improve args management

src/ui/table/args.rs

@@ -1,10 +1,21 @@
-use clap::Arg;
+use clap::{Arg, ArgMatches};
 
-/// Defines the max table width argument.
+const ARG_MAX_TABLE_WIDTH: &str = "max-table-width";
+
+pub(crate) type MaxTableWidth = Option<usize>;
+
+/// Represents the max table width argument.
 pub fn max_width<'a>() -> Arg<'a, 'a> {
-    Arg::with_name("max-table-width")
+    Arg::with_name(ARG_MAX_TABLE_WIDTH)
         .help("Defines a maximum width for the table")
         .short("w")
         .long("max-width")
         .value_name("INT")
 }
+
+/// Represents the max table width argument parser.
+pub fn parse_max_width<'a>(matches: &'a ArgMatches<'a>) -> Option<usize> {
+    matches
+        .value_of(ARG_MAX_TABLE_WIDTH)
+        .and_then(|width| width.parse::<usize>().ok())
+}