Function createSetVFile

core/src/virtual-files.ts:68–112

(
  setVFiles: (arg0: (vFiles: VFile[]) => VFile[]) => void
)

}

export const createSetVFile = (
  setVFiles: (arg0: (vFiles: VFile[]) => VFile[]) => void
) => pipply(createVFile, (rt, index?: -1 | undefined) => {
  const rtAlias = rt as VFile
  const parents: Iterable<string> = {
    [Symbol.iterator]: function* () {
      let parent = rtAlias.dirname
      while (parent !== '') {
        yield parent
        parent = parent.slice(0, parent.lastIndexOf('/'))
      }
    }
  }
  function autoCreateParent(vFiles: VFile[]) {
    const rtVFiles: VFile[] = []
    let insertIndex = -1
    for (const parent of parents) {
      // TODO map path to index
      insertIndex = vFiles.findIndex(vFile => vFile.path === parent)
      if (insertIndex !== -1) break
      rtVFiles.unshift(createVFile({ path: parent }) as VFile)
    }
    return [insertIndex, rtVFiles] as const
  }

  setVFiles(vFiles => {
    const [insertIndex, autoCreateParents] = autoCreateParent(vFiles)
    const [leftVFiles, rightVFiles] = insertIndex === -1
      ? [vFiles, []]
      : [vFiles.slice(0, insertIndex + 1), vFiles.slice(insertIndex + 1)]
    if (index === -1) {
      return [...leftVFiles, ...autoCreateParents, rtAlias, ...rightVFiles]
    } else {
      // TODO insert to the last child of parent children
      return [
        ...leftVFiles,
        ...rightVFiles.slice(0, autoCreateParents.length),
        ...autoCreateParents,
        rtAlias,
        ...rightVFiles.slice(autoCreateParents.length)
      ]
    }
  })
  return rt
})

type CreateSetVFileReturn = ReturnType<typeof createSetVFile>