Initial open-source release

packages/cli/src/prompt-navigation.ts

@@ -0,0 +1,45 @@
+const MULTISELECT_MENU_NAVIGATION_HINT =
+  'Use Up/Down to move, Space to select or unselect, Enter to confirm, Escape to go back, or Ctrl+C to exit.';
+const TEXT_INPUT_NAVIGATION_HINT = 'Press Escape to go back.';
+
+function removeTrailingBlankLines(message: string): string {
+  return message.replace(/\n+$/, '');
+}
+
+function withTextInputBodySpacing(message: string): string {
+  const normalized = removeTrailingBlankLines(message);
+  if (!normalized.includes('\n')) {
+    return normalized;
+  }
+  const [title, ...bodyLines] = normalized.split('\n');
+  if (bodyLines[0] === '') {
+    return normalized;
+  }
+  return `${title}\n\n${bodyLines.join('\n')}`;
+}
+
+export function withMenuOptionSpacing(message: string): string {
+  if (!message.includes('\n') || message.endsWith('\n')) {
+    return message;
+  }
+  return `${message}\n`;
+}
+
+export function withMenuOptionsSpacing<T extends { message: string }>(options: T): T {
+  return { ...options, message: withMenuOptionSpacing(options.message) };
+}
+
+export function withMultiselectNavigation(message: string): string {
+  if (message.includes(MULTISELECT_MENU_NAVIGATION_HINT)) {
+    return message;
+  }
+  return `${message}\n${MULTISELECT_MENU_NAVIGATION_HINT}`;
+}
+
+export function withTextInputNavigation(message: string): string {
+  const messageWithoutHint = removeTrailingBlankLines(message)
+    .split('\n')
+    .filter((line) => line !== TEXT_INPUT_NAVIGATION_HINT)
+    .join('\n');
+  return `${withTextInputBodySpacing(messageWithoutHint)}\n${TEXT_INPUT_NAVIGATION_HINT}\n`;
+}