<?php

/*
 * Copyright 2011 Facebook, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

class PhabricatorPasteCreateController extends PhabricatorPasteController {

  public function processRequest() {

    $request = $this->getRequest();
    $user = $request->getUser();
    $paste = new PhabricatorPaste();

    $error_view = null;
    $e_text = true;

    $paste_text = null;
    if ($request->isFormPost()) {
      $errors = array();
      $title = $request->getStr('title');

      $language = $request->getStr('language');
      if ($language == 'infer') {
        // If it's infer, store an empty string. Otherwise, store the
        // language name. We do this so we can refer to 'infer' elsewhere
        // in the code (such as default value) while retaining backwards
        // compatibility with old posts with no language stored.
        $language = '';
      }

      $text = $request->getStr('text');

      if (!strlen($text)) {
        $e_text = 'Required';
        $errors[] = 'The paste may not be blank.';
      } else {
        $e_text = null;
      }

      $paste->setTitle($title);
      $paste->setLanguage($language);

      if (!$errors) {
        $paste_file = PhabricatorFile::newFromFileData(
          $text,
          array(
            'name' => $title,
            'mime-type' => 'text/plain; charset=utf-8',
        ));
        $paste->setFilePHID($paste_file->getPHID());
        $paste->setAuthorPHID($user->getPHID());
        $paste->save();

        return id(new AphrontRedirectResponse())
          ->setURI('/P'.$paste->getID());
      } else {
        $error_view = new AphrontErrorView();
        $error_view->setErrors($errors);
        $error_view->setTitle('A problem has occurred!');
      }
    } else {
      $copy = $request->getInt('copy');
      if ($copy) {
        $copy_paste = id(new PhabricatorPaste())->load($copy);
        if ($copy_paste) {
          $title = nonempty($copy_paste->getTitle(), 'P'.$copy_paste->getID());
          $paste->setTitle('Copy of '.$title);
          $copy_file = id(new PhabricatorFile())->loadOneWhere(
            'phid = %s',
            $copy_paste->getFilePHID());
          $paste_text = $copy_file->loadFileData();
        }
      }
    }

    $form = new AphrontFormView();

    // If we're coming back from an error and the language was already defined,
    // use that. Otherwise, ask the config for the default.
    if ($paste->getLanguage()) {
      $language_default = $paste->getLanguage();
    } else {
      $language_default = PhabricatorEnv::getEnvConfig(
        'pygments.dropdown-default');
    }

    $available_languages = PhabricatorEnv::getEnvConfig(
      'pygments.dropdown-choices');
    asort($available_languages);

    $language_select = id(new AphrontFormSelectControl())
      ->setLabel('Language')
      ->setName('language')
      ->setValue($language_default)
      ->setOptions($available_languages);

    $form
      ->setUser($user)
      ->setAction($request->getRequestURI()->getPath())
      ->appendChild(
        id(new AphrontFormTextControl())
          ->setLabel('Title')
          ->setValue($paste->getTitle())
          ->setName('title'))
      ->appendChild($language_select)
      ->appendChild(
        id(new AphrontFormTextAreaControl())
          ->setLabel('Text')
          ->setError($e_text)
          ->setValue($paste_text)
          ->setHeight(AphrontFormTextAreaControl::HEIGHT_VERY_TALL)
          ->setName('text'))
      ->appendChild(
        id(new AphrontFormSubmitControl())
          ->addCancelButton('/paste/')
          ->setValue('Create Paste'));

    $panel = new AphrontPanelView();
    $panel->setWidth(AphrontPanelView::WIDTH_FORM);
    $panel->setHeader('Create a Paste');
    $panel->appendChild($form);

    return $this->buildStandardPageResponse(
      array(
        $error_view,
        $panel,
      ),
      array(
        'title' => 'Paste Creation',
        'tab' => 'create',
      ));
  }
}