How to resolve the algorithm Nautical bell step by step in the PowerShell programming language

Published on 12 May 2024 09:40 PM
#Powershell

How to resolve the algorithm Nautical bell step by step in the PowerShell programming language

Table of Contents

Problem Statement

Write a small program that emulates a nautical bell producing a ringing bell pattern at certain times throughout the day. The bell timing should be in accordance with Greenwich Mean Time, unless locale dictates otherwise. It is permissible for the program to daemonize, or to slave off a scheduler, and it is permissible to use alternative notification methods (such as producing a written notice "Two Bells Gone"), if these are more usual for the system type.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Nautical bell step by step in the PowerShell programming language

Source code in the powershell programming language

function Get-Bell
{
    [CmdletBinding()]
    Param
    (
        [Parameter(Mandatory=$true,
                   Position=0)]
        [ValidateRange(1,12)]
        [int]
        $Hour,

        [Parameter(Mandatory=$true,
                   Position=1)]
        [ValidateSet(0,30)]
        [int]
        $Minute
    )

    $bells = @{
        OneBell    =          1
        TwoBells   =          2
        ThreeBells =       2, 1
        FourBells  =       2, 2
        FiveBells  =    2, 2, 1
        SixBells   =    2, 2, 2
        SevenBells = 2, 2, 2, 1
        EightBells = 2, 2, 2, 2
    }

    filter Invoke-Bell
    {
        if ($_ -eq 1)
        {
            [System.Media.SystemSounds]::Asterisk.Play()
            Write-Host -NoNewline "♪"
        }
        else
        {
            [System.Media.SystemSounds]::Exclamation.Play()
            Write-Host -NoNewline "♪♪  "
        }

        Start-Sleep -Milliseconds 500
    }


    $time = New-TimeSpan -Hours $Hour -Minutes $Minute

    switch ($time.Hours)
    {
         1 {if ($time.Minutes -eq 0) {$bells.TwoBells   | Invoke-Bell} else {$bells.ThreeBells | Invoke-Bell}; break}
         2 {if ($time.Minutes -eq 0) {$bells.FourBells  | Invoke-Bell} else {$bells.FiveBells  | Invoke-Bell}; break}
         3 {if ($time.Minutes -eq 0) {$bells.SixBells   | Invoke-Bell} else {$bells.SevenBells | Invoke-Bell}; break}
         4 {if ($time.Minutes -eq 0) {$bells.EightBells | Invoke-Bell} else {$bells.OneBell    | Invoke-Bell}; break}
         5 {if ($time.Minutes -eq 0) {$bells.TwoBells   | Invoke-Bell} else {$bells.ThreeBells | Invoke-Bell}; break}
         6 {if ($time.Minutes -eq 0) {$bells.FourBells  | Invoke-Bell} else {$bells.FiveBells  | Invoke-Bell}; break}
         7 {if ($time.Minutes -eq 0) {$bells.SixBells   | Invoke-Bell} else {$bells.SevenBells | Invoke-Bell}; break}
         8 {if ($time.Minutes -eq 0) {$bells.EightBells | Invoke-Bell} else {$bells.OneBell    | Invoke-Bell}; break}
         9 {if ($time.Minutes -eq 0) {$bells.TwoBells   | Invoke-Bell} else {$bells.ThreeBells | Invoke-Bell}; break}
        10 {if ($time.Minutes -eq 0) {$bells.FourBells  | Invoke-Bell} else {$bells.FiveBells  | Invoke-Bell}; break}
        11 {if ($time.Minutes -eq 0) {$bells.SixBells   | Invoke-Bell} else {$bells.SevenBells | Invoke-Bell}; break}
        12 {if ($time.Minutes -eq 0) {$bells.EightBells | Invoke-Bell} else {$bells.OneBell    | Invoke-Bell}}
    }

    Write-Host
}

Write-Host "Time Bells`n---- -----`n"

1..12 | ForEach-Object {

    $date = Get-Date -Hour $_ -Minute  0
    Write-Host -NoNewline "$($date.ToString("hh:mm")) "
    Get-Bell -Hour $_ -Minute  0

    $date = $date.AddMinutes(30)
    Write-Host -NoNewline "$($date.ToString("hh:mm")) "
    Get-Bell -Hour $_ -Minute 30
}

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