DaPortal

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<?php //$Id$

//This file is part of DeforaOS Web DaPortal

//This program is free software: you can redistribute it and/or modify

//it under the terms of the GNU General Public License as published by

//the Free Software Foundation, version 3 of the License.

//This program is distributed in the hope that it will be useful,

//but WITHOUT ANY WARRANTY; without even the implied warranty of

//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

//GNU General Public License for more details.

//You should have received a copy of the GNU General Public License

//along with this program. If not, see <http://www.gnu.org/licenses/>.

//JSONFormat

class JSONFormat extends PlainFormat

{

//protected

//properties

protected $print = FALSE;

protected $id;

//methods

//essential

//JSONFormat::match

protected function match(Engine $engine, $type = FALSE)

{

if(!function_exists('json_encode'))

return 0;

switch($type)

{

case 'application/json':

return 100;

default:

return 0;

}

//JSONFormat::attach

protected function attach(Engine $engine, $type = FALSE)

{

}

//public

//methods

//rendering

//JSONFormat::render

public function render(Engine $engine, PageElement $page,

$filename = FALSE)

{

//FIXME ignore filename for the moment

if($page === FALSE)

$page = new Page;

$this->id = 1;

$this->engine = $engine;

$this->separator = '';

$this->_print('{', TRUE);

$this->renderElement($page);

$this->_print('}', TRUE);

$this->engine = FALSE;

}

//protected

//methods

//printing

//JSONFormat::print

protected function _print($string, $force = FALSE)

{

if($force || $this->print)

print($string);

}

//JSONFormat::printScalar

protected function printScalar($variable, $force = FALSE)

{

if($force || $this->print)

//FIXME report errors

if(($res = json_encode($variable)) !== FALSE)

print($res);

}

//rendering

//JSONFormat::renderElement

protected function renderElement(PageElement $e)

{

switch($e->getType())

{

case 'treeview':

return $this->renderTreeview($e);

default:

return parent::renderElement($e);

}

//JSONFormat::renderTreeview

protected function renderTreeview(PageElement $e)

{

$this->print = TRUE;

if(($columns = $e->get('columns')) === FALSE)

$columns = array('title' => 'Title');

$keys = array_keys($columns);

if(count($keys) == 0)

return;

$this->printScalar('rows'.$this->id++);

$this->_print(':[');

$sep1 = '';

$children = $e->getChildren($e);

foreach($children as $c)

{

if($c->getType() != 'row')

continue;

$this->_print("$sep1\n\t{");

$sep1 = ',';

//print each column of the current row

$sep2 = '';

foreach($keys as $k)

{

$this->_print("$sep2\n\t\t");

$this->printScalar($k);

$this->_print(':');

$sep2 = ',';

if(($e = $c->get($k)) !== FALSE)

{

if(is_scalar($e))

$this->printScalar($e);

else

$this->renderElement($e);

}

$this->_print("\n\t}");

}

$this->_print("\n]");

$this->print = FALSE;

}