function Test-FileHash {
    param(
        # FilePath
        [string]$Path,
        # Algorithm
        [string]$Algorithm = "SHA256",
        # Compare Hash
        [string]$Hash
    )

    begin {
        $file = Get-Item $Path
        if ($Hash) { break }
        $parent = $file.Directory
        if ('hash.json' -notin ($parent.GetFiles().Name)) { break }
        $fileList = Get-Content "hash.json" | ConvertFrom-Json
        if ($file.Name -notin $fileList.FileName) { break }
        $record = $fileList | Where-Object FileName -eq $file.Name
        $Algorithm = $record.Algorithm
        $Hash = $record.Hash
    }

    process {
        $fileHash = Get-FileHash $Path -Algorithm $Algorithm
        $result = @{
            FileName    = $Path
            OriChecksum = $Hash
            FileHash    = $fileHash.Hash
            Verify      = $Hash.ToUpper() -eq $fileHash.Hash
        }
    }

    end {
        return $result
    }
}

function Test-FilesHash {
    $fileList = Get-Content "hash.json" | ConvertFrom-Json
    $result = @()
    $fileList | ForEach-Object {
        if (Test-Path $_.FileName) {
            $result += (Test-FileHash $_.FileName)
        }
    }
    $result | Format-Table
}

Test-FilesHash