<?php

class Mail
{
	public $to, $subject, $message, $fromEmail, $fromName, $replyEmail, $replyName, $attachments = array();

	public function create($to, $subject, $message)
	{
		$this->to = $to;
		$this->subject = $subject;
		$this->message = $message;
		return $this;
	}
	public function from($email, $name)
	{
		$this->fromEmail = $email;
		$this->fromName = $name;
		return $this;
	}
	public function reply($email, $name)
	{
		$this->replyEmail = $email;
		$this->replyName = $name;
		return $this;
	}
	public function attach($attachment)
	{
		$this->attachments[] = $attachment;
		return $this;
	}
	public function send()
	{
		$headers = array(
			'Authorization: Bearer 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',
			'Content-Type: application/json'
		);

		$data = array(
			'personalizations' => array(
				array(
					'to' => array(
						array(
							'email' => $this->to,
						)
					)
				)
			),
			'from' => array(
				'email' => $this->fromEmail,
				'name'  => $this->fromName,
			),
			'reply_to' => array(
				'email' => $this->replyEmail,
				'name'  => $this->replyName,
			),
			'subject' => $this->subject,
			'content' => array(
				array(
					'type' => 'text/html',
					'value' => $this->message
				)
			)
		);

		if (!empty($this->attachments) && isset($this->attachments) && is_array($this->attachments)) {
			foreach ($this->attachments as $k => $attachment) {
				$attachments[$k]['content']  = base64_encode(file_get_contents($attachment));
				$attachments[$k]['type']     = 'text/html';
				$attachments[$k]['filename'] = basename($attachment);
			}
			$data['attachments'] = $attachments;
		}

		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, 'https://api.sendgrid.com/v3/mail/send');
		curl_setopt($ch, CURLOPT_POST, 1);
		curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
		curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_exec($ch);
		curl_close($ch);

		$this->to = $this->subject = $this->message = $this->fromEmail = $this->fromName = $this->replyEmail = $this->replyName = $this->attachments = null;
	}
}