storefile.ps1

# Return a random datastore file.
function Get-RandomStoreFile {
  # Get the file name and put it into an array
  [System.Array]$arr = Get-ChildItem -Path ./store_file -Include @("*.txt") -Name

  $count_arr = $arr.Count
  if ($count_arr -ge 2) {
    $num_select = Get-Random -Maximum $count_arr -Minimum 0
  }
  elseif ($count_arr -eq 1) {
    $num_select = 0
  }
  else {
    Write-ThereIsNoStoreFile
    return
  }
  $selected = $arr[$num_select]

  #	$fullpath = $store_fileDir + $selected
  #	Write-Host "[store file]: $selected"

  return $selected
}

function Get-Storefile {
  # Select the data store file
  $mode = Write-StorefileMode # ストアファイルのモード選択
  if (($mode -eq 'r') -or ($mode -eq 'R')) {
    # Set a random data store file
    $storefilename = Get-RandomStoreFile
    Write-Host "[store filename]: $storefilename"
  }
  elseif (($mode -eq 's') -or ($mode -eq 'S')) {
    # Selecting and setting a data store file
    $storefilename = Get-SelectStoreFile
    Write-Host "[store filename]: $storefilename"
  }
  $filename_store = $store_fileDir + $storefilename

  return $filename_store	
}

# Return a string registered in a datastore file at random
function Get-RandomRegisteredStr($storefilename) {
  # Read the registered contents from the file and put it into an array
  $arr_file = Get-Content -LiteralPath $storefilename -Encoding UTF8
  $count_arr = $arr_file.Count
  if ($count_arr -ge 2) {
    $num_select = Get-Random -Maximum $count_arr -Minimum 0
  }
  elseif ($count_arr -eq 1) {
    $num_select = 0
  }
  else {
    Write-ThereIsNoData
    return
  }

  $selectstr = $arr_file[$num_select]
  #	Write-Host "[Get-RandomRegisteredStr]selectstr: $selectstr num_all: $count_arr ,num_select: $num_select"
  Write-Host "[word selected]: $selectstr"

  return $selectstr
}