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 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "[this doc on github](https://github.com/dotnet/interactive/tree/master/samples/notebooks/powershell)\n",
    "\n",
    "# Interactive Host Experience in PowerShell notebook"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "The PowerShell notebook provides a rich interactive experience through its host.\n",
    "The following are some examples."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "1. _You can set the foreground and background colors for the output. The code below sets the foreground color to `Blue`, and you can see the output is rendered in blue afterwards:_"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
     "language": "pwsh"
    }
   },
   "outputs": [],
   "source": [
    "$host.UI.RawUI.ForegroundColor = [System.ConsoleColor]::Blue\n",
    "$PSVersionTable"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "2. _You can write to the host with specified foreground and background colors_"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
     "language": "pwsh"
    }
   },
   "outputs": [],
   "source": [
    "Write-Host \"Something to think about ...\" -ForegroundColor Blue -BackgroundColor Gray"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "3. _Warning, Verbose, and Debug streams are rendered with the expected color:_"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
     "language": "pwsh"
    }
   },
   "outputs": [],
   "source": [
    "Write-Warning \"Warning\"\n",
    "Write-Verbose \"Verbose\" -Verbose\n",
    "Write-Debug \"Debug\" -Debug"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "4. _You can use `Write-Host -NoNewline` as expected:_"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
     "language": "pwsh"
    }
   },
   "outputs": [],
   "source": [
    "Write-Host \"Hello \" -NoNewline -ForegroundColor Red\n",
    "Write-Host \"World!\" -ForegroundColor Blue"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "5. _You can read from user for credential:_"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
     "language": "pwsh"
    }
   },
   "outputs": [],
   "source": [
    "$cred = Get-Credential\n",
    "\"$($cred.UserName), password received!\""
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "6. _You can read from user for regular input:_"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
     "language": "pwsh"
    }
   },
   "outputs": [],
   "source": [
    "Write-Verbose \"Ask for name\" -Verbose\n",
    "\n",
    "$name = Read-Host -Prompt \"What's your name? \"\n",
    "Write-Host \"Greetings, $name!\" -ForegroundColor DarkBlue"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "7. _You can read from user for password:_"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
     "language": "pwsh"
    }
   },
   "outputs": [],
   "source": [
    "Read-Host -Prompt \"token? \" -AsSecureString"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "8. _You can use the multi-selection when running commands:_"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
     "language": "pwsh"
    }
   },
   "outputs": [],
   "source": [
    "Get-Command nonExist -ErrorAction Inquire"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "9. _You can user the mandatory parameter prompts:_"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
     "language": "pwsh"
    }
   },
   "outputs": [],
   "source": [
    "Write-Output | ForEach-Object { \"I received '$_'\" }"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "10. _Of course, pipeline streaming works:_"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
     "language": "pwsh"
    }
   },
   "outputs": [],
   "source": [
    "Get-Process | select -First 5 | % { start-sleep -Milliseconds 300; $_ }"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "11. _Progress bar rendering works as expected:_"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
     "language": "pwsh"
    }
   },
   "outputs": [],
   "source": [
    "## Demo the progress bar\n",
    "For ($i=0; $i -le 100; $i++) {\n",
    "    Write-Progress -Id 1 -Activity \"Parent work progress\" -Status \"Current Count: $i\" -PercentComplete $i -CurrentOperation \"Counting ...\"\n",
    " \n",
    "    For ($j=0; $j -le 10; $j++) {\n",
    "        Start-Sleep -Milliseconds 5\n",
    "        Write-Progress -Parent 1 -Id 2 -Activity \"Child work progress\" -Status \"Current Count: $j\" -PercentComplete ($j*10) -CurrentOperation \"Working ...\"\n",
    "    }\n",
    "    \n",
    "    if ($i -eq 50) {\n",
    "        Write-Verbose \"working hard!!!\" -Verbose\n",
    "        \"Something to output\"\n",
    "    }\n",
    "}"
   ]
  },
  {
   "cell_type": "markdown",
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   "source": [
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