| const MAX_SUGGESTIONS = 5; |
| /** |
| * Given [ A, B, C ] return ' Did you mean A, B, or C?'. |
| */ |
| |
| export function didYouMean(firstArg, secondArg) { |
| const [subMessage, suggestionsArg] = secondArg |
| ? [firstArg, secondArg] |
| : [undefined, firstArg]; |
| let message = ' Did you mean '; |
| |
| if (subMessage) { |
| message += subMessage + ' '; |
| } |
| |
| const suggestions = suggestionsArg.map((x) => `"${x}"`); |
| |
| switch (suggestions.length) { |
| case 0: |
| return ''; |
| |
| case 1: |
| return message + suggestions[0] + '?'; |
| |
| case 2: |
| return message + suggestions[0] + ' or ' + suggestions[1] + '?'; |
| } |
| |
| const selected = suggestions.slice(0, MAX_SUGGESTIONS); |
| const lastItem = selected.pop(); |
| return message + selected.join(', ') + ', or ' + lastItem + '?'; |
| } |