Add Pay NCCO (#330)

* Test suite

* remove unused constant

src/Voice/NCCO/Action/Connect.php

@@ -66,10 +66,7 @@ public function __construct(EndpointInterface $endpoint)
         $this->endpoint = $endpoint;
     }
 
-    /**
-     * @todo Remove the $data parameter as it's useless
-     */
-    public static function factory(EndpointInterface $endpoint, array $data = []): Connect
+    public static function factory(EndpointInterface $endpoint): Connect
     {
         return new Connect($endpoint);
     }

src/Voice/NCCO/Action/Pay.php

@@ -0,0 +1,206 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Vonage\Voice\NCCO\Action;
+
+use InvalidArgumentException;
+
+class Pay implements ActionInterface
+{
+    protected const PERMITTED_VOICE_KEYS = ['language', 'style'];
+
+    protected const PERMITTED_ERROR_KEYS = [
+        'CardNumber' => [
+            'InvalidCardType',
+            'InvalidCardNumber',
+            'Timeout'
+        ],
+        'ExpirationDate' => [
+            'InvalidExpirationDate',
+            'Timeout'
+        ],
+        'SecurityCode' => [
+            'InvalidSecurityCode',
+            'Timeout'
+        ]
+    ];
+
+    /**
+     * @var float
+     */
+    protected float $amount;
+
+    /**
+     * @var string
+     */
+    protected string $currency;
+
+    /**
+     * @var string
+     */
+    protected string $eventUrl;
+
+    /**
+     * @var array
+     */
+    protected array $prompts;
+
+    /**
+     * @var array
+     */
+    protected array $voice;
+
+    /**
+     * @return float
+     */
+    public function getAmount(): float
+    {
+        return $this->amount;
+    }
+
+    public function setAmount(float $amount): void
+    {
+        $this->amount = $amount;
+    }
+
+    public function getCurrency(): ?string
+    {
+        return $this->currency;
+    }
+
+    public function setCurrency(?string $currency): void
+    {
+        $this->currency = $currency;
+    }
+
+    public function getEventUrl(): ?string
+    {
+        return $this->eventUrl;
+    }
+
+    public function setEventUrl(string $eventUrl): void
+    {
+        $this->eventUrl = $eventUrl;
+    }
+
+    /**
+     * @return array
+     */
+    public function getPrompts(): array
+    {
+        return $this->prompts;
+    }
+
+    public function setPrompts(array $prompts): void
+    {
+        if (!array_key_exists('type', $prompts)) {
+            throw new InvalidArgumentException('type is required when setting a text prompt.');
+        }
+
+        if (!array_key_exists($prompts['type'], self::PERMITTED_ERROR_KEYS)) {
+            throw new InvalidArgumentException('invalid prompt type.');
+        }
+
+        if (!array_key_exists('text', $prompts)) {
+            throw new InvalidArgumentException('text is required when setting error text prompts..');
+        }
+
+        if (!array_key_exists('errors', $prompts)) {
+            throw new InvalidArgumentException('error settings are required when setting am error text prompt.');
+        }
+
+        foreach ($prompts['errors'] as $errorPromptKey => $errorPromptData) {
+            if (!array_key_exists('text', $errorPromptData)) {
+                throw new InvalidArgumentException('text is required when setting error text prompts.');
+            }
+
+            $permittedErrors = self::PERMITTED_ERROR_KEYS[$prompts['type']];
+
+            if (!in_array($errorPromptKey, $permittedErrors, true)) {
+                throw new InvalidArgumentException('incorrect error type for prompt.');
+            }
+        }
+
+        $this->prompts = $prompts;
+    }
+
+    /**
+     * @return ?array
+     */
+    public function getVoice(): array
+    {
+        return $this->voice;
+    }
+
+    public function setVoice(array $settings): void
+    {
+        foreach (array_keys($settings) as $settingKey) {
+            if (!in_array($settingKey, self::PERMITTED_VOICE_KEYS, true)) {
+                throw new InvalidArgumentException($settingKey . ' did not fall under permitted voice settings');
+            }
+        }
+
+        $this->voice = $settings;
+    }
+
+    public function toNCCOArray(): array
+    {
+        $data = [
+            'action' => 'pay',
+            'amount' => $this->getAmount()
+        ];
+
+        if (isset($this->currency)) {
+            $data['currency'] = $this->getCurrency();
+        }
+
+        if (isset($this->eventUrl)) {
+            $data['eventUrl'] = $this->getEventUrl();
+        }
+
+        if (isset($this->prompts)) {
+            $data['prompts'] = $this->getPrompts();
+        }
+
+        if (isset($this->voice)) {
+            $data['voice'] = $this->getVoice();
+        }
+
+        return $data;
+    }
+
+    public function jsonSerialize(): array
+    {
+        return $this->toNCCOArray();
+    }
+
+    public static function factory(array $data): Pay
+    {
+        $pay = new self();
+
+        if (array_key_exists('amount', $data)) {
+            $pay->setAmount($data['amount']);
+        } else {
+            throw new InvalidArgumentException('Amount is required for this action.');
+        }
+
+        if (array_key_exists('currency', $data)) {
+            $pay->setCurrency($data['currency']);
+        }
+
+        if (array_key_exists('eventUrl', $data)) {
+            $pay->setEventUrl($data['eventUrl']);
+        }
+
+        if (array_key_exists('prompts', $data)) {
+            $pay->setPrompts($data['prompts']);
+        }
+
+        if (array_key_exists('voice', $data)) {
+            $pay->setVoice($data['voice']);
+        }
+
+        return $pay;
+    }
+}