map rules object on results run

src/reducers/stateReducer.results.js

@@ -1,11 +1,22 @@
 // @flow
-import type { stateType } from './stateReducer';
+import type { stateType, epochType, phoneType } from './stateReducer';
 
 export type resultsAction = {
   type: 'RUN'
 }
 
-const findFeatures = (phones: {}, lexeme:string): [] => {
+export type decomposedRulesType = [
+  {
+    environment: {
+      pre: [{[key: string]: boolean}],
+      position: [{[key: string]: boolean}],
+      post: [{[key: string]: boolean}]
+    },
+    newFeatures: [{[key: string]: boolean}]
+  }
+]
+
+const findFeaturesFromLexeme = (phones: {}, lexeme:string): [] => {
   let featureBundle = []
   let lastIndex = lexeme.length - 1;
   let node = {};
@@ -23,12 +34,80 @@ const findFeatures = (phones: {}, lexeme:string): [] => {
   })
   return featureBundle;
 }
+const findFeaturesFromGrapheme = (phones: {}, lexeme:string): [] => {
+  let featureBundle = []
+  let lastIndex = lexeme.length - 1;
+  let node = {};
+  [...lexeme].forEach((graph, index) => {
+    if (!index && !lastIndex) featureBundle.push(phones[graph].features)
+    if (!index) return node = phones[graph]
+    if (index === lastIndex) return node[graph] 
+      ? featureBundle.push(node[graph])
+      : featureBundle.push(node, phones[graph])
+    if (!node[graph] && node.features) {
+      featureBundle.push(node)
+      return node = phones[graph]
+    }
+    if (!node[graph])
+    return node = node[graph]
+  })
+  return featureBundle;
+}
 
-const decomposeRule = (rule: string): string[] => {
+const decomposeRule = (rule: string) => {
   let decomposedChange = rule.split('>');
   decomposedChange = [decomposedChange[0], ...decomposedChange[1].split('/')]
   decomposedChange = [decomposedChange[0], decomposedChange[1], ...decomposedChange[2].split('_')];
-  return [...decomposedChange];
+  const ruleBundle = {
+    environment: {
+      pre: decomposedChange[2], 
+      position: decomposedChange[0], 
+      post: decomposedChange[3]
+    },
+    newFeatures: decomposedChange[1]
+  }
+  return ruleBundle;
+}
+
+const mapStringToFeatures = (ruleString, phones) => {
+  if (ruleString) {
+    const ruleBrackets = ruleString.match(/\[.*\]/)
+    if (ruleBrackets) {
+      const ruleFeatures = ruleString.match(/(?!\[).*(?<!\])/)[0]
+      const plusIndex = ruleFeatures.indexOf('+');
+      const minusIndex = ruleFeatures.indexOf('-');
+      const positiveFeatures = ruleFeatures.slice(plusIndex + 1, minusIndex).trim().split(' ');
+      const positiveFeaturesMap = positiveFeatures.map(feature => ({[feature]: true}))
+      const negativeFeatures = ruleFeatures.slice(minusIndex +1).trim().split(' ');
+      const negativeFeaturesMap = negativeFeatures.map(feature => ({[feature]: false}))
+      return {...positiveFeaturesMap, ...negativeFeaturesMap}
+    }
+    const grapheme = ruleString;
+    return findFeaturesFromGrapheme(phones, grapheme);
+  }
+  return {};
+}
+
+const mapRuleBundleToFeatureBundle = (ruleBundle, phones) => {
+  // ! for each object in ruleBundle, map values to array of objects with feature-boolean key-value pairs
+  const featureBundle = {...ruleBundle};
+  console.log(featureBundle)
+  featureBundle.environment.pre = mapStringToFeatures(featureBundle.environment.pre, phones);
+  console.log(featureBundle.environment.pre)
+  featureBundle.environment.position = mapStringToFeatures(featureBundle.environment.position, phones);
+  console.log(featureBundle.environment.position)
+  featureBundle.environment.post = mapStringToFeatures(featureBundle.environment.post, phones);
+  console.log(featureBundle.environment.post)
+  featureBundle.newFeatures = mapStringToFeatures(featureBundle.newFeatures, phones);
+  console.log(featureBundle.newFeatures)
+  return featureBundle;
+}
+
+export const decomposeRules = (epoch: epochType, phones: {[key: string]: phoneType}): decomposedRulesType => {
+  let ruleBundle = [...epoch.changes]
+  ruleBundle = epoch.changes.map(rule => decomposeRule(rule));
+  const featureBundle = ruleBundle.map(rule => mapRuleBundleToFeatureBundle(rule, phones));
+  return featureBundle;
 }
 
 export const run = (state: stateType, action: resultsAction): stateType => {
@@ -43,7 +122,7 @@ export const run = (state: stateType, action: resultsAction): stateType => {
     })
   })
   
-  let featurePhoneBundle = state.lexicon.map(lexeme => findFeatures(state.phones, lexeme))
+  let featurePhoneBundle = state.lexicon.map(lexeme => findFeaturesFromLexeme(state.phones, lexeme))
   
   console.log(featurePhoneBundle)
   ruleBundle.forEach(rule => {

src/reducers/stateReducer.results.test.js

@@ -1,5 +1,6 @@
 import { stateReducer } from './stateReducer';
 import { initState } from './stateReducer.init';
+import { decomposeRules } from './stateReducer.results';
 
 describe('Results', () => {
   let state = {};
@@ -12,15 +13,39 @@ describe('Results', () => {
     expect(stateReducer(state, action)).toBe(state);
   });
 
-  it('results returned from first sound change rule', () => {
+  it('rules decomposed properly', () => {
-    const action = {type: 'RUN'};
+    const epoch = initState().epochs[0];
-    state = initState(0)
+    epoch.changes = epoch.changes.slice(0,1)
-    expect(stateReducer(state, action).results).toEqual({
+    const phones = initState().phones;
-      pass: 'epoch 1',
+    const result = [
-      results: [
+      {
-        'anna', 'anat', 'anət', 'anna', 'tan', 'ənna'
+        // ! '[+ occlusive - nasal]>[+ occlusive nasal]/n_',
-      ]
+        environment: {
+          pre: [
+            {
+              sonorant: true, nasal: true, occlusive: true, coronal: true
+            }
+          ],
+          position: [
+            {occlusive: true, nasal: false}
+          ],
+          post: [],
+        },
+        newFeatures: {occlusive: true, nasal: true}
+      }
+    ];
+    expect(decomposeRules(epoch, phones)).toBe(result);
   })
-  });
+
+  // it('results returned from first sound change rule', () => {
+  //   const action = {type: 'RUN'};
+  //   state = initState(0)
+  //   expect(stateReducer(state, action).results).toEqual({
+  //     pass: 'epoch 1',
+  //     results: [
+  //       'anna', 'anat', 'anət', 'anna', 'tan', 'ənna'
+  //     ]
+  //   })
+  // });
 
 });