PhortuneCart.php
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Created: Fri, Nov 1, 20:46

PhortuneCart.php
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	<?php

	final class PhortuneCart extends PhortuneDAO
	implements
	PhabricatorApplicationTransactionInterface,
	PhabricatorPolicyInterface {

	const STATUS_BUILDING = 'cart:building';
	const STATUS_READY = 'cart:ready';
	const STATUS_PURCHASING = 'cart:purchasing';
	const STATUS_CHARGED = 'cart:charged';
	const STATUS_HOLD = 'cart:hold';
	const STATUS_REVIEW = 'cart:review';
	const STATUS_PURCHASED = 'cart:purchased';

	protected $accountPHID;
	protected $authorPHID;
	protected $merchantPHID;
	protected $subscriptionPHID;
	protected $cartClass;
	protected $status;
	protected $metadata = array();
	protected $mailKey;

	private $account = self::ATTACHABLE;
	private $purchases = self::ATTACHABLE;
	private $implementation = self::ATTACHABLE;
	private $merchant = self::ATTACHABLE;

	public static function initializeNewCart(
	PhabricatorUser $actor,
	PhortuneAccount $account,
	PhortuneMerchant $merchant) {
	$cart = id(new PhortuneCart())
	->setAuthorPHID($actor->getPHID())
	->setStatus(self::STATUS_BUILDING)
	->setAccountPHID($account->getPHID())
	->attachAccount($account)
	->setMerchantPHID($merchant->getPHID())
	->attachMerchant($merchant);

	$cart->account = $account;
	$cart->purchases = array();

	return $cart;
	}

	public function newPurchase(
	PhabricatorUser $actor,
	PhortuneProduct $product) {

	$purchase = PhortunePurchase::initializeNewPurchase($actor, $product)
	->setAccountPHID($this->getAccount()->getPHID())
	->setCartPHID($this->getPHID())
	->save();

	$this->purchases[] = $purchase;

	return $purchase;
	}

	public static function getStatusNameMap() {
	return array(
	self::STATUS_BUILDING => pht('Building'),
	self::STATUS_READY => pht('Ready'),
	self::STATUS_PURCHASING => pht('Purchasing'),
	self::STATUS_CHARGED => pht('Charged'),
	self::STATUS_HOLD => pht('Hold'),
	self::STATUS_REVIEW => pht('Review'),
	self::STATUS_PURCHASED => pht('Purchased'),
	);
	}

	public static function getNameForStatus($status) {
	return idx(self::getStatusNameMap(), $status, $status);
	}

	public function activateCart() {
	$this->openTransaction();
	$this->beginReadLocking();

	$copy = clone $this;
	$copy->reload();

	if ($copy->getStatus() !== self::STATUS_BUILDING) {
	throw new Exception(
	pht(
	'Cart has wrong status ("%s") to call willApplyCharge().',
	$copy->getStatus()));
	}

	$this->setStatus(self::STATUS_READY)->save();

	$this->endReadLocking();
	$this->saveTransaction();

	$this->recordCartTransaction(PhortuneCartTransaction::TYPE_CREATED);

	return $this;
	}

	public function willApplyCharge(
	PhabricatorUser $actor,
	PhortunePaymentProvider $provider,
	PhortunePaymentMethod $method = null) {

	$account = $this->getAccount();

	$charge = PhortuneCharge::initializeNewCharge()
	->setAccountPHID($account->getPHID())
	->setCartPHID($this->getPHID())
	->setAuthorPHID($actor->getPHID())
	->setMerchantPHID($this->getMerchant()->getPHID())
	->setProviderPHID($provider->getProviderConfig()->getPHID())
	->setAmountAsCurrency($this->getTotalPriceAsCurrency());

	if ($method) {
	$charge->setPaymentMethodPHID($method->getPHID());
	}

	$this->openTransaction();
	$this->beginReadLocking();

	$copy = clone $this;
	$copy->reload();

	if ($copy->getStatus() !== self::STATUS_READY) {
	throw new Exception(
	pht(
	'Cart has wrong status ("%s") to call willApplyCharge(), '.
	'expected "%s".',
	$copy->getStatus(),
	self::STATUS_READY));
	}

	$charge->save();
	$this->setStatus(PhortuneCart::STATUS_PURCHASING)->save();

	$this->endReadLocking();
	$this->saveTransaction();

	return $charge;
	}

	public function didHoldCharge(PhortuneCharge $charge) {
	$charge->setStatus(PhortuneCharge::STATUS_HOLD);

	$this->openTransaction();
	$this->beginReadLocking();

	$copy = clone $this;
	$copy->reload();

	if ($copy->getStatus() !== self::STATUS_PURCHASING) {
	throw new Exception(
	pht(
	'Cart has wrong status ("%s") to call didHoldCharge(), '.
	'expected "%s".',
	$copy->getStatus(),
	self::STATUS_PURCHASING));
	}

	$charge->save();
	$this->setStatus(self::STATUS_HOLD)->save();

	$this->endReadLocking();
	$this->saveTransaction();

	$this->recordCartTransaction(PhortuneCartTransaction::TYPE_HOLD);
	}

	public function didApplyCharge(PhortuneCharge $charge) {
	$charge->setStatus(PhortuneCharge::STATUS_CHARGED);

	$this->openTransaction();
	$this->beginReadLocking();

	$copy = clone $this;
	$copy->reload();

	if (($copy->getStatus() !== self::STATUS_PURCHASING) &&
	($copy->getStatus() !== self::STATUS_HOLD)) {
	throw new Exception(
	pht(
	'Cart has wrong status ("%s") to call didApplyCharge().',
	$copy->getStatus()));
	}

	$charge->save();
	$this->setStatus(self::STATUS_CHARGED)->save();

	$this->endReadLocking();
	$this->saveTransaction();

	// TODO: Perform purchase review. Here, we would apply rules to determine
	// whether the charge needs manual review (maybe making the decision via
	// Herald, configuration, or by examining provider fraud data). For now,
	// don't require review.
	$needs_review = false;

	if ($needs_review) {
	$this->willReviewCart();
	} else {
	$this->didReviewCart();
	}

	return $this;
	}

	public function willReviewCart() {
	$this->openTransaction();
	$this->beginReadLocking();

	$copy = clone $this;
	$copy->reload();

	if (($copy->getStatus() !== self::STATUS_CHARGED)) {
	throw new Exception(
	pht(
	'Cart has wrong status ("%s") to call willReviewCart()!',
	$copy->getStatus()));
	}

	$this->setStatus(self::STATUS_REVIEW)->save();

	$this->endReadLocking();
	$this->saveTransaction();

	$this->recordCartTransaction(PhortuneCartTransaction::TYPE_REVIEW);

	return $this;
	}

	public function didReviewCart() {
	$this->openTransaction();
	$this->beginReadLocking();

	$copy = clone $this;
	$copy->reload();

	if (($copy->getStatus() !== self::STATUS_CHARGED) &&
	($copy->getStatus() !== self::STATUS_REVIEW)) {
	throw new Exception(
	pht(
	'Cart has wrong status ("%s") to call didReviewCart()!',
	$copy->getStatus()));
	}

	foreach ($this->purchases as $purchase) {
	$purchase->getProduct()->didPurchaseProduct($purchase);
	}

	$this->setStatus(self::STATUS_PURCHASED)->save();

	$this->endReadLocking();
	$this->saveTransaction();

	$this->recordCartTransaction(PhortuneCartTransaction::TYPE_PURCHASED);

	return $this;
	}

	public function didFailCharge(PhortuneCharge $charge) {
	$charge->setStatus(PhortuneCharge::STATUS_FAILED);

	$this->openTransaction();
	$this->beginReadLocking();

	$copy = clone $this;
	$copy->reload();

	if (($copy->getStatus() !== self::STATUS_PURCHASING) &&
	($copy->getStatus() !== self::STATUS_HOLD)) {
	throw new Exception(
	pht(
	'Cart has wrong status ("%s") to call didFailCharge().',
	$copy->getStatus()));
	}

	$charge->save();

	// Move the cart back into STATUS_READY so the user can try
	// making the purchase again.
	$this->setStatus(self::STATUS_READY)->save();

	$this->endReadLocking();
	$this->saveTransaction();

	return $this;
	}


	public function willRefundCharge(
	PhabricatorUser $actor,
	PhortunePaymentProvider $provider,
	PhortuneCharge $charge,
	PhortuneCurrency $amount) {

	if (!$amount->isPositive()) {
	throw new Exception(
	pht('Trying to refund nonpositive amount of money!'));
	}

	if ($amount->isGreaterThan($charge->getAmountRefundableAsCurrency())) {
	throw new Exception(
	pht('Trying to refund more money than remaining on charge!'));
	}

	if ($charge->getRefundedChargePHID()) {
	throw new Exception(
	pht('Trying to refund a refund!'));
	}

	if (($charge->getStatus() !== PhortuneCharge::STATUS_CHARGED) &&
	($charge->getStatus() !== PhortuneCharge::STATUS_HOLD)) {
	throw new Exception(
	pht('Trying to refund an uncharged charge!'));
	}

	$refund_charge = PhortuneCharge::initializeNewCharge()
	->setAccountPHID($this->getAccount()->getPHID())
	->setCartPHID($this->getPHID())
	->setAuthorPHID($actor->getPHID())
	->setMerchantPHID($this->getMerchant()->getPHID())
	->setProviderPHID($provider->getProviderConfig()->getPHID())
	->setPaymentMethodPHID($charge->getPaymentMethodPHID())
	->setRefundedChargePHID($charge->getPHID())
	->setAmountAsCurrency($amount->negate());

	$charge->openTransaction();
	$charge->beginReadLocking();

	$copy = clone $charge;
	$copy->reload();

	if ($copy->getRefundingPHID() !== null) {
	throw new Exception(
	pht('Trying to refund a charge which is already refunding!'));
	}

	$refund_charge->save();
	$charge->setRefundingPHID($refund_charge->getPHID());
	$charge->save();

	$charge->endReadLocking();
	$charge->saveTransaction();

	return $refund_charge;
	}

	public function didRefundCharge(
	PhortuneCharge $charge,
	PhortuneCharge $refund) {

	$refund->setStatus(PhortuneCharge::STATUS_CHARGED);

	$this->openTransaction();
	$this->beginReadLocking();

	$copy = clone $charge;
	$copy->reload();

	if ($charge->getRefundingPHID() !== $refund->getPHID()) {
	throw new Exception(
	pht('Charge is in the wrong refunding state!'));
	}

	$charge->setRefundingPHID(null);

	// NOTE: There's some trickiness here to get the signs right. Both
	// these values are positive but the refund has a negative value.
	$total_refunded = $charge
	->getAmountRefundedAsCurrency()
	->add($refund->getAmountAsCurrency()->negate());

	$charge->setAmountRefundedAsCurrency($total_refunded);
	$charge->save();
	$refund->save();

	$this->endReadLocking();
	$this->saveTransaction();

	$amount = $refund->getAmountAsCurrency()->negate();
	foreach ($this->purchases as $purchase) {
	$purchase->getProduct()->didRefundProduct($purchase, $amount);
	}

	return $this;
	}

	public function didFailRefund(
	PhortuneCharge $charge,
	PhortuneCharge $refund) {

	$refund->setStatus(PhortuneCharge::STATUS_FAILED);

	$this->openTransaction();
	$this->beginReadLocking();

	$copy = clone $charge;
	$copy->reload();

	if ($charge->getRefundingPHID() !== $refund->getPHID()) {
	throw new Exception(
	pht('Charge is in the wrong refunding state!'));
	}

	$charge->setRefundingPHID(null);
	$charge->save();
	$refund->save();

	$this->endReadLocking();
	$this->saveTransaction();
	}

	private function recordCartTransaction($type) {
	$omnipotent_user = PhabricatorUser::getOmnipotentUser();
	$phortune_phid = id(new PhabricatorPhortuneApplication())->getPHID();

	$xactions = array();

	$xactions[] = id(new PhortuneCartTransaction())
	->setTransactionType($type)
	->setNewValue(true);

	$content_source = PhabricatorContentSource::newForSource(
	PhabricatorContentSource::SOURCE_PHORTUNE,
	array());

	$editor = id(new PhortuneCartEditor())
	->setActor($omnipotent_user)
	->setActingAsPHID($phortune_phid)
	->setContentSource($content_source)
	->setContinueOnMissingFields(true)
	->setContinueOnNoEffect(true);

	$editor->applyTransactions($this, $xactions);
	}

	public function getName() {
	return $this->getImplementation()->getName($this);
	}

	public function getDoneURI() {
	return $this->getImplementation()->getDoneURI($this);
	}

	public function getDoneActionName() {
	return $this->getImplementation()->getDoneActionName($this);
	}

	public function getCancelURI() {
	return $this->getImplementation()->getCancelURI($this);
	}

	public function getDetailURI(PhortuneMerchant $authority = null) {
	if ($authority) {
	$prefix = 'merchant/'.$authority->getID().'/';
	} else {
	$prefix = '';
	}
	return '/phortune/'.$prefix.'cart/'.$this->getID().'/';
	}

	public function getCheckoutURI() {
	return '/phortune/cart/'.$this->getID().'/checkout/';
	}

	public function canCancelOrder() {
	try {
	$this->assertCanCancelOrder();
	return true;
	} catch (Exception $ex) {
	return false;
	}
	}

	public function canRefundOrder() {
	try {
	$this->assertCanRefundOrder();
	return true;
	} catch (Exception $ex) {
	return false;
	}
	}

	public function assertCanCancelOrder() {
	switch ($this->getStatus()) {
	case self::STATUS_BUILDING:
	throw new Exception(
	pht(
	'This order can not be cancelled because the application has not '.
	'finished building it yet.'));
	case self::STATUS_READY:
	throw new Exception(
	pht(
	'This order can not be cancelled because it has not been placed.'));
	}

	return $this->getImplementation()->assertCanCancelOrder($this);
	}

	public function assertCanRefundOrder() {
	switch ($this->getStatus()) {
	case self::STATUS_BUILDING:
	throw new Exception(
	pht(
	'This order can not be refunded because the application has not '.
	'finished building it yet.'));
	case self::STATUS_READY:
	throw new Exception(
	pht(
	'This order can not be refunded because it has not been placed.'));
	}

	return $this->getImplementation()->assertCanRefundOrder($this);
	}

	protected function getConfiguration() {
	return array(
	self::CONFIG_AUX_PHID => true,
	self::CONFIG_SERIALIZATION => array(
	'metadata' => self::SERIALIZATION_JSON,
	),
	self::CONFIG_COLUMN_SCHEMA => array(
	'status' => 'text32',
	'cartClass' => 'text128',
	'mailKey' => 'bytes20',
	'subscriptionPHID' => 'phid?',
	),
	self::CONFIG_KEY_SCHEMA => array(
	'key_account' => array(
	'columns' => array('accountPHID'),
	),
	'key_merchant' => array(
	'columns' => array('merchantPHID'),
	),
	'key_subscription' => array(
	'columns' => array('subscriptionPHID'),
	),
	),
	) + parent::getConfiguration();
	}

	public function generatePHID() {
	return PhabricatorPHID::generateNewPHID(
	PhortuneCartPHIDType::TYPECONST);
	}

	public function save() {
	if (!$this->getMailKey()) {
	$this->setMailKey(Filesystem::readRandomCharacters(20));
	}
	return parent::save();
	}

	public function attachPurchases(array $purchases) {
	assert_instances_of($purchases, 'PhortunePurchase');
	$this->purchases = $purchases;
	return $this;
	}

	public function getPurchases() {
	return $this->assertAttached($this->purchases);
	}

	public function attachAccount(PhortuneAccount $account) {
	$this->account = $account;
	return $this;
	}

	public function getAccount() {
	return $this->assertAttached($this->account);
	}

	public function attachMerchant(PhortuneMerchant $merchant) {
	$this->merchant = $merchant;
	return $this;
	}

	public function getMerchant() {
	return $this->assertAttached($this->merchant);
	}

	public function attachImplementation(
	PhortuneCartImplementation $implementation) {
	$this->implementation = $implementation;
	return $this;
	}

	public function getImplementation() {
	return $this->assertAttached($this->implementation);
	}

	public function getTotalPriceAsCurrency() {
	$prices = array();
	foreach ($this->getPurchases() as $purchase) {
	$prices[] = $purchase->getTotalPriceAsCurrency();
	}

	return PhortuneCurrency::newFromList($prices);
	}

	public function setMetadataValue($key, $value) {
	$this->metadata[$key] = $value;
	return $this;
	}

	public function getMetadataValue($key, $default = null) {
	return idx($this->metadata, $key, $default);
	}


	/* -( PhabricatorApplicationTransactionInterface )------------------------- */


	public function getApplicationTransactionEditor() {
	return new PhortuneCartEditor();
	}

	public function getApplicationTransactionObject() {
	return $this;
	}

	public function getApplicationTransactionTemplate() {
	return new PhortuneCartTransaction();
	}

	public function willRenderTimeline(
	PhabricatorApplicationTransactionView $timeline,
	AphrontRequest $request) {

	return $timeline;
	}


	/* -( PhabricatorPolicyInterface )----------------------------------------- */


	public function getCapabilities() {
	return array(
	PhabricatorPolicyCapability::CAN_VIEW,
	PhabricatorPolicyCapability::CAN_EDIT,
	);
	}

	public function getPolicy($capability) {
	// NOTE: Both view and edit use the account's edit policy. We punch a hole
	// through this for merchants, below.
	return $this
	->getAccount()
	->getPolicy(PhabricatorPolicyCapability::CAN_EDIT);
	}

	public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
	if ($this->getAccount()->hasAutomaticCapability($capability, $viewer)) {
	return true;
	}

	// If the viewer controls the merchant this order was placed with, they
	// can view the order.
	if ($capability == PhabricatorPolicyCapability::CAN_VIEW) {
	$can_admin = PhabricatorPolicyFilter::hasCapability(
	$viewer,
	$this->getMerchant(),
	PhabricatorPolicyCapability::CAN_EDIT);
	if ($can_admin) {
	return true;
	}
	}

	return false;
	}

	public function describeAutomaticCapability($capability) {
	return array(
	pht('Orders inherit the policies of the associated account.'),
	pht('The merchant you placed an order with can review and manage it.'),
	);
	}

	}

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PhortuneCart.php
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