added multiple period input test

src/uis/quick_transaction/paycheck.rs

@@ -21,6 +21,7 @@ pub struct QuickPaycheckState {
     pub gross_amount: String,
     pub net_amount: String,
     selected: SelectedEntry,
+    has_error: Option<SelectedEntry>,
 }
 
 impl QuickPaycheckState {
@@ -29,6 +30,7 @@ impl QuickPaycheckState {
             net_amount: "".to_string(),
             gross_amount: "".to_string(),
             selected: SelectedEntry::Net,
+            has_error: None,
         }
     }
 
@@ -54,6 +56,7 @@ impl QuickPaycheckState {
             "Take home:",
             &state.net_amount,
             state.selected == SelectedEntry::Net,
+            state.has_error == Some(SelectedEntry::Net)
         );
 
         render_labled_entry_row(
@@ -62,9 +65,20 @@ impl QuickPaycheckState {
             "Gross:",
             &state.gross_amount,
             state.selected == SelectedEntry::Gross,
+            state.has_error == Some(SelectedEntry::Gross)
         );
     }
 
+    pub fn validate_input(&mut self) {
+        // The field only accepts digits and periods, so the only fail state
+        // should be multiple periods
+        if self.gross_amount.chars().filter(|c| *c == '.').count() > 1 {
+            self.has_error = Some(SelectedEntry::Gross);
+        } else if self.net_amount.chars().filter(|c| *c == '.').count() > 1 {
+            self.has_error = Some(SelectedEntry::Net);
+        }
+    }
+
     pub fn handle_event(event: KeyEvent, app: &mut App) {
         if event.kind == KeyEventKind::Press {
             match event.code {
@@ -80,6 +94,7 @@ impl QuickPaycheckState {
                             app.states.quick_transactions.paycheck_state.selected = SelectedEntry::Gross;
                         }
                     }
+                    app.states.quick_transactions.paycheck_state.validate_input();
                 }
                 KeyCode::Down | KeyCode::Tab => {
                     match app.states.quick_transactions.paycheck_state.selected {
@@ -93,14 +108,36 @@ impl QuickPaycheckState {
                             app.states.quick_transactions.paycheck_state.selected = SelectedEntry::Net;
                         }
                     }
+                    app.states.quick_transactions.paycheck_state.validate_input();
+                }
+                KeyCode::Enter => {
+                    app.states.quick_transactions.paycheck_state.validate_input();
+                    match app.states.quick_transactions.paycheck_state.selected {
+                        SelectedEntry::Net => {
+                            app.states.quick_transactions.paycheck_state.selected = SelectedEntry::Gross;
+                        }
+                        SelectedEntry::Gross => {
+                            app.states.quick_transactions.paycheck_state.selected = SelectedEntry::Execute;
+                        }
+                        SelectedEntry::Execute => {
+                            if app.states.quick_transactions.paycheck_state.has_error.is_none() {
+                                // TODO: actually do something here. E.g. Input validation, error
+                                // messages, and actual submissions
+                            }
+                        }
+                    }
                 }
                 KeyCode::Char(value) => {
                     match app.states.quick_transactions.paycheck_state.selected {
                         SelectedEntry::Net => {
-                            app.states.quick_transactions.paycheck_state.net_amount.push(value);
+                            if value.is_ascii_digit() || value == '.' {
+                                app.states.quick_transactions.paycheck_state.net_amount.push(value);
+                            }
                         }
                         SelectedEntry::Gross => {
-                            app.states.quick_transactions.paycheck_state.gross_amount.push(value);
+                            if value.is_ascii_digit() || value == '.' {
+                                app.states.quick_transactions.paycheck_state.gross_amount.push(value);
+                            }
                         }
                         _ => {}
                     }
@@ -134,6 +171,7 @@ fn render_labled_entry_row<B: Backend>(
     left_text: &str,
     right_text: &String,
     do_highlight: bool,
+    is_error: bool,
 ) {
     let horizontal_pieces = Layout::default()
         .direction(Direction::Horizontal)
@@ -150,10 +188,16 @@ fn render_labled_entry_row<B: Backend>(
         horizontal_pieces[0],
     );
 
-    let right_bg_color = if do_highlight {
+    let right_bg_color = {
-        Color::Yellow
+        if do_highlight {
-    } else {
+            Color::Yellow
-        Color::White
+        } else {
+            if is_error {
+                Color::LightRed
+            } else {
+                Color::White
+            }
+        }
     };
 
     f.render_widget(