Implements follow link from history

commands/commands.go

@@ -126,8 +126,17 @@ func Get(db *sql.DB, url string) {
 	fmt.Println(text)
 }
 
-func Link(db *sql.DB, linkID int64) {
-	url, err := storage.GetLink(db, linkID)
+func Link(db *sql.DB, linkID int64, fromHistory bool) {
+
+	var url string
+	var err error
+
+	if fromHistory {
+		url, err = storage.GetHistoryUrl(db, linkID)
+	} else {
+		url, err = storage.GetLink(db, linkID)
+	}
+
 	if err != nil {
 		panic(err)
 	}

main.go

@@ -19,8 +19,9 @@ var (
 	get    = kingpin.Command("get", "Get url")
 	getUrl = get.Arg("url", "Url").Required().String()
 
-	link   = kingpin.Command("link", "Get link")
-	linkNo = link.Arg("no", "Number").Required().Int64()
+	link            = kingpin.Command("link", "Get link")
+	linkNo          = link.Arg("no", "Number").Required().Int64()
+	linkFromHistory = link.Flag("history", "Item from history").Bool()
 
 	historyList      = kingpin.Command("history", "List history")
 	historyListItems = historyList.Arg("items", "Amount of items").Int64()
@@ -38,7 +39,7 @@ func main() {
 	case "get":
 		commands.Get(db, *getUrl)
 	case "link":
-		commands.Link(db, *linkNo)
+		commands.Link(db, *linkNo, *linkFromHistory)
 	case "history":
 		commands.History(db, *historyListItems, 20, *historyListAll)
 	}

storage/storage.go

@@ -109,3 +109,15 @@ func GetHistory(db *sql.DB) (history []HistoryItem, err error) {
 
 	return
 }
+
+func GetHistoryUrl(db *sql.DB, historyID int64) (url string, err error) {
+	stmt, err := db.Prepare("SELECT `url` FROM `history` WHERE id=$1;")
+	if err != nil {
+		return
+	}
+	defer stmt.Close()
+
+	err = stmt.QueryRow(historyID).Scan(&url)
+
+	return
+}