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public class DevicePhoneNumber {
    public final String phoneNumber;

    public DevicePhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

    @Override
    public String toString() {
        return "DevicePhoneNumber{" +
                "phoneNumber='" + phoneNumber + '\'' +
                '}';
    }
}

public class DeviceUserProfile {
    public final String email;
    public final String firstName;
    public final String lastName;

    public DeviceUserProfile(String email, String firstName, String lastName) {
        this.email = email;
        this.firstName = firstName;
        this.lastName = lastName;
    }

    @Override
    public String toString() {
        return "DeviceUserProfile{" +
                "email='" + email + '\'' +
                ", firstName='" + firstName + '\'' +
                ", lastName='" + lastName + '\'' +
                '}';
    }
}

/**
 * Try to get the current phone number of the device.
 *
 * Requires:
 * <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
 */
public DevicePhoneNumber produceCurrentPhoneNumber() {
    TelephonyManager phoneManager = (TelephonyManager) application.getSystemService(Context.TELEPHONY_SERVICE);
    String phoneNumber = phoneManager.getLine1Number();
    if (!TextUtils.isEmpty(phoneNumber)) {
        return new DevicePhoneNumber(phoneNumber);
    } else {
        return null;
    }
}


/**
 * Get some basic details about the current user.
 *
 * Requires:
 * <uses-permission android:name="android.permission.READ_PROFILE" />
 */
public DeviceUserProfile produceDeviceUserProfile() {
    Cursor cursor = application.getContentResolver().query(
            Uri.withAppendedPath(
                    ContactsContract.Profile.CONTENT_URI,
                    ContactsContract.Contacts.Data.CONTENT_DIRECTORY),
            new String[] {
                    Email.ADDRESS,
                    Email.IS_PRIMARY,
                    Profile.DISPLAY_NAME
            },
            ContactsContract.Contacts.Data.MIMETYPE + " = ?",
            new String[]{ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE},
            ContactsContract.Contacts.Data.IS_PRIMARY + " DESC"
    );
    
    try {
        if (cursor.getCount() > 0) {
            cursor.moveToFirst();
            String email = cursor.getString(0);
            String displayName = cursor.getString(2);
    
            String firstName = null;
            String lastName = null;
            String[] parts = displayName.split(" ");
            // Display name can come back in a bunch of different formats (including e-mail), and
            // so that we don't make an assumption about likely first and last name values (ex:
            // Mary Ann __ Shortname vs Ben __ von Longname, we'll play it conservative and only
            // return it if we have a better degree of confidence in it.
            if (parts.length == 2) {
                firstName = parts[0];
                lastName = parts[1];
            }
    
            return new DeviceUserProfile(email, firstName, lastName);
        }
    
        return null;
    } finally {
        cursor.close();
    }
}