<?php

final class PhabricatorProjectTriggerEditController
  extends PhabricatorProjectTriggerController {

  public function handleRequest(AphrontRequest $request) {
    $request = $this->getRequest();
    $viewer = $request->getViewer();

    $id = $request->getURIData('id');
    if ($id) {
      $trigger = id(new PhabricatorProjectTriggerQuery())
        ->setViewer($viewer)
        ->withIDs(array($id))
        ->requireCapabilities(
          array(
            PhabricatorPolicyCapability::CAN_VIEW,
            PhabricatorPolicyCapability::CAN_EDIT,
          ))
        ->executeOne();
      if (!$trigger) {
        return new Aphront404Response();
      }
    } else {
      $trigger = PhabricatorProjectTrigger::initializeNewTrigger();
    }

    $column_phid = $request->getStr('columnPHID');
    if ($column_phid) {
      $column = id(new PhabricatorProjectColumnQuery())
        ->setViewer($viewer)
        ->withPHIDs(array($column_phid))
        ->requireCapabilities(
          array(
            PhabricatorPolicyCapability::CAN_VIEW,
            PhabricatorPolicyCapability::CAN_EDIT,
          ))
        ->executeOne();
      if (!$column) {
        return new Aphront404Response();
      }
      $board_uri = $column->getBoardURI();
    } else {
      $column = null;
      $board_uri = null;
    }

    if ($board_uri) {
      $cancel_uri = $board_uri;
    } else if ($trigger->getID()) {
      $cancel_uri = $trigger->getURI();
    } else {
      $cancel_uri = $this->getApplicationURI('trigger/');
    }

    $v_name = $trigger->getName();
    $v_edit = $trigger->getEditPolicy();

    $e_name = null;
    $e_edit = null;

    $validation_exception = null;
    if ($request->isFormPost()) {
      try {
        $v_name = $request->getStr('name');
        $v_edit = $request->getStr('editPolicy');

        $xactions = array();
        if (!$trigger->getID()) {
          $xactions[] = $trigger->getApplicationTransactionTemplate()
            ->setTransactionType(PhabricatorTransactions::TYPE_CREATE)
            ->setNewValue(true);
        }

        $xactions[] = $trigger->getApplicationTransactionTemplate()
          ->setTransactionType(
            PhabricatorProjectTriggerNameTransaction::TRANSACTIONTYPE)
          ->setNewValue($v_name);

        $xactions[] = $trigger->getApplicationTransactionTemplate()
          ->setTransactionType(PhabricatorTransactions::TYPE_EDIT_POLICY)
          ->setNewValue($v_edit);

        $editor = $trigger->getApplicationTransactionEditor()
          ->setActor($viewer)
          ->setContentSourceFromRequest($request)
          ->setContinueOnNoEffect(true);

        $editor->applyTransactions($trigger, $xactions);

        $next_uri = $trigger->getURI();

        if ($column) {
          $column_xactions = array();

          // TODO: Modularize column transactions so we can change the column
          // trigger here. For now, this does nothing.

          $column_editor = $column->getApplicationTransactionEditor()
            ->setActor($viewer)
            ->setContentSourceFromRequest($request)
            ->setContinueOnNoEffect(true);

          $column_editor->applyTransactions($column, $column_xactions);

          $next_uri = $column->getBoardURI();
        }

        return id(new AphrontRedirectResponse())->setURI($next_uri);
      } catch (PhabricatorApplicationTransactionValidationException $ex) {
        $validation_exception = $ex;

        $e_name = $ex->getShortMessage(
          PhabricatorProjectTriggerNameTransaction::TRANSACTIONTYPE);

        $e_edit = $ex->getShortMessage(
          PhabricatorTransactions::TYPE_EDIT_POLICY);

        $trigger->setEditPolicy($v_edit);
      }
    }

    if ($trigger->getID()) {
      $title = $trigger->getObjectName();
      $submit = pht('Save Trigger');
      $header = pht('Edit Trigger: %s', $trigger->getObjectName());
    } else {
      $title = pht('New Trigger');
      $submit = pht('Create Trigger');
      $header = pht('New Trigger');
    }

    $form = id(new AphrontFormView())
      ->setViewer($viewer);

    if ($column) {
      $form->addHiddenInput('columnPHID', $column->getPHID());
    }

    $form->appendControl(
      id(new AphrontFormTextControl())
        ->setLabel(pht('Name'))
        ->setName('name')
        ->setValue($v_name)
        ->setError($e_name)
        ->setPlaceholder($trigger->getDefaultName()));

    $policies = id(new PhabricatorPolicyQuery())
      ->setViewer($viewer)
      ->setObject($trigger)
      ->execute();

    $form->appendControl(
      id(new AphrontFormPolicyControl())
        ->setName('editPolicy')
        ->setPolicyObject($trigger)
        ->setCapability(PhabricatorPolicyCapability::CAN_EDIT)
        ->setPolicies($policies)
        ->setError($e_edit));

    $form->appendControl(
      id(new AphrontFormSubmitControl())
        ->setValue($submit)
        ->addCancelButton($cancel_uri));

    $header = id(new PHUIHeaderView())
      ->setHeader($header);

    $box_view = id(new PHUIObjectBoxView())
      ->setHeader($header)
      ->setValidationException($validation_exception)
      ->appendChild($form);

    $column_view = id(new PHUITwoColumnView())
      ->setFooter($box_view);

    $crumbs = $this->buildApplicationCrumbs()
      ->setBorder(true);

    if ($column) {
      $crumbs->addTextCrumb(
        pht(
          '%s: %s',
          $column->getProject()->getDisplayName(),
          $column->getName()),
        $board_uri);
    }

    $crumbs->addTextCrumb($title);

    return $this->newPage()
      ->setTitle($title)
      ->setCrumbs($crumbs)
      ->appendChild($column_view);
  }

}