<?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.
 */

abstract class DifferentialReviewRequestMail extends DifferentialMail {

  protected $comments;

  public function setComments($comments) {
    $this->comments = $comments;
    return $this;
  }

  public function getComments() {
    return $this->comments;
  }

  public function __construct(
    DifferentialRevision $revision,
    PhabricatorObjectHandle $actor,
    array $changesets) {

    $this->setRevision($revision);
    $this->setActorHandle($actor);
    $this->setChangesets($changesets);
  }

  protected function renderReviewersLine() {
    $reviewers = $this->getRevision()->getReviewers();
    $handles = id(new PhabricatorObjectHandleData($reviewers))->loadHandles();
    return 'Reviewers: '.$this->renderHandleList($handles, $reviewers);
  }

  protected function renderReviewRequestBody() {
    $revision = $this->getRevision();

    $body = array();
    if ($this->isFirstMailToRecipients()) {
      $body[] = $this->formatText($revision->getSummary());
      $body[] = null;

      $body[] = 'TEST PLAN';
      $body[] = $this->formatText($revision->getTestPlan());
      $body[] = null;
    } else {
      if (strlen($this->getComments())) {
        $body[] = $this->formatText($this->getComments());
        $body[] = null;
      }
    }

    $body[] = $this->renderRevisionDetailLink();
    $body[] = null;

    $changesets = $this->getChangesets();
    if ($changesets) {
      $body[] = 'AFFECTED FILES';
      foreach ($changesets as $changeset) {
        $body[] = '  '.$changeset->getFilename();
      }
      $body[] = null;
    }

    return implode("\n", $body);
  }

  protected function buildAttachments() {
    $attachments = array();
    if (PhabricatorEnv::getEnvConfig('metamta.differential.attach-patches')) {
      $revision = $this->getRevision();
      $revision_id = $revision->getID();

      $diffs = $revision->loadDiffs();
      $diff_number = count($diffs);
      $diff = array_pop($diffs);

      $filename = "D{$revision_id}.{$diff_number}.patch";

      $diff->attachChangesets($diff->loadChangesets());
      // TODO: We could batch this to improve performance.
      foreach ($diff->getChangesets() as $changeset) {
        $changeset->attachHunks($changeset->loadHunks());
      }
      $diff_dict = $diff->getDiffDict();

      $changes = array();
      foreach ($diff_dict['changes'] as $changedict) {
        $changes[] = ArcanistDiffChange::newFromDictionary($changedict);
      }
      $bundle = ArcanistBundle::newFromChanges($changes);
      $unified_diff = $bundle->toUnifiedDiff();

      $attachments[] = new PhabricatorMetaMTAAttachment(
        $unified_diff,
        $filename,
        'text/x-patch; charset=utf-8'
      );
    }
    return $attachments;
  }
}