/**
 * A Sitemap controller that automatically generates sitemap.xml for a grails website.
 *
 * Be sure to notice the controllerNamesToExclude and actionsToExclude lists
 *
 * References:
 * http://stackoverflow.com/questions/3748125/xml-sitemap-in-grails
 * http://stackoverflow.com/questions/2956294/reading-out-all-actions-in-a-grails-controller
 *
 */
package com.muhive
import groovy.xml.MarkupBuilder
import java.lang.reflect.Method
import grails.web.Action

class SitemapController {

    def grailsApplication

    /**
     * If you want to exclude any controllers in the sitemap, especially Error controllers and services etc, include them in this array
     */
    def controllerNamesToExclude = [ 'sitemap', 'error']

    /**
     * If you want to certain actions excluded, include them in this array. All actions with this name will be ignored
     */
    def actionsToExclude = ['submitForm']

    def index = {
        StringWriter writer = new StringWriter()
        MarkupBuilder mkp = new MarkupBuilder(writer)
        mkp.mkp.xmlDeclaration(version: "1.0", encoding: "UTF-8")
            mkp.urlset(xmlns: "http://www.sitemaps.org/schemas/sitemap/0.9",
                    'xmlns:xsi': "http://www.w3.org/2001/XMLSchema-instance",
                    'xsi:schemaLocation': "http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd") {
                
                grailsApplication.controllerClasses.each { controller ->
                    Class controllerClass = controller.clazz

                    // skip controllers in plugins
                    if (controllerClass.name.startsWith('com.muhive') && !controllerNamesToExclude.contains(controller.logicalPropertyName)) {
                        String logicalControllerName = controller.logicalPropertyName

                        // get the actions defined as methods (Grails 2)
                        controllerClass.methods.each { Method method ->

                            if (method.getAnnotation(Action) && !actionsToExclude.contains(method.name)) {
                                
                                mkp.url {
                                    loc(g.createLink(absolute: true, controller: logicalControllerName, action: method.name))
                                    changefreq('hourly')
                                    priority(0.8)
                                }                                
                            }
                        }
                    }
                }
            }
        render(text: writer.toString(),contentType: "text/xml", encoding: "UTF-8")
    }
}