Attacks can now critical hit. criticalHitTarget overrides the roll required

app/imports/api/creature/actions/applyAttack.js

@@ -4,13 +4,19 @@ export default function applyAttack({
   prop,
   log,
   actionContext,
+  creature,
 }){
   let value = roll(1, 20)[0];
   actionContext.attackRoll = {value};
+  let criticalHitTarget = creature.variables.criticalHitTarget &&
+    creature.variables.criticalHitTarget.currentValue || 20;
+  let criticalHit = value >= criticalHitTarget;
+  if (criticalHit) actionContext.criticalHit = {value: true};
   let result = value + prop.rollBonusResult;
   actionContext.toHit = {value: result};
+
   log.content.push({
-    name: 'To Hit',
+    name: criticalHit ? 'Critical Hit!' : 'To Hit',
     resultPrefix: `1d20 [${value}] + ${prop.rollBonusResult} = `,
     result,
   });

app/imports/api/creature/actions/applyDamage.js

@@ -1,6 +1,7 @@
 import evaluateString from '/imports/api/creature/computation/afterComputation/evaluateString.js';
 import dealDamage from '/imports/api/creature/creatureProperties/methods/dealDamage.js';
 import {insertCreatureLog} from '/imports/api/creature/log/CreatureLogs.js';
+import { CompilationContext } from '/imports/parser/parser.js';
 
 export default function applyDamage({
   prop,
@@ -14,8 +15,19 @@ export default function applyDamage({
     ...creature.variables,
     ...actionContext,
   };
+  if (targets.length === 1){
+    scope.target = targets[0].variables;
+  }
+  let criticalHit = !!(
+    actionContext.criticalHit &&
+    actionContext.criticalHit.value &&
+    prop.damageType !== 'healing' // Can't critically heal
+  );
+  let context = new CompilationContext({
+    doubleRolls: criticalHit,
+  });
   try {
-    var {result, errors} = evaluateString(prop.amount, scope, 'reduce');
+    var {result, errors} = evaluateString(prop.amount, scope, 'reduce', context);
     if (typeof result !== 'number') {
       log.content.push({
         error: errors.join(', '),
@@ -26,11 +38,13 @@ export default function applyDamage({
       error: e.toString(),
     });
   }
+  let suffix = (criticalHit ? ' critical ' : '') +
+    prop.damageType +
+    (prop.damageType !== 'healing' ? ' damage': '');
+
   if (damageTargets && damageTargets.length) {
     damageTargets.forEach(target => {
       let name = prop.damageType === 'healing' ? 'Healing' : 'Damage';
-      let suffix = prop.damageType +
-        prop.damageType !== 'healing' ? ' damage': '';
       if (prop.target === 'each'){
         result = evaluateString(prop.amount, scope, 'reduce');
       }
@@ -69,7 +83,7 @@ export default function applyDamage({
     log.content.push({
       name: prop.damageType === 'healing' ? 'Healing' : 'Damage',
       result,
-      details: `${prop.damageType}${prop.damageType !== 'healing'? ' damage': ''}`,
+      details: suffix,
     });
   }
 }

app/imports/api/creature/actions/applyProperties.js

@@ -52,30 +52,29 @@ function applyProperty(options){
   return true;
 }
 
-export default function applyProperties({
-  forest,
-  creature,
-  targets,
-  actionContext,
-  log,
-}){
+function applyPropertyAndWalkChildren({prop, child, targets, ...options}){
+  let shouldKeepWalking = applyProperty({ prop, targets, ...options });
+  if (shouldKeepWalking){
+    applyProperties({ forest: child.children, targets, ...options,});
+  }
+}
+
+export default function applyProperties({ forest, targets, ...options}){
   forest.forEach(child => {
-    let walkChildren = applyProperty({
-      prop: child.node,
-      children: child.children,
-      creature,
-      targets,
-      actionContext,
-      log,
-    });
-    if (walkChildren){
-      applyProperties({
-        forest: child.children,
-        creature,
-        targets,
-        actionContext,
-        log,
+    let prop = child.node;
+    if (shouldSplit(prop)){
+      targets.forEach(target => {
+        let targets = [target]
+        applyPropertyAndWalkChildren({ targets, prop, child, ...options});
       });
+    } else {
+      applyPropertyAndWalkChildren({prop, child, targets, ...options});
     }
   });
 }
+
+function shouldSplit(prop){
+  if (prop.target === 'each'){
+    return true;
+  }
+}

app/imports/api/creature/computation/afterComputation/evaluateString.js

@@ -1,7 +1,7 @@
 import { parse, CompilationContext } from '/imports/parser/parser.js';
 import ConstantNode from '/imports/parser/parseTree/ConstantNode.js';
 
-export default function evaluateString(string, scope, fn = 'compile'){
+export default function evaluateString(string, scope, fn = 'compile', context){
   let errors = [];
   if (!string){
     errors.push('No string provided');
@@ -18,7 +18,9 @@ export default function evaluateString(string, scope, fn = 'compile'){
     errors.push(e);
     return {result: string, errors};
   }
-  let context = new CompilationContext();
+  if (!context){
+    context = new CompilationContext({});
+  }
   let result = node[fn](scope, context);
   if (result instanceof ConstantNode){
     return {result: result.value, errors: context.errors}