Unified Contacts for React Native Apps

Your best friend when working with the latest and greatest Contacts Framework in iOS 9+ and combining that with Android 6 (SDK 23)+ support

Platform Compatibility

Requires iOS 9+ and Swift 4 for iOS or Android M (6.0 / SDK 23)+ for Anrdoid

 iOSAndroidNotes
getContact🚫 
getContacts 
searchContacts 
selectContact🚫Opens up native Contacts app and allows User to select a single Contact.
openContact🚫Opens up a native card for a single Contact, allowing the User to contact them.
addContact🚫 
updateContact🚫 
deleteContact🚫 
getGroup🚫 
getGroups🚫 
contactsInGroup🚫 
addGroup🚫 
updateGroup🚫 
deleteGroup🚫 
addContactsToGroup🚫 
removeContactsFromGroup🚫 
userCanAccessContacts 
requestAccessToContacts 
alreadyRequestedAccessToContacts✅️Android lets you request permission after denying, but not if "Don't ask again" is checked.
openPrivacySettings 

Apple recently did a complete overhaul of their Contacts Framework that does a number of things, including:

  1. Making it simpler to use the framework.
  2. Use the same framework across all their platforms, including iOS, tvOS, watchOS and even OS X.
  3. Get unified Contact details not only from a User's local Contact entry, but also from the user's social accounts, like Facebook and Twitter. This allows you to get a Facebook profile picture for a Contact you have in your contact database.

Installation

  1. Install the npm package:This will install the latest react-native-unified-contacts package and add it to your package.json file.
npm install --save react-native-unified-contacts

Automatic Installation

  1. Link the project:
react-native link react-native-unified-contacts

Manual Installation

Manual installation is only required if automatic linking fails.

iOS

  1. Navigate to <your-project-directory>/node_modules/react-native-unified-contacts/ and drag the RNUnifiedContacts directory into your project directory in Xcode.
  2. Ensure that Copy items if needed is not checked
  3. Select Create groups and ensure your project is selected for a target.

Select files

Android

  1. In android/settings.gradle:
...
include ':react-native-unified-contacts'
project(':react-native-unified-contacts').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-unified-contacts/android')

2.    In android/app/build.gradle:

...
dependencies {
    ...
    implementation project(':react-native-unified-contacts')
}

3.   Also in android/app/build.gradle: Set minSdkVersion to 23 (Android 6.0 or i.e. Android M)

...

android {
  ...
  defaultConfig {
    ...
    minSdkVersion 23
    ...

In android/app/source/main/AndroidManifest.xml:

...
  <uses-sdk
 ...
 android:minSdkVersion="23"
 ...
  />
  ...

In in android/app/src/main/java/[your-app]/MainActivity.java:

import com.joshuapinter.RNUnifiedContacts.RNUnifiedContactsPackage; // <------ Add this line

public class MainApplication extends Application implements ReactApplication {
  ...
  private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
    @Override
    public boolean getUseDeveloperSupport() {
      return BuildConfig.DEBUG;
    }
    ...
    @Override
    protected List<ReactPackage> getPackages() {
      return Arrays.<ReactPackage>asList(
        new MainReactPackage(),
        ...
        new RNUnifiedContactsPackage(),  // <------ Add this line
        ...
      );
    }
    ...
  }

Post-Install Setup

Permissions iOS

For iOS 10+, you need to add a NSContactsUsageDescription key to your Info.plist, also called Privacy - Contacts Usage Description if entered through XCode's interface. This provides a reason why your app needs to access private information:

<key>NSContactsUsageDescription</key>
<string>ntwrk accesses Contacts in order to quickly add Relationships and allow them to reach out via ntwrk through email, text, phone, etc.</string>

Permissions Android

Add permissions to your android/app/src/main/AndroidManifest.xml file. Below are exampes. You may only need READ_CONTACTS. Only ask for the permissions your app needs.

...
  <uses-permission android:name="android.permission.READ_PROFILE" />
  <uses-permission android:name="android.permission.READ_CONTACTS" />
  <uses-permission android:name="android.permission.WRITE_CONTACTS" />
...

Usage

Import Contacts Library

import Contacts from 'react-native-unified-contacts';

Getting Contacts

Get a single contact

let contactIdentifier = 'A7806266-6574-4731-82E1-C54946F63E1C';

Contacts.getContact( contactIdentifier, (error, contact) =>  {
  if (error) {
    console.error(error);
  }
  else {
    console.log(contact);
  }
});

Get All Contacts

Contacts.getContacts( (error, contacts) =>  {
  if (error) {
    console.error(error);
  }
  else {
    console.log(contacts);
  }
});

Search All Contacts

Contacts.searchContacts( 'Don Draper', (error, contacts) =>  {
  if (error) {
    console.error(error);
  }
  else {
    console.log(contacts);
  }
});

This will search the given (first), family (last) and nick names of all of the contacts for the provided string. Future versions will allow you to search other fields as well, like phone or email.

Select a Single Contact

Select Contact GIF

This will launch the stock Contacts app and allow you to select a particular Contact, returning the Contact card to your app. Android Only

Contacts.selectContact( (error, contact) =>  {
  if (error) {
    console.error(error);
  }
  else {
    console.log(contact);
  }
});

Open a Single Contact

This will launch the stock Contact card of a single Contact and allows you to contact them through text, phone, email, etc. Android Only

Contacts.openContact( contactIdentifier );

Adding Contacts

Add a single contact

let contactData = {
  'givenName':        'John',
  'familyName':       'Appleseed',
  'organizationName': 'Apple Inc',
  'phoneNumbers': [
    {'label': 'Home', 'stringValue': '555-522-8243'},
    {'label': 'Work', 'stringValue': '(408) 555-5270'},
  ],
  'emailAddresses': [
    {'label': 'Work', 'value': 'john.appleseed@apple.com'},
    {'label': 'Home', 'value': 'john@gmail.com'},
  ],
  'postalAddresses': [
    {
      'label': 'Work',
      'street': '123 Fake Street',
      'city':  'Boston',
      'state':  'MA',
      'postalCode':  '90210',
      'country':  'United States',
    },
    {
      'label': 'Home',
      'street': '123 North Street',
      'city':  'Halifax',
      'state':  'NS',
      'postalCode':  'M5M 4T4',
      'country':  'Canada',
    },
  ],
}

Contacts.addContact( contactData, (error, success) => {
  if (error) {
    console.log(error);
  }
  else {
    console.log(success);
  }
});

Updating Contacts

Update a single contact

let contactIdentifier = 'A7806266-6574-4731-82E1-C54946F63E1C';

let contactData = {
  'givenName':        'John',
  'familyName':       'Appleseed',
  'organizationName': 'Apple Inc',
  'phoneNumbers': [
    {'label': 'Home', 'stringValue': '555-522-8243'},
    {'label': 'Work', 'stringValue': '(408) 555-5270'},
  ],
  'emailAddresses': [
    {'label': 'Work', 'value': 'john.appleseed@apple.com'},
    {'label': 'Home', 'value': 'john@gmail.com'},
  ],
  'postalAddresses': [
    {
      'label': 'Work',
      'street': '123 Fake Street',
      'city':  'Boston',
      'state':  'MA',
      'postalCode':  '90210',
      'country':  'United States',
    },
    {
      'label': 'Home',
      'street': '123 North Street',
      'city':  'Halifax',
      'state':  'NS',
      'postalCode':  'M5M 4T4',
      'country':  'Canada',
    },
  ],
}

Contacts.updateContact(contactIdentifier, contactData, (error, success) => {
  if (error) {
    console.log(error);
  }
  else {
    console.log(success);
  }
});

NOTE: If your contactData includes the keys phoneNumbers, emailAddresses, or postalAddresses the associated value will completely replace any Phone Numbers, Email Addresses or Postal Addresses for that Contact, respectively. In other words, if you have a contact with two Phone Numbers and you'd like to add a third, you need to pass in ALL THREE Phone Numbers, not just the new one. Same goes for Email Addresses and Postal Addresses.

Deleting Contacts

Delete a single contact

let contactIdentifier = 'A7806266-6574-4731-82E1-C54946F63E1C';

Contacts.deleteContact( contactIdentifier, (error, success) => {
  if (error) {
    console.log(error);
  }
  else {
    console.log(success);
  }
}

Getting Groups

Get a single group

let groupIdentifier = 'A7806266-6574-4731-82E1-C54946F63E1C';

Contacts.getGroup( groupIdentifier, (error, group) =>  {
  if (error) {
    console.error(error);
  } else {
    console.log(group);
  }
});

Get all Groups

Contacts.getGroups( (error, groups) =>  {
  if (error) {
    console.error(error);
  }
  else {
    console.log(groups);
  }
});

Get contacts in group

let groupIdentifier = 'A7806266-6574-4731-82E1-C54946F63E1C';

Contacts.contactsInGroup(groupIdentifier, (error, contacts) =>  {
  if (error) {
    console.error(error);
  } else {
    console.log(contacts);
  }
});

Add a group

let groupData = {
  'name': 'Friends'
}

Contacts.addGroup(groupData, (error, success) => {
  if (error) {
    console.log(error);
  }
  else {
    console.log(success);
  }
});

Update a group

let groupIdentifier = 'A7806266-6574-4731-82E1-C54946F63E1C';

let groupData = {
  'name': 'Friends'
}

Contacts.updateGroup(groupIdentifier, groupData, (error, success) => {
  if (error) {
    console.log(error);
  }
  else {
    console.log(success);
  }
});

Delete a group

let groupIdentifier = 'A7806266-6574-4731-82E1-C54946F63E1C';

Contacts.deleteGroup(groupIdentifier, (error, success) => {
  if (error) {
    console.log(error);
  }
  else {
    console.log(success);
  }
});

Add contacts to a group

let groupIdentifier = 'A7806266-6574-4731-82E1-C54946F63E1C';

let contactIdentifiers = [
  '4E5R6TGH-2EWQ-SAD2-SADS-2344EWFSDCSA',
  '8GFK43JK-2E3F-U6HF-UYTB-23R4TGTHYRDF',
  '5FTGYUHG-DSFD-4T5H-43TR-0IOJUVBHJNVG'
]

Contacts.addContactsToGroup(groupIdentifier, contactIdentifiers, (error, success) => {
  if (error) {
    console.log(error);
  } else {
    console.log(success);
  }
});

Remove contacts from a group

let groupIdentifier = 'A7806266-6574-4731-82E1-C54946F63E1C';

let contactIdentifiers = [
  '4E5R6TGH-2EWQ-SAD2-SADS-2344EWFSDCSA',
  '8GFK43JK-2E3F-U6HF-UYTB-23R4TGTHYRDF',
  '5FTGYUHG-DSFD-4T5H-43TR-0IOJUVBHJNVG'
]

Contacts.removeContactsFromGroup(groupIdentifier, contactIdentifiers, (error, success) => {
  if (error) {
    console.log(error);
  } else {
    console.log(success);
  }
});

Accessing the User's Contacts

Can The User Access Contacts?

Contacts.userCanAccessContacts( (userCanAccessContacts) => {
  if (userCanAccessContacts) {
    console.log("User has access to Contacts!");
  }
  else {
    console.log("User DOES NOT have access to Contacts!");
  }
});

This will not request access. For that, use the requestAccessToContacts.

Request Access To Contacts

Contacts.requestAccessToContacts( (userCanAccessContacts) => {
  if (userCanAccessContacts) {
    console.log("User has access to Contacts!");
  }
  else {
    console.log("User DOES NOT have access to Contacts!");
  }
});

This will do everything you'd expect. Here's the workflow:

Does the user already have access to Contacts?

Yes. Return true.

No.

If the User has not been asked before (first time asking), prompt user for access:

Yes. Return true.

No. Return false.

If user has already denied access to Contacts, return false.

The user will have to go to their privacy settings and allow access manually. We provide a openPrivacySettings method that allows you to bring up the privacy page easily for the user. See below.

Check if Already Requsted Access To Contacts

Contacts.alreadyRequestedAccessToContacts( (hasRequested) => {
  if (hasRequested) {
    console.log("You have already requested access to contacts");
  }
  else {
    console.log("You have not yet asked for access to contacts");
  }
});

Since you cannot ask again after the user refuses, this allows you to change the UI

Open the User's Privacy Settings

Contacts.openPrivacySettings()

In the event that the User has denied access to their Contacts, you will need to have them manually change their setting in the privacy page. This method will open up the right page automatically for them and improves the experience for the user.

Here's an example of how you might alert the user that they need to update their privacy settings:

// Alert the User that we can't access their Contact.
// Provide a link that will open up their Privacy Settings for ntwrk.
//
function alertUserToAllowAccessToContacts() {
  Alert.alert(
    "Can't Access Your Contacts",
    "Click on Open Settings and allow ntwrk to access your Contacts.\n" +
    "\n" +
    "Then come back!",
    [
      {text: 'Open Settings', onPress: () => Contacts.openPrivacySettings() },
      {text: "Later"}
    ]
  )
}

This will produce an alert similar to this:

Privacy Settings Alert

Contact Object

The returned Contact object(s) will look something like this:

{
  "contactRelations": [
    {
      "label": "Mother",
      "identifier": "2D103009-45E2-4CA5-A2D5-50642EE7430C",
      "name": "Mother Name",
      "localizedLabel": "mother"
    }
  ],
  "middleName": "Middle Name",
  "phoneticGivenName": "Phonetic Given Name",
  "phoneticMiddleName": "Phonetic Middle Name",
  "nickname": "Nickname",
  "phoneticFamilyName": "Phonetic Family Name",
  "previousFamilyName": "Previous Family Name",
  "familyName": "Family Name",
  "phoneNumbers": [
    {
      "label": "Home",
      "identifier": "73A0E4B6-86F6-4FAF-A7C3-D55705CA1DFF",
      "stringValue": "1 (234) 567-8901",
      "countryCode": "us",
      "digits": "12345678901",
      "localizedLabel": "home"
    }
  ],
  "identifier": "D296E8E2-982F-4C39-9845-B75808B9CF96:ABPerson",
  "givenName": "Given Name",
  "dates": [
    {
      "label": "Anniversary",
      "identifier": "FB73491F-E505-4864-8B68-F5F17C5AC4D7",
      "year": 2016,
      "month": 1,
      "day": 30,
      "localizedLabel": "anniversary"
    }
  ],
  "fullName": "Full Name",
  "nonGregorianBirthday": {
    "year": 33,
    "month": 1,
    "day": 3
  },
  "departmentName": "Department Name",
  "socialProfiles": [
    {
      "label": "twitter",
      "localizedLabel": "twitter",
      "service": "Twitter",
      "localizedService": "Twitter",
      "urlString": "http://twitter.com/12345",
      "userIdentifier": "",
      "username": "12345",
      "identifier": "53698CFA-0125-48FE-84D7-E8372CD99ECD"
    }
  ],
  "emailAddresses": [
    {
      "label": "Home",
      "identifier": "8AE516A9-A531-4BBA-B890-BFA59E47A4C7",
      "value": "person@example.com",
      "localizedLabel": "home"
    }
  ],
  "instantMessageAddresses": [
    {
      "label": "Skype",
      "identifier": "82200A8E-4F19-4F5A-A7AF-FA9F8C43B01A",
      "service": "Skype",
      "localizedService": "Skype",
      "username": "12345",
      "localizedLabel": "Skype"
    }
  ],
  "note": "Note",
  "postalAddresses": [
    {
      "label": "Home",
      "city": "City",
      "state": "CA",
      "localizedLabel": "home",
      "postalCode": "98765",
      "country": "United States",
      "isoCountryCode": "",
      "stringValue": "123 St\nCity CA 98765\nUnited States",
      "street": "123 St",
      "identifier": "7A472311-AB4F-46F4-B046-B60143DBC858"
    }
  ],
  "urlAddresses": [
    {
      "label": "HomePage",
      "identifier": "13F46F96-E5EE-4B6F-A8A6-EBC3C459E314",
      "value": "www.example.com",
      "localizedLabel": "homepage"
    }
  ],
  "organizationName": "Organization Name",
  "birthday": {
    "month": 1,
    "day": 30
  },
  "nameSuffix": "Name Suffix",
  "imageDataAvailable": false,
  "contactType": "person",
  "namePrefix": "Name Prefix",
  "jobTitle": "Job Title"
}

NOTE: The birthday key will not be included if the Contact's birthday is not set. Also, it's possible for a Contact's birthday to not include the year. In this case, year will be null.

Thumbnail Image

Thumbnail Image Data is stored in a base64 format and can easily be used with the Image component of React Native as follows:

// contact is a single Contact record retrieved from something like Contacts.getContacts().
var base64ImageUri = 'data:image/png;base64,' + contact.thumbnailImageData;

<Image source={{uri: base64ImageUri}}/>

Troubleshooting

ExampleApp

ExampleApp iOS ExampleApp Android 

As a quick example and a way to prove that it's working as expected with a fresh React Native app, there's an ExampleApp contained in the repository.

One of the best things to do is to make sure that this is working, see how it works and then take what you need to make it work in your own application.

To quickly run the ExampleApp:

  1. git clone git@github.com:joshuapinter/react-native-unified-contacts.git
  2. cd react-native-unified-contacts/ExampleApp
  3. npm install
  4. open ios/ExampleApp.xcodeproject

Select your favourite device and click run.

Other Issues

If you run into trouble, take a look at the following thread:

https://github.com/joshuapinter/react-native-unified-contacts/issues/15

You should also have the latest version of XCode (9.2+) and Swift (4+).

If that doesn't help you, please create an Issue and we'll figure it out together.

TODO

  •  Add Create/Update/Delete methods for Contacts. (Thanks homanp!)
  •  Add Basic Android support.
  •  Add Full Android support.

Download Details:
Author: joshuapinter
Source Code: https://github.com/joshuapinter/react-native-unified-contacts
License: MIT license

#react  #reactnative  #mobileapp  #javascript #java 

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Unified Contacts for React Native Apps
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Carmen  Grimes

Carmen Grimes

1595498460

Contact Tracing App: The Technology, Approach to fight COVID-19/Corona

As COVID-19 staggeringly lands blows to nations across the world, governments are considering ways to see their citizens through this pandemic. At the moment, a WHO situation report clocks the number of confirmed cases above two million along with more than one hundred thousand deaths. With vaccines dubbed as the best possible chance to tackle COVID-19 having no precise time frame of being ready, the talk is quickly shifting away to Contact Tracing Applications.

Contact tracing apps are digital solutions that use mobile technology to power the process of manual contact tracing. The apps follow a user’s movement, either by the use of Bluetooth technology, QR codes, or geo-location data while also tracking and keeping data from other user phones nearby. If one user gets diagnosed, the apps alert other users that they may have been exposed to the virus. As such, Contact Tracing Applications are being welcomed and perceived as an important approach to stem the spread of COVID-19 by providing a more accurate platform with data and information about affected individuals.

How Contact Tracing App Works

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As mentioned above, contact tracing apps leverage mobile technology to trace cases of possible infection more accurately. But how exactly? Once installed and operative, the phone runs the app simultaneously with Bluetooth or location data to transmit signals with unique keys or IDs to phones in the designated range of connection. Similarly, the other phones with the app installed to detect and send back the signals.

For instance, if ‘Individual A’ has the app installed and goes outdoors to run some errands, they will interact with other individuals. In such a case, supposing all the other individuals had functional Contact Tracing Apps, each phone would exchange and store the contact data anonymously. It is important to note that the data collected only covers the app range distance to disregard irrelevant contacts and that their keys repeatedly change as individuals move. In any event that ‘Individual A’ tests positive for COVID-19 through confirmed tests, users who were previously within the proximity of ‘Individual A’ are alerted. Consequently, they are notified to check for symptoms, self-isolate, or get tested. Each time a person tests positive, the app notifies and advises the affected individuals.

In a nutshell, Contact Tracing Apps automate and supplement the traditional concept of tracing contacts to achieve extensive and realistic results in the least time possible.

What are the Benefits of Contact Tracing Apps?

Contract Tracing Apps are assets that offer indispensable solutions to health institutions and the public against COVID-19. There are several reasons why many governments are urging their citizens to use digital contact tracing apps to combat the spread of COVID-19. They include:

  1. The apps are more effective than manual tracing. While not perfect, their predictive algorithms frequently observe individuals detect new cases and analyze the probability one was infected. If one has contact with an asymptomatic individual, they are immediately notified and advised accordingly. Therefore, this saves time, energy, and resources that would have otherwise been overused.
  2. Contact tracing apps facilitate the relaxation of imposed restrictions or lockdowns. With a large number of infected people identified by the apps and put under surveillance, healthy citizens can be allowed to go about their duties. This may be a significant turning point to try and revive economies.
  3. Users’ private data is encrypted and secured. Even if you test positive, other users will only get notifications of possible infections. Your information is protected from both other users and developers of the app.
  4. They will increase the capacity to test and detect COVID-19 cases. With infected users alert, users who come in contact with affected persons come forward to be tested and treated with a higher recovery chance.

Future of Contact Tracing Apps?

Currently, the role of contact tracing apps is limited to accurately identifying infected individuals and their contacts as well as facilitating a quicker response to the Covid-19 threat.

Beyond that, the use of contact tracing apps is projected to take a different turn. One key area bound to change is how people’s privacy is handled. Tech institutions are under growing pressure to devise ways to develop privacy-preserving Contact Tracing Apps.

This will earn the users-trust, which is a pillar for these apps to help contain the disease. Technically, the technology will also have to improve drastically. The apps will have to seamlessly integrate with the user’s phone lifestyle causing minimal or no interference. With most applications having an open-source code, Artificial Intelligence, Beacon Technology, and Big Data solutions will be increasingly harnessed to power and improve them. The apps may also cut across various types of industries apart from health institutions.

How Can It Help to Trace COVID-19 and Reduce the Spread of the Virus?

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Contact Tracing Apps will effectively help stem lowering the cases of COVID-19. By using the apps, officials are able to monitor high-risk individuals easily. Also, should any new case arise, both users and health officials get notified they will swiftly act to trace, test, or isolate infected individuals.

Unlike traditional contact tracing, which may not get all contacts, these apps ensure that once Covid-19 cases are detected, they are all treated early, and those other individuals are not exposed to the infection. They also ward off users from high-risk areas. In the long run, they help break the COVID-19 chain by preventing further spread. Illustratively, an online publication by  CNBC states that more than 500,000 using a Singapore-registered mobile number downloaded the TraceTogether app within the first 24 hours of its launch. Subsequently, together with other government efforts, Singapore has since lowered the infection rate and eased restrictions.

If Contact Tracing Apps are implemented and used alongside other policies, we may as well be a few steps way to curbing this virus.

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