prevented crash on empty anime list selection

src/main.rs

@@ -110,25 +110,19 @@ fn main() {
 }
 
 fn print_help() {
-    println!("anime:\t\t{}", format_args!("{}", "-a --anime".red()));
+    println!("anime:\t\t{}\n", format_args!("{}", "-a --anime".red()));
     //print blank line
-    println!("");
     println!(
-        "cast:\t\t{}",
+        "cast:\t\t{}\n",
         format_args!("{} {}", "-C --cast".red(), "<IP Adress>".green())
     );
-    println!("");
-    println!("light novel:\t{}", format_args!("{}", "-l --ln".red()));
-    //print blank line
-    println!("");
-    println!("chapter:\t{}", format_args!("{}", "-c --chapter".red()));
+    println!("light novel:\t{}\n", format_args!("{}", "-l --ln".red()));
+    println!("chapter:\t{}\n", format_args!("{}", "-c --chapter".red()));
     println!(
         "{}",
         "after this^^^ argument you can enter a chapter number".green()
     );
-    println!("{}", "for exaple kami -c 200");
-    //print blank line
-    println!("");
+    println!("{}", "for exaple kami -c 200\n");
     println!("provider:\t{}", format_args!("{}", "-r --provider".red()));
     println!(
         "{}",
@@ -142,8 +136,11 @@ fn print_help() {
         "if the -r argument is not used it will default to {}",
         "zoro".green()
     );
-    println!("the providers are {} or {}", "gogo".green(), "zoro".green());
-    println!("");
+    println!(
+        "the providers are {} or {}\n",
+        "gogo".green(),
+        "zoro".green()
+    );
     println!("reader:\t\t{}", format_args!("{}", "-R --reader".red()));
     println!(
         "{}",
@@ -157,8 +154,7 @@ fn print_help() {
         "if the -R argument is not used it will default to {}",
         "bat".green()
     );
-    println!("the readers are {} or {}", "bat".green(), "glow".green());
-    println!("");
+    println!("the readers are {} or {}\n", "bat".green(), "glow".green());
     println!("help:\t\t{}", format_args!("{}", "-h --help".red()));
     //kill the program
     std::process::exit(0);

src/ui/app/anime.rs

@@ -103,6 +103,24 @@ impl<'a> KamiApp for App {
             terminal.draw(|f| self.ui(f))?;
 
             if let Event::Key(key) = event::read()? {
+                fn match_anime_list(this: &mut App, selected: Option<usize>) {
+                    match selected {
+                        Some(0) => match this.animes.2.len() {
+                            0 => {
+                                _ = 0;
+                            }
+                            _ => {
+                                this.image = this.animes.2[selected.unwrap()].clone();
+                                this.change_image();
+                            }
+                        },
+                        Some(std::usize::MAX) => _ = 0,
+                        _ => {
+                            this.image = this.animes.2[selected.unwrap()].clone();
+                            this.change_image();
+                        }
+                    }
+                }
                 match self.input_mode {
                     InputMode::Normal => match key.code {
                         KeyCode::Char('i') => {
@@ -120,8 +138,7 @@ impl<'a> KamiApp for App {
                             false => {
                                 self.messages.next();
                                 let selected = self.messages.state.selected();
-                                self.image = self.animes.2[selected.unwrap()].clone();
-                                self.change_image();
+                                match_anime_list(self, selected);
                             }
                         },
                         KeyCode::Char('j') => match ep_select {
@@ -131,8 +148,7 @@ impl<'a> KamiApp for App {
                             false => {
                                 self.messages.next();
                                 let selected = self.messages.state.selected();
-                                self.image = self.animes.2[selected.unwrap()].clone();
-                                self.change_image();
+                                match_anime_list(self, selected)
                             }
                         },
                         KeyCode::Up => match ep_select {
@@ -142,8 +158,7 @@ impl<'a> KamiApp for App {
                             false => {
                                 self.messages.previous();
                                 let selected = self.messages.state.selected();
-                                self.image = self.animes.2[selected.unwrap()].clone();
-                                self.change_image();
+                                match_anime_list(self, selected)
                             }
                         },
                         KeyCode::Char('k') => match ep_select {
@@ -153,8 +168,7 @@ impl<'a> KamiApp for App {
                             false => {
                                 self.messages.previous();
                                 let selected = self.messages.state.selected();
-                                self.image = self.animes.2[selected.unwrap()].clone();
-                                self.change_image();
+                                match_anime_list(self, selected)
                             }
                         },
                         //if KeyCode::Enter => {