invoiceninja/app/Libraries/Skype/InvoiceCard.php

<?php namespace App\Libraries\Skype;

use HTML;
use stdClass;

class InvoiceCard
{
    public function __construct($invoice)
    {
        $this->contentType = 'application/vnd.microsoft.card.receipt';
        $this->content = new stdClass;
        $this->content->facts = [];
        $this->content->items = [];
        $this->content->buttons = [];

        $this->setTitle('test');

        $this->setTitle(trans('texts.invoice_for_client', [
            'invoice' => link_to($invoice->getRoute(), $invoice->invoice_number),
            'client' => link_to($invoice->client->getRoute(), $invoice->client->getDisplayName())
        ]));

        $this->addFact(trans('texts.email'), HTML::mailto($invoice->client->contacts[0]->email)->toHtml());

        if ($invoice->due_date) {
            $this->addFact($invoice->present()->dueDateLabel, $invoice->present()->due_date);
        }

        if ($invoice->po_number) {
            $this->addFact(trans('texts.po_number'), $invoice->po_number);
        }

        if ($invoice->discount) {
            $this->addFact(trans('texts.discount'), $invoice->present()->discount);
        }

        foreach ($invoice->invoice_items as $item) {
            $this->addItem($item, $invoice->account);
        }

        $this->setTotal($invoice->present()->requestedAmount);

        $this->addButton('imBack', trans('texts.send_email'), 'send_email');
        $this->addButton('imBack', trans('texts.download_pdf'), 'download_pdf');
    }

    public function setTitle($title)
    {
        $this->content->title = $title;
    }

    public function setTotal($value)
    {
        $this->content->total = $value;
    }

    public function addFact($key, $value)
    {
        $fact = new stdClass;
        $fact->key = $key;
        $fact->value = $value;

        $this->content->facts[] = $fact;
    }

    public function addItem($item, $account)
    {
        $this->content->items[] = new InvoiceItemCard($item, $account);
    }

    public function addButton($type, $title, $value)
    {
        $this->content->buttons[] = new ButtonCard($type, $title, $value);
    }
}