Update libhooktick.js

Adds additional capabilities and functionality

mods/libhooktick.js

@@ -1,15 +1,49 @@
-let __registeredTickCallbacks = [];
+let __registeredAfterTickCallbacks = [];
+let __registeredBeforeTickCallbacks = [];
 window.addEventListener("load", ()=>{
-  let oldTick = tick;
+  const oldTick = tick;
   clearInterval(tickInterval);
   tick = function(){
+    __registeredBeforeTickCallbacks.forEach(func=>{
+      func();
+    });
     oldTick();
-    __registeredTickCallbacks.forEach(func=>{
+    __registeredAfterTickCallbacks.forEach(func=>{
       func();
     });
   }
   tickInterval = setInterval(tick, 1000/tps);
 });
 function everyTick(callback) {
-  __registeredTickCallbacks.push(callback);
+  afterEveryTick(callback);
 }
+window.everyTick = everyTick;
+function beforeEveryTick(callback) {
+  __registeredBeforeTickCallbacks.push(callback);
+}
+window.beforeEveryTick = beforeEveryTick;
+function afterEveryTick(callback) {
+  __registeredAfterTickCallbacks.push(callback);
+}
+window.afterEveryTick = afterEveryTick;
+function removeTickListener(callback, mode) {
+  let removed = false;
+  if(mode!=="before") {
+    let index = __registeredAfterTickCallbacks.indexOf(callback);
+    if (index === -1 && mode === "after") throw new Error(`Could not find callback.`);
+    if(index !== -1) {
+      __registeredAfterTickCallbacks.splice(index, 1);
+      removed = true;
+    }
+  }
+  if(mode!=="after") {
+    let index = __registeredBeforeTickCallbacks.indexOf(callback);
+    if (index === -1 && mode === "before") throw new Error(`Could not find callback.`);
+    if(index !== -1) {
+      __registeredBeforeTickCallbacks.splice(index, 1);
+      removed = true;
+    }
+  }
+  return removed;
+}
+window.removeTickListener = removeTickListener;