<?php

final class PhabricatorProjectColumnEditController
  extends PhabricatorProjectBoardController {

  private $id;
  private $projectID;

  public function willProcessRequest(array $data) {
    $this->projectID = $data['projectID'];
    $this->id = idx($data, 'id');
  }

  public function processRequest() {
    $request = $this->getRequest();
    $viewer = $request->getUser();

    $project = id(new PhabricatorProjectQuery())
      ->setViewer($viewer)
      ->requireCapabilities(
        array(
          PhabricatorPolicyCapability::CAN_VIEW,
          PhabricatorPolicyCapability::CAN_EDIT,
        ))
      ->withIDs(array($this->projectID))
      ->executeOne();

    if (!$project) {
      return new Aphront404Response();
    }
    $this->setProject($project);

    $is_new = ($this->id ? false : true);

    if (!$is_new) {
      $column = id(new PhabricatorProjectColumnQuery())
        ->setViewer($viewer)
        ->withIDs(array($this->id))
        ->requireCapabilities(
          array(
            PhabricatorPolicyCapability::CAN_VIEW,
            PhabricatorPolicyCapability::CAN_EDIT,
          ))
        ->executeOne();
      if (!$column) {
        return new Aphront404Response();
      }
    } else {
      $column = PhabricatorProjectColumn::initializeNewColumn($viewer);
    }

    $e_name = null;
    $e_limit = null;

    $v_limit = $column->getPointLimit();
    $v_name = $column->getName();

    $validation_exception = null;
    $base_uri = '/board/'.$this->projectID.'/';
    if ($is_new) {
      // we want to go back to the board
      $view_uri = $this->getApplicationURI($base_uri);
    } else {
      $view_uri = $this->getApplicationURI($base_uri.'column/'.$this->id.'/');
    }

    if ($request->isFormPost()) {
      $v_name = $request->getStr('name');
      $v_limit = $request->getStr('limit');

      if ($is_new) {
        $column->setProjectPHID($project->getPHID());
        $column->attachProject($project);

        $columns = id(new PhabricatorProjectColumnQuery())
          ->setViewer($viewer)
          ->withProjectPHIDs(array($project->getPHID()))
          ->execute();

        $new_sequence = 1;
        if ($columns) {
          $values = mpull($columns, 'getSequence');
          $new_sequence = max($values) + 1;
        }
        $column->setSequence($new_sequence);
      }

      $xactions = array();

      $type_name = PhabricatorProjectColumnTransaction::TYPE_NAME;
      $xactions[] = id(new PhabricatorProjectColumnTransaction())
        ->setTransactionType($type_name)
        ->setNewValue($v_name);

      $type_limit = PhabricatorProjectColumnTransaction::TYPE_LIMIT;
      $xactions[] = id(new PhabricatorProjectColumnTransaction())
        ->setTransactionType($type_limit)
        ->setNewValue($v_limit);

      try {
        $editor = id(new PhabricatorProjectColumnTransactionEditor())
          ->setActor($viewer)
          ->setContinueOnNoEffect(true)
          ->setContentSourceFromRequest($request)
          ->applyTransactions($column, $xactions);
        return id(new AphrontRedirectResponse())->setURI($view_uri);
      } catch (PhabricatorApplicationTransactionValidationException $ex) {
        $e_name = $ex->getShortMessage($type_name);
        $e_limit = $ex->getShortMessage($type_limit);
        $validation_exception = $ex;
      }
    }

    $form = new AphrontFormView();
    $form
      ->setUser($request->getUser())
      ->appendChild(
        id(new AphrontFormTextControl())
          ->setValue($v_name)
          ->setLabel(pht('Name'))
          ->setName('name')
          ->setError($e_name)
          ->setCaption(
            pht('This will be displayed as the header of the column.')))
      ->appendChild(
        id(new AphrontFormTextControl())
          ->setValue($v_limit)
          ->setLabel(pht('Point Limit'))
          ->setName('limit')
          ->setError($e_limit)
          ->setCaption(
            pht('Maximum number of points of tasks allowed in the column.')));


    if ($is_new) {
      $title = pht('Create Column');
      $submit = pht('Create Column');
      $crumb_text = pht('Create Column');
    } else {
      $title = pht('Edit %s', $column->getDisplayName());
      $submit = pht('Save Column');
      $crumb_text = pht('Edit');
    }

    $form->appendChild(
      id(new AphrontFormSubmitControl())
        ->setValue($submit)
        ->addCancelButton($view_uri));

    $crumbs = $this->buildApplicationCrumbs();
    $crumbs->addTextCrumb(
      pht('Board'),
      $this->getApplicationURI('board/'.$project->getID().'/'));

    if (!$is_new) {
      $crumbs->addTextCrumb(
        $column->getDisplayName(),
        $view_uri);
    }

    $crumbs->addTextCrumb($crumb_text);

    $form_box = id(new PHUIObjectBoxView())
      ->setHeaderText($title)
      ->setValidationException($validation_exception)
      ->setForm($form);

    return $this->buildApplicationPage(
      array(
        $crumbs,
        $form_box,
      ),
      array(
        'title' => $title,
      ));
  }
}