Working navigation and selection functionality

.gitignore

@@ -4,6 +4,7 @@
 *.dll
 *.so
 *.dylib
+breakfast
 
 # Test binary, built with 
 *.test

main.go

@@ -19,13 +19,18 @@ type sessionOrCommand struct {
 
 type Choices [][]sessionOrCommand
 
+type SelectionSet map[int]struct{}
+
 type model struct {
 	activeSection int
 	cursor        []int
 	choices       Choices
-	selected      []map[int]struct{}
+	selected      []SelectionSet
 }
 
+var browserSelection SelectionSet
+var commandSelection SelectionSet
+
 func getBrowserSessions() []sessionOrCommand {
 	// Placeholder
 	return []sessionOrCommand{{
@@ -38,9 +43,11 @@ func getBrowserSessions() []sessionOrCommand {
 }
 
 func initialModel() model {
+	browserSelection = make(SelectionSet)
+	commandSelection = make(SelectionSet)
 	return model{
 		activeSection: BrowserSessions,
-		// Need syntax of two-dimensional slices
+		cursor:        []int{0, 0},
 		choices: Choices{
 			getBrowserSessions(),
 			[]sessionOrCommand{{
@@ -54,7 +61,7 @@ func initialModel() model {
 		// An array maps which indicates which choices are selected. We're
 		// using the map like a mathematical set. The keys refer to the
 		// indexes of the `choices` slice, above.
-		selected: make([]map[int]struct{}, 32, 32),
+		selected: []SelectionSet{browserSelection, commandSelection},
 	}
 }
 
@@ -68,31 +75,26 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		switch msg.String() {
 		case "ctrl+c", "q":
 			return m, tea.Quit
+		case "tab":
+			if m.activeSection == BrowserSessions {
+				m.activeSection = Commands
+			} else {
+				m.activeSection = BrowserSessions
+			}
 		case "up", "k":
 			if m.cursor[m.activeSection] > 0 {
 				m.cursor[m.activeSection]--
 			}
 		case "down", "j":
-			if m.cursor[m.activeSection] < len(m.browserSessions)+len(m.commands)-1 {
+			if m.cursor[m.activeSection] < len(m.choices[m.activeSection])-1 {
 				m.cursor[m.activeSection]++
 			}
 		case "enter", " ":
-			// TODO: Let's have two separate cursors, and have tab move the active
-			// set from brower sessions to terminals.
-			if m.cursor[m.activeSection] < len(m.browserSessions)-1 {
-				_, ok := m.selected[m.cursor]
-				if ok {
-					delete(m.selected, m.cursor)
-				} else {
-					m.selected[m.cursor] = struct{}{}
-				}
+			_, ok := m.selected[m.activeSection][m.cursor[m.activeSection]]
+			if ok {
+				delete(m.selected[m.activeSection], m.cursor[m.activeSection])
 			} else {
-				_, ok := m.selected[m.cursor]
-				if ok {
-					delete(m.selected, m.cursor)
-				} else {
-					m.selected[m.cursor] = struct{}{}
-				}
+				m.selected[m.activeSection][m.cursor[m.activeSection]] = struct{}{}
 			}
 		}
 	}
@@ -103,20 +105,24 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 func (m model) View() string {
 	s := "What should we buy at the market?\n\n"
 
-	for i, choice := range m.choices {
-		cursor := " "
-		if m.cursor == i {
-			cursor = ">"
-		}
+	for j := 0; j < 2; j++ {
+		for i, choice := range m.choices[j] {
+			cursor := " "
+			if m.cursor[j] == i {
+				cursor = ">"
+			}
 
-		checked := " "
-		if _, ok := m.selected[i]; ok {
-			checked = "x"
-		}
+			checked := " "
+			if _, ok := m.selected[j][i]; ok {
+				checked = "x"
+			}
 
-		s += fmt.Sprintf("%s [%s] %s\n", cursor, checked, choice)
+			s += fmt.Sprintf("%s [%s] %s\n", cursor, checked, choice.displayString)
+		}
+		s += "\n\n"
 	}
 
+	// s += fmt.Sprintf("\n%+v", m.selected) // debug
 	s += "\nPress q to quit.\n"
 
 	return s