Add v4 API Key Support

.github/workflows/tests.yml

@@ -51,6 +51,7 @@ jobs:
             CONVERTKIT_OAUTH_REFRESH_TOKEN=${{ secrets.CONVERTKIT_OAUTH_REFRESH_TOKEN }}
             CONVERTKIT_OAUTH_ACCESS_TOKEN_NO_DATA=${{ secrets.CONVERTKIT_OAUTH_ACCESS_TOKEN_NO_DATA }}
             CONVERTKIT_OAUTH_REFRESH_TOKEN_NO_DATA=${{ secrets.CONVERTKIT_OAUTH_REFRESH_TOKEN_NO_DATA }}
+            CONVERTKIT_API_KEY=${{ secrets.CONVERTKIT_API_KEY }}
             CONVERTKIT_OAUTH_CLIENT_ID=${{ secrets.CONVERTKIT_OAUTH_CLIENT_ID }}
             CONVERTKIT_OAUTH_CLIENT_SECRET=${{ secrets.CONVERTKIT_OAUTH_CLIENT_SECRET }}
             CONVERTKIT_OAUTH_REDIRECT_URI=${{ secrets.CONVERTKIT_OAUTH_REDIRECT_URI }}

README.md

@@ -1,6 +1,6 @@
-# ConvertKit SDK PHP
+# Kit SDK PHP
 
-The ConvertKit PHP SDK provides convinient access to the ConvertKit API from applications written in the PHP language.
+The Kit PHP SDK provides convinient access to the Kit API from applications written in the PHP language.
 
 It includes a pre-defined set of methods for interacting with the API.
 
@@ -10,6 +10,7 @@ It includes a pre-defined set of methods for interacting with the API.
 |-------------|-------------|--------------------|--------------|
 | 1.x         | v3          | API Key and Secret | 7.4+         |
 | 2.x         | v4          | OAuth              | 8.0+         |
+| 2.2+        | v4          | API Key            | 8.0+         |
 
 Refer to [this guide](MIGRATION.md) for changes when upgrading to the v2 SDK.
 
@@ -41,9 +42,9 @@ If you use Composer, these dependencies should be handled automatically.
 
 ### 2.x (v4 API, OAuth, PHP 8.0+)
 
-First, register your OAuth application in the `OAuth Applications` section at https://app.convertkit.com/account_settings/advanced_settings.
+First, register your OAuth application in the `OAuth Applications` section at https://app.kit.com/account_settings/advanced_settings.
 
-Using the supplied Client ID and secret, redirect the user to ConvertKit to grant your application access to their ConvertKit account.
+Using the supplied Client ID and secret, redirect the user to Kit to grant your application access to their Kit account.
 
 ```php
 // Require the autoloader (if you're using a PHP framework, this may already be done for you).
@@ -59,7 +60,7 @@ $api = new \ConvertKit_API\ConvertKit_API(
 header('Location: '.$api->get_oauth_url('<your_redirect_uri>'));
 ```
 
-Once the user grants your application access to their ConvertKit account, they'll be redirected to your Redirect URI with an authorization code. For example:
+Once the user grants your application access to their Kit account, they'll be redirected to your Redirect URI with an authorization code. For example:
 
 `your-redirect-uri?code=<auth_code>`
 
@@ -118,26 +119,40 @@ $api = new \ConvertKit_API\ConvertKit_API(
 API requests may then be performed:
 
 ```php
-$result = $api->add_subscriber_to_form(12345, 'joe.bloggs@convertkit.com');
+$result = $api->add_subscriber_to_form(12345, 'joe.bloggs@kit.com');
 ```
 
 To determine whether a new entity / relationship was created, or an existing entity / relationship updated, inspect the HTTP code of the last request:
 
 ```php
-$result = $api->add_subscriber_to_form(12345, 'joe.bloggs@convertkit.com');
+$result = $api->add_subscriber_to_form(12345, 'joe.bloggs@kit.com');
 $code = $api->getResponseInterface()->getStatusCode(); // 200 OK if e.g. a subscriber already added to the specified form, 201 Created if the subscriber added to the specified form for the first time.
 ```
 
 The PSR-7 response can be fetched and further inspected, if required - for example, to check if a header exists:
 
 ```php
-$result = $api->add_subscriber_to_form(12345, 'joe.bloggs@convertkit.com');
+$result = $api->add_subscriber_to_form(12345, 'joe.bloggs@kit.com');
 $api->getResponseInterface()->hasHeader('Content-Length'); // Check if the last API request included a `Content-Length` header
 ```
 
+### 2.2+ (v4 API, API Key, PHP 8.0+)
+
+Get your Kit API Key and API Secret [here](https://app.kit.com/account_settings/developer_settings) and set it somewhere in your application.
+
+```php
+// Require the autoloader (if you're using a PHP framework, this may already be done for you).
+require_once 'vendor/autoload.php';
+
+// Initialize the API class.
+$api = new \ConvertKit_API\ConvertKit_API(
+    apiKey: '<your_v4_api_key>'
+);
+```
+
 ### 1.x (v3 API, API Key and Secret, PHP 7.4+)
 
-Get your ConvertKit API Key and API Secret [here](https://app.convertkit.com/account/edit) and set it somewhere in your application.
+Get your Kit API Key and API Secret [here](https://app.kit.com/account_settings/developer_settings) and set it somewhere in your application.
 
 ```php
 // Require the autoloader (if you're using a PHP framework, this may already be done for you).
@@ -149,7 +164,7 @@ $api = new \ConvertKit_API\ConvertKit_API('<your_public_api_key>', '<your_secret
 
 ## Handling Errors
 
-The ConvertKit PHP SDK uses Guzzle for all HTTP API requests.  Errors will be thrown as Guzzle's `ClientException` (for 4xx errors),
+The Kit PHP SDK uses Guzzle for all HTTP API requests.  Errors will be thrown as Guzzle's `ClientException` (for 4xx errors),
 or `ServerException` (for 5xx errors).
 
 ```php
@@ -190,4 +205,4 @@ See the [PHP SDK docs](./docs/classes/ConvertKit_API/ConvertKit_API.md)
 
 See our [contributor guide](CONTRIBUTING.md) for setting up your development environment, testing and submitting a PR.
 
-For ConvertKit, refer to the [deployment guide](DEPLOYMENT.md) on how to publish a new release.
+For Kit, refer to the [deployment guide](DEPLOYMENT.md) on how to publish a new release.

composer.json

@@ -30,6 +30,11 @@
       "ConvertKit_API\\": "src/"
     }
   },
+  "autoload-dev": {
+    "psr-4": {
+      "": "tests/"
+    }
+  },
   "minimum-stability": "dev",
   "prefer-stable": true,
   "scripts": {

phpunit.xml

@@ -3,6 +3,7 @@
     <testsuites>
         <testsuite name="ConvertKit API Tests">
             <directory>tests</directory>
+            <exclude>tests/ConvertKitAPITest.php</exclude>
         </testsuite>
     </testsuites>
 </phpunit>

src/ConvertKit_API.php

@@ -62,19 +62,22 @@ class ConvertKit_API
      * @param string  $clientID             OAuth Client ID.
      * @param string  $clientSecret         OAuth Client Secret.
      * @param string  $accessToken          OAuth Access Token.
+     * @param string  $apiKey               API Key.
      * @param boolean $debug                Log requests to debugger.
      * @param string  $debugLogFileLocation Path and filename of debug file to write to.
      */
     public function __construct(
-        string $clientID,
-        string $clientSecret,
+        string $clientID = '',
+        string $clientSecret = '',
         string $accessToken = '',
+        string $apiKey = '',
         bool $debug = false,
         string $debugLogFileLocation = ''
     ) {
         $this->client_id     = $clientID;
         $this->client_secret = $clientSecret;
         $this->access_token  = $accessToken;
+        $this->api_key       = $apiKey;
         $this->debug         = $debug;
 
         // Set the Guzzle client.
@@ -122,22 +125,35 @@ private function create_log(string $message)
             return;
         }
 
-        // Mask the Client ID, Client Secret and Access Token.
-        $message = str_replace(
-            $this->client_id,
-            str_repeat('*', (strlen($this->client_id) - 4)) . substr($this->client_id, - 4),
-            $message
-        );
-        $message = str_replace(
-            $this->client_secret,
-            str_repeat('*', (strlen($this->client_secret) - 4)) . substr($this->client_secret, - 4),
-            $message
-        );
-        $message = str_replace(
-            $this->access_token,
-            str_repeat('*', (strlen($this->access_token) - 4)) . substr($this->access_token, - 4),
-            $message
-        );
+        // Mask the Client ID, Client Secret, Access Token, and API Key.
+        if ($this->client_id) {
+            $message = str_replace(
+                $this->client_id,
+                str_repeat('*', (strlen($this->client_id) - 4)) . substr($this->client_id, - 4),
+                $message
+            );
+        }
+        if ($this->client_secret) {
+            $message = str_replace(
+                $this->client_secret,
+                str_repeat('*', (strlen($this->client_secret) - 4)) . substr($this->client_secret, - 4),
+                $message
+            );
+        }
+        if ($this->access_token) {
+            $message = str_replace(
+                $this->access_token,
+                str_repeat('*', (strlen($this->access_token) - 4)) . substr($this->access_token, - 4),
+                $message
+            );
+        }
+        if ($this->api_key) {
+            $message = str_replace(
+                $this->api_key,
+                str_repeat('*', (strlen($this->api_key) - 4)) . substr($this->api_key, - 4),
+                $message
+            );
+        }
 
         // Mask email addresses that may be contained within the message.
         $message = preg_replace_callback(
@@ -427,7 +443,12 @@ public function get_request_headers(string $type = 'application/json', bool $aut
         }
 
         // Add authorization header and return.
-        $headers['Authorization'] = 'Bearer ' . $this->access_token;
+        if ($this->api_key) {
+            $headers['X-Kit-Api-Key'] = $this->api_key;
+        } else if ($this->access_token) {
+            $headers['Authorization'] = 'Bearer ' . $this->access_token;
+        }
+
         return $headers;
     }
 

src/ConvertKit_API_Traits.php

@@ -33,6 +33,13 @@ trait ConvertKit_API_Traits
      */
     protected $access_token = '';
 
+    /**
+     * API Key
+     *
+     * @var string
+     */
+    protected $api_key = '';
+
     /**
      * OAuth Authorization URL
      *