PhabricatorProfileMenuEngine.php
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PhabricatorProfileMenuEngine.php
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	<?php

	abstract class PhabricatorProfileMenuEngine extends Phobject {

	private $viewer;
	private $profileObject;
	private $customPHID;
	private $items;
	private $controller;
	private $navigation;
	private $editMode;
	private $pageClasses = array();
	private $showContentCrumbs = true;

	const ITEM_CUSTOM_DIVIDER = 'engine.divider';
	const ITEM_MANAGE = 'item.configure';

	const MODE_COMBINED = 'combined';
	const MODE_GLOBAL = 'global';
	const MODE_CUSTOM = 'custom';

	public function setViewer(PhabricatorUser $viewer) {
	$this->viewer = $viewer;
	return $this;
	}

	public function getViewer() {
	return $this->viewer;
	}

	public function setProfileObject($profile_object) {
	$this->profileObject = $profile_object;
	return $this;
	}

	public function getProfileObject() {
	return $this->profileObject;
	}

	public function setCustomPHID($custom_phid) {
	$this->customPHID = $custom_phid;
	return $this;
	}

	public function getCustomPHID() {
	return $this->customPHID;
	}

	private function getEditModeCustomPHID() {
	$mode = $this->getEditMode();

	switch ($mode) {
	case self::MODE_CUSTOM:
	$custom_phid = $this->getCustomPHID();
	break;
	case self::MODE_GLOBAL:
	default:
	$custom_phid = null;
	break;
	}

	return $custom_phid;
	}

	public function setController(PhabricatorController $controller) {
	$this->controller = $controller;
	return $this;
	}

	public function getController() {
	return $this->controller;
	}

	public function addContentPageClass($class) {
	$this->pageClasses[] = $class;
	return $this;
	}

	public function setShowContentCrumbs($show_content_crumbs) {
	$this->showContentCrumbs = $show_content_crumbs;
	return $this;
	}

	public function getShowContentCrumbs() {
	return $this->showContentCrumbs;
	}

	abstract public function getItemURI($path);
	abstract protected function isMenuEngineConfigurable();

	/**
	* @return array of PhabricatorProfileMenuItemConfiguration objects
	*/
	abstract protected function getBuiltinProfileItems($object);

	protected function getBuiltinCustomProfileItems(
	$object,
	$custom_phid) {
	return array();
	}

	protected function getEditMode() {
	return $this->editMode;
	}

	public function buildResponse() {
	$controller = $this->getController();

	$viewer = $controller->getViewer();
	$this->setViewer($viewer);

	$request = $controller->getRequest();

	$item_action = $request->getURIData('itemAction');
	if (!$item_action) {
	$item_action = 'view';
	}

	$is_view = ($item_action == 'view');

	// If the engine is not configurable, don't respond to any of the editing
	// or configuration routes.
	if (!$this->isMenuEngineConfigurable()) {
	if (!$is_view) {
	return new Aphront404Response();
	}
	}

	$item_id = $request->getURIData('itemID');

	// If we miss on the MenuEngine route, try the EditEngine route. This will
	// be populated while editing items.
	if (!$item_id) {
	$item_id = $request->getURIData('id');
	}

	$view_list = $this->newProfileMenuItemViewList();

	if ($is_view) {
	$selected_item = $this->selectViewItem($view_list, $item_id);
	} else {
	if (!phutil_nonempty_scalar($item_id)) {
	$item_id = self::ITEM_MANAGE;
	}
	$selected_item = $this->selectEditItem($view_list, $item_id);
	}

	switch ($item_action) {
	case 'view':
	// If we were not able to select an item, we're still going to render
	// a page state. For example, this happens when you create a new
	// portal for the first time.
	break;
	case 'info':
	case 'hide':
	case 'default':
	case 'builtin':
	if (!$selected_item) {
	return new Aphront404Response();
	}
	break;
	case 'edit':
	if (!$request->getURIData('id')) {
	// If we continue along the "edit" pathway without an ID, we hit an
	// unrelated exception because we can not build a new menu item out
	// of thin air. For menus, new items are created via the "new"
	// action. Just catch this case and 404 early since there's currently
	// no clean way to make EditEngine aware of this.
	return new Aphront404Response();
	}
	break;
	}

	$navigation = $view_list->newNavigationView();
	$crumbs = $controller->buildApplicationCrumbsForEditEngine();

	if (!$is_view) {
	$edit_mode = null;

	if ($selected_item) {
	if ($selected_item->getBuiltinKey() !== self::ITEM_MANAGE) {
	if ($selected_item->getCustomPHID()) {
	$edit_mode = 'custom';
	} else {
	$edit_mode = 'global';
	}
	}
	}

	if ($edit_mode === null) {
	$edit_mode = $request->getURIData('itemEditMode');
	}

	$available_modes = $this->getViewerEditModes();
	if ($available_modes) {
	$available_modes = array_fuse($available_modes);
	if (isset($available_modes[$edit_mode])) {
	$this->editMode = $edit_mode;
	} else {
	if ($item_action != 'configure') {
	return new Aphront404Response();
	}
	}
	}
	$page_title = pht('Configure Menu');
	} else {
	if ($selected_item) {
	$page_title = $selected_item->getDisplayName();
	} else {
	$page_title = pht('Empty');
	}
	}

	switch ($item_action) {
	case 'view':
	if ($selected_item) {
	try {
	$content = $this->buildItemViewContent($selected_item);
	} catch (Exception $ex) {
	$content = id(new PHUIInfoView())
	->setTitle(pht('Unable to Render Dashboard'))
	->setErrors(array($ex->getMessage()));
	}

	$crumbs->addTextCrumb($selected_item->getDisplayName());
	} else {
	$content = $this->newNoContentView($this->getItems());
	}

	if (!$content) {
	$content = $this->newEmptyView(
	pht('Empty'),
	pht('There is nothing here.'));
	}
	break;
	case 'configure':
	$mode = $this->getEditMode();
	if (!$mode) {
	$crumbs->addTextCrumb(pht('Configure Menu'));
	$content = $this->buildMenuEditModeContent();
	} else {
	if (count($available_modes) > 1) {
	$crumbs->addTextCrumb(
	pht('Configure Menu'),
	$this->getItemURI('configure/'));

	switch ($mode) {
	case self::MODE_CUSTOM:
	$crumbs->addTextCrumb(pht('Personal'));
	break;
	case self::MODE_GLOBAL:
	$crumbs->addTextCrumb(pht('Global'));
	break;
	}
	} else {
	$crumbs->addTextCrumb(pht('Configure Menu'));
	}
	$edit_list = $this->loadItems($mode);
	$content = $this->buildItemConfigureContent($edit_list);
	}
	break;
	case 'reorder':
	$mode = $this->getEditMode();
	$edit_list = $this->loadItems($mode);
	$content = $this->buildItemReorderContent($edit_list);
	break;
	case 'new':
	$item_key = $request->getURIData('itemKey');
	$mode = $this->getEditMode();
	$content = $this->buildItemNewContent($item_key, $mode);
	break;
	case 'builtin':
	$content = $this->buildItemBuiltinContent($selected_item);
	break;
	case 'hide':
	$content = $this->buildItemHideContent($selected_item);
	break;
	case 'default':
	if (!$this->isMenuEnginePinnable()) {
	return new Aphront404Response();
	}
	$content = $this->buildItemDefaultContent($selected_item);
	break;
	case 'edit':
	$content = $this->buildItemEditContent();
	break;
	default:
	throw new Exception(
	pht(
	'Unsupported item action "%s".',
	$item_action));
	}

	if ($content instanceof AphrontResponse) {
	return $content;
	}

	if ($content instanceof AphrontResponseProducerInterface) {
	return $content;
	}

	$crumbs->setBorder(true);

	$page = $controller->newPage()
	->setTitle($page_title)
	->appendChild($content);

	if (!$is_view \|\| $this->getShowContentCrumbs()) {
	$page->setCrumbs($crumbs);
	}

	$page->setNavigation($navigation);

	if ($is_view) {
	foreach ($this->pageClasses as $class) {
	$page->addClass($class);
	}
	}

	return $page;
	}

	private function getItems() {
	if ($this->items === null) {
	$this->items = $this->loadItems(self::MODE_COMBINED);
	}

	return $this->items;
	}

	private function loadItems($mode) {
	$viewer = $this->getViewer();
	$object = $this->getProfileObject();

	$items = $this->loadBuiltinProfileItems($mode);

	$query = id(new PhabricatorProfileMenuItemConfigurationQuery())
	->setViewer($viewer)
	->withProfilePHIDs(array($object->getPHID()));

	switch ($mode) {
	case self::MODE_GLOBAL:
	$query->withCustomPHIDs(array(), true);
	break;
	case self::MODE_CUSTOM:
	$query->withCustomPHIDs(array($this->getCustomPHID()), false);
	break;
	case self::MODE_COMBINED:
	$query->withCustomPHIDs(array($this->getCustomPHID()), true);
	break;
	}

	$stored_items = $query->execute();

	foreach ($stored_items as $stored_item) {
	$impl = $stored_item->getMenuItem();
	$impl->setViewer($viewer);
	$impl->setEngine($this);
	}

	// Merge the stored items into the builtin items. If a builtin item has
	// a stored version, replace the defaults with the stored changes.
	foreach ($stored_items as $stored_item) {
	if (!$stored_item->shouldEnableForObject($object)) {
	continue;
	}

	$builtin_key = $stored_item->getBuiltinKey();
	if ($builtin_key !== null) {
	// If this builtin actually exists, replace the builtin with the
	// stored configuration. Otherwise, we're just going to drop the
	// stored config: it corresponds to an out-of-date or uninstalled
	// item.
	if (isset($items[$builtin_key])) {
	$builtin_item = $items[$builtin_key];

	// Copy runtime properties from the builtin item to the stored item.
	$stored_item->setIsHeadItem($builtin_item->getIsHeadItem());
	$stored_item->setIsTailItem($builtin_item->getIsTailItem());

	$items[$builtin_key] = $stored_item;
	} else {
	continue;
	}
	} else {
	$items[] = $stored_item;
	}
	}

	return $this->arrangeItems($items, $mode);
	}

	private function loadBuiltinProfileItems($mode) {
	$object = $this->getProfileObject();

	switch ($mode) {
	case self::MODE_GLOBAL:
	$builtins = $this->getBuiltinProfileItems($object);
	break;
	case self::MODE_CUSTOM:
	$builtins = $this->getBuiltinCustomProfileItems(
	$object,
	$this->getCustomPHID());
	break;
	case self::MODE_COMBINED:
	$builtins = array();
	$builtins[] = $this->getBuiltinCustomProfileItems(
	$object,
	$this->getCustomPHID());
	$builtins[] = $this->getBuiltinProfileItems($object);
	$builtins = array_mergev($builtins);
	break;
	}

	$items = PhabricatorProfileMenuItem::getAllMenuItems();
	$viewer = $this->getViewer();

	$order = 1;
	$map = array();
	foreach ($builtins as $builtin) {
	$builtin_key = $builtin->getBuiltinKey();

	if (!$builtin_key) {
	throw new Exception(
	pht(
	'Object produced a builtin item with no builtin item key! '.
	'Builtin items must have a unique key.'));
	}

	if (isset($map[$builtin_key])) {
	throw new Exception(
	pht(
	'Object produced two items with the same builtin key ("%s"). '.
	'Each item must have a unique builtin key.',
	$builtin_key));
	}

	$item_key = $builtin->getMenuItemKey();

	$item = idx($items, $item_key);
	if (!$item) {
	throw new Exception(
	pht(
	'Builtin item ("%s") specifies a bad item key ("%s"); there '.
	'is no corresponding item implementation available.',
	$builtin_key,
	$item_key));
	}

	$item = clone $item;
	$item->setViewer($viewer);
	$item->setEngine($this);

	$builtin
	->setProfilePHID($object->getPHID())
	->attachMenuItem($item)
	->attachProfileObject($object)
	->setMenuItemOrder($order);

	if (!$builtin->shouldEnableForObject($object)) {
	continue;
	}

	$map[$builtin_key] = $builtin;

	$order++;
	}

	return $map;
	}

	public function getConfigureURI() {
	$mode = $this->getEditMode();

	switch ($mode) {
	case self::MODE_CUSTOM:
	return $this->getItemURI('configure/custom/');
	case self::MODE_GLOBAL:
	return $this->getItemURI('configure/global/');
	}

	return $this->getItemURI('configure/');
	}

	private function buildItemReorderContent(array $items) {
	$viewer = $this->getViewer();
	$object = $this->getProfileObject();

	// If you're reordering global items, you need to be able to edit the
	// object the menu appears on. If you're reordering custom items, you only
	// need to be able to edit the custom object. Currently, the custom object
	// is always the viewing user's own user object.
	$custom_phid = $this->getEditModeCustomPHID();

	if (!$custom_phid) {
	PhabricatorPolicyFilter::requireCapability(
	$viewer,
	$object,
	PhabricatorPolicyCapability::CAN_EDIT);
	} else {
	$policy_object = id(new PhabricatorObjectQuery())
	->setViewer($viewer)
	->withPHIDs(array($custom_phid))
	->executeOne();

	if (!$policy_object) {
	throw new Exception(
	pht(
	'Failed to load custom PHID "%s"!',
	$custom_phid));
	}

	PhabricatorPolicyFilter::requireCapability(
	$viewer,
	$policy_object,
	PhabricatorPolicyCapability::CAN_EDIT);
	}

	$controller = $this->getController();
	$request = $controller->getRequest();

	$request->validateCSRF();

	$order = $request->getStrList('order');

	$by_builtin = array();
	$by_id = array();

	foreach ($items as $key => $item) {
	$id = $item->getID();
	if ($id) {
	$by_id[$id] = $key;
	continue;
	}

	$builtin_key = $item->getBuiltinKey();
	if ($builtin_key) {
	$by_builtin[$builtin_key] = $key;
	continue;
	}
	}

	$key_order = array();
	foreach ($order as $order_item) {
	if (isset($by_id[$order_item])) {
	$key_order[] = $by_id[$order_item];
	continue;
	}
	if (isset($by_builtin[$order_item])) {
	$key_order[] = $by_builtin[$order_item];
	continue;
	}
	}

	$items = array_select_keys($items, $key_order) + $items;

	$type_order =
	PhabricatorProfileMenuItemConfigurationTransaction::TYPE_ORDER;

	$order = 1;
	foreach ($items as $item) {
	$xactions = array();

	$xactions[] = id(new PhabricatorProfileMenuItemConfigurationTransaction())
	->setTransactionType($type_order)
	->setNewValue($order);

	$editor = id(new PhabricatorProfileMenuEditor())
	->setContentSourceFromRequest($request)
	->setActor($viewer)
	->setContinueOnMissingFields(true)
	->setContinueOnNoEffect(true)
	->applyTransactions($item, $xactions);

	$order++;
	}

	return id(new AphrontRedirectResponse())
	->setURI($this->getConfigureURI());
	}

	protected function buildItemViewContent(
	PhabricatorProfileMenuItemConfiguration $item) {
	return $item->newPageContent();
	}

	private function getViewerEditModes() {
	$modes = array();

	$viewer = $this->getViewer();

	if ($viewer->isLoggedIn() && $this->isMenuEnginePersonalizable()) {
	$modes[] = self::MODE_CUSTOM;
	}

	$object = $this->getProfileObject();
	$can_edit = PhabricatorPolicyFilter::hasCapability(
	$viewer,
	$object,
	PhabricatorPolicyCapability::CAN_EDIT);

	if ($can_edit) {
	$modes[] = self::MODE_GLOBAL;
	}

	return $modes;
	}

	protected function isMenuEnginePersonalizable() {
	return true;
	}

	/**
	* Does this engine support pinning items?
	*
	* Personalizable menus disable pinning by default since it creates a number
	* of weird edge cases without providing many benefits for current menus.
	*
	* @return bool True if items may be pinned as default items.
	*/
	public function isMenuEnginePinnable() {
	return !$this->isMenuEnginePersonalizable();
	}

	private function buildMenuEditModeContent() {
	$viewer = $this->getViewer();

	$modes = $this->getViewerEditModes();
	if (!$modes) {
	return new Aphront404Response();
	}

	if (count($modes) == 1) {
	$mode = head($modes);
	return id(new AphrontRedirectResponse())
	->setURI($this->getItemURI("configure/{$mode}/"));
	}

	$menu = id(new PHUIObjectItemListView())
	->setUser($viewer);

	$modes = array_fuse($modes);

	if (isset($modes['custom'])) {
	$menu->addItem(
	id(new PHUIObjectItemView())
	->setHeader(pht('Personal Menu Items'))
	->setHref($this->getItemURI('configure/custom/'))
	->setImageURI($viewer->getProfileImageURI())
	->addAttribute(pht('Edit the menu for your personal account.')));
	}

	if (isset($modes['global'])) {
	$icon = id(new PHUIIconView())
	->setIcon('fa-globe')
	->setBackground('bg-blue');

	$menu->addItem(
	id(new PHUIObjectItemView())
	->setHeader(pht('Global Menu Items'))
	->setHref($this->getItemURI('configure/global/'))
	->setImageIcon($icon)
	->addAttribute(pht('Edit the global default menu for all users.')));
	}

	$box = id(new PHUIObjectBoxView())
	->setObjectList($menu);

	$header = id(new PHUIHeaderView())
	->setHeader(pht('Manage Menu'))
	->setHeaderIcon('fa-list');

	return id(new PHUITwoColumnView())
	->setHeader($header)
	->setFooter($box);
	}

	private function buildItemConfigureContent(array $items) {
	$viewer = $this->getViewer();
	$object = $this->getProfileObject();

	$filtered_groups = mgroup($items, 'getMenuItemKey');
	foreach ($filtered_groups as $group) {
	$first_item = head($group);
	$first_item->willGetMenuItemViewList($group);
	}

	// Users only need to be able to edit the object which this menu appears
	// on if they're editing global menu items. For example, users do not need
	// to be able to edit the Favorites application to add new items to the
	// Favorites menu.
	if (!$this->getCustomPHID()) {
	PhabricatorPolicyFilter::requireCapability(
	$viewer,
	$object,
	PhabricatorPolicyCapability::CAN_EDIT);
	}

	$list_id = celerity_generate_unique_node_id();

	$mode = $this->getEditMode();

	Javelin::initBehavior(
	'reorder-profile-menu-items',
	array(
	'listID' => $list_id,
	'orderURI' => $this->getItemURI("reorder/{$mode}/"),
	));

	$list = id(new PHUIObjectItemListView())
	->setID($list_id)
	->setNoDataString(pht('This menu currently has no items.'));

	$any_draggable = false;
	foreach ($items as $item) {
	$id = $item->getID();
	$builtin_key = $item->getBuiltinKey();

	$can_edit = PhabricatorPolicyFilter::hasCapability(
	$viewer,
	$item,
	PhabricatorPolicyCapability::CAN_EDIT);

	$view = id(new PHUIObjectItemView());

	$name = $item->getDisplayName();
	$type = $item->getMenuItemTypeName();
	if (!strlen(trim($name))) {
	$name = pht('Untitled "%s" Item', $type);
	}

	$view->setHeader($name);
	$view->addAttribute($type);

	$icon = $item->getMenuItem()->getMenuItemTypeIcon();
	if ($icon !== null) {
	$view->setStatusIcon($icon);
	}

	if ($can_edit) {
	$can_move = (!$item->getIsHeadItem() && !$item->getIsTailItem());
	if ($can_move) {
	$view
	->setGrippable(true)
	->addSigil('profile-menu-item')
	->setMetadata(
	array(
	'key' => nonempty($id, $builtin_key),
	));
	$any_draggable = true;
	} else {
	$view->setGrippable(false);
	}

	if ($id) {
	$default_uri = $this->getItemURI("default/{$id}/");
	} else {
	$default_uri = $this->getItemURI("default/{$builtin_key}/");
	}

	$default_text = null;

	if ($this->isMenuEnginePinnable()) {
	if ($item->isDefault()) {
	$default_icon = 'fa-thumb-tack green';
	$default_text = pht('Current Default');
	} else if ($item->canMakeDefault()) {
	$default_icon = 'fa-thumb-tack';
	$default_text = pht('Make Default');
	}
	}

	if ($default_text !== null) {
	$view->addAction(
	id(new PHUIListItemView())
	->setHref($default_uri)
	->setWorkflow(true)
	->setName($default_text)
	->setIcon($default_icon));
	}

	if ($id) {
	$view->setHref($this->getItemURI("edit/{$id}/"));
	$hide_uri = $this->getItemURI("hide/{$id}/");
	} else {
	$view->setHref($this->getItemURI("builtin/{$builtin_key}/"));
	$hide_uri = $this->getItemURI("hide/{$builtin_key}/");
	}

	if ($item->isDisabled()) {
	$hide_icon = 'fa-plus';
	$hide_text = pht('Enable');
	} else if ($item->getBuiltinKey() !== null) {
	$hide_icon = 'fa-times';
	$hide_text = pht('Disable');
	} else {
	$hide_icon = 'fa-times';
	$hide_text = pht('Delete');
	}

	$can_disable = $item->canHideMenuItem();

	$view->addAction(
	id(new PHUIListItemView())
	->setHref($hide_uri)
	->setWorkflow(true)
	->setDisabled(!$can_disable)
	->setName($hide_text)
	->setIcon($hide_icon));
	}

	if ($item->isDisabled()) {
	$view->setDisabled(true);
	}

	$list->addItem($view);
	}

	$item_types = PhabricatorProfileMenuItem::getAllMenuItems();
	$object = $this->getProfileObject();

	$action_list = id(new PhabricatorActionListView())
	->setViewer($viewer);

	// See T12167. This makes the "Actions" dropdown button show up in the
	// page header.
	$action_list->setID(celerity_generate_unique_node_id());

	$action_list->addAction(
	id(new PhabricatorActionView())
	->setLabel(true)
	->setName(pht('Add New Menu Item...')));

	foreach ($item_types as $item_type) {
	if (!$item_type->canAddToObject($object)) {
	continue;
	}

	$item_key = $item_type->getMenuItemKey();
	$edit_mode = $this->getEditMode();

	$action_list->addAction(
	id(new PhabricatorActionView())
	->setIcon($item_type->getMenuItemTypeIcon())
	->setName($item_type->getMenuItemTypeName())
	->setHref($this->getItemURI("new/{$edit_mode}/{$item_key}/"))
	->setWorkflow(true));
	}

	$action_list->addAction(
	id(new PhabricatorActionView())
	->setLabel(true)
	->setName(pht('Documentation')));

	$doc_link = PhabricatorEnv::getDoclink('Profile Menu User Guide');
	$doc_name = pht('Profile Menu User Guide');

	$action_list->addAction(
	id(new PhabricatorActionView())
	->setIcon('fa-book')
	->setHref($doc_link)
	->setName($doc_name));

	$header = id(new PHUIHeaderView())
	->setHeader(pht('Menu Items'))
	->setHeaderIcon('fa-list');

	$list_header = id(new PHUIHeaderView())
	->setHeader(pht('Current Menu Items'));

	if ($any_draggable) {
	$list_header->setSubheader(
	pht('Drag items in this list to reorder them.'));
	}

	$box = id(new PHUIObjectBoxView())
	->setHeader($list_header)
	->setBackground(PHUIObjectBoxView::BLUE_PROPERTY)
	->setObjectList($list);

	$curtain = id(new PHUICurtainView())
	->setViewer($viewer)
	->setActionList($action_list);

	$view = id(new PHUITwoColumnView())
	->setHeader($header)
	->setCurtain($curtain)
	->setMainColumn(
	array(
	$box,
	));

	return $view;
	}

	private function buildItemNewContent($item_key, $mode) {
	$item_types = PhabricatorProfileMenuItem::getAllMenuItems();
	$item_type = idx($item_types, $item_key);
	if (!$item_type) {
	return new Aphront404Response();
	}

	$object = $this->getProfileObject();
	if (!$item_type->canAddToObject($object)) {
	return new Aphront404Response();
	}

	$custom_phid = $this->getEditModeCustomPHID();

	$configuration = PhabricatorProfileMenuItemConfiguration::initializeNewItem(
	$object,
	$item_type,
	$custom_phid);

	$viewer = $this->getViewer();

	PhabricatorPolicyFilter::requireCapability(
	$viewer,
	$configuration,
	PhabricatorPolicyCapability::CAN_EDIT);

	$controller = $this->getController();

	return id(new PhabricatorProfileMenuEditEngine())
	->setMenuEngine($this)
	->setProfileObject($object)
	->setNewMenuItemConfiguration($configuration)
	->setCustomPHID($custom_phid)
	->setController($controller)
	->buildResponse();
	}

	private function buildItemEditContent() {
	$viewer = $this->getViewer();
	$object = $this->getProfileObject();
	$controller = $this->getController();
	$custom_phid = $this->getEditModeCustomPHID();

	return id(new PhabricatorProfileMenuEditEngine())
	->setMenuEngine($this)
	->setProfileObject($object)
	->setController($controller)
	->setCustomPHID($custom_phid)
	->buildResponse();
	}

	private function buildItemBuiltinContent(
	PhabricatorProfileMenuItemConfiguration $configuration) {

	// If this builtin item has already been persisted, redirect to the
	// edit page.
	$id = $configuration->getID();
	if ($id) {
	return id(new AphrontRedirectResponse())
	->setURI($this->getItemURI("edit/{$id}/"));
	}

	// Otherwise, act like we're creating a new item, we're just starting
	// with the builtin template.
	$viewer = $this->getViewer();

	PhabricatorPolicyFilter::requireCapability(
	$viewer,
	$configuration,
	PhabricatorPolicyCapability::CAN_EDIT);

	$object = $this->getProfileObject();
	$controller = $this->getController();
	$custom_phid = $this->getEditModeCustomPHID();

	return id(new PhabricatorProfileMenuEditEngine())
	->setIsBuiltin(true)
	->setMenuEngine($this)
	->setProfileObject($object)
	->setNewMenuItemConfiguration($configuration)
	->setController($controller)
	->setCustomPHID($custom_phid)
	->buildResponse();
	}

	private function buildItemHideContent(
	PhabricatorProfileMenuItemConfiguration $configuration) {

	$controller = $this->getController();
	$request = $controller->getRequest();
	$viewer = $this->getViewer();

	PhabricatorPolicyFilter::requireCapability(
	$viewer,
	$configuration,
	PhabricatorPolicyCapability::CAN_EDIT);

	if (!$configuration->canHideMenuItem()) {
	return $controller->newDialog()
	->setTitle(pht('Mandatory Item'))
	->appendParagraph(
	pht('This menu item is very important, and can not be disabled.'))
	->addCancelButton($this->getConfigureURI());
	}

	if ($configuration->getBuiltinKey() === null) {
	$new_value = null;

	$title = pht('Delete Menu Item');
	$body = pht('Delete this menu item?');
	$button = pht('Delete Menu Item');
	} else if ($configuration->isDisabled()) {
	$new_value = PhabricatorProfileMenuItemConfiguration::VISIBILITY_VISIBLE;

	$title = pht('Enable Menu Item');
	$body = pht(
	'Enable this menu item? It will appear in the menu again.');
	$button = pht('Enable Menu Item');
	} else {
	$new_value = PhabricatorProfileMenuItemConfiguration::VISIBILITY_DISABLED;

	$title = pht('Disable Menu Item');
	$body = pht(
	'Disable this menu item? It will no longer appear in the menu, but '.
	'you can re-enable it later.');
	$button = pht('Disable Menu Item');
	}

	$v_visibility = $configuration->getVisibility();
	if ($request->isFormPost()) {
	if ($new_value === null) {
	$configuration->delete();
	} else {
	$type_visibility =
	PhabricatorProfileMenuItemConfigurationTransaction::TYPE_VISIBILITY;

	$xactions = array();

	$xactions[] =
	id(new PhabricatorProfileMenuItemConfigurationTransaction())
	->setTransactionType($type_visibility)
	->setNewValue($new_value);

	$editor = id(new PhabricatorProfileMenuEditor())
	->setContentSourceFromRequest($request)
	->setActor($viewer)
	->setContinueOnMissingFields(true)
	->setContinueOnNoEffect(true)
	->applyTransactions($configuration, $xactions);
	}

	return id(new AphrontRedirectResponse())
	->setURI($this->getConfigureURI());
	}

	return $controller->newDialog()
	->setTitle($title)
	->appendParagraph($body)
	->addCancelButton($this->getConfigureURI())
	->addSubmitButton($button);
	}

	private function buildItemDefaultContent(
	PhabricatorProfileMenuItemConfiguration $configuration) {

	$controller = $this->getController();
	$request = $controller->getRequest();
	$viewer = $this->getViewer();

	PhabricatorPolicyFilter::requireCapability(
	$viewer,
	$configuration,
	PhabricatorPolicyCapability::CAN_EDIT);

	$done_uri = $this->getConfigureURI();

	if (!$configuration->canMakeDefault()) {
	return $controller->newDialog()
	->setTitle(pht('Not Defaultable'))
	->appendParagraph(
	pht(
	'This item can not be set as the default item. This is usually '.
	'because the item has no page of its own, or links to an '.
	'external page.'))
	->addCancelButton($done_uri);
	}

	if ($configuration->isDefault()) {
	return $controller->newDialog()
	->setTitle(pht('Already Default'))
	->appendParagraph(
	pht(
	'This item is already set as the default item for this menu.'))
	->addCancelButton($done_uri);
	}

	if ($request->isFormPost()) {
	$key = $configuration->getID();
	if (!$key) {
	$key = $configuration->getBuiltinKey();
	}

	$this->adjustDefault($key);

	return id(new AphrontRedirectResponse())
	->setURI($done_uri);
	}

	return $controller->newDialog()
	->setTitle(pht('Make Default'))
	->appendParagraph(
	pht(
	'Set this item as the default for this menu? Users arriving on '.
	'this page will be shown the content of this item by default.'))
	->addCancelButton($done_uri)
	->addSubmitButton(pht('Make Default'));
	}

	protected function newItem() {
	return PhabricatorProfileMenuItemConfiguration::initializeNewBuiltin();
	}

	protected function newManageItem() {
	return $this->newItem()
	->setBuiltinKey(self::ITEM_MANAGE)
	->setMenuItemKey(PhabricatorManageProfileMenuItem::MENUITEMKEY)
	->setIsTailItem(true);
	}

	protected function newDividerItem($key) {
	return $this->newItem()
	->setBuiltinKey($key)
	->setMenuItemKey(PhabricatorDividerProfileMenuItem::MENUITEMKEY)
	->setIsTailItem(true);
	}

	public function getDefaultMenuItemConfiguration() {
	$configs = $this->getItems();
	foreach ($configs as $config) {
	if ($config->isDefault()) {
	return $config;
	}
	}

	return null;
	}

	public function adjustDefault($key) {
	$controller = $this->getController();
	$request = $controller->getRequest();
	$viewer = $request->getViewer();

	$items = $this->loadItems(self::MODE_COMBINED);

	// To adjust the default item, we first change any existing items that
	// are marked as defaults to "visible", then make the new default item
	// the default.

	$default = array();
	$visible = array();

	foreach ($items as $item) {
	$builtin_key = $item->getBuiltinKey();
	$id = $item->getID();

	$is_target =
	(($builtin_key !== null) && ($builtin_key === $key)) \|\|
	(($id !== null) && ((int)$id === (int)$key));

	if ($is_target) {
	if (!$item->isDefault()) {
	$default[] = $item;
	}
	} else {
	if ($item->isDefault()) {
	$visible[] = $item;
	}
	}
	}

	$type_visibility =
	PhabricatorProfileMenuItemConfigurationTransaction::TYPE_VISIBILITY;

	$v_visible = PhabricatorProfileMenuItemConfiguration::VISIBILITY_VISIBLE;
	$v_default = PhabricatorProfileMenuItemConfiguration::VISIBILITY_DEFAULT;

	$apply = array(
	array($v_visible, $visible),
	array($v_default, $default),
	);

	foreach ($apply as $group) {
	list($value, $items) = $group;
	foreach ($items as $item) {
	$xactions = array();

	$xactions[] =
	id(new PhabricatorProfileMenuItemConfigurationTransaction())
	->setTransactionType($type_visibility)
	->setNewValue($value);

	$editor = id(new PhabricatorProfileMenuEditor())
	->setContentSourceFromRequest($request)
	->setActor($viewer)
	->setContinueOnMissingFields(true)
	->setContinueOnNoEffect(true)
	->applyTransactions($item, $xactions);
	}
	}

	return $this;
	}

	private function arrangeItems(array $items, $mode) {
	// Sort the items.
	$items = msortv($items, 'getSortVector');

	$object = $this->getProfileObject();

	// If we have some global items and some custom items and are in "combined"
	// mode, put a hard-coded divider item between them.
	if ($mode == self::MODE_COMBINED) {
	$list = array();
	$seen_custom = false;
	$seen_global = false;
	foreach ($items as $item) {
	if ($item->getCustomPHID()) {
	$seen_custom = true;
	} else {
	if ($seen_custom && !$seen_global) {
	$list[] = $this->newItem()
	->setBuiltinKey(self::ITEM_CUSTOM_DIVIDER)
	->setMenuItemKey(PhabricatorDividerProfileMenuItem::MENUITEMKEY)
	->attachProfileObject($object)
	->attachMenuItem(
	new PhabricatorDividerProfileMenuItem());
	}
	$seen_global = true;
	}
	$list[] = $item;
	}
	$items = $list;
	}

	// Normalize keys since callers shouldn't rely on this array being
	// partially keyed.
	$items = array_values($items);

	return $items;
	}

	final protected function newEmptyView($title, $message) {
	return id(new PHUIInfoView())
	->setTitle($title)
	->setSeverity(PHUIInfoView::SEVERITY_NODATA)
	->setErrors(
	array(
	$message,
	));
	}

	protected function newNoContentView(array $items) {
	return $this->newEmptyView(
	pht('No Content'),
	pht('No visible menu items can render content.'));
	}


	final public function newProfileMenuItemViewList() {
	$items = $this->getItems();

	// Throw away disabled items: they are not allowed to build any views for
	// the menu.
	foreach ($items as $key => $item) {
	if ($item->isDisabled()) {
	unset($items[$key]);
	continue;
	}
	}

	// Give each item group a callback so it can load data it needs to render
	// views.
	$groups = mgroup($items, 'getMenuItemKey');
	foreach ($groups as $group) {
	$item = head($group);
	$item->willGetMenuItemViewList($group);
	}

	$view_list = id(new PhabricatorProfileMenuItemViewList())
	->setProfileMenuEngine($this);

	foreach ($items as $item) {
	$views = $item->getMenuItemViewList();
	foreach ($views as $view) {
	$view_list->addItemView($view);
	}
	}

	return $view_list;
	}

	private function selectViewItem(
	PhabricatorProfileMenuItemViewList $view_list,
	$item_id) {

	// Figure out which view's content we're going to render. In most cases,
	// the URI tells us. If we don't have an identifier in the URI, we'll
	// render the default view instead.

	$selected_view = null;
	if (phutil_nonempty_string($item_id)) {
	$item_views = $view_list->getViewsWithItemIdentifier($item_id);
	if ($item_views) {
	$selected_view = head($item_views);
	}
	} else {
	$default_views = $view_list->getDefaultViews();
	if ($default_views) {
	$selected_view = head($default_views);
	}
	}

	if ($selected_view) {
	$view_list->setSelectedView($selected_view);
	$selected_item = $selected_view->getMenuItemConfiguration();
	} else {
	$selected_item = null;
	}

	return $selected_item;
	}

	private function selectEditItem(
	PhabricatorProfileMenuItemViewList $view_list,
	$item_id) {

	// First, try to select a visible item using the normal view selection
	// pathway. If this works, it also highlights the menu properly.

	if ($item_id) {
	$selected_item = $this->selectViewItem($view_list, $item_id);
	if ($selected_item) {
	return $selected_item;
	}
	}

	// If we didn't find an item in the view list, we may be enabling an item
	// which is currently disabled or editing an item which is not generating
	// any actual items in the menu.

	foreach ($this->getItems() as $item) {
	if ($item->matchesIdentifier($item_id)) {
	return $item;
	}
	}

	return null;
	}


	}

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