Moved parameters to standalone fle

main.go

@@ -6,20 +6,28 @@ import (
 	"fmt"
 	"hackernewsletter/db"
 	"hackernewsletter/hackernews"
+	"hackernewsletter/params"
+	"log"
 
 	"github.com/aws/aws-sdk-go-v2/config"
 	"github.com/aws/aws-sdk-go-v2/service/dynamodb"
 )
 
 func main() {
+	conf, err := params.LoadConfig(".")
+	if err != nil {
+		log.Fatal("Cannot load config:", err)
+	}
+
 	table := flag.String("t", "", "The name of the table")
 	flag.Parse()
 
 	if *table == "" {
-		fmt.Println("You must specify a table name (-t TABLE)")
+		fmt.Println("Table name not specified. Using default name.")
+		table = &conf.TableName
 	}
 
-	cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithRegion("eu-central-1"))
+	cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithRegion(conf.AwsRegion))
 	if err != nil {
 		panic("Unable to load SDK config, " + err.Error())
 	}
@@ -43,16 +51,16 @@ func main() {
 		resp, err = db.GetTableInfo(context.TODO(), client, input)
 	}
 
-	fmt.Printf("Table %v has %v elements", *table, resp.Table.ItemCount)
+	fmt.Printf("Table %v has %v elements\n", *table, resp.Table.ItemCount)
 
-	newsIds := hackernews.GetTopNewsIds()
+	newsIds := hackernews.GetTopNewsIds(conf.TopNews)
 
 	var newsBatch []db.News
 
 	for i := 0; i < 10; i++ {
-		myNews := hackernews.GetNewsById(newsIds[i])
+		myNews := hackernews.GetNewsById(newsIds[i], conf.SingleNews)
 		newsBatch = append(newsBatch, myNews)
 	}
 
-	db.AddNewsBatch(newTable, newsBatch)
+	db.AddNewsBatch(newTable, newsBatch, conf.BatchSize)
 }