<?php
/**
 * @brief		Blog Entry Comments API
 * @author		<a href='https://www.invisioncommunity.com'>Invision Power Services, Inc.</a>
 * @copyright	(c) Invision Power Services, Inc.
 * @license		https://www.invisioncommunity.com/legal/standards/
 * @package		Invision Community
 * @subpackage	Blog
 * @since		8 Dec 2015
 */

namespace IPS\blog\api;

/* To prentry PHP errors (extending class does not exist) revealing path */
if ( !\defined( '\IPS\SUITE_UNIQUE_KEY' ) )
{
	header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
	exit;
}

/**
 * @brief	Blog Entry Comments API
 */
class _comments extends \IPS\Content\Api\CommentController
{
	/**
	 * Class
	 */
	protected $class = 'IPS\blog\Entry\Comment';
	
	/**
	 * GET /blog/comments
	 *
	 * @note		For requests using an OAuth Access Token for a particular member, only comments the authorized user can view will be included, and all comments on draft entries are excluded
	 * @apiparam	string	blogs			Comma-delimited list of blog IDs
	 * @apiparam	string	authors			Comma-delimited list of member IDs - if provided, only topics started by those members are returned
	 * @apiparam	int		locked			If 1, only comments from entries which are locked are returned, if 0 only unlocked
	 * @apiparam	int		hidden			If 1, only comments which are hidden are returned, if 0 only not hidden
	 * @apiparam	int		pinned			If 1, only posts from  topics which are pinned are returned, if 0 only not pinned
	 * @apiparam	int		featured		If 1, only comments from  entries which are featured are returned, if 0 only not featured
	 * @apiparam	int		draft			If 1, only draft entries are returned, if 0 only published. Ignored for requests using an OAuth Access Token for a particular member
	 * @apiparam	string	sortBy			What to sort by. Can be 'date', 'title' or leave unspecified for ID
	 * @apiparam	string	sortDir			Sort direction. Can be 'asc' or 'desc' - defaults to 'asc'
	 * @apiparam	int		page			Page number
	 * @apiparam	int		perPage			Number of results per page - defaults to 25
	 * @return		\IPS\Api\PaginatedResponse<IPS\blog\Entry\Comment>
	 */
	public function GETindex()
	{
		/* Where clause */
		$where = array();
		
		/* Draft */
		if ( $this->member )
		{
			$where[] = array( 'entry_status=?', 'published' );
		}
		elseif ( isset( \IPS\Request::i()->draft ) )
		{
			$where[] = array( 'entry_status=?', \IPS\Request::i()->draft ? 'draft' : 'published' );
		}
				
		/* Return */
		return $this->_list( $where, 'blogs' );
	}
	
	/**
	 * GET /blog/comments/{id}
	 * View information about a specific comment
	 *
	 * @param		int		$id			ID Number
	 * @throws		2B301/1	INVALID_ID	The comment ID does not exist or the authorized user does not have permission to view it
	 * @return		\IPS\blog\Entry\Comment
	 */
	public function GETitem( $id )
	{
		try
		{
			$class = $this->class;
			if ( $this->member )
			{
				$object = $class::loadAndCheckPerms( $id, $this->member );
			}
			else
			{
				$object = $class::load( $id );
			}
			
			return new \IPS\Api\Response( 200, $object->apiOutput( $this->member ) );
		}
		catch ( \OutOfRangeException $e )
		{
			throw new \IPS\Api\Exception( 'INVALID_ID', '2B301/1', 404 );
		}
	}
	
	/**
	 * POST /blog/comments
	 * Create a comment
	 *
	 * @note	For requests using an OAuth Access Token for a particular member, any parameters the user doesn't have permission to use are ignored (for example, hidden will only be honoured if the authenticated user has permission to hide content).
	 * @reqapiparam	int			entry				The ID number of the entry the comment is for
	 * @reqapiparam	int			author				The ID number of the member making the comment (0 for guest). Required for requests made using an API Key or the Client Credentials Grant Type. For requests using an OAuth Access Token for a particular member, that member will always be the author
	 * @apiparam	string		author_name			If author is 0, the guest name that should be used
	 * @reqapiparam	string		content				The comment content as HTML (e.g. "<p>This is a comment.</p>"). Will be sanatized for requests using an OAuth Access Token for a particular member; will be saved unaltered for requests made using an API Key or the Client Credentials Grant Type. 
	 * @apiparam	datetime	date				The date/time that should be used for the comment date. If not provided, will use the current date/time. Ignored for requests using an OAuth Access Token for a particular member
	 * @apiparam	string		ip_address			The IP address that should be stored for the comment. If not provided, will use the IP address from the API request. Ignored for requests using an OAuth Access Token for a particular member
	 * @apiparam	int			hidden				0 = unhidden; 1 = hidden, pending moderator approval; -1 = hidden (as if hidden by a moderator)
	 * @apiparam	bool		anonymous			If 1, the item will be posted anonymously.
	 * @throws		2B301/2		INVALID_ID	The comment ID does not exist
	 * @throws		1B301/3		NO_AUTHOR	The author ID does not exist
	 * @throws		1B301/4		NO_CONTENT	No content was supplied
	 * @throws		2B301/8		NO_PERMISSION	The authorized user does not have permission to comment on that blog entry
	 * @return		\IPS\blog\Entry\Comment
	 */
	public function POSTindex()
	{
		/* Get entry */
		try
		{
			$entry = \IPS\blog\Entry::load( \IPS\Request::i()->entry );
		}
		catch ( \OutOfRangeException $e )
		{
			throw new \IPS\Api\Exception( 'INVALID_ID', '2B301/2', 403 );
		}
		
		/* Get author */
		if ( $this->member )
		{
			if ( !$entry->canComment( $this->member ) )
			{
				throw new \IPS\Api\Exception( 'NO_PERMISSION', '2B301/8', 403 );
			}
			$author = $this->member;
		}
		else
		{
			if ( \IPS\Request::i()->author )
			{
				$author = \IPS\Member::load( \IPS\Request::i()->author );
				if ( !$author->member_id )
				{
					throw new \IPS\Api\Exception( 'NO_AUTHOR', '1B301/3', 404 );
				}
			}
			else
			{
				$author = new \IPS\Member;
				$author->name = \IPS\Request::i()->author_name;
			}
		}
		
		/* Check we have a post */
		if ( !\IPS\Request::i()->content )
		{
			throw new \IPS\Api\Exception( 'NO_CONTENT', '1B301/4', 403 );
		}
		
		/* Do it */
		return $this->_create( $entry, $author );
	}
	
	/**
	 * POST /blog/comments/{id}
	 * Edit a comment
	 *
	 * @note		For requests using an OAuth Access Token for a particular member, any parameters the user doesn't have permission to use are ignored (for example, hidden will only be honoured if the authenticated user has permission to hide content).
	 * @param		int			$id				ID Number
	 * @apiparam	int			author			The ID number of the member making the comment (0 for guest). Ignored for requests using an OAuth Access Token for a particular member.
	 * @apiparam	string		author_name		If author is 0, the guest name that should be used
	 * @apiparam	string		content			The comment content as HTML (e.g. "<p>This is a comment.</p>"). Will be sanatized for requests using an OAuth Access Token for a particular member; will be saved unaltered for requests made using an API Key or the Client Credentials Grant Type. 
	 * @apiparam	int			hidden				1/0 indicating if the topic should be hidden
	 * @throws		2B301/5		INVALID_ID			The comment ID does not exist or the authorized user does not have permission to view it
	 * @throws		1B301/6		NO_AUTHOR			The author ID does not exist
	 * @throws		2B301/9		NO_PERMISSION		The authorized user does not have permission to edit the comment
	 * @return		\IPS\blog\Entry\Comment
	 */
	public function POSTitem( $id )
	{
		try
		{
			/* Load */
			$comment = \IPS\blog\Entry\Comment::load( $id );
			if ( $this->member and !$comment->canView( $this->member ) )
			{
				throw new \OutOfRangeException;
			}
			if ( $this->member and !$comment->canEdit( $this->member ) )
			{
				throw new \IPS\Api\Exception( 'NO_PERMISSION', '2B301/9', 403 );
			}
						
			/* Do it */
			try
			{
				return $this->_edit( $comment );
			}
			catch ( \InvalidArgumentException $e )
			{
				throw new \IPS\Api\Exception( 'NO_AUTHOR', '1B301/6', 400 );
			}
		}
		catch ( \OutOfRangeException $e )
		{
			throw new \IPS\Api\Exception( 'INVALID_ID', '2B301/5', 404 );
		}
	}
		
	/**
	 * DELETE /blog/comments/{id}
	 * Deletes a comment
	 *
	 * @param		int			$id			ID Number
	 * @throws		2B301/7		INVALID_ID		The comment ID does not exist
	 * @throws		2B301/A		NO_PERMISSION	The authorized user does not have permission to delete the comment
	 * @return		void
	 */
	public function DELETEitem( $id )
	{
		try
		{			
			$class = $this->class;
			$object = $class::load( $id );
			if ( $this->member and !$object->canDelete( $this->member ) )
			{
				throw new \IPS\Api\Exception( 'NO_PERMISSION', '2B301/A', 403 );
			}
			$object->delete();
			
			return new \IPS\Api\Response( 200, NULL );
		}
		catch ( \OutOfRangeException $e )
		{
			throw new \IPS\Api\Exception( 'INVALID_ID', '2B301/7', 404 );
		}
	}
}