Source for file functions_relationships.php

<?php
function relate_new_object( $constraints = NULL ) {
    
    //responds to the selection of the "new..." option in a new relationship form
    if( $_SESSION['new_object'] ) {
        //if related objects are having new objects related to them
        $previous = unserialize( $_SESSION['new_object']['previousReferrers'] );
        if( is_array($previous) ) {
            array_push( $previous, $_SESSION['new_object']['referrer'] );
            $holder = serialize( $previous );
        } else {
            $holder = serialize( array( $_SESSION['new_object']['referrer'] ) );
        }
        
    }
    
    //transfer POST data to the SESSION array and format redirect string
    $_SESSION['new_object'] = array();
    $_SESSION['new_object']['referrer'] = $_POST['referrer']; 
    $_SESSION['new_object']['object'] = $_POST['object'];
    if( $holder ) { $_SESSION['new_object']['previousReferrers'] = $holder; }
        
    $redirectString = "Location: http://".$_SERVER['HTTP_HOST'];
    $redirectString .= dirname($_SERVER['PHP_SELF']);
    
    //bifurcate processing for new objects or embeds
    if( !$_POST['embed_type'] ) {
        $_SESSION['new_object']['target'] = $_POST['target'];
        $_SESSION['new_object']['constraints'] = serialize($constraints);
        $_SESSION['new_object']['typeID'] = $_POST['relationship_type'];
        
        //test for single constraint with defined object type and redirect to new page if found
        if( count($constraints) == 1 ) {
            $constraint = get_object( reset($constraints) );
            if( $typeTests = $constraint->get_attribute( 'object_constraints' ) ) {
                foreach( $typeTests as $typeTest ) {
                    if( in_array( 'type', $typeTest ) ) {
                        $redirectString = 'Location: '.echo_url( true, false );
                        $redirectString .= '?object_type='.$typeTest['value'].'&object=*new*';
                    }
                }
            }
        } else {
        //if not found redirect to new_object page for querying user about what type of object to create
            $redirectString .= "/new_object.php";
        }
    } else {
        $_SESSION['new_object']['embed_type'] = $_POST['embed_type'];
        $_SESSION['new_object']['embed_attribute'] = $_POST['embed_attribute'];
 
        $redirectString .= "/new_embed.php";
    }    
    
    //redirect and flush header
    header( $redirectString );
 
    ob_end_flush();
}
 
function relate_new_object_content() {
    //echos content for selecting which type of object to create
    $returnString;
    $constraints = unserialize( $_SESSION['new_object']['constraints'] );
    
    $returnString .= '
        <form method="post">
        <p>select the best description of the new object:<br>
        <select name="constraint">
            <option>select...</option>
    ';
    foreach ($constraints as $constraint) {
        $currentConstraint = get_constraint( $constraint );
 
        if( $currentConstraint['object_constraints'][0]['attribute'] == "type" ) {
            $returnString .= '<option value="'.$constraint.'">'.$currentConstraint['name'].'</option>';
        }
    }
    $returnString .= '
        </select>
        <p>...or select what type of object to create<br>
        <select name="object_type" onchange="this.form.submit();">
            <option>select...</option>
    ';
    foreach( get_object_types() as $objectType ) {
        $returnString .= '
            <option value="'.$objectType['name'].'">'.$objectType['name'].'</option>
        ';
    }
    $returnString .= '
        </select>
        </form>
    ';
    
    return $returnString;
}
/*
function get_relationships_content( $objectID = NULL ) {
    //outputs the table rows with form content for adding or editing a relationship
    $returnString;
    //for each possible relationship type...
    $relationships = get_relationships( $objectID );
    $relationshipTypes = get_allowed_relationship_types( $objectID ); 
 
    if( count($relationshipTypes) ) {
        $returnString .= '<table width="100%">';
    }
 
    for($i=0;$i<count($relationshipTypes);$i++) {
        //output any defined relationships
        if( ($i+1) % 2 ) {
            $returnString .= '<tr>';
        }
        $relatedArray = array();
        $relationshipType = core_get_relationship_type($relationshipTypes[$i]['relationship_typeID']);
        $relationshipDirection = $relationshipTypes[$i]['direction'];
        $relationships = get_relationships( $objectID, $relationshipType );
 
        $returnString .= '
            <td width="45%" style="border-style:none;"><div>
                <a name="relationship_type_'.$relationshipType['id'].'">
                <table width="100%">
                <tr>
                    <td colspan="2" bgcolor="#eeeeee" style="text-align:right;">'.$relationshipType['name'].'</td>
                </tr>
        ';
        
        for($j=0;$j<count($relationships);$j++) {
            $relationship = $relationships[$j];
            if( $relationship['typeID'] == $relationshipType['id'] ) {
                $related = ($relationship['primaryID'] == $objectID) ? $relationship['secondaryID'] : $relationship['primaryID'];
                $returnString .= '<tr><td>'.get_object_index($related).'</td>';
                if( allowed( "modify relationships" ) ) {
                    $returnString .= '<td bgcolor="#F2B5B3"><a href="system_management.php?p='.$_GET['p'].'&page='.$_GET['page'].'&object='.$objectID.'&action=delete_relationship&relationship='.$relationship['id'].'" '.mouseover( "#fff", "#B90000").' style="color:#fff;">delete</a></td></tr>';
                }
                array_push($relatedArray, $related);
            }
        }
        if( !count($relationships) ) {
            $returnString .= '<tr><td>none defined</td></tr>'; 
        }
        
        //insert the select box for new relationships
        if( allowed( "modify relationships" ) ) {
            $allowedArray = array();
            for($j=0;$j<count($relationshipTypes[$i]['type_sets']);$j++){
                $allowedArray = array_merge( $allowedArray, get_constrained_objects( $relationshipTypes[$i]['type_sets'][$j][ ($relationshipDirection == 'foreward' ? 'secondary_constraintID' : 'primary_constraintID' ) ] ) );
            }
            
            $optionArray = array_diff( array_unique($allowedArray), $relatedArray );
            $returnString .= '
                <tr><td>
                    <form method="post" action="'.echo_url(true).'#relationship_type_'.$relationshipType['id'].'">
                    <input type="hidden" name="action" value="new_relationship">
                    <input type="hidden" name="direction" value="'.$relationshipDirection.'">
                    <input type="hidden" name="relationship_type" value="'.$relationshipType['id'].'">
                    <input type="hidden" name="referrer" value="';echo_url();echo'">
                    <input type="hidden" name="direction" value="'.$relationshipDirection.'">
                    <input type="hidden" name="object" value="'.$objectID.'">
                    <select name="related" onchange="this.form.submit();">
                        <option>add...</option>
            ';
            for(reset($optionArray);current($optionArray);next($optionArray)) {
                $returnString .= '<option value='.current($optionArray).'>'.get_object_index(current($optionArray)).'</option>';
            }
            //this option value needs to specify the possible constraints the given relationship type has defined
            $returnString .= '
                        <option value="*new*?';for($k=0;$k<count($relationshipTypes[$i]['type_sets']);$k++){echo ($k?"&":"").$relationshipTypes[$i]['type_sets'][$k][($relationshipDirection == 'foreward' ? 'secondary_constraintID' : 'primary_constraintID' )];};echo'">new...</option>
                    </select>
                    </form>
                    </td></tr>
            ';
        }
        $returnString .= '
            <tr><td colspan="2" bgcolor="#eeeeee" style="text-align:right;">'.$relationshipType['name'].'</td></tr>
            </table></div></td>&nbsp;
        ';
        if( $i % 2 ) {
            $returnString .= '</tr><tr><td>&nbsp;</td></tr>';
        }    
    }
    if( count($relationshipTypes) ) {
        $returnString .= '</table>';
    }
    
    return $returnString;
}
 
function get_relationships_noform_content( $object, $relationship ) {
    //echos relationships without editing capability
    $relatedIndex = ( $relationship['primaryID']==$object ? $relationship['secondaryID'] : $relationship['primaryID'] );
    return '
        <tr>
            <td bgcolor="#eeeeee">'.core_get_relationship_type($relationship['typeID']).'</td>
            <td>'.get_object_index($relatedIndex).'</td>
            <td><a href="system_management.php?p='.$_GET['p'].'&object='.$object.'&action=edit&relationship='.$relationship['id'].'" '.mouseover().'>edit</a></td>
            <td bgcolor="#F2B5B3"><a href="system_management.php?p='.$_GET['p'].'&object='.$object.'$action=delete&relationship='.$relationship['id'].'" '.mouseover( "#fff", "#B90000").' style="color:#fff;">delete</a></td>
        <tr>
    ';
}*/
?>