<?php
/**
* Tool_JIT
*
* @package Tool
* @since 09.02.2009
* @version 0.1
* @author Thomas Schäfer
*
* @desc build a json object for the JIT Lib
*
* @see http://blog.thejit.org/javascript-information-visualization-toolkit-jit/
* @example
* <code>
* $node = Tool_JIT::getInstance();
* $node ->set("190","Pearl Jam")
->addChild(
Tool_JIT::getInstance()
->set("306208","Pearl Jam & Cypress Hill")
->add("Pearl Jam","collaboration")
->addChild(
Tool_JIT::getInstance()
->set("84","Cypress Hill")
->add("Pearl Jam & Cypress Hill","collaboration")
->addChild()
)
);
echo $node->render();
</code>
*/
class Tool_JIT {
/**
* var static $iCounter
* @desc used for id attachment
*/
private static $iCounter = 0;
/**
* @var node
*/
private static $instance;
/**
* @var $node
*/
private $node;
public function __construct(){}
/**
* getInstance
*/
public function getInstance(){
if(empty(self::$instance)) {
return new Tool_JIT;
}
return self::$instance;
}
/*
* set
* @desc set id and node caption
* @param string id
* @param string $caption
* @return self
*/
public function set($id, $caption) {
$this->node = new stdClass;
$this->node->id = $id . "_". Tool_JIT::$iCounter;
$this->node->name = $caption;
$this->node->data = array();
Tool_JIT::$iCounter++;
return $this;
}
/**
* add
* @desc add a key/value pair
* @param string $key
* @param mixed $value
* @return self
*/
public function add($key,$value) {
if(empty($this->node->data) or !array_key_exists("data",$this->node)) {
$this->node->data = array();
}
$data = new stdClass;
$data->key = $key;
$data->value = $value;
$this->node->data[] = $data;
return $this;
}
/**
* to
* @desc connect a node with its parent
* @param string $strNodeTo
* @param integer $weight
* @return self
*/
public function to($strNodeTo, $weight) {
if(empty($this->node->adjacencies) or !array_key_exists("adjacencies",$this->node)) {
$this->node->adjacencies = array();
}
$nodeTo = new stdClass;
$nodeTo->nodeTo = $strNodeTo;
$nodeTo->data = array();
$nodeToData = new stdClass;
$nodeToData->weight = 3;
$nodeTo->data[] = $nodeToData;
$this->node->adjacencies[] = $nodeTo;
return $this;
}
/**
* addChild
* @desc add a new node as child
* @param Tool_JIT $node
* @return self
*/
public function addChild($node = null) {
if(is_null($node) or $node instanceof Tool_JIT)
{
if(empty($this->node->children) or !array_key_exists("children",$this->node)) {
$this->node->children = array();
}
$this->node->children[] = $node;
}
return $this;
}
/**
* get
* @desc returns the data tree
* @return mixed
*/
public function get() {
return $this->node;
}
/**
* render
* @desc renders the Tool_JIT-Object as JSON
* @return string
*/
public function render() {
return Tool_JIT::toJSON($this->get());
}
/**
* toJSON
* @param mixed $data
* @param bool $escape
* return $mixed
*/
public static function toJSON($data=null, $escape=true)
{
if (is_null($data)){
return '';
}
if ($data === false){
return 'false';
}
if ($data === true){
return 'true';
}
if (is_scalar($data)) {
$data = addslashes($data);
$data = preg_replace('{(</)(script)}i', "$1'+'$2", $data);
if(
empty($escape) or
preg_match("/^([0-9]{1,14})$/",$data) or
preg_match("/^(\+?((([0-9]+(\.)?)|([0-9]*\.[0-9]+))([eE][+-]?[0-9]+)?))$/",$data) or
is_bool($data)
) {
$data = stripslashes($data);
$data = str_replace("\n", "", $data);
$data = str_replace("\r", "", $data);
$data = str_replace("\t", "", $data);
return trim($data);
}else{
$data = str_replace("\n", "", $data);
$data = str_replace("\r", "", $data);
$data = str_replace("\t", "", $data);
return "\"".trim($data)."\"";
}
}
$isList = true;
for ($i=0, reset($data); $i<count($data); $i++, next($data)){
if (key($data) !== $i) {
$isList = false; break;
}
}
$result = array();
if ($isList) {
foreach ($data as $v){
if((is_scalar($v) and (
preg_match("/^([0-9]{1,14})$/",$v)) or
is_bool($v)
)) {
$result[] = Tool_JIT::toJSON($v,false);
} else {
if($v instanceof Tool_JIT)
$result[] = Tool_JIT::toJSON($v->get());
else
$result[] = Tool_JIT::toJSON($v);
}
}
return '[' . join(',', $result) . ']';
} else {
foreach ($data as $key => $value){
$result[] = Tool_JIT::toJSON($key) . ':' . Tool_JIT::toJSON($value);
}
return '{' . join(',', $result) . '}';
}
}
}
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