Improved documentation (#3, #4)

README.md

@@ -23,14 +23,85 @@ Just run `composer require rapidwebltd/php-google-contacts-v3-api`.
 
 ## Usage
 
-For extensive usage instructions, please see the blog post I wrote on the subject here: http://www.rapidweb.biz/news/php-library-for-the-google-contacts-api-v3-06102593/
+After the library has been installed and the setup and account association steps have been completed, you can make use of the library.
 
-Also, take a look at the following files for basic examples of how to retrieve contacts. They can also be used to ensure you have currently associated your Google account with the library.
+If your framework does not do this for you, remember to include the require the `vendor/autoload.php` file on any pages you wish to make use of this library on.
 
-* `test.php`
-* `test_individual.php`
+### Retrieving Google Contacts
 
-## Config file override
+The following code will retrieve all contacts from the associated Google account.
+
+```php
+$contacts = rapidweb\googlecontacts\factories\ContactFactory::getAll();
+
+var_dump($contacts);
+```
+
+The `ContactFactory::getAll()` method will return an array of `Contact` objects. The contact's details will be available as public member variables of these objects.
+
+The `selfURL` contained within each `Contact` object is the unique reference to this particular contact. If you need to retrieve a specific contact in the future, you will need to store this `selfURL`.
+
+To retrieve a specific contact (by its selfURL), use the following code.
+
+```
+$selfURL = "...";
+
+$contact = rapidweb\googlecontacts\factories\ContactFactory::getBySelfURL($selfURL);
+
+var_dump($contact);
+```
+
+This `ContactFactory::getBySelfURL` method will return a single `Contact` object.
+
+Google Contact properties are accessed as follows.
+
+```
+$selfURL = "...";
+
+$contact = rapidweb\googlecontacts\factories\ContactFactory::getBySelfURL($selfURL);
+
+echo $contact->name;
+echo $contact->phoneNumber;
+echo $contact->email;
+```
+
+### Updating existing Google Contacts
+
+The updating of Google Contacts using this library is done in a very object orientated manner.
+
+You must first retrieve a `Contact` object using one of the methods mentioned previously. You can then modify the contact object's public member variables. To save these changes back to the Google Contacts service, you then pass the modified object to the `ContactFactory::submitUpdates($contact)` method.
+
+The following code demonstrates in full retrieving a contact, modifying it and submitting the updates.
+
+```
+$selfURL = "...";
+
+$contact = rapidweb\googlecontacts\factories\ContactFactory::getBySelfURL($selfURL);
+
+var_dump($contact);
+
+$contact->name = 'Test';
+$contact->phoneNumber = '07812363789';
+$contact->email = '[email protected]';
+
+$contactAfterUpdate = rapidweb\googlecontacts\factories\ContactFactory::submitUpdates($contact);
+
+var_dump($contactAfterUpdate);
+```
+
+### Creating new Google Contacts
+
+Creating a new Google Contact is very easy. Simply call the `ContactFactory::create($name, $phoneNumber, $emailAddress)` method, passing through appropriate parameters. This method will return the created contact as a `Contact` object including its newly assigned `selfURL`.
+
+```
+$name = "Frodo Baggins";
+$phoneNumber = "06439111222";
+$emailAddress = "[email protected]";
+
+$newContact = rapidweb\googlecontacts\factories\ContactFactory::create($name, $phoneNumber, $emailAddress);
+```
+
+### Config file override
 
 Each method has optional argument for config file override. It is useful when you want to use work with multiple Google accounts at the same time.
 
@@ -47,3 +118,11 @@ $contacts = ContactFactory::getAll($customConfig);
 ```
 
 You have to define all variables as the original config is completely ignored. To be more precise, it doesn't have to exist at all.
+
+
+## Examples
+
+Take a look at the following files for basic examples of how to retrieve contacts. They can also be used to ensure you have currently associated your Google account with the library.
+
+* test.php
+* test_individual.php