Merge pull request #97 from GoTeamEpsilon/readme_with_simplified_reducer_example

README with simplified reducer example

Author: Matthew Vita

README.md

@@ -177,32 +177,34 @@ export default function patientReducer (state = initialState, action) {
       result = copy
       break
     case 'UPDATE_PATIENT_DATA':
-      copy[action.payload[0]].basic = action.payload[1]
+      copy[copy.patientInContext].basic = action.payload
       result = copy
       break
     case 'UPDATE_CONTACT_DATA':
-      const contactIndexForUpdation = _.findIndex(copy[action.payload[0]].contacts, (c) => {
-        return c.id === action.payload[1].id
+      const contactIndexForUpdation = _.findIndex(copy[copy.patientInContext].contacts, (c) => {
+        if (c && c.hasOwnProperty('id')) {
+          return c.id === action.payload.id
+        }
       })
-      copy[action.payload[0]].contacts[contactIndexForUpdation] = action.payload[1]
+      copy[copy.patientInContext].contacts[contactIndexForUpdation] = action.payload
       result = copy
       break
     case 'START_ADDING_CONTACT':
-      const lastContact = _.last(copy[action.payload[0]].contacts)
+      const lastContact = _.last(copy[copy.patientInContext].contacts)
       let newContactId = 0
       if (lastContact != null && lastContact.hasOwnProperty('id')) {
         newContactId = lastContact.id + 1
       }
-      copy[action.payload[0]].contacts.push({ isNewContact: true, id: newContactId })
+      copy[copy.patientInContext].contacts.push({ isNewContact: true, id: newContactId })
       result = copy
       break
     case 'DELETING_CONTACT':
-      const contactIndexForDeletion = _.findIndex(copy[action.payload[0]].contacts, (c) => {
+      const contactIndexForDeletion = _.findIndex(copy[copy.patientInContext].contacts, (c) => {
         if (c && c.hasOwnProperty('id')) {
-          return c.id === action.payload[1]
+          return c.id === action.payload
         }
       })
-      delete copy[action.payload[0]].contacts[contactIndexForDeletion]
+      delete copy[copy.patientInContext].contacts[contactIndexForDeletion]
       result = copy
       break
     default: