Denormalized some calculations into recomputation step

app/imports/api/creature/computation/computeEndStepProperty.js

@@ -0,0 +1,61 @@
+import evaluateCalculation from '/imports/api/creature/computation/evaluateCalculation.js';
+
+export default function computeEndStepProperty(prop, memo){
+  switch (prop.type){
+    case 'action':
+    case 'spell':
+      computeAction(prop, memo);
+      break;
+    case 'attack':
+      computeAction(prop, memo);
+      computeAttack(prop, memo);
+      break;
+    case 'savingThrow':
+      computeSavingThrow(prop, memo);
+      break;
+    case 'spellList':
+      computeSpellList(prop, memo);
+      break;
+  }
+}
+
+function computeAction(prop, memo){
+  let {value, errors} = evaluateCalculation(prop.uses, memo);
+  prop.usesResult = value;
+  if (errors.length){
+    prop.usesErrors = errors;
+  } else {
+    delete prop.usesErrors;
+  }
+  // TODO compute resources.$.$.available and insufficientResources
+}
+
+function computeAttack(prop, memo){
+  let {value, errors} = evaluateCalculation(prop.rollBonus, memo);
+  prop.rollBonusResult = value;
+  if (errors.length){
+    prop.rollBonusErrors = errors;
+  } else {
+    delete prop.rollBonusErrors;
+  }
+}
+
+function computeSavingThrow(prop, memo){
+  let {value, errors} = evaluateCalculation(prop.dc, memo);
+  prop.dcResult = value;
+  if (errors.length){
+    prop.dcErrors = errors;
+  } else {
+    delete prop.dcErrors;
+  }
+}
+
+function computeSpellList(prop, memo){
+  let {value, errors} = evaluateCalculation(prop.maxPrepared, memo);
+  prop.maxPreparedResult = value;
+  if (errors.length){
+    prop.maxPreparedErrors = errors;
+  } else {
+    delete prop.maxPreparedErrors;
+  }
+}