moodle-block_mytreestudyplan/edit_form.php

<?php

require_once($CFG->dirroot.'/blocks/gradelevel/lib.php');

class block_gradelevel_edit_form extends block_edit_form {


    protected function specific_definition($mform) {
		global $CFG;
		// retrieve levelset
		$levelset = $this->block->levelset;
		
        // Section header title according to language file.
        $mform->addElement('header', 'config_header', get_string('blocksettings', 'block'));

        // A sample string variable with a default value.
        $mform->addElement('text', 'levelset_name', get_string('levelset_name', 'block_gradelevel'));
 
		$icon = $levelset->getIcon();
 		if(strncmp($icon,"data: ",6) != 0)
		{
			$icon = $CFG->wwwroot.$icon;
		}
		
		$icon_title =  get_string('levelset_icon_cur', 'block_gradelevel');
		$mform->addElement('html',"<div class='form-group row fitem'><div class='col-md-3'>{$icon_title}</div><div class='col-md-9'><figure class='levelset_icon'><img src='{$icon}' /></figure></div></div>");

        // A sample string variable with a default value.
        $mform->addElement('filepicker', 'levelset_icon', get_string('levelset_icon_new', 'block_gradelevel'), null,
			array('maxbytes' => $maxbytes, 'accepted_types' => array('.png', '.svg')));

        $mform->addElement('header', 'config_header', get_string('levelset_levels', 'block_gradelevel'));
		$mform->addElement('html',print block_gradelevel_managelevelservice::render_leveltable(0));

    }

	public function set_data($defaults)
	{
		// retrieve levelset
		$levelset = $this->block->levelset;

		$defaults->levelset_name = $levelset->getName();

		$defaults->levelset_icon = $levelset->getIcon();

		parent::set_data($defaults);
	}


	public function get_data()
	{
		$data = parent::get_data();
	
		if(isset($data))
		{
			$this->save_data($data);
		}

		return $data;
	}

	protected function save_data($data)
	{
		// retrieve levelset
		$levelset = $this->block->levelset;

		$this->debug("data: ".print_r($data,true));


		if(isset($data->levelset_name)){
			$levelset->setName($data->levelset_name);
		}

		if(isset($data->levelset_icon))
		{
			$filename = $this->get_new_filename('levelset_icon');
			$contents = $this->get_file_content('levelset_icon');

			$imageData = base64_encode($contents);

			$pi = pathinfo($filename);
			if($pi['extension'] == 'svg')
			{
				$mime = "image/svg+xml";
			}
			else if($pi['extension'] == 'png')
			{
				$mime = "image/png";
			}
			else 
			{
				$mime = "binary/octet-stream"; // no idea what it is
			}


			$dataSrc = 'data: '.$mime.';base64,'.$imageData;

			$levelset->setIcon($dataSrc);
		}

		$this->debug("levelset: ".print_r($levelset,true));

		$levelset->save_data();	
	}

	

	private function debug($msg)
	{
		error_log($msg, 3, '/tmp/moodledevlog.log');
	}
}