<?php
  
  namespace FootyRoom\Core\Comment;
  
  use DateTime;
  use FootyRoom\User\User;
  use FootyRoom\Core\CoreException;
  use FootyRoom\Core\EventGenerator;
  
  class Comment
  {
      use EventGenerator;
  
      /**
       * @var int
       */
      protected $id;
  
      /**
       * @var string
       */
      protected $discussionId;
  
      /**
       * @var \FootyRoom\Core\Comment\Author
       */
      protected $author;
  
      /**
       * @var string
       */
      protected $content;
  
      /**
       * @var string
       */
      protected $html;
  
      /**
       * @var \DateTime
       */
      protected $date;
  
      /**
       * @var int
       */
      protected $parentId;
  
      /**
       * @var bool
       */
      protected $isApproved;
  
      /**
       * Constructor.
       *
       * @param string $discussionId
       * @param \FootyRoom\Core\Comment\Author $author
       * @param string $content
       * @param string $html
       * @param int $parentId
       * @param bool $isApproved
       */
      public function __construct($discussionId, Author $author, $content, $html, $parentId = 0, $isApproved = true)
      {
          $this->discussionId = $discussionId;
          $this->author = $author;
          $this->setContent($content, $html);
          $this->parentId = $parentId;
          $this->isApproved = $isApproved;
          $this->date = new DateTime();
      }
  
      /**
       * Gets the value of discussionId.
       *
       * @return string
       */
      public function getDiscussionId()
      {
          return $this->discussionId;
      }
  
      /**
       * Gets the value of author.
       *
       * @return \FootyRoom\Core\Comment\Author
       */
      public function getAuthor()
      {
          return $this->author;
      }
  
      /**
       * Gets the value of id.
       *
       * @return int
       */
      public function getId()
      {
          return $this->id;
      }
  
      /**
       * Gets the value of content.
       *
       * @return string
       */
      public function getContent()
      {
          return $this->content;
      }
  
      /**
       * Gets the value of date.
       *
       * @return \DateTime
       */
      public function getDate()
      {
          return $this->date;
      }
  
      /**
       * Gets the value of parentId.
       *
       * @return int
       */
      public function getParentId()
      {
          return $this->parentId;
      }
  
      /**
       * Determines whether comment is approved by moderators.
       *
       * @return bool
       */
      public function isApproved()
      {
          return $this->isApproved;
      }
  
      /**
       * Edit comment content.
       *
       * @param string $content
       * @param string $html
       * @param \FootyRoom\User\User $editor
       */
      public function editContent($content, $html, User $editor)
      {
          // Check that new comment content is different from the current one.
          if ($content === $this->getContent()) {
              throw new CoreException('Edited comment is exactly the same as original.');
          }
  
          $oldContent = $this->content;
          $oldHtml = $this->html;
  
          $this->setContent($content, $html);
  
          $this->raise(new CommentEdited($this, $oldContent, $oldHtml, $editor));
      }
  
      /**
       * Sets content of comment.
       *
       * @param string $content
       * @param string $html
       */
      protected function setContent($content, $html)
      {
          // Check comment content is not empty.
          if (trim(preg_replace('/<br ?\/?>/', '', $content)) === '') {
              throw new CoreException('Your post content is empty.');
          }
  
          $this->content = $content;
          $this->html = $html;
      }
  
      /**
       * Gets the value of html.
       *
       * @return string
       */
      public function getHtml()
      {
          return $this->html;
      }
  
      /**
       * Approve an unapproved comment.
       */
      public function approve()
      {
          if (!$this->isApproved) {
              $this->isApproved = true;
  
              $this->raise(new CommentApproved($this));
          }
      }
  
      /**
       * Reject an approved comment.
       */
      public function reject()
      {
          if ($this->isApproved) {
              $this->isApproved = false;
  
              $this->raise(new CommentRemoved($this));
          }
      }
  }