function Invoke-ModuleVulnerabilityScan {
    [CmdletBinding()]
    param(
        [Parameter(Mandatory=$true)]
        [string]$ModuleName
    )

    # 获取模块版本信息
    $module = Get-InstalledModule -Name $ModuleName -ErrorAction Stop
    
    # 调用漏洞数据库API
    $response = Invoke-RestMethod -Uri "https://vulndb.example.com/api/modules/$($module.Name)/$($module.Version)"
    
    # 生成安全报告
    [PSCustomObject]@{
        ModuleName = $module.Name
        Version = $module.Version
        Vulnerabilities = $response.vulns.Count
        Critical = $response.vulns | Where-Object { $_.severity -eq 'Critical' } | Measure-Object | Select-Object -Expand Count
        LastUpdated = $module.PublishedDate
    } | Export-Csv -Path "$env:TEMP\ModuleSecurityScan_$(Get-Date -Format yyyyMMdd).csv" -Append
}

# 扫描常用模块
'PSReadLine', 'Pester', 'Az' | ForEach-Object {
    Invoke-ModuleVulnerabilityScan -ModuleName $_ -Verbose
}

# ForEach循环示例
$services = Get-Service
$services | ForEach-Object {
    if ($_.Status -eq 'Running') {
        Write-Host $_.DisplayName
    }
}

# While循环应用场景
$counter = 0
while ($counter -lt 5) {
    Start-Process notepad
    $counter++
}

# 设置循环断点
$i=0
1..10 | ForEach-Object {
    $i++
    if ($i -eq 5) { break }
    $_
}

# 跟踪循环变量
Set-PSDebug -Trace 1
foreach ($file in (Get-ChildItem)) {
    $file.Basename
}

# 全局作用域示例
$global:config = 'Server1'

function Show-Config {
    # 局部作用域访问全局变量
    Write-Host $global:config
    
    # 声明私有变量
    $private:connection = 'Active'
}

Show-Config
# $connection 在此不可访问

# 错误的作用域继承示例
function Set-Value {
    $value = 100
}

Set-Value
Write-Host $value  # 输出为空

# 正确的作用域传递方式
function Get-Value {
    $script:value = 200
}

Get-Value
Write-Host $script:value  # 输出200

try {
    Get-Content -Path '不存在的文件.txt' -ErrorAction Stop
}
catch [System.IO.FileNotFoundException] {
    Write-Warning "文件未找到: $($_.Exception.Message)"
}
catch {
    Write-Error "未知错误: $_"
}
finally {
    Write-Output "清理操作完成"
}

# 自定义错误记录
$ErrorActionPreference = 'Continue'
$ErrorView = 'NormalView'

function Invoke-SafeOperation {
    [CmdletBinding()]
    param([scriptblock]$ScriptBlock)
    
    try {
        & $ScriptBlock
    }
    catch {
        [PSCustomObject]@{
            Timestamp = Get-Date
            ErrorType = $_.Exception.GetType().Name
            Message = $_.Exception.Message
            ScriptLine = $_.InvocationInfo.ScriptLineNumber
        } | Export-Csv -Path 'errors.log' -Append
    }
}

# 错误信息增强处理
$Error[0] | Select-Object *
$Error[0].InvocationInfo | Format-List *
$Error[0].Exception | Format-List *

function [<scope:>]<name> [([type]$parameter1[,[type]$parameter2])]
{
  param([type]$parameter1 [,[type]$parameter2])
  dynamicparam {<statement list>}
  begin {<statement list>}
  process {<statement list>}
  end {<statement list>}
}

function Operation{
   $num1 = 8
   $num2 = 2
   Write-Host "Multiply : $($num1*$num2)"
   Write-Host "Addition : $($num1+$num2)"
   Write-Host "Subtraction : $($num1-$num2)"
   Write-Host "Divide : $($num1 / $num2)"
}
Operation

function show-Message
{
    [CmdletBinding()]
    Param (
    [ Parameter (Mandatory = $true)]

        [string] $Name
    )
    Process
    {
        Write-Host ("Hi $Name !")
        write-host $Name "today is $(Get-Date)"
    }
}

show-message

Get-ChildItem -Path “C:\\NonexistentFolder” -ErrorAction Continue**

Get-Item -Path “C:\\NonexistentFile” -ErrorAction SilentlyContinue**

Remove-Item -Path “C:\\ImportantFile” -ErrorAction Stop**

set-executionpolicy RemoteSigned

get-executionpolicy

function Get-FrenchHoliday
{
    param
    (
        [int]
        $Year = (Get-Date).Year,

        [ValidateSet("alsace-moselle", "guadeloupe", "guyane", "la-reunion", "martinique", "mayotte", "metropole", "nouvelle-caledonie", "polynesie-francaise", "saint-barthelemy", "saint-martin", "saint-pierre-et-miquelon", "wallis-et-futuna")]
        [string]
        $Area = 'metropole',

        [switch]
        $NextOnly
    )

    $url = "https://calendrier.api.gouv.fr/jours-feries/$Area/$Year.json"

    $holidays = Invoke-RestMethod -Uri $url -UseBasicParsing

    foreach ($obj in $holidays.PSObject.Properties) {
        if (-Not ($NextOnly.IsPresent) -or (((([DateTime]$obj.Name).Ticks) - (Get-Date).Ticks) -gt 0)) {
            Write-Host "$($obj.Value) : $($obj.Name)"
        }
    }
}

Get-FrenchHoliday

Get-FrenchHoliday -NextOnly -Area guyane

Get-FrenchHoliday -Area "alsace-moselle" -Year 2024