<?php
	# Mantis - a php based bugtracking system
	# Copyright (C) 2000 - 2002  Kenzaburo Ito - kenito@300baud.org
	# Copyright (C) 2002 - 2004  Mantis Team   - mantisbt-dev@lists.sourceforge.net
	# This program is distributed under the terms and conditions of the GPL
	# See the README and LICENSE files for details

	# --------------------------------------------------------
	# $Id: relationship_api.php,v 1.36 2005/06/28 11:04:06 vboctor Exp $
	# --------------------------------------------------------

	### Relationship API ###

	$t_core_dir = dirname( __FILE__ ).DIRECTORY_SEPARATOR;

	require_once( $t_core_dir . 'collapse_api.php' );

	# ======================================================================
	# Author: Marcello Scata' <marcelloscata at users.sourceforge.net> ITALY
	# ======================================================================
	# RELATIONSHIP DEFINITIONS
	# * Child/parent relationship:
	#    the child bug is generated by the parent bug or is directly linked with the parent with the following meaning
	#    the child bug has to be resolved before resolving the parent bug (the child bug "blocks" the parent bug)
	#    example: bug A is child bug of bug B. It means: A blocks B and B is blocked by A
	# * General relationship:
	#    two bugs related each other without any hierarchy dependance
	#    bugs A and B are related
	# * Duplicates:
	#    it's used to mark a bug as duplicate of an other bug already stored in the database
	#    bug A is marked as duplicate of B. It means: A duplicates B, B has duplicates
	#
	# Relations are always visible in the email body
	# --------------------------------------------------------------------
	# ADD NEW RELATIONSHIP
	# - Permission: user can update the source bug and at least view the destination bug
	# - Action recorded in the history of both the bugs
	# - Email notification sent to the users of both the bugs based based on the 'updated' bug notify type.
	# --------------------------------------------------------
	# DELETE RELATIONSHIP
	# - Permission: user can update the source bug and at least view the destination bug
	# - Action recorded in the history of both the bugs
	# - Email notification sent to the users of both the bugs based based on the 'updated' bug notify type.
	# --------------------------------------------------------
	# RESOLVE/CLOSE BUGS WITH BLOCKING CHILD BUGS STILL OPEN
	# Just a warning is print out on the form when an user attempts to resolve or close a bug with
	# related bugs in relation BUG_DEPENDANT still not resolved.
	# Anyway the user can force the resolving/closing action.
	# --------------------------------------------------------
	# EMAIL NOTIFICATION TO PARENT BUGS WHEN CHILDREN BUGS ARE RESOLVED/CLOSED
	# Every time a child bug is resolved or closed, an email notification is sent directly to all the handlers
	# of the parent bugs. The notification is sent to bugs not already marked as resolved or closed.
	# --------------------------------------------------------
	# ADD CHILD
	# This function gives the opportunity to generate a child bug. In details the function:
	# - create a new bug with the same basic information of the parent bug (plus the custom fields)
	# - copy all the attachment of the parent bug to the child
	# - not copy history, bugnotes, monitoring users
	# - set a relationship between parent and child
	# --------------------------------------------------------

	class BugRelationshipData {
		var $id;
		var $src_bug_id;
		var $src_project_id;
		var $dest_bug_id;
		var $dest_project_id;
		var $type;
	}

	# --------------------
	# Return the complementary type of the provided relationship
	function relationship_get_complementary_type( $p_relationship_type ) {
		switch ( $p_relationship_type ) {
			case BUG_BLOCKS:
				return BUG_DEPENDANT;
				break;
			case BUG_DEPENDANT:
				return BUG_BLOCKS;
				break;
			case BUG_HAS_DUPLICATE:
				return BUG_DUPLICATE;
				break;
			case BUG_DUPLICATE:
				return BUG_HAS_DUPLICATE;
				break;
			case BUG_RELATED:
				return BUG_RELATED;
				break;
			default:
				trigger_error( ERROR_GENERIC, ERROR );
				break;
		}
	}

	# --------------------
	function relationship_add( $p_src_bug_id, $p_dest_bug_id, $p_relationship_type ) {
		$t_mantis_bug_relationship_table = config_get( 'mantis_bug_relationship_table' );

		if( $p_relationship_type == BUG_BLOCKS || $p_relationship_type == BUG_HAS_DUPLICATE ) {
			# BUG_BLOCKS or BUG_HAS_DUPLICATE -> swap src and dest
			$c_src_bug_id = db_prepare_int( $p_dest_bug_id );
			$c_dest_bug_id = db_prepare_int( $p_src_bug_id );
			$c_relationship_type = db_prepare_int( relationship_get_complementary_type( $p_relationship_type ) );
		}
		else {
			$c_src_bug_id = db_prepare_int( $p_src_bug_id );
			$c_dest_bug_id = db_prepare_int( $p_dest_bug_id );
			$c_relationship_type = db_prepare_int( $p_relationship_type );
		}

		$query = "INSERT INTO $t_mantis_bug_relationship_table
				( source_bug_id, destination_bug_id, relationship_type )
				VALUES
				( '$c_src_bug_id', '$c_dest_bug_id', '$c_relationship_type' )";
		$result = db_query( $query );
		$t_relationship = db_fetch_array( $result );

		$t_bug_relationship_data = new BugRelationshipData;
		$t_bug_relationship_data->id = $t_relationship['id'];
		$t_bug_relationship_data->src_bug_id = $t_relationship['source_bug_id'];
		$t_bug_relationship_data->dest_bug_id = $t_relationship['destination_bug_id'];
		$t_bug_relationship_data->type = $t_relationship['relationship_type'];

		return $t_bug_relationship_data;
	}

	# --------------------
	function relationship_update( $p_relationship_id, $p_src_bug_id, $p_dest_bug_id, $p_relationship_type ) {
		$t_mantis_bug_relationship_table = config_get( 'mantis_bug_relationship_table' );

		if( $p_relationship_type == BUG_BLOCKS || $p_relationship_type == BUG_HAS_DUPLICATE ) {
			# BUG_BLOCKS or BUG_HAS_DUPLICATE -> swap src and dest
			$c_src_bug_id = db_prepare_int( $p_dest_bug_id );
			$c_dest_bug_id = db_prepare_int( $p_src_bug_id );
			$c_relationship_type = db_prepare_int( relationship_get_complementary_type( $p_relationship_type ) );
		}
		else {
			$c_src_bug_id = db_prepare_int( $p_src_bug_id );
			$c_dest_bug_id = db_prepare_int( $p_dest_bug_id );
			$c_relationship_type = db_prepare_int( $p_relationship_type );
		}
		$c_relationship_id = db_prepare_int( $p_relationship_id );

		$query = "UPDATE $t_mantis_bug_relationship_table
				SET source_bug_id='$c_src_bug_id',
					destination_bug_id='$c_dest_bug_id',
					relationship_type='$c_relationship_type'
				WHERE id='$c_relationship_id'";
		$result = db_query( $query );
		$t_relationship = db_fetch_array( $result );

		$t_bug_relationship_data = new BugRelationshipData;
		$t_bug_relationship_data->id = $t_relationship['id'];
		$t_bug_relationship_data->src_bug_id = $t_relationship['source_bug_id'];
		$t_bug_relationship_data->dest_bug_id = $t_relationship['destination_bug_id'];
		$t_bug_relationship_data->type = $t_relationship['relationship_type'];

		return $t_bug_relationship_data;
	}

	# --------------------
	function relationship_delete( $p_relationship_id ) {
		$c_relationship_id = db_prepare_int( $p_relationship_id );

		$t_mantis_bug_relationship_table = config_get( 'mantis_bug_relationship_table' );

		$query = "DELETE FROM $t_mantis_bug_relationship_table
				WHERE id='$c_relationship_id'";
		$result = db_query( $query );
	}

	# --------------------
	# Deletes all the relationships related to a specific bug (both source and destination)
	function relationship_delete_all( $p_bug_id ) {
		$c_bug_id = db_prepare_int( $p_bug_id );

		$t_mantis_bug_relationship_table = config_get( 'mantis_bug_relationship_table' );

		$query = "DELETE FROM $t_mantis_bug_relationship_table
				WHERE source_bug_id='$c_bug_id' OR
				destination_bug_id='$c_bug_id'";
		$result = db_query( $query );
	}

	# --------------------
	# copy all the relationships related to a specific bug to a new bug
	function relationship_copy_all( $p_bug_id, $p_new_bug_id ) {
		$c_bug_id = db_prepare_int( $p_bug_id );
		$c_new_bug_id = db_prepare_int( $p_new_bug_id );

		$t_mantis_bug_relationship_table = config_get( 'mantis_bug_relationship_table' );

		$t_relationship = relationship_get_all_src( $p_bug_id );
		$t_relationship_count = count( $t_relationship );
		for ( $i = 0 ; $i < $t_relationship_count ; $i++ ) {
			relationship_add($p_new_bug_id, $t_relationship[$i]->dest_bug_id, $t_relationship[$i]->type);
		}

		$t_relationship = relationship_get_all_dest( $p_bug_id );
		$t_relationship_count = count( $t_relationship );
		for ( $i = 0 ; $i < $t_relationship_count ; $i++ ) {
			relationship_add($t_relationship[$i]->src_bug_id, $p_new_bug_id, $t_relationship[$i]->type);
		}

		return;
	}

	# --------------------
	function relationship_get( $p_relationship_id ) {
		$c_relationship_id = db_prepare_int( $p_relationship_id );

		$t_mantis_bug_relationship_table = config_get( 'mantis_bug_relationship_table' );

		$query = "SELECT *
				FROM $t_mantis_bug_relationship_table
				WHERE id='$c_relationship_id'";
		$result = db_query( $query, 1 );

		$t_relationship_count = db_num_rows( $result );

		if ( $t_relationship_count == 1 ) {
			$t_relationship = db_fetch_array( $result );

			$t_bug_relationship_data = new BugRelationshipData;
			$t_bug_relationship_data->id = $t_relationship['id'];
			$t_bug_relationship_data->src_bug_id = $t_relationship['source_bug_id'];
			$t_bug_relationship_data->dest_bug_id = $t_relationship['destination_bug_id'];
			$t_bug_relationship_data->type = $t_relationship['relationship_type'];
		}
		else {
			$t_bug_relationship_data = null;
		}

		return $t_bug_relationship_data;
	}

	# --------------------
	function relationship_get_all_src( $p_src_bug_id ) {
		$c_src_bug_id = db_prepare_int( $p_src_bug_id );

		$t_mantis_bug_relationship_table = config_get( 'mantis_bug_relationship_table' );
		$t_mantis_bug_table = config_get( 'mantis_bug_table' );

		$query = "SELECT $t_mantis_bug_relationship_table.id, $t_mantis_bug_relationship_table.relationship_type,
				$t_mantis_bug_relationship_table.source_bug_id, $t_mantis_bug_relationship_table.destination_bug_id,
				$t_mantis_bug_table.project_id
				FROM $t_mantis_bug_relationship_table
				INNER JOIN $t_mantis_bug_table ON $t_mantis_bug_relationship_table.destination_bug_id = $t_mantis_bug_table.id
				WHERE source_bug_id='$c_src_bug_id'
				ORDER BY relationship_type, $t_mantis_bug_relationship_table.id";
		$result = db_query( $query );

		$t_src_project_id = bug_get_field( $p_src_bug_id, 'project_id' );

		$t_bug_relationship_data = array( new BugRelationshipData );
		$t_relationship_count = db_num_rows( $result );
		for ( $i = 0 ; $i < $t_relationship_count ; $i++ ) {
			$row = db_fetch_array( $result );
			$t_bug_relationship_data[$i]->id = $row['id'];
			$t_bug_relationship_data[$i]->src_bug_id = $row['source_bug_id'];
			$t_bug_relationship_data[$i]->src_project_id = $t_src_project_id;
			$t_bug_relationship_data[$i]->dest_bug_id = $row['destination_bug_id'];
			$t_bug_relationship_data[$i]->dest_project_id = $row['project_id'];
			$t_bug_relationship_data[$i]->type = $row['relationship_type'];
		}
		unset( $t_bug_relationship_data[$t_relationship_count] );

		return $t_bug_relationship_data;
	}

	# --------------------
	function relationship_get_all_dest( $p_dest_bug_id ) {
		$c_dest_bug_id = db_prepare_int( $p_dest_bug_id );

		$t_mantis_bug_relationship_table = config_get( 'mantis_bug_relationship_table' );
		$t_mantis_bug_table = config_get( 'mantis_bug_table' );

		$query = "SELECT $t_mantis_bug_relationship_table.id, $t_mantis_bug_relationship_table.relationship_type,
				$t_mantis_bug_relationship_table.source_bug_id, $t_mantis_bug_relationship_table.destination_bug_id,
				$t_mantis_bug_table.project_id
				FROM $t_mantis_bug_relationship_table
				INNER JOIN $t_mantis_bug_table ON $t_mantis_bug_relationship_table.source_bug_id = $t_mantis_bug_table.id
				WHERE destination_bug_id='$c_dest_bug_id'
				ORDER BY relationship_type, $t_mantis_bug_relationship_table.id";
		$result = db_query( $query );

		$t_dest_project_id = bug_get_field( $p_dest_bug_id, 'project_id' );

		$t_bug_relationship_data = array( new BugRelationshipData );
		$t_relationship_count = db_num_rows( $result );
		for ( $i = 0 ; $i < $t_relationship_count ; $i++ ) {
			$row = db_fetch_array( $result );
			$t_bug_relationship_data[$i]->id = $row['id'];
			$t_bug_relationship_data[$i]->src_bug_id = $row['source_bug_id'];
			$t_bug_relationship_data[$i]->src_project_id = $row['project_id'];
			$t_bug_relationship_data[$i]->dest_bug_id = $row['destination_bug_id'];
			$t_bug_relationship_data[$i]->dest_project_id = $t_dest_project_id;
			$t_bug_relationship_data[$i]->type = $row['relationship_type'];
		}
		unset( $t_bug_relationship_data[$t_relationship_count] );

		return $t_bug_relationship_data;
	}

	# --------------------
	function relationship_get_all( $p_bug_id, &$p_is_different_projects ) {
		$t_src = relationship_get_all_src( $p_bug_id );
		$t_dest = relationship_get_all_dest( $p_bug_id );
		$t_all = array_merge( $t_src, $t_dest );

		$p_is_different_projects = false;
		for ( $i = 0 ; $i < count( $t_all ) ; $i++ ) {
			$p_is_different_projects |= ( $t_all[$i]->src_project_id != $t_all[$i]->dest_project_id );
		}
		return $t_all;
	}

	# --------------------
	# convert the relationship type in the type from the src/dest issues point of view
	# i.e. issue A  is dependent (BUG_DEPENDANT) on issue B
	#      passing B, A and this relationship as parameters, the return value will be BUG_BLOCKS
	#      (issue B blocks issue A)
	# return the relationship type using the information in the p_rel structure but src/dest issues as indicated
	function relationship_conv_type_to_this_src_dest( $p_src_bug_id, $p_dest_bug_id, $p_rel ) {
		if ( $p_rel->src_bug_id == $p_src_bug_id && $p_rel->dest_bug_id == $p_dest_bug_id ) {
			return $p_rel->type;
		}
		else if ( $p_rel->src_bug_id == $p_dest_bug_id && $p_rel->dest_bug_id == $p_src_bug_id ) {
			return relationship_get_complementary_type( $p_rel->type );
		}
		else {
			trigger_error( ERROR_RELATIONSHIP_NOT_FOUND, ERROR );
		}
	}

	# --------------------
	# check if there is a relationship between two bugs
	# return id if found 0 otherwise
	function relationship_exists( $p_src_bug_id, $p_dest_bug_id ) {
		$c_src_bug_id = db_prepare_int( $p_src_bug_id );
		$c_dest_bug_id = db_prepare_int( $p_dest_bug_id );

		$t_mantis_bug_relationship_table = config_get( 'mantis_bug_relationship_table' );

		$t_query = "SELECT *
				FROM $t_mantis_bug_relationship_table
				WHERE
				(source_bug_id='$c_src_bug_id'
				AND destination_bug_id='$c_dest_bug_id')
				OR
				(source_bug_id='$c_dest_bug_id'
				AND destination_bug_id='$c_src_bug_id')";
		$result = db_query( $t_query, 1 );

		$t_relationship_count = db_num_rows( $result );

		if ( $t_relationship_count == 1 ) {
			# return the first id
			$row = db_fetch_array( $result );
			return $row['id'];
		}
		else {
			# no relationship found
			return 0;
		}
	}

	# --------------------
	# check if there is a relationship between two bugs
	# return:
	#   0 if the relationship is not found
	#  -1 if the relationship is found and it's of the same type $p_rel_type
	#  id if the relationship is found and it's of a different time (this means it can be replaced with the new type $p_rel_type
	function relationship_same_type_exists( $p_src_bug_id, $p_dest_bug_id, $p_rel_type ) {
		# Check if there is already a relationship set between them
		$t_id_relationship = relationship_exists( $p_src_bug_id, $p_dest_bug_id );

		if ( $t_id_relationship > 0 ) {
			# if there is...

			# get all the relationship info
			$t_relationship = relationship_get( $t_id_relationship );

			if ( $t_relationship->src_bug_id == $p_src_bug_id && $t_relationship->dest_bug_id == $p_dest_bug_id ) {
				if( $t_relationship->type == $p_rel_type ) $t_id_relationship = -1;
			}
			else {
				if( $t_relationship->type == relationship_get_complementary_type( $p_rel_type ) ) $t_id_relationship = -1;
			}
		}
		return $t_id_relationship;
	}

	# --------------------
	# retrieve the linked bug id of the relationship: provide src -> return dest; provide dest -> return src
	function relationship_get_linked_bug_id( $p_relationship_id, $p_bug_id ) {

		$t_bug_relationship_data = relationship_get( $p_relationship_id );

		if ( $t_bug_relationship_data->src_bug_id == $p_bug_id ) {
			return $t_bug_relationship_data->dest_bug_id;
		}

		if ( $t_bug_relationship_data->dest_bug_id == $p_bug_id ) {
			return $t_bug_relationship_data->src_bug_id;
		}

		trigger_error( ERROR_RELATIONSHIP_NOT_FOUND, ERROR );
	}

	# --------------------
	# get class description of a relationship (source side)
	function relationship_get_description_src_side( $p_relationship_type ) {
		switch ( $p_relationship_type ) {
			case BUG_DUPLICATE:
				return lang_get( 'duplicate_of' );
				break;
			case BUG_RELATED:
				return lang_get( 'related_to' ) ;
				break;
			case BUG_DEPENDANT:
				return lang_get( 'dependant_on' ) ;
				break;
			default:
				trigger_error( ERROR_RELATIONSHIP_NOT_FOUND, ERROR );
		}
	}

	# --------------------
	# get class description of a relationship (destination side)
	function relationship_get_description_dest_side( $p_relationship_type ) {
		switch ( $p_relationship_type ) {
			case BUG_DUPLICATE:
				return lang_get( 'has_duplicate' ) ;
				break;
			case BUG_RELATED:
				return lang_get( 'related_to' ) ;
				break;
			case BUG_DEPENDANT:
				return lang_get( 'blocks' ) ;
				break;
			default:
				trigger_error( ERROR_RELATIONSHIP_NOT_FOUND, ERROR );
		}
	}

	# --------------------
	# get class description of a relationship as it's stored in the history
	function relationship_get_description_for_history( $p_relationship_code ) {
		switch ( $p_relationship_code ) {
			case BUG_HAS_DUPLICATE:
				return lang_get( 'has_duplicate' ) ;
				break;
			case BUG_DUPLICATE:
				return lang_get( 'duplicate_of' );
				break;
			case BUG_BLOCKS:
				return lang_get( 'blocks' ) ;
				break;
			case BUG_DEPENDANT:
				return lang_get( 'dependant_on' ) ;
				break;
			case BUG_RELATED:
				return lang_get( 'related_to' ) ;
				break;
			default:
				trigger_error( ERROR_RELATIONSHIP_NOT_FOUND, ERROR );
		}
	}

	# --------------------
	# return false if there are child bugs not resolved/closed
	# N.B. we don't check if the parent bug is read-only. This is because the answer of this function is indepent from
	# the state of the parent bug itself.
	function relationship_can_resolve_bug( $p_bug_id ) {

		# retrieve all the relationships in which the bug is the source bug
		$t_relationship = relationship_get_all_src( $p_bug_id );
		$t_relationship_count = count( $t_relationship );
		if ( $t_relationship_count == 0 ) {
			return true;
		}

		for ( $i = 0 ; $i < $t_relationship_count ; $i++ ) {
			# verify if each bug in relation BUG_DEPENDANT is already marked as resolved
			if ( $t_relationship[$i]->type == BUG_DEPENDANT ) {
				$t_dest_bug_id = $t_relationship[$i]->dest_bug_id;
				$t_status = bug_get_field( $t_dest_bug_id, 'status' );
				if ( $t_status < config_get( 'bug_resolved_status_threshold' ) ) {
					# the bug is NOT marked as resolved/closed
					return false;
				}
			}
		}

		return true;
	}

	# --------------------
	# return formatted string with all the details on the requested relationship
	function relationship_get_details( $p_bug_id, $p_relationship, $p_html = false, $p_html_preview = false, $p_show_project = false ) {
		$t_summary_wrap_at = strlen( config_get( 'email_separator2' ) ) - 28;
		$t_icon_path = config_get( 'icon_path' );

		$p_user_id = auth_get_current_user_id();

		if ( $p_bug_id == $p_relationship->src_bug_id ) {
			# root bug is in the src side, related bug in the dest side
			$t_related_bug_id = $p_relationship->dest_bug_id;
			$t_related_project_name = project_get_name( $p_relationship->dest_project_id );
			$t_relationship_descr = relationship_get_description_src_side( $p_relationship->type );
		}
		else {
			# root bug is in the dest side, related bug in the src side
			$t_related_bug_id = $p_relationship->src_bug_id;
			$t_related_project_name = project_get_name( $p_relationship->src_project_id );
			$t_relationship_descr = relationship_get_description_dest_side( $p_relationship->type );
		}

		# related bug not existing...
		if ( !bug_exists( $t_related_bug_id ) ) {
			return '';
		}

		# user can access to the related bug at least as a viewer
		if ( !access_has_bug_level( VIEWER, $t_related_bug_id ) ) {
			return '';
		}

		if ( $p_html_preview == false ) {
			$t_td = '<td>';
		}
		else {
			$t_td = '<td class="print">';
		}

		# get the information from the related bug and prepare the link
		$t_bug = bug_prepare_display( bug_get( $t_related_bug_id, true ) );
		$t_status = string_attribute( get_enum_element( 'status', $t_bug->status ) );
		$t_resolution = string_attribute( get_enum_element( 'resolution', $t_bug->resolution ) );

		$t_relationship_info_html = $t_td . '<nobr>' . $t_relationship_descr . '</nobr>&nbsp;</td>';
		if ( $p_html_preview == false ) {
			$t_relationship_info_html .= '<td><a href="' . string_get_bug_view_url( $t_related_bug_id ) . '">' . bug_format_id( $t_related_bug_id ) . '</a></td>';
			$t_relationship_info_html .= '<td><a title="' . $t_resolution . '"><u>' . $t_status . '</u>&nbsp;</a></td>';
		}
		else {
			$t_relationship_info_html .= $t_td . bug_format_id( $t_related_bug_id ) . '</td>';
			$t_relationship_info_html .= $t_td . $t_status . '&nbsp;</td>';
		}

		$t_relationship_info_text = str_pad( $t_relationship_descr, 20 );
		$t_relationship_info_text .= str_pad( bug_format_id( $t_related_bug_id ), 8 );

		# get the handler name of the related bug
		$t_relationship_info_html .= $t_td;
		if ( $t_bug->handler_id > 0 )  {
			$t_relationship_info_html .= '<nobr>' . prepare_user_name(  $t_bug->handler_id ) . '</nobr>';
		}
		$t_relationship_info_html .= '&nbsp;</td>';

		# add project name
		if( $p_show_project ) {
			$t_relationship_info_html .= $t_td . $t_related_project_name . '&nbsp;</td>';
		}

		# add summary
		$t_relationship_info_html .= $t_td . $t_bug->summary;
		if ( VS_PRIVATE == $t_bug->view_state ) {
			$t_relationship_info_html .= sprintf( ' <img src="%s" alt="(%s)" title="%s" />', $t_icon_path . 'protected.gif', lang_get( 'private' ), lang_get( 'private' ) );
		}
		if( strlen( $t_bug->summary ) <= $t_summary_wrap_at ) {
			$t_relationship_info_text .= $t_bug->summary;
		}
		else {
			$t_relationship_info_text .= substr( $t_bug->summary, 0, $t_summary_wrap_at - 3 ) . '...';
		}

		# add delete link if bug not read only and user has access level
		if ( !bug_is_readonly( $p_bug_id ) && !current_user_is_anonymous() && ( $p_html_preview == false ) ) {
			if ( access_has_bug_level( config_get( 'update_bug_threshold' ), $p_bug_id ) ) {
				$t_relationship_info_html .= " [<a class=\"small\" href=\"bug_relationship_delete.php?bug_id=$p_bug_id&rel_id=$p_relationship->id\">" . lang_get('delete_link') . '</a>]';
			}
		}

		$t_relationship_info_html .= '&nbsp;</td>';
		$t_relationship_info_text .= "\n";

		if ( $p_html_preview == false ) {
			$t_relationship_info_html = '<tr bgcolor="' . get_status_color( $t_bug->status ) . '">' . $t_relationship_info_html . '</tr>' . "\n";
		}
		else {
			$t_relationship_info_html = '<tr>' . $t_relationship_info_html . '</tr>';
		}

		if ( $p_html == true ) {
			return $t_relationship_info_html;
		}
		else {
			return $t_relationship_info_text;
		}

	}

	# --------------------
	# print ALL the RELATIONSHIPS OF A SPECIFIC BUG
	function relationship_get_summary_html( $p_bug_id ) {
		$t_summary = '';
		$t_show_project = false;

		$t_relationship_all = relationship_get_all( $p_bug_id, $t_show_project );
		$t_relationship_all_count = count( $t_relationship_all );

		#prepare the relationships table
		for ( $i = 0 ; $i < $t_relationship_all_count ; $i++ ) {
			$t_summary .= relationship_get_details ( $p_bug_id, $t_relationship_all[$i], true, false, $t_show_project );
		}

		if ( !is_blank( $t_summary ) ) {
			if ( relationship_can_resolve_bug( $p_bug_id ) == false ) {
				$t_summary .= '<tr class="row-2"><td colspan=' . (5 + $t_show_project) . '><b>' . lang_get( 'relationship_warning_blocking_bugs_not_resolved' ) . '</b></td></tr>';
			}
			$t_summary = '<table border="0" width="100%" cellpadding="0" cellspacing="1">' . $t_summary . '</table>';
		}

		return $t_summary;
	}

	# --------------------
	# print ALL the RELATIONSHIPS OF A SPECIFIC BUG
	function relationship_get_summary_html_preview( $p_bug_id ) {
		$t_summary = '';
		$t_show_project = false;

		$t_relationship_all = relationship_get_all( $p_bug_id, $t_show_project );
		$t_relationship_all_count = count( $t_relationship_all );

		#prepare the relationships table
		for ( $i = 0 ; $i < $t_relationship_all_count ; $i++ ) {
			$t_summary .= relationship_get_details ( $p_bug_id, $t_relationship_all[$i], true, true, $t_show_project );
		}

		if ( !is_blank( $t_summary ) ) {
			if ( relationship_can_resolve_bug( $p_bug_id ) == false ) {
				$t_summary .= '<tr class="print"><td class="print" colspan=' . (5 + $t_show_project) . '><b>' . lang_get( 'relationship_warning_blocking_bugs_not_resolved' ) . '</b></td></tr>';
			}
			$t_summary = '<table border="0" width="100%" cellpadding="0" cellspacing="1">' . $t_summary . '</table>';
		}

		return $t_summary;
	}

	# --------------------
	# print ALL the RELATIONSHIPS OF A SPECIFIC BUG in text format (used by email_api.php
	function relationship_get_summary_text( $p_bug_id ) {
		$t_email_separator1 = config_get( 'email_separator1' );
		$t_email_separator2 = config_get( 'email_separator2' );

		$t_summary = "";
		$t_show_project = false;

		$t_relationship_all = relationship_get_all( $p_bug_id, $t_show_project );
		$t_relationship_all_count = count( $t_relationship_all );

		#prepare the relationships table
		for ( $i = 0 ; $i < $t_relationship_all_count ; $i++ ) {
			$t_summary .= relationship_get_details ( $p_bug_id, $t_relationship_all[$i], false );
		}

		if ($t_summary != "") {
			$t_summary =
				$t_email_separator1 . "\n" .
				str_pad( lang_get( 'bug_relationships' ), 20 ) .
				str_pad( lang_get( 'id' ), 8 ) .
				lang_get( 'summary' ) . "\n" .
				$t_email_separator2 . "\n" . $t_summary;
		}

		return $t_summary;
	}

 	# --------------------
 	# print HTML relationship listbox
	function relationship_list_box( $p_default_rel_type = -1, $p_select_name = "rel_type", $p_include_any = false) {
?>
<select name="<?php echo $p_select_name?>">
<?php if ($p_include_any) { ?>
<option value="-1" <?php echo ( $p_default_rel_type == -1 ? ' selected' : '' ) ?>>[<?php echo lang_get( 'any' ) ?>]</option>
<?php
    }
?>
<option value="<?php echo BUG_RELATED ?>"<?php echo ( $p_default_rel_type == BUG_RELATED ? ' selected' : '' ) ?>><?php echo lang_get( 'related_to' ) ?></option>
<option value="<?php echo BUG_DEPENDANT ?>"<?php echo ( $p_default_rel_type == BUG_DEPENDANT ? ' selected' : '' ) ?>><?php echo lang_get( 'dependant_on' ) ?></option>
<option value="<?php echo BUG_BLOCKS ?>" <?php echo ( $p_default_rel_type == BUG_BLOCKS ? ' selected' : '' ) ?>><?php echo lang_get( 'blocks' ) ?></option>
<option value="<?php echo BUG_DUPLICATE ?>"<?php echo ( $p_default_rel_type == BUG_DUPLICATE ? ' selected' : '' ) ?>><?php echo lang_get( 'duplicate_of' ) ?></option>
<option value="<?php echo BUG_HAS_DUPLICATE ?>"<?php echo ( $p_default_rel_type == BUG_HAS_DUPLICATE ? ' selected' : '' ) ?>><?php echo lang_get( 'has_duplicate' ) ?></option>
</select>
<?php
	}

 	# --------------------
 	# print HTML relationship listbox
	function relationship_list_box_for_cloned_bug( $p_default_rel_type = -1 ) {
?>
<select name="rel_type">
<option value="-1"<?php echo ( $p_default_rel_type == -1 ? ' selected' : '' ) ?>><?php echo lang_get( 'no_relationship' ) ?></option>
<option value="<?php echo BUG_RELATED ?>"<?php echo ( $p_default_rel_type == BUG_RELATED ? ' selected' : '' ) ?>><?php echo lang_get( 'related_to' ) ?></option>
<option value="<?php echo BUG_DEPENDANT ?>"<?php echo ( $p_default_rel_type == BUG_DEPENDANT ? ' selected' : '' ) ?>><?php echo lang_get( 'dependant_on' ) ?></option>
<option value="<?php echo BUG_BLOCKS ?>" <?php echo ( $p_default_rel_type == BUG_BLOCKS ? ' selected' : '' ) ?>><?php echo lang_get( 'blocks' ) ?></option>
</select>
<?php
	}

 	# --------------------
 	# print HTML relationship form
	function relationship_view_box( $p_bug_id ) {
?>
<br/>

<?php collapse_open( 'relationships' ); ?>
<table class="width100" cellspacing="1">
<tr class="row-2" valign="top">
	<td width="15%" class="form-title" colspan="2">
		<?php
			collapse_icon( 'relationships' );
			echo lang_get( 'bug_relationships' );
			if ( ON == config_get( 'relationship_graph_enable' ) ) {
		?>
		<span class="small"><?php print_bracket_link( 'bug_relationship_graph.php?bug_id=' . $p_bug_id . '&amp;graph=relation', lang_get( 'relation_graph' ) ) ?></span>
		<span class="small"><?php print_bracket_link( 'bug_relationship_graph.php?bug_id=' . $p_bug_id . '&amp;graph=dependency', lang_get( 'dependency_graph' ) ) ?></span>
		<?php
			}
		?>
	</td>
</tr>
<?php
		# bug not read-only and user authenticated
		if ( !bug_is_readonly( $p_bug_id ) ) {

			# user access level at least updater
			if ( access_has_bug_level( config_get( 'update_bug_threshold' ), $p_bug_id ) ) {
?>
<tr class="row-1">
	<td class="category"><?php echo lang_get( 'add_new_relationship' ) ?></td>
	<td><?php echo lang_get( 'this_bug' ) ?>
		<form method="POST" action="bug_relationship_add.php">
		<input type="hidden" name="src_bug_id" value="<?php echo $p_bug_id ?>" size="4" />
		<?php relationship_list_box( -1 ) ?>
		<input type="text" name="dest_bug_id" value="" maxlength="7" />
		<input type="submit" name="add_relationship" class="button" value="<?php echo lang_get( 'add_new_relationship_button' ) ?>" />
		</form>
	</td></tr>
<?php
			}
		}
?>
<tr>
	<td colspan="2"><?php echo relationship_get_summary_html( $p_bug_id ) ?></td>
</tr>
</table>

<?php collapse_closed( 'relationships' ); ?>
<table class="width100" cellspacing="1">
<tr>
	<td class="form-title">
		<?php
			collapse_icon( 'relationships' );
			echo lang_get( 'bug_relationships' );
		?>
	</td>
</tr>
</table>

<?php
		collapse_end( 'relationships' );
	}
?>
