From b6d288f422846ea81a5702eab6eccdd217382284 Mon Sep 17 00:00:00 2001
From: Matt Mo <matt@montoyatech.com>
Date: Wed, 11 Aug 2021 10:45:06 -0700
Subject: [PATCH] Added more docs. Router now has a data option that is passed
 with the event. Added route extension to help other templates react to route
 events.

---
 ignite-html-router.js | 67 +++++++++++++++++++++++++++++++++++++++----
 1 file changed, 62 insertions(+), 5 deletions(-)

diff --git a/ignite-html-router.js b/ignite-html-router.js
index fed362f..afe7c5f 100644
--- a/ignite-html-router.js
+++ b/ignite-html-router.js
@@ -1,5 +1,53 @@
 import { IgniteElement } from "../ignite-html/ignite-element.js";
 import { IgniteTemplate, slot, div, html } from "../ignite-html/ignite-template.js";
+import { IgniteCallback} from "../ignite-html/ignite-html.js";
+
+/**
+ * Creates a route listener that runs when a route is switched.
+ * @param {String,String[]} routes A single or multiple set of routes that will invoke the callback if met.
+ * @param {Function} callback A callback function to invoke if the route is met, it will be passed the pushstate event.
+ * @param {Boolean} strict If true all routes must match before running the callback.
+ * @returns {IgniteTemplate} This ignite template.
+ */
+IgniteTemplate.prototype.route = function(routes, callback, strict = false) {
+    //If routes is not an array, wrap it.
+    if (!Array.isArray(routes)) {
+        routes = [routes];
+    }
+
+    //Create a managed callback
+    var managed = new IgniteCallback(event => {
+        var routeMatches = false;
+
+        //Based on whether we are strict matching or not check if we have a match.
+        if (!strict) {
+            for (var i = 0; i < routes.length && !routeMatches; i++) {
+                routeMatches = Router.matches(routes[i]);
+            }
+        } else {
+            routeMatches = true;
+            for (var i = 0; i < routes.length && routeMatches; i++) {
+                routeMatches = Router.matches(routes[i]);
+            }
+        }
+
+        //Invoke the callback if the route matched.
+        if (routeMatches) {
+            callback(event);
+        }
+
+    }, () => {
+        window.removeEventListener("pushstate", managed.callback);
+    });
+
+    //Register our callback to the route event.
+    window.addEventListener("pushstate", managed.callback);
+
+    //Add the managed callback to our template so that upon deconstruction our callback is destroyed correctly.
+    this._callbacks.push(managed);
+
+    return this;
+};
 
 class RouterLink extends IgniteElement {
     constructor() {
@@ -62,7 +110,7 @@ class RouterLink extends IgniteElement {
 
     onClick(event) {
         event.preventDefault();
-        Router.navigate(this.target, false);
+        Router.navigate(this.target, null, false);
     }
 
     cleanup() {
@@ -175,9 +223,10 @@ class Router {
     /**
      * Navigates to a given route and refreshes the page if requested.
      * @param {String} route The route to navigate to.
+     * @param {Any} data The data to pass along with this navigate, this only applies when not refreshing, default is null.
      * @param {Boolean} refresh Whether or not to refresh the page, default is false.
      */
-    static navigate(route, refresh = false) {
+    static navigate(route, data = null, refresh = false) {
         if (refresh) {
             if (Router.hashMode) {
                 window.location.hash = route;
@@ -194,7 +243,10 @@ class Router {
                 Router.states.push(route);
             }
 
-            window.dispatchEvent(new Event("pushstate"));
+            //Create a new pushstate event and fire it.
+            var event = new Event("pushstate");
+            event.data = data;
+            window.dispatchEvent(event);
         }
     }
 
@@ -206,16 +258,21 @@ class Router {
     static back(fallback = null, refresh  = false) {
         if (Router.states && Router.states.length > 1) {
             Router.states.pop(); //Pop the current state.
-            Router.navigate(Router.states.pop(), refresh); //Navigate to the previous state.
+            Router.navigate(Router.states.pop(), null, refresh); //Navigate to the previous state.
         } else {
             if (fallback) {
-                Router.navigate(fallback, refresh);
+                Router.navigate(fallback, null, refresh);
             } else {
                 window.history.back();
             }
         }
     }   
 
+    /**
+     * Returns whether or not the current location matches a given route.
+     * @param {String} route The route to check.
+     * @returns {Boolean} Returns whether or not the current browser location matches the route.
+     */
     static matches(route) {
         //Get the path parts from the window
         var pathParts = [];