData) load(title string) error {
 }
 
 func (p *WikiData) save(newText string) error {
-	Open(RuntimeArgs.DatabaseLocation)
-	defer Close()
 	if !open {
-		return fmt.Errorf("db must be opened before saving")
+		Open(RuntimeArgs.DatabaseLocation)
+		defer Close()
 	}
 	err := db.Update(func(tx *bolt.Tx) error {
 		bucket, err := tx.CreateBucketIfNotExists([]byte("datas"))

main.go

@@ -61,9 +61,7 @@ Options:`)
 
 	if *dumpDataset {
 		fmt.Println("Dumping data to 'dump' folder...")
-		Open(RuntimeArgs.DatabaseLocation)
 		dumpEverything()
-		Close()
 		os.Exit(1)
 	}
 
@@ -87,7 +85,7 @@ Options:`)
 		panic(err)
 	}
 	Close()
-	
+
 	// Default page
 	aboutFile, _ := ioutil.ReadFile(path.Join(RuntimeArgs.SourcePath, "templates/aboutpage.md"))
 	p := WikiData{"help", "", []string{}, []string{}, false}