From 50f16ca8d19bc89de4a35b4271484e9ae4df562e Mon Sep 17 00:00:00 2001
From: =?utf8?q?Paul=20H=C3=A4nsch?= <paul@plutz.net>
Date: Sun, 16 Feb 2020 00:44:04 +0100
Subject: [PATCH] enable onload events (allowing persistent map changes, etc.)

---
 engine.js | 38 +++++++++++++++++++++++++++-----------
 1 file changed, 27 insertions(+), 11 deletions(-)

diff --git a/engine.js b/engine.js
index 459a9dd..5fe7b6e 100644
--- a/engine.js
+++ b/engine.js
@@ -410,6 +410,8 @@ function Controls(hero){
   }
   var keys = [], click = [];
 
+  loadevents();
+
   window.addEventListener("keydown", e => keys[e.keyCode] = true );
   window.addEventListener("keyup"  , e => keys[e.keyCode] = false);
   window.addEventListener("click", m => click = [ map.mapX(m.clientX), map.mapY(m.clientY) ] );
@@ -446,36 +448,50 @@ function Controls(hero){
   // Process on_trigger events at pixel position x/y
   function triggers(x, y) {
     const i = map.tileAt(x,y);
-    var trigger, item;
 
-    if (map.triggers[i]) for ( trigger of map.triggers[i].filter(
-                               t => (!t.requires_status)     ? true : t.requires_status.find(s => qstatus[s])
-                     ).filter( t => (!t.requires_not_status) ? true : !t.requires_not_status.find(s => qstatus[s]) )
-    ) {
+    if ( map.triggers[i] ) events (
+      map.triggers[i].filter( t => (!t.requires_status)     ? true : t.requires_status.find(s => qstatus[s])
+                    ).filter( t => (!t.requires_not_status) ? true : !t.requires_not_status.find(s => qstatus[s]) )
+    );
+  }
+
+  function loadevents() {
+    if ( map.info.event ) events(
+      map.info.event.filter( ev => ev.activate == "on_load"
+        ).filter( t => (!t.requires_status)     ? true : t.requires_status.find(s => qstatus[s])
+        ).filter( t => (!t.requires_not_status) ? true : !t.requires_not_status.find(s => qstatus[s]) )
+    )
+  }
+
+  function events( events ) {
+    var ev, item;
+
+    for ( ev of events ) {
       // game status modification
-      if ( trigger.set_status ) for (item of trigger.set_status) {
+      if ( ev.set_status ) for (item of ev.set_status) {
         qstatus[item] = true;
       }
-      if ( trigger.unset_status ) for (item of trigger.unset_status) {
+      if ( ev.unset_status ) for (item of ev.unset_status) {
         qstatus[item] = false;
       }
-      if ( item = trigger.msg ) {
+      if ( item = ev.msg ) {
         console.log(item);
       }
       // intramap (i.e. teleporters)
-      if ( item = trigger.intramap ){
+      if ( item = ev.intramap ){
         hero.place( map.xOf(item[0], item[1]), map.yOf(item[0], item[1]) );
         map.center( map.xOf(item[0], item[1]), map.yOf(item[0], item[1]) );
       }
       // mapmod (e.g. opening doors, activating platforms, changing terrain, ...)
-      if ( trigger.mapmod ) for (item of trigger.mapmod) {
+      if ( ev.mapmod ) for (item of ev.mapmod) {
           map.info.layer.find(l => l.type == item[0]).data[item[2] * map.info.header.width + item[1]] = item[3];
       }
       // intermap (i.e. enter new area)
-      if ( item = trigger.intermap ){
+      if ( item = ev.intermap ){
         map = new Map(item[0]);
         hero.place( map.xOf(item[1], item[2]), map.yOf(item[1], item[2]) );
         map.center( map.xOf(item[1], item[2]), map.yOf(item[1], item[2]) );
+        loadevents();
         break;  // further events would not be valid on new map
       }
     }
-- 
2.39.2