D14393.id34774.diff
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	diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
	--- a/src/__phutil_library_map__.php
	+++ b/src/__phutil_library_map__.php
	@@ -1530,6 +1530,7 @@
	'PasteCreateMailReceiver' => 'applications/paste/mail/PasteCreateMailReceiver.php',
	'PasteDefaultEditCapability' => 'applications/paste/capability/PasteDefaultEditCapability.php',
	'PasteDefaultViewCapability' => 'applications/paste/capability/PasteDefaultViewCapability.php',
	+ 'PasteEditConduitAPIMethod' => 'applications/paste/conduit/PasteEditConduitAPIMethod.php',
	'PasteEmbedView' => 'applications/paste/view/PasteEmbedView.php',
	'PasteInfoConduitAPIMethod' => 'applications/paste/conduit/PasteInfoConduitAPIMethod.php',
	'PasteMailReceiver' => 'applications/paste/mail/PasteMailReceiver.php',
	@@ -1571,6 +1572,7 @@
	'PhabricatorApplicationDetailViewController' => 'applications/meta/controller/PhabricatorApplicationDetailViewController.php',
	'PhabricatorApplicationEditController' => 'applications/meta/controller/PhabricatorApplicationEditController.php',
	'PhabricatorApplicationEditEngine' => 'applications/transactions/editengine/PhabricatorApplicationEditEngine.php',
	+ 'PhabricatorApplicationEditEngineAPIMethod' => 'applications/transactions/editengine/PhabricatorApplicationEditEngineAPIMethod.php',
	'PhabricatorApplicationEditHTTPParameterHelpView' => 'applications/transactions/view/PhabricatorApplicationEditHTTPParameterHelpView.php',
	'PhabricatorApplicationEmailCommandsController' => 'applications/meta/controller/PhabricatorApplicationEmailCommandsController.php',
	'PhabricatorApplicationLaunchView' => 'applications/meta/view/PhabricatorApplicationLaunchView.php',
	@@ -2094,6 +2096,7 @@
	'PhabricatorEdgeConfig' => 'infrastructure/edges/constants/PhabricatorEdgeConfig.php',
	'PhabricatorEdgeConstants' => 'infrastructure/edges/constants/PhabricatorEdgeConstants.php',
	'PhabricatorEdgeCycleException' => 'infrastructure/edges/exception/PhabricatorEdgeCycleException.php',
	+ 'PhabricatorEdgeEditType' => 'applications/transactions/edittype/PhabricatorEdgeEditType.php',
	'PhabricatorEdgeEditor' => 'infrastructure/edges/editor/PhabricatorEdgeEditor.php',
	'PhabricatorEdgeGraph' => 'infrastructure/edges/util/PhabricatorEdgeGraph.php',
	'PhabricatorEdgeQuery' => 'infrastructure/edges/query/PhabricatorEdgeQuery.php',
	@@ -2101,6 +2104,7 @@
	'PhabricatorEdgeType' => 'infrastructure/edges/type/PhabricatorEdgeType.php',
	'PhabricatorEdgeTypeTestCase' => 'infrastructure/edges/type/__tests__/PhabricatorEdgeTypeTestCase.php',
	'PhabricatorEditField' => 'applications/transactions/editfield/PhabricatorEditField.php',
	+ 'PhabricatorEditType' => 'applications/transactions/edittype/PhabricatorEditType.php',
	'PhabricatorEditor' => 'infrastructure/PhabricatorEditor.php',
	'PhabricatorElasticSearchEngine' => 'applications/search/engine/PhabricatorElasticSearchEngine.php',
	'PhabricatorElasticSearchSetupCheck' => 'applications/config/check/PhabricatorElasticSearchSetupCheck.php',
	@@ -2936,6 +2940,7 @@
	'PhabricatorSetupIssue' => 'applications/config/issue/PhabricatorSetupIssue.php',
	'PhabricatorSetupIssueUIExample' => 'applications/uiexample/examples/PhabricatorSetupIssueUIExample.php',
	'PhabricatorSetupIssueView' => 'applications/config/view/PhabricatorSetupIssueView.php',
	+ 'PhabricatorSimpleEditType' => 'applications/transactions/edittype/PhabricatorSimpleEditType.php',
	'PhabricatorSite' => 'aphront/site/PhabricatorSite.php',
	'PhabricatorSlowvoteApplication' => 'applications/slowvote/application/PhabricatorSlowvoteApplication.php',
	'PhabricatorSlowvoteChoice' => 'applications/slowvote/storage/PhabricatorSlowvoteChoice.php',
	@@ -5457,6 +5462,7 @@
	'PasteCreateMailReceiver' => 'PhabricatorMailReceiver',
	'PasteDefaultEditCapability' => 'PhabricatorPolicyCapability',
	'PasteDefaultViewCapability' => 'PhabricatorPolicyCapability',
	+ 'PasteEditConduitAPIMethod' => 'PhabricatorApplicationEditEngineAPIMethod',
	'PasteEmbedView' => 'AphrontView',
	'PasteInfoConduitAPIMethod' => 'PasteConduitAPIMethod',
	'PasteMailReceiver' => 'PhabricatorObjectMailReceiver',
	@@ -5501,6 +5507,7 @@
	'PhabricatorApplicationDetailViewController' => 'PhabricatorApplicationsController',
	'PhabricatorApplicationEditController' => 'PhabricatorApplicationsController',
	'PhabricatorApplicationEditEngine' => 'Phobject',
	+ 'PhabricatorApplicationEditEngineAPIMethod' => 'ConduitAPIMethod',
	'PhabricatorApplicationEditHTTPParameterHelpView' => 'AphrontView',
	'PhabricatorApplicationEmailCommandsController' => 'PhabricatorApplicationsController',
	'PhabricatorApplicationLaunchView' => 'AphrontTagView',
	@@ -6121,6 +6128,7 @@
	'PhabricatorEdgeConfig' => 'PhabricatorEdgeConstants',
	'PhabricatorEdgeConstants' => 'Phobject',
	'PhabricatorEdgeCycleException' => 'Exception',
	+ 'PhabricatorEdgeEditType' => 'PhabricatorEditType',
	'PhabricatorEdgeEditor' => 'Phobject',
	'PhabricatorEdgeGraph' => 'AbstractDirectedGraph',
	'PhabricatorEdgeQuery' => 'PhabricatorQuery',
	@@ -6128,6 +6136,7 @@
	'PhabricatorEdgeType' => 'Phobject',
	'PhabricatorEdgeTypeTestCase' => 'PhabricatorTestCase',
	'PhabricatorEditField' => 'Phobject',
	+ 'PhabricatorEditType' => 'Phobject',
	'PhabricatorEditor' => 'Phobject',
	'PhabricatorElasticSearchEngine' => 'PhabricatorSearchEngine',
	'PhabricatorElasticSearchSetupCheck' => 'PhabricatorSetupCheck',
	@@ -7120,6 +7129,7 @@
	'PhabricatorSetupIssue' => 'Phobject',
	'PhabricatorSetupIssueUIExample' => 'PhabricatorUIExample',
	'PhabricatorSetupIssueView' => 'AphrontView',
	+ 'PhabricatorSimpleEditType' => 'PhabricatorEditType',
	'PhabricatorSite' => 'AphrontSite',
	'PhabricatorSlowvoteApplication' => 'PhabricatorApplication',
	'PhabricatorSlowvoteChoice' => 'PhabricatorSlowvoteDAO',
	diff --git a/src/applications/paste/conduit/PasteEditConduitAPIMethod.php b/src/applications/paste/conduit/PasteEditConduitAPIMethod.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/paste/conduit/PasteEditConduitAPIMethod.php
	@@ -0,0 +1,19 @@
	+<?php
	+
	+final class PasteEditConduitAPIMethod
	+ extends PhabricatorApplicationEditEngineAPIMethod {
	+
	+ public function getAPIMethodName() {
	+ return 'paste.edit';
	+ }
	+
	+ public function newEditEngine() {
	+ return new PhabricatorPasteEditEngine();
	+ }
	+
	+ public function getMethodSummary() {
	+ return pht(
	+ 'Apply transactions to create a new paste or edit an existing one.');
	+ }
	+
	+}
	diff --git a/src/applications/paste/editor/PhabricatorPasteEditor.php b/src/applications/paste/editor/PhabricatorPasteEditor.php
	--- a/src/applications/paste/editor/PhabricatorPasteEditor.php
	+++ b/src/applications/paste/editor/PhabricatorPasteEditor.php
	@@ -72,6 +72,30 @@
	$this->fileName = $name;
	}

	+ protected function validateTransaction(
	+ PhabricatorLiskDAO $object,
	+ $type,
	+ array $xactions) {
	+
	+ $errors = parent::validateTransaction($object, $type, $xactions);
	+ switch ($type) {
	+ case PhabricatorPasteTransaction::TYPE_CONTENT:
	+ if (!$object->getFilePHID() && !$xactions) {
	+ $error = new PhabricatorApplicationTransactionValidationError(
	+ $type,
	+ pht('Required'),
	+ pht('You must provide content to create a paste.'),
	+ null);
	+
	+ $error->setIsMissingFieldError(true);
	+ $errors[] = $error;
	+ }
	+ break;
	+ }
	+
	+ return $errors;
	+ }
	+
	protected function getCustomTransactionOldValue(
	PhabricatorLiskDAO $object,
	PhabricatorApplicationTransaction $xaction) {
	diff --git a/src/applications/paste/storage/PhabricatorPaste.php b/src/applications/paste/storage/PhabricatorPaste.php
	--- a/src/applications/paste/storage/PhabricatorPaste.php
	+++ b/src/applications/paste/storage/PhabricatorPaste.php
	@@ -41,6 +41,7 @@

	return id(new PhabricatorPaste())
	->setTitle('')
	+ ->setLanguage('')
	->setStatus(self::STATUS_ACTIVE)
	->setAuthorPHID($actor->getPHID())
	->setViewPolicy($view_policy)
	diff --git a/src/applications/transactions/editengine/PhabricatorApplicationEditEngine.php b/src/applications/transactions/editengine/PhabricatorApplicationEditEngine.php
	--- a/src/applications/transactions/editengine/PhabricatorApplicationEditEngine.php
	+++ b/src/applications/transactions/editengine/PhabricatorApplicationEditEngine.php
	@@ -1,5 +1,10 @@
	<?php

	+
	+/**
	+ * @task web Responding to Web Requests
	+ * @task conduit Responding to Conduit Requests
	+ */
	abstract class PhabricatorApplicationEditEngine extends Phobject {

	private $viewer;
	@@ -47,6 +52,7 @@
	'capability' => PhabricatorPolicyCapability::CAN_VIEW,
	'label' => pht('View Policy'),
	'description' => pht('Controls who can view the object.'),
	+ 'edit' => 'view',
	),
	PhabricatorTransactions::TYPE_EDIT_POLICY => array(
	'key' => 'policy.edit',
	@@ -54,6 +60,7 @@
	'capability' => PhabricatorPolicyCapability::CAN_EDIT,
	'label' => pht('Edit Policy'),
	'description' => pht('Controls who can edit the object.'),
	+ 'edit' => 'edit',
	),
	PhabricatorTransactions::TYPE_JOIN_POLICY => array(
	'key' => 'policy.join',
	@@ -61,6 +68,7 @@
	'capability' => PhabricatorPolicyCapability::CAN_JOIN,
	'label' => pht('Join Policy'),
	'description' => pht('Controls who can join the object.'),
	+ 'edit' => 'join',
	),
	);

	@@ -74,6 +82,7 @@
	$aliases = $spec['aliases'];
	$label = $spec['label'];
	$description = $spec['description'];
	+ $edit = $spec['edit'];

	$policy_field = id(new PhabricatorPolicyEditField())
	->setKey($key)
	@@ -83,6 +92,7 @@
	->setCapability($capability)
	->setPolicies($policies)
	->setTransactionType($type)
	+ ->setEditTypeKey($edit)
	->setValue($object->getPolicy($capability));
	$fields[] = $policy_field;

	@@ -93,6 +103,7 @@
	$space_field = id(new PhabricatorSpaceEditField())
	->setKey('spacePHID')
	->setLabel(pht('Space'))
	+ ->setEditTypeKey('space')
	->setDescription(
	pht('Shifts the object in the Spaces application.'))
	->setAliases(array('space', 'policy.space'))
	@@ -126,6 +137,7 @@
	$edge_field = id(new PhabricatorDatasourceEditField())
	->setKey('projectPHIDs')
	->setLabel(pht('Projects'))
	+ ->setEditTypeKey('projects')
	->setDescription(
	pht(
	'Add or remove associated projects.'))
	@@ -154,6 +166,7 @@
	$subscribers_field = id(new PhabricatorDatasourceEditField())
	->setKey('subscriberPHIDs')
	->setLabel(pht('Subscribers'))
	+ ->setEditTypeKey('subscribers')
	->setDescription(pht('Manage subscribers.'))
	->setDatasource(new PhabricatorMetaMTAMailableDatasource())
	->setAliases(array('subscriber', 'subscribers'))
	@@ -240,11 +253,9 @@
	if (!$object) {
	return new Aphront404Response();
	}
	-
	$this->setIsCreate(false);
	} else {
	$object = $this->newEditableObject();
	-
	$this->setIsCreate(true);
	}

	@@ -443,4 +454,171 @@
	return $actions;
	}

	+
	+/* -( Conduit )------------------------------------------------------------ */
	+
	+
	+ /**
	+ * Respond to a Conduit edit request.
	+ *
	+ * This method accepts a list of transactions to apply to an object, and
	+ * either edits an existing object or creates a new one.
	+ *
	+ * @task conduit
	+ */
	+ final public function buildConduitResponse(ConduitAPIRequest $request) {
	+ $viewer = $this->getViewer();
	+
	+ $phid = $request->getValue('objectPHID');
	+ if ($phid) {
	+ $object = $this->newObjectQuery()
	+ ->setViewer($viewer)
	+ ->withPHIDs(array($phid))
	+ ->requireCapabilities(
	+ array(
	+ PhabricatorPolicyCapability::CAN_VIEW,
	+ PhabricatorPolicyCapability::CAN_EDIT,
	+ ))
	+ ->executeOne();
	+ if (!$object) {
	+ throw new Exception(pht('No such object with PHID "%s".', $phid));
	+ }
	+ $this->setIsCreate(false);
	+ } else {
	+ $object = $this->newEditableObject();
	+ $this->setIsCreate(true);
	+ }
	+
	+ $fields = $this->buildEditFields($object);
	+
	+ foreach ($fields as $field) {
	+ $field
	+ ->setViewer($viewer)
	+ ->setObject($object);
	+ }
	+
	+ $types = $this->getAllEditTypesFromFields($fields);
	+ $template = $object->getApplicationTransactionTemplate();
	+
	+ $xactions = $this->getConduitTransactions($request, $types, $template);
	+
	+ $editor = $object->getApplicationTransactionEditor()
	+ ->setActor($viewer)
	+ ->setContentSourceFromConduitRequest($request)
	+ ->setContinueOnNoEffect(true);
	+
	+ $xactions = $editor->applyTransactions($object, $xactions);
	+
	+ $xactions_struct = array();
	+ foreach ($xactions as $xaction) {
	+ $xactions_struct[] = array(
	+ 'phid' => $xaction->getPHID(),
	+ );
	+ }
	+
	+ return array(
	+ 'object' => array(
	+ 'id' => $object->getID(),
	+ 'phid' => $object->getPHID(),
	+ ),
	+ 'transactions' => $xactions_struct,
	+ );
	+ }
	+
	+
	+ /**
	+ * Generate transactions which can be applied from edit actions in a Conduit
	+ * request.
	+ *
	+ * @param ConduitAPIRequest The request.
	+ * @param list<PhabricatorEditType> Supported edit types.
	+ * @param PhabricatorApplicationTransaction Template transaction.
	+ * @return list<PhabricatorApplicationTransaction> Generated transactions.
	+ * @task conduit
	+ */
	+ private function getConduitTransactions(
	+ ConduitAPIRequest $request,
	+ array $types,
	+ PhabricatorApplicationTransaction $template) {
	+
	+ $transactions_key = 'transactions';
	+
	+ $xactions = $request->getValue($transactions_key);
	+ if (!is_array($xactions)) {
	+ throw new Exception(
	+ pht(
	+ 'Parameter "%s" is not a list of transactions.',
	+ $transactions_key));
	+ }
	+
	+ foreach ($xactions as $key => $xaction) {
	+ if (!is_array($xaction)) {
	+ throw new Exception(
	+ pht(
	+ 'Parameter "%s" must contain a list of transaction descriptions, '.
	+ 'but item with key "%s" is not a dictionary.',
	+ $transactions_key,
	+ $key));
	+ }
	+
	+ if (!array_key_exists('type', $xaction)) {
	+ throw new Exception(
	+ pht(
	+ 'Parameter "%s" must contain a list of transaction descriptions, '.
	+ 'but item with key "%s" is missing a "type" field. Each '.
	+ 'transaction must have a type field.',
	+ $transactions_key,
	+ $key));
	+ }
	+
	+ $type = $xaction['type'];
	+ if (empty($types[$type])) {
	+ throw new Exception(
	+ pht(
	+ 'Transaction with key "%s" has invalid type "%s". This type is '.
	+ 'not recognized. Valid types are: %s.',
	+ $key,
	+ $type,
	+ implode(', ', array_keys($types))));
	+ }
	+ }
	+
	+ $results = array();
	+ foreach ($xactions as $xaction) {
	+ $type = $types[$xaction['type']];
	+
	+ $results[] = $type->generateTransaction(
	+ clone $template,
	+ $xaction);
	+ }
	+
	+ return $results;
	+ }
	+
	+
	+ /**
	+ * @return map<string, PhabricatorEditType>
	+ * @task conduit
	+ */
	+ private function getAllEditTypesFromFields(array $fields) {
	+ $types = array();
	+ foreach ($fields as $field) {
	+ $field_types = $field->getEditTransactionTypes();
	+ foreach ($field_types as $field_type) {
	+ $field_type->setField($field);
	+ $types[$field_type->getEditType()] = $field_type;
	+ }
	+ }
	+ return $types;
	+ }
	+
	+ public function getAllEditTypes() {
	+ $object = $this->newEditableObject();
	+ $fields = $this->buildEditFields($object);
	+ return $this->getAllEditTypesFromFields($fields);
	+ }
	+
	+
	+
	+
	}
	diff --git a/src/applications/transactions/editengine/PhabricatorApplicationEditEngineAPIMethod.php b/src/applications/transactions/editengine/PhabricatorApplicationEditEngineAPIMethod.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/editengine/PhabricatorApplicationEditEngineAPIMethod.php
	@@ -0,0 +1,188 @@
	+<?php
	+
	+abstract class PhabricatorApplicationEditEngineAPIMethod
	+ extends ConduitAPIMethod {
	+
	+ abstract public function newEditEngine();
	+
	+ public function getMethodStatus() {
	+ return self::METHOD_STATUS_UNSTABLE;
	+ }
	+
	+ public function getMethodStatusDescription() {
	+ return pht('ApplicationEditor methods are highly unstable.');
	+ }
	+
	+ final protected function defineParamTypes() {
	+ return array(
	+ 'transactions' => 'list<map<string, wild>>',
	+ 'objectPHID' => 'optional phid',
	+ );
	+ }
	+
	+ final protected function defineReturnType() {
	+ return 'map<string, wild>';
	+ }
	+
	+ final protected function execute(ConduitAPIRequest $request) {
	+ $engine = $this->newEditEngine()
	+ ->setViewer($request->getUser());
	+
	+ return $engine->buildConduitResponse($request);
	+ }
	+
	+ final public function getMethodDescription() {
	+ // TODO: We don't currently have a real viewer in this method.
	+ $viewer = new PhabricatorUser();
	+
	+ $engine = $this->newEditEngine()
	+ ->setViewer($viewer);
	+
	+ $types = $engine->getAllEditTypes();
	+
	+ $out = array();
	+
	+ $out[] = pht(<<<EOTEXT
	+This is a standard ApplicationEditor method which allows you to create and
	+modify objects by applying transactions.
	+
	+Each transaction applies one change to the object. For example, to create an
	+object with a specific title or change the title of an existing object you might
	+start by building a transaction like this:
	+
	+```lang=json, name=Example Single Transaction
	+{
	+ "type": "title",
	+ "value": "New Object Title"
	+}
	+```
	+
	+By passing a list of transactions in the `transactions` parameter, you can
	+apply a sequence of edits. For example, you'll often pass a value like this to
	+create an object with several field values or apply changes to multiple fields:
	+
	+```lang=json, name=Example Transaction List
	+[
	+ {
	+ "type": "title",
	+ "value": "New Object Title"
	+ },
	+ {
	+ "type": "body",
	+ "value": "New body text for the object."
	+ },
	+ {
	+ "type": "projects.add",
	+ "value": ["PHID-PROJ-1111", "PHID-PROJ-2222"]
	+ }
	+]
	+```
	+
	+Exactly which types of edits are available depends on the object you're editing.
	+
	+
	+Creating Objects
	+----------------
	+
	+To create an object, pass a list of `transactions` but leave `objectPHID`
	+empty. This will create a new object with the initial field values you
	+specify.
	+
	+
	+Editing Objects
	+---------------
	+
	+To edit an object, pass a list of `transactions` and specify an object to
	+apply them to with `objectPHID`. This will apply the changes to the object.
	+
	+
	+Return Type
	+-----------
	+
	+WARNING: The structure of the return value from these methods is likely to
	+change as ApplicationEditor evolves.
	+
	+Return values look something like this for now:
	+
	+```lang=json, name=Example Return Value
	+{
	+ "object": {
	+ "phid": "PHID-XXXX-1111"
	+ },
	+ "transactions": [
	+ {
	+ "phid": "PHID-YYYY-1111",
	+ },
	+ {
	+ "phid": "PHID-YYYY-2222",
	+ }
	+ ]
	+}
	+```
	+
	+The `object` key contains information about the object which was created or
	+edited.
	+
	+The `transactions` key contains information about the transactions which were
	+actually applied. For many reasons, the transactions which actually apply may
	+be greater or fewer in number than the transactions you provided, or may differ
	+in their nature in other ways.
	+
	+
	+Edit Types
	+==========
	+
	+This API method supports these edit types:
	+EOTEXT
	+ );
	+
	+ $key = pht('Key');
	+ $summary = pht('Summary');
	+ $description = pht('Description');
	+ $head_type = pht('Type');
	+
	+ $table = array();
	+ $table[] = "\| {$key} \| {$summary} \|";
	+ $table[] = '\|--------\|----------------\|';
	+ foreach ($types as $type) {
	+ $edit_type = $type->getEditType();
	+ $edit_summary = $type->getSummary();
	+ $table[] = "\| `{$edit_type}` \| {$edit_summary} \|";
	+ }
	+
	+ $out[] = implode("\n", $table);
	+
	+ foreach ($types as $type) {
	+ $section = array();
	+ $section[] = pht('Edit Type: %s', $type->getEditType());
	+ $section[] = '---------';
	+ $section[] = null;
	+ $section[] = $type->getDescription();
	+ $section[] = null;
	+ $section[] = pht(
	+ 'This edit generates transactions of type `%s` internally.',
	+ $type->getTransactionType());
	+ $section[] = null;
	+
	+ $type_description = pht(
	+ 'Use `%s` to select this edit type.',
	+ $type->getEditType());
	+
	+ $value_type = $type->getValueType();
	+ $value_description = $type->getValueDescription();
	+
	+ $table = array();
	+ $table[] = "\| {$key} \| {$head_type} \| {$description} \|";
	+ $table[] = '\|--------\|--------------\|----------------\|';
	+ $table[] = "\| `type` \| `const` \| {$type_description} \|";
	+ $table[] = "\| `value` \| `{$value_type}` \| {$value_description} \|";
	+ $section[] = implode("\n", $table);
	+
	+ $out[] = implode("\n", $section);
	+ }
	+
	+ $out = implode("\n\n", $out);
	+ return $out;
	+ }
	+
	+}
	diff --git a/src/applications/transactions/editfield/PhabricatorEditField.php b/src/applications/transactions/editfield/PhabricatorEditField.php
	--- a/src/applications/transactions/editfield/PhabricatorEditField.php
	+++ b/src/applications/transactions/editfield/PhabricatorEditField.php
	@@ -12,6 +12,8 @@
	private $transactionType;
	private $metadata = array();
	private $description;
	+ private $editTypeKey;
	+

	public function setKey($key) {
	$this->key = $key;
	@@ -223,4 +225,75 @@
	return 'string';
	}

	+ public function setEditTypeKey($edit_type_key) {
	+ $this->editTypeKey = $edit_type_key;
	+ return $this;
	+ }
	+
	+ public function getEditTypeKey() {
	+ if ($this->editTypeKey === null) {
	+ return $this->getKey();
	+ }
	+ return $this->editTypeKey;
	+ }
	+
	+ public function getEditTransactionTypes() {
	+ $transaction_type = $this->getTransactionType();
	+ $type_key = $this->getEditTypeKey();
	+
	+ // TODO: This is a pretty big pile of hard-coded hacks for now.
	+
	+ $edge_types = array(
	+ PhabricatorTransactions::TYPE_EDGE => array(
	+ '+' => pht('Add projects.'),
	+ '-' => pht('Remove projects.'),
	+ '=' => pht('Set associated projects, overwriting current value.'),
	+ ),
	+ PhabricatorTransactions::TYPE_SUBSCRIBERS => array(
	+ '+' => pht('Add subscribers.'),
	+ '-' => pht('Remove subscribers.'),
	+ '=' => pht('Set subscribers, overwriting current value.'),
	+ ),
	+ );
	+
	+ if (isset($edge_types[$transaction_type])) {
	+ $base = id(new PhabricatorEdgeEditType())
	+ ->setTransactionType($transaction_type)
	+ ->setMetadata($this->metadata);
	+
	+ $strings = $edge_types[$transaction_type];
	+
	+ $add = id(clone $base)
	+ ->setEditType($type_key.'.add')
	+ ->setEdgeOperation('+')
	+ ->setDescription($strings['+'])
	+ ->setValueDescription(pht('List of PHIDs to add.'));
	+ $rem = id(clone $base)
	+ ->setEditType($type_key.'.remove')
	+ ->setEdgeOperation('-')
	+ ->setDescription($strings['-'])
	+ ->setValueDescription(pht('List of PHIDs to remove.'));
	+ $set = id(clone $base)
	+ ->setEditType($type_key.'.set')
	+ ->setEdgeOperation('=')
	+ ->setDescription($strings['='])
	+ ->setValueDescription(pht('List of PHIDs to set.'));
	+
	+ return array(
	+ $add,
	+ $rem,
	+ $set,
	+ );
	+ }
	+
	+ return array(
	+ id(new PhabricatorSimpleEditType())
	+ ->setEditType($type_key)
	+ ->setTransactionType($transaction_type)
	+ ->setValueType($this->getHTTPParameterType())
	+ ->setDescription($this->getDescription())
	+ ->setMetadata($this->metadata),
	+ );
	+ }
	+
	}
	diff --git a/src/applications/transactions/edittype/PhabricatorEdgeEditType.php b/src/applications/transactions/edittype/PhabricatorEdgeEditType.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/edittype/PhabricatorEdgeEditType.php
	@@ -0,0 +1,51 @@
	+<?php
	+
	+final class PhabricatorEdgeEditType extends PhabricatorEditType {
	+
	+ private $edgeOperation;
	+ private $valueDescription;
	+
	+ public function setEdgeOperation($edge_operation) {
	+ $this->edgeOperation = $edge_operation;
	+ return $this;
	+ }
	+
	+ public function getEdgeOperation() {
	+ return $this->edgeOperation;
	+ }
	+
	+ public function getValueType() {
	+ return 'list<phid>';
	+ }
	+
	+ public function generateTransaction(
	+ PhabricatorApplicationTransaction $template,
	+ array $spec) {
	+
	+ $value = idx($spec, 'value');
	+ $value = array_fuse($value);
	+ $value = array(
	+ $this->getEdgeOperation() => $value,
	+ );
	+
	+ $template
	+ ->setTransactionType($this->getTransactionType())
	+ ->setNewValue($value);
	+
	+ foreach ($this->getMetadata() as $key => $value) {
	+ $template->setMetadataValue($key, $value);
	+ }
	+
	+ return $template;
	+ }
	+
	+ public function setValueDescription($value_description) {
	+ $this->valueDescription = $value_description;
	+ return $this;
	+ }
	+
	+ public function getValueDescription() {
	+ return $this->valueDescription;
	+ }
	+
	+}
	diff --git a/src/applications/transactions/edittype/PhabricatorEditType.php b/src/applications/transactions/edittype/PhabricatorEditType.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/edittype/PhabricatorEditType.php
	@@ -0,0 +1,76 @@
	+<?php
	+
	+abstract class PhabricatorEditType extends Phobject {
	+
	+ private $editType;
	+ private $transactionType;
	+ private $field;
	+ private $description;
	+ private $summary;
	+ private $metadata = array();
	+
	+ public function setDescription($description) {
	+ $this->description = $description;
	+ return $this;
	+ }
	+
	+ public function getDescription() {
	+ return $this->description;
	+ }
	+
	+ public function setSummary($summary) {
	+ $this->summary = $summary;
	+ return $this;
	+ }
	+
	+ public function getSummary() {
	+ if ($this->summary === null) {
	+ return $this->getDescription();
	+ }
	+ return $this->summary;
	+ }
	+
	+ public function setField(PhabricatorEditField $field) {
	+ $this->field = $field;
	+ return $this;
	+ }
	+
	+ public function getField() {
	+ return $this->field;
	+ }
	+
	+ public function setEditType($edit_type) {
	+ $this->editType = $edit_type;
	+ return $this;
	+ }
	+
	+ public function getEditType() {
	+ return $this->editType;
	+ }
	+
	+ public function setMetadata($metadata) {
	+ $this->metadata = $metadata;
	+ return $this;
	+ }
	+
	+ public function getMetadata() {
	+ return $this->metadata;
	+ }
	+
	+ public function setTransactionType($transaction_type) {
	+ $this->transactionType = $transaction_type;
	+ return $this;
	+ }
	+
	+ public function getTransactionType() {
	+ return $this->transactionType;
	+ }
	+
	+ abstract public function generateTransaction(
	+ PhabricatorApplicationTransaction $template,
	+ array $spec);
	+
	+ abstract public function getValueType();
	+ abstract public function getValueDescription();
	+
	+}
	diff --git a/src/applications/transactions/edittype/PhabricatorSimpleEditType.php b/src/applications/transactions/edittype/PhabricatorSimpleEditType.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/edittype/PhabricatorSimpleEditType.php
	@@ -0,0 +1,41 @@
	+<?php
	+
	+final class PhabricatorSimpleEditType extends PhabricatorEditType {
	+
	+ private $valueType;
	+ private $valueDescription;
	+
	+ public function setValueType($value_type) {
	+ $this->valueType = $value_type;
	+ return $this;
	+ }
	+
	+ public function getValueType() {
	+ return $this->valueType;
	+ }
	+
	+ public function generateTransaction(
	+ PhabricatorApplicationTransaction $template,
	+ array $spec) {
	+
	+ $template
	+ ->setTransactionType($this->getTransactionType())
	+ ->setNewValue(idx($spec, 'value'));
	+
	+ foreach ($this->getMetadata() as $key => $value) {
	+ $template->setMetadataValue($key, $value);
	+ }
	+
	+ return $template;
	+ }
	+
	+ public function setValueDescription($value_description) {
	+ $this->valueDescription = $value_description;
	+ return $this;
	+ }
	+
	+ public function getValueDescription() {
	+ return $this->valueDescription;
	+ }
	+
	+}

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