From 93bc3ed05429f36d6eff08eac29dcba5142d3325 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Paul=20H=C3=A4nsch?= <paul@plutz.net>
Date: Sat, 15 Feb 2020 09:42:11 +0100
Subject: [PATCH] quest status support

---
 engine.js | 72 ++++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 48 insertions(+), 24 deletions(-)

diff --git a/engine.js b/engine.js
index 3b36331..f3481c7 100644
--- a/engine.js
+++ b/engine.js
@@ -2,6 +2,7 @@ var gamedata = {
   // associative array for gamedata files
   load: function(def) { return this[def] ? this[def] : this[def] = new Textfile(def); }
 }
+
 var gfx = {
   // associative array for game graphics
   load: function(def) {
@@ -11,9 +12,14 @@ var gfx = {
     }
     return this[def];
   }
-};
+}
+
+// map object is global
 var map;
 
+// quest status
+var qstatus = {};
+
 function Textfile(txtfile) {
   // fetch and parse gamedata file into structured object
   var lines, fetch = new XMLHttpRequest();
@@ -90,6 +96,11 @@ function Textfile(txtfile) {
     case /^mapmod=.*$/.test(line):
       ref.mapmod = line.split(/[=]/)[1].split(/[;]/).map( m => m.split(/[,]/).map( n => n * 1 ? n * 1 : n) );
       break;
+    // status array used in events
+    case /^(requires_status|requires_not_status|set_status|unset_status)=.*$/.test(line):
+      key = line.split(/[=]/)[0]; value = line.split(/[=]/)[1];
+      ref[key] = value.split(/[,]/);
+      break;
     // general array type, will not be aggregated
     case /^[^#].*=.*,.*$/.test(line):
       key = line.split(/[=]/)[0]; value = line.split(/[=]/)[1].split(/,/);
@@ -137,13 +148,13 @@ function Map(textdef) {
     this.info.layer.find(l => l.type == "collision").data[loc] = 1;
   }
 
-  this.events = [];
-  for (let ev of this.info.event) {
+  this.triggers = [];
+  for ( let ev of this.info.event.filter(e => e.activate == "on_trigger") ) {
     for (let x = ev.location[0]; x < ev.location[0] + ev.location[2]; x++)
       for (let y = ev.location[1]; y < ev.location[1] + ev.location[3]; y++) {
         let loc = y * w + x;
-        if (!this.events[loc]) this.events[loc] = [];
-        this.events[loc].push(ev);
+        if (!this.triggers[loc]) this.triggers[loc] = [];
+        this.triggers[loc].push(ev);
       }
   }
 
@@ -429,30 +440,43 @@ function Controls(hero){
     else player.stance();
 
     map.center(hero.position[0], hero.position[1]);
-    events(hero.position[0], hero.position[1]);
+    triggers(hero.position[0], hero.position[1]);
   }
 
   // Process on_trigger events at pixel position x/y
-  function events(x, y) {
-    const i = map.tileAt(x,y); let ev, e, n;
-    if (map.events[i]) {
-      // intramap (teleporters)
-      if ( ev = map.events[i].find(e => (e.activate == "on_trigger" && e.intramap)) ){
-        ev = ev.intramap;
-        hero.place( map.xOf(ev[0], ev[1]), map.yOf(ev[0], ev[1]) );
-        map.center( map.xOf(ev[0], ev[1]), map.yOf(ev[0], ev[1]) );
+  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 => s in qstatus)
+                     ).filter( t => (!t.requires_not_status) ? true : !t.requires_not_status.find(s => s in qstatus) )
+    ) {
+      // game status modification
+      if ( trigger.set_status ) for (item of trigger.set_status) {
+        qstatus[item] = true;
+      }
+      if ( trigger.unset_status ) for (item of trigger.unset_status) {
+        qstatus[item] = false;
+      }
+      if ( item = trigger.msg ) {
+        console.log(item);
+      }
+      // intramap (i.e. teleporters)
+      if ( item = trigger.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, ...)
-      for (ev of map.events[i].filter(e => (e.activate == "on_trigger" && e.mapmod)) ){
-        for (ev of ev.mapmod)
-          map.info.layer.find(l => l.type == ev[0]).data[ev[2] * map.info.header.width + ev[1]] = ev[3];
+      if ( trigger.mapmod ) for (item of trigger.mapmod) {
+          map.info.layer.find(l => l.type == item[0]).data[item[2] * map.info.header.width + item[1]] = item[3];
       }
-      // intermap (must be last because loading new map breaks further event search)
-      if ( ev = map.events[i].find(e => (e.activate == "on_trigger" && e.intermap)) ){
-        ev = ev.intermap;
-        map = new Map(ev[0]);
-        hero.place( map.xOf(ev[1], ev[2]), map.yOf(ev[1], ev[2]) );
-        map.center( map.xOf(ev[1], ev[2]), map.yOf(ev[1], ev[2]) );
+      // intermap (i.e. enter new area)
+      if ( item = trigger.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]) );
+        break;  // further events would not be valid on new map
       }
     }
   }
@@ -483,7 +507,7 @@ function Controls(hero){
         let cy = map.tileY(click[0], click[1]);
         if (   (cx == hx - 1 || cx == hx + 1 || cx == hx)
             && (cy == hy - 1 || cy == hy + 1 || cy == hy))
-        events(click[0], click[1]);
+        triggers(click[0], click[1]);
       click = [];
     }
   }
-- 
2.39.2