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<?php

/* Here are the database definitions (for Solid) that i use in this code.

 * It should not be hard to adapt it to another database.

 */

/*

CREATE TABLE dirent_types (

 id INTEGER NOT NULL,

 icon VARCHAR(50),

 name VARCHAR(50),

 PRIMARY KEY(id)

);

INSERT INTO dirent_types VALUES(1, 'folderclosed', 'Directory');

INSERT INTO dirent_types VALUES(2, 'document', 'File');

CREATE TABLE directory (

 id INTEGER NOT NULL,

 parent INTEGER REFERENCES directory(id),

 name VARCHAR(200),

 icon VARCHAR(50),

 type INTEGER REFERENCES dirent_types(id),

 url VARCHAR(200),

 PRIMARY KEY(id)

);

DROP INDEX directory_idx;

CREATE UNIQUE INDEX directory_idx ON directory(parent, name);

CREATE SEQUENCE dirent_id;

"CREATE PROCEDURE insert_dir_entry

 (name VARCHAR, parent INTEGER, type INTEGER)

 RETURNS(id INTEGER)

BEGIN

 EXEC SQL WHENEVER SQLERROR ABORT;

 EXEC SEQUENCE dirent_id.NEXT INTO id;

 EXEC SQL PREPARE c_insert

 INSERT INTO directory

 (id, parent, type, name)

 VALUES(?, ?, ?, ?);

 EXEC SQL EXECUTE c_insert USING (id, parent, type, name);

 EXEC SQL DROP c_insert;

END";

CALL insert_dir_entry('My Computer', NULL, 1);

CALL insert_dir_entry('Network Neighbourhood', NULL, 1);

CALL insert_dir_entry('lucifer.guardian.no', 2, 1);

CALL insert_dir_entry('rafael.guardian.no', 2, 1);

CALL insert_dir_entry('uriel.guardian.no', 2, 1);

CALL insert_dir_entry('Control Panel', NULL, 1);

CALL insert_dir_entry('Services', 6, 1);

CALL insert_dir_entry('Apache', 7, 2);

CALL insert_dir_entry('Solid Server 2.2', 7, 2);

*/

function icon($icon, $name = '', $width = 0, $height = 0) {

 global $DOCUMENT_ROOT;

 $icon_loc = '/pics/menu';

 $file = "$DOCUMENT_ROOT$icon_loc/$icon.gif";

 if (!$width || !$height) {

 $iconinfo = getimagesize($file);

 if (!$width) {

 $width = $iconinfo[0];

 }

 if (!$height) {

 $height = $iconinfo[1];

 }

 }

 printf( '<img%s border=0 align=top src=http://www.zzvips.com/article/"/pics/menu/%s.gif" '.

 'width="%d" height="%d">', $name ? " name=\"$name\"" : '',

 $icon, $width, $height);

}

function display_directory($parent,$showdepth=0,$ancestors=false){

 global $child_nodes, $node_data, $last_child;

 reset($child_nodes[$parent]);

 $size = sizeof($child_nodes[$parent]);

 $lastindex = $size - 1;

 if (!$ancestors) {

 $ancestors = array();

 }

 $depth = sizeof($ancestors);

 printf( '<div id="node_%d" class="dirEntry" visibility="%s">',

 $parent, $showdepth > 0 ? 'show' : 'hide');

 while (list($index, $node) = each($child_nodes[$parent])) {

 for ($i = 0; $i < $depth; $i++) {

 $up_parent = (int)$node_data[$ancestors[$i]][ 'parent'];

 $last_node_on_generation = $last_child[$up_parent];

 $uptree_node_on_generation = $ancestors[$i];

 if ($last_node_on_generation == $uptree_node_on_generation) {

 icon( "blank");

 } else {

 icon( "line");

 }

 }

 if ($child_nodes[$node]) {

 // has children, i.e. it is a folder

 $conn_icon = "plus";

 $expand = true;

 } else {

 $conn_icon = "join";

 $expand = false;

 }

 if ($index == $lastindex) {

 $conn_icon .= "bottom";

 } elseif ($depth == 0 && $index == 0) {

 $conn_icon .= "top";

 }

 if ($expand) {

 printf( "<a href=\"javascript:document.layers['node_%d'].visibility='show'\">", $node);

 }

 icon($conn_icon, "connImg_$node");

 if ($expand) {

 print( "</a>");

 }

 $icon = $node_data[$node][ 'icon'];

 if (!$icon) {

 $type = $node_data[$node][ 'type'];

 $icon = $GLOBALS[ 'dirent_icons'][$type];

 }

 icon($icon, "nodeImg_$node");

 $name = $node_data[$node][ 'name'];

 printf( '?<font size="%d">%s</font><br%c>', -1, $name, 10);

 if ($child_nodes[$node]) {

 $newdepth = $showdepth;

 if ($newdepth > 0) {

 $newdepth--;

 }

 $new_ancestors = $ancestors;

 $new_ancestors[] = $node;

 display_directory($node, $newdepth, $new_ancestors);

 }

 }

 print( "</div\n>");

}

function setup_directory($parent, $maxdepth)

{

 global $dirent_icons, $child_nodes, $node_data, $last_child;

 $dirent_icons = sql_assoc('SELECT id,icon FROM dirent_types');

 $query = 'SELECT id,parent,type,icon,name '.

 'FROM directory '.

 'ORDER BY parent,name';

 $child_nodes = array();

 $node_data = array();

 $res = sql($query);

 while (list($id,$parent,$type,$icon,$name)=db_fetch_row($res)){

 $child_nodes[(int)$parent][] = $id;

 $node_data[$id] = array( 'id' => $id,

 'parent' => $parent,

 'type' => $type,

 'icon' => $icon,

 'name' => $name);

 $last_child[(int)$parent] = $id;

 }

}

?>