Function getAlternateScreenshotPath

src/tools/FileReadTool/FileReadTool.ts:147–159

* For macOS screenshot paths with AM/PM, the space before AM/PM may be a * regular space or a thin space depending on the macOS version. Returns * the alternate path to try if the original doesn't exist, or undefined.

(filePath: string)

 * the alternate path to try if the original doesn't exist, or undefined.
 */
function getAlternateScreenshotPath(filePath: string): string | undefined {
  const filename = path.basename(filePath)
  const amPmPattern = /^(.+)([ \u202F])(AM|PM)(\.png)$/
  const match = filename.match(amPmPattern)
  if (!match) return undefined

  const currentSpace = match[2]
  const alternateSpace = currentSpace === ' ' ? THIN_SPACE : ' '
  return filePath.replace(
    `${currentSpace}${match[3]}${match[4]}`,
    `${alternateSpace}${match[3]}${match[4]}`,
  )
}

// File read listeners - allows other services to be notified when files are read
type FileReadListener = (filePath: string, content: string) => void