praiadeseselle/wire/modules/Process/ProcessPermission/ProcessPermission.module

<?php namespace ProcessWire;

/**
 * ProcessWire Permission Process
 *
 * For more details about how Process modules work, please see: 
 * /wire/core/Process.php 
 * 
 * ProcessWire 3.x, Copyright 2016 by Ryan Cramer
 * https://processwire.com
 *
 */

class ProcessPermission extends ProcessPageType {

	static public function getModuleInfo() {
		return array(
			'title' => __('Permissions', __FILE__), // getModuleInfo title
			'version' => 101, 
			'summary' => __('Manage system permissions', __FILE__), // getModuleInfo summary
			'permanent' => true, 
			'permission' => 'permission-admin', // add this permission if you want this Process available for roles other than Superuser
			'icon' => 'gear', 
			'useNavJSON' => true,
			); 
	}

	/**
	 * Get the optional permissions form, or null if there are no optional permissions to install
	 * 
	 * @return InputfieldForm|null
	 * 
	 */
	protected function getOptionalPermissionsForm() {
		
		$form = $this->wire('modules')->get('InputfieldForm');
		$form->action = '../install-permissions/';
		$form->method = 'post';
		$form->attr('id', 'ProcessPermissionAddSystem');
		
		$fieldset = $this->wire('modules')->get('InputfieldFieldset');
		$fieldset->label = $this->_('Install predefined system permissions');
		$fieldset->collapsed = Inputfield::collapsedYes;
		$fieldset->icon = 'gear';
		
		$form->add($fieldset);

		$optionalPermissions = $this->wire('permissions')->getOptionalPermissions();
		
		if(count($optionalPermissions)) {
			$reducerPermissions = $this->wire('permissions')->getReducerPermissions();
			
			$f = $this->wire('modules')->get('InputfieldCheckboxes');
			$f->name = 'install_permissions';
			$f->label = $this->_('Check the box next to each optional permission you would like to install.');
			$f->table = true;
			
			
			foreach($optionalPermissions as $name => $label) {
				$displayName = $name;
				if(isset($reducerPermissions[$name])) $displayName .= '*';
				$f->addOption($name, "$displayName|$label");
			}
			
			$f->notes = '*' . 
				$this->_('When installed, user must have this permission to complete described task.') . ' ' . 
				$this->_('When NOT installed, permission is assumed if user already has edit access to described resource.') . ' ' . 
				$this->_('As a result, if installed, this permission may remove existing access until it is assigned to roles.');
			
			$fieldset->add($f);

			$button = $this->wire('modules')->get('InputfieldSubmit');
			$button->name = 'submit_install_permissions';
			$button->value = $this->_('Install');
			
			$fieldset->add($button);
			
			return $form;
			
		} else {
			return null;
			
		}
	}
	
	/**
	 * Get the page editor
	 *
	 * @param string $moduleName One of 'ProcessPageEdit' or 'ProcessPageAdd' (or other that extends)
	 * @return ProcessPageEdit|ProcessPageAdd|WirePageEditor
	 * @throws WireException If requested editor moduleName not found
	 *
	 */
	protected function getEditor($moduleName) {
		$editor = parent::getEditor($moduleName);
		if($editor == 'ProcessPageAdd') $editor->set('noAutoPublish', true);
		return $editor;
	}
	
	public function ___executeAdd() {
		
		// hide the title field, since it is counterproductive when adding a new permission
		$template = $this->wire('templates')->get('permission');
		$titleField = $template->fieldgroup->getField('title');
		$titleCollapsed = $titleField->collapsed;
		$titleField->collapsed = Inputfield::collapsedYesLocked;
		
		$out = parent::___executeAdd();
		$titleField->collapsed = $titleCollapsed; // restore
			
		$form = $this->getOptionalPermissionsForm();
		
		if($form) {
			$fieldset = $this->wire(new InputfieldWrapper());
			$f = $this->wire('modules')->get('InputfieldMarkup');
			$f->attr('id', 'ProcessPermissionAddCustom');
			$f->value = $out;
			$f->label = $this->_('Add a new custom permission');
			$f->icon = 'plus-square';
			$fieldset->add($f);
			$moduleInfo = self::getModuleInfo();
			$out = "<h2>$moduleInfo[title]</h2>" . $form->render() . $fieldset->render();
		}
		
		return $out; 
	}
	
	protected function ___executeInstallPermissions() {

		$user = $this->wire('user');
		$languages = $this->wire('languages');
		$userLanguage = null;
		if($languages) {
			$userLanguage = $user->language;
			$user->language = $languages->getDefault(); 
		}
		
		$installPermissions = $this->wire('input')->post->array('install_permissions', 'pageName');
		$optionalPermissions = $this->wire('permissions')->getOptionalPermissions();
		
		foreach($installPermissions as $name) {
			if(!isset($optionalPermissions[$name])) continue;
			if($this->wire('permissions')->has($name)) continue; // already installed
			$permission = $this->wire('permissions')->add($name);
			if(!$permission->id) continue;
			$permission->title = $optionalPermissions[$name];
			if($languages && $permission->title instanceof LanguagesValueInterface) {
				// if the permission titles have been translated, ensure that the translation goes in for each language
				foreach($languages as $language) {
					if($language->isDefault()) continue;
					$a = $this->wire('permissions')->getOptionalPermissions();
					if($a[$name] == $optionalPermissions[$name]) continue;
					$permission->title->setLanguageValue($language, $a[$name]);
				}
			}
			$permission->save();
			$this->message(sprintf($this->_('Added optional permission: %s'), $name));	
		}

		if($userLanguage) $user->language = $userLanguage;
		
		$this->wire('session')->redirect('../');
	}
	
}