Fix bug with article navigation

internal/database/articles.go

@@ -138,15 +138,17 @@ func PreviousAndNextArticleUrlByID(store *Store, ID int) (nextUrl string, previo
 
 	nextResult, previousResult := "#", "#"
 	query, err := store.Prepare(`
-     select id,title, content, slug, original_url, source_id, created_at from articles where id = $1;
+     select id,title, content, slug, original_url, source_id, created_at from articles where id < $1 and id > $2 order by id desc limit 1;
 		 `)
 	if err != nil {
+		fmt.Println("Err 1:", err)
 		return nextResult, previousResult, err
 	}
 	defer query.Close()
 
-	row := query.QueryRow(ID - 1)
+	row := query.QueryRow(ID, 0)
 	if err != nil {
+		fmt.Println("Err 2:", err)
 		return nextResult, previousResult, err
 	}
 
@@ -159,14 +161,25 @@ func PreviousAndNextArticleUrlByID(store *Store, ID int) (nextUrl string, previo
 
 	previousResult = fmt.Sprintf("/%d/%s", r.ID, r.Slug)
 
-	row = query.QueryRow(ID + 1)
+	query2, err := store.Prepare(`
+     select id,title, content, slug, original_url, source_id, created_at from articles where id < $1 and id > $2 order by id asc limit 1;
+		 `)
 	if err != nil {
+		fmt.Println("Err 1:", err)
+		return nextResult, previousResult, err
+	}
+	defer query2.Close()
+
+	row = query2.QueryRow(ID+1000, ID)
+	if err != nil {
+		fmt.Println("Err 3:", err)
 		return nextResult, previousResult, err
 	}
 
 	content = ""
 	err = row.Scan(&r.ID, &r.Title, &content, &r.Slug, &r.OriginalUrl, &r.SourceId, &r.CreatedAt)
 	if err != nil {
+		fmt.Println("Err 4:", err)
 		return nextResult, previousResult, err
 	}
 	nextResult = fmt.Sprintf("/%d/%s", r.ID, r.Slug)