How can a string be divided into smaller strings as an array in Powershell, ensuring that none of them has a byte length greater than 'n' when encoded to UTF8?

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One way to achieve this in Powershell is by using the System.Text.Encoding.UTF8 class to encode the string as bytes, and then splitting the byte representation into smaller chunks based on the desired maximum size. Here's an example function that does this:

function Split-StringByMaxLength {
    param (
        [string]$String,
        [int]$MaxLength
    )

    $utf8Encoder = [System.Text.Encoding]::UTF8

    # Encode the string as UTF8 bytes
    $bytes = $utf8Encoder.GetBytes($String)

    # Split the bytes into smaller chunks based on the maximum length
    $byteChunks = for ($i = 0; $i -lt $bytes.Length; $i += $MaxLength) {
        $bytes[$i..($i + $MaxLength - 1)]
    }

    # Decode each chunk back into a string and return as an array
    $byteChunks | foreach { $utf8Encoder.GetString($_) }
}

Example usage:

PS > Split-StringByMaxLength "Lorem ipsum dolor sit amet, consectetur adipiscing elit.", 10
Lorem ipsu
m dolor si
t amet, co
nsectetur 
adipiscing
 elit.