praiadeseselle/site/modules/pw-admin-custom-pages/ProcessAdminCustomPages.module

<?php

/*
	* Admin Custom Pages Module v 1.0.5
	* Create custom admin pages without building a Process Module
	*
	* @author Diogo Oliveira
	*
	* @modified Nico Knoll
	*
	* ProcessWire 3.x
	* Copyright (C) 2011 by Ryan Cramer
	* Licensed under GNU/GPL v2, see LICENSE.TXT
	*
	* http://www.processwire.com
	*
*/

class ProcessAdminCustomPages extends Process {
	
	static public function getModuleInfo() {
		return array(
			'title'   => 'Admin Custom Pages',
			'summary' => __('Create custom admin pages without building a Process Module'),
			'version' => 111,
			'author'  => 'Diogo Oliveira',
			'permission' => 'page-view',
			'installs' => array('FieldtypeAdminCustomPagesSelect'),
			'requires' => array('FieldtypeAdminCustomPagesSelect')
		);
	}

	public function init() {

		parent::init();

		// load script and style files for this page (expects a ACP_scripts_and_styles field with one url per line)
		if ($this->page->ACP_scripts_and_styles != "") {

			// get one url for each line of the field
			$files = explode("\n", $this->page->ACP_scripts_and_styles);

			foreach ($files as $f) {

				// get the file extension
				$extension = trim(substr(strrchr($f,'.'),1));
				
				// check if url is absolute, if not concatenate it with the site root url
				if (strpos($f, "http://") === false) {
					$f = $this->config->urls->root . $f;
				}

				// load the correct type of file
				switch ($extension) {

					case "js":
						$this->config->scripts->add($f);
						break;

					case "css":
						$this->config->styles->add($f);
						break;
				}
			}
		}
	}

	public function ___execute() {

		$template_file = wire('config')->paths->root . $this->page->ACP_template;

		if (file_exists($template_file)) {

			// only works with dev version of ProcessWire May 8 2013
			return $this->page->render($template_file);

		} elseif ($this->page->child->id) {

			// for the current stable version use this method
			// 'include=hidden' added by suggestion of Macrura and kongondo at the forum
			// http://processwire.com/talk/topic/3474-admin-custom-pages-module/?p=38304
			return $this->page->child('include=hidden')->render();

		} else {

			return $this->error(__("You have to assign a template file to this 'Admin Custom Page'.")); 

		}

	}
	
	// install method created by Pete (https://github.com/Notanotherdotcom)
	public function ___install() {
		
		// Check if PW 2.4 or higher is installed
		if(ProcessWire::versionMajor == 2 && ProcessWire::versionMinor < 4) {
			throw new WireException(__("This module requires ProcessWire 2.4 or newer"));
		}		
		
		// Check for existence of the field below, throw a message if it already exists
		if($this->fields->get('ACP_scripts_and_styles') == NULL) {
			// If it doesn't exist then carry on and create it
			$field = new Field();
			$field->type = $this->modules->get("FieldtypeTextarea");
			$field->name = 'ACP_scripts_and_styles';
			$field->label = __('Scripts and styles for admin pages');
			$field->description = __('Add the .js and .css URLs in this field textarea, one in each line. can be absolute or relative (relative is assumed from the site root eg: site/templates/styles/my.css)');
			$field->save();
			$this->message(__("Added field 'ACP_scripts_and_styles'. Add this field to the page template of your custom admin pages when needed."));
		}
		
		
		if($this->fields->get('ACP_template') == NULL) {
			// If it doesn't exist then carry on and create it
			$field = new Field();
			$field->type = $this->modules->get("FieldtypeAdminCustomPagesSelect");
			$field->name = 'ACP_template';
			$field->label = 'Template';
			$field->description = __('Select the template which should get rendered. Templates have to be in /site/templates/.');
			$field->save();
		
			// Add field to admin template
			$adminTemplate = $this->templates->get('admin');
			$adminTemplate->fields->add($field);
			$adminTemplate->fields->save();
			
			$this->message(__("Added field 'ACP_template' to admin."));
		}
		
	}

	
	public function ___uninstall() {
		// Remove the select field
		$adminTemplate = $this->templates->get('admin');
		if($adminTemplate->fields->get('ACP_template')) {
			$adminTemplate->fields->remove($adminTemplate->fields->get('ACP_template'));
			$adminTemplate->fields->save();
		}
		
		// Remove ACP_template
		if($this->fields->get('ACP_template')) {
			$field = $this->fields->get('ACP_template');
			$this->fields->delete($field);
		}
		
		// Remove ACP_scripts_and_styles
		if($this->fields->get('ACP_scripts_and_styles')) {
			$field = $this->fields->get('ACP_scripts_and_styles');
			$this->fields->delete($field);
		}
				
	}
    
}