fix: out of bounds error, closes [#8]

use .is_some() and if let Some() to make sure that container indexes are still valid, without can cause out of bounds issue due to docker update frequencies

src/app_data/container_state.rs

@@ -160,7 +160,7 @@ impl DockerControls {
         match state {
             State::Dead | State::Exited => vec![Self::Start, Self::Restart],
             State::Paused => vec![Self::Unpause, Self::Stop],
-			State::Restarting => vec![Self::Stop],
+            State::Restarting => vec![Self::Stop],
             State::Running => vec![Self::Pause, Self::Restart, Self::Stop],
             _ => vec![],
         }

src/app_data/mod.rs

@@ -304,8 +304,10 @@ impl AppData {
                 if self.containers.state.selected().is_some() {
                     self.containers.previous();
                 }
-                // docker rm -f $(docker ps -aq) will cause this to crash
-                self.containers.items.remove(index);
+				// Check is some, else can cause out of bounds error, if containers get removed before a docker update
+                if self.containers.items.get(index).is_some() {
+                    self.containers.items.remove(index);
+                }
             }
         }
 

src/ui/draw_blocks.rs

@@ -265,36 +265,40 @@ pub fn draw_chart<B: Backend>(
             .direction(Direction::Horizontal)
             .constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
             .split(area);
-        let (cpu, mem) = app_data.lock().containers.items[index].get_chart_data();
 
-        let cpu_dataset = vec![Dataset::default()
-            .marker(symbols::Marker::Dot)
-            .style(Style::default().fg(Color::Magenta))
-            .graph_type(GraphType::Line)
-            .data(&cpu.0)];
+		// Check is some, else can cause out of bounds error, if containers get removed before a docker update
+        if let Some(data) = app_data.lock().containers.items.get(index) {
+            let (cpu, mem) = data.get_chart_data();
 
-        let mem_dataset = vec![Dataset::default()
-            .marker(symbols::Marker::Dot)
-            .style(Style::default().fg(Color::Cyan))
-            .graph_type(GraphType::Line)
-            .data(&mem.0)];
-        let cpu_chart = make_chart(
-            cpu.2,
-            String::from("cpu"),
-            cpu_dataset,
-            CpuStats::new(cpu.0.last().unwrap_or(&(0.00, 0.00)).1),
-            cpu.1,
-        );
-        let mem_chart = make_chart(
-            mem.2,
-            String::from("memory"),
-            mem_dataset,
-            ByteStats::new(mem.0.last().unwrap_or(&(0.0, 0.0)).1 as u64),
-            mem.1,
-        );
+            let cpu_dataset = vec![Dataset::default()
+                .marker(symbols::Marker::Dot)
+                .style(Style::default().fg(Color::Magenta))
+                .graph_type(GraphType::Line)
+                .data(&cpu.0)];
 
-        f.render_widget(cpu_chart, area[0]);
-        f.render_widget(mem_chart, area[1]);
+            let mem_dataset = vec![Dataset::default()
+                .marker(symbols::Marker::Dot)
+                .style(Style::default().fg(Color::Cyan))
+                .graph_type(GraphType::Line)
+                .data(&mem.0)];
+            let cpu_chart = make_chart(
+                cpu.2,
+                String::from("cpu"),
+                cpu_dataset,
+                CpuStats::new(cpu.0.last().unwrap_or(&(0.00, 0.00)).1),
+                cpu.1,
+            );
+            let mem_chart = make_chart(
+                mem.2,
+                String::from("memory"),
+                mem_dataset,
+                ByteStats::new(mem.0.last().unwrap_or(&(0.0, 0.0)).1 as u64),
+                mem.1,
+            );
+
+            f.render_widget(cpu_chart, area[0]);
+            f.render_widget(mem_chart, area[1]);
+        }
     }
 }