Refactored computation into folders

app/imports/api/creature/computation/engine/computeEffect.js

@@ -0,0 +1,54 @@
+import evaluateCalculation from '/imports/api/creature/computation/engine/evaluateCalculation.js';
+import applyToggles from '/imports/api/creature/computation/engine/applyToggles.js';
+
+export default function computeEffect(effect, memo){
+  if (effect.computationDetails.computed) return;
+  if (effect.computationDetails.busyComputing){
+    // Trying to compute this effect again while it is already computing.
+    // We must be in a dependency loop.
+    effect.computationDetails.computed = true;
+    effect.result = NaN;
+    effect.computationDetails.busyComputing = false;
+    effect.computationDetails.error = 'dependencyLoop';
+    if (Meteor.isClient) console.warn('dependencyLoop', effect);
+    return;
+  }
+  // Before doing any work, mark this effect as busy
+  effect.computationDetails.busyComputing = true;
+
+  // Apply any toggles
+  applyToggles(effect, memo);
+
+  // Determine result of effect calculation
+  delete effect.errors;
+  if (!effect.calculation){
+    if(effect.operation === 'add' || effect.operation === 'base'){
+      effect.result = 0;
+    } else {
+      delete effect.result
+    }
+  } else if (Number.isFinite(+effect.calculation)){
+    effect.result = +effect.calculation;
+  } else if(effect.operation === 'conditional' || effect.operation === 'rollBonus'){
+    effect.result = effect.calculation;
+  } else if(_.contains(['advantage', 'disadvantage', 'fail'], effect.operation)){
+    effect.result = 1;
+  } else {
+    let {
+      result,
+      context,
+      dependencies,
+    } = evaluateCalculation({
+      string: effect.calculation,
+      prop: effect,
+      memo
+    });
+    effect.result = result.value;
+    effect.dependencies.push(...dependencies);
+    if (context.errors.length){
+      effect.errors = context.errors;
+    }
+  }
+  effect.computationDetails.computed = true;
+  effect.computationDetails.busyComputing = false;
+}