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| 1 | <?php |
| 2 | |
| 3 | namespace BuyerKiosk\ConstantContact\Controllers; |
| 4 | |
| 5 | /** |
| 6 | * Constant Contact Service |
| 7 | * |
| 8 | * Handles OAuth 2.0 authentication and API operations for Constant Contact V3 API. |
| 9 | * Supports the Authorization Code flow with refresh tokens. |
| 10 | * |
| 11 | * @see https://developer.constantcontact.com/api_guide/auth_overview.html |
| 12 | */ |
| 13 | class ConstantContactService |
| 14 | { |
| 15 | /** @var \Store */ |
| 16 | private $store; |
| 17 | |
| 18 | /** @var string Authorization endpoint */ |
| 19 | const AUTH_URL = 'https://authz.constantcontact.com/oauth2/default/v1/authorize'; |
| 20 | |
| 21 | /** @var string Token endpoint */ |
| 22 | const TOKEN_URL = 'https://authz.constantcontact.com/oauth2/default/v1/token'; |
| 23 | |
| 24 | /** @var string API base URL */ |
| 25 | const API_BASE_URL = 'https://api.cc.email/v3'; |
| 26 | |
| 27 | /** @var int Access token lifetime in seconds (24 hours minus buffer) */ |
| 28 | const TOKEN_LIFETIME = 82800; // 23 hours |
| 29 | |
| 30 | /** @var string Required OAuth scopes */ |
| 31 | const SCOPES = 'contact_data campaign_data offline_access'; |
| 32 | |
| 33 | /** |
| 34 | * Constructor |
| 35 | * |
| 36 | * @param \Store $store |
| 37 | */ |
| 38 | public function __construct(\Store $store) |
| 39 | { |
| 40 | $this->store = $store; |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Check if OAuth credentials are configured in environment |
| 45 | * |
| 46 | * @return bool |
| 47 | */ |
| 48 | public function isConfigured(): bool |
| 49 | { |
| 50 | return !empty($_ENV['CC_CLIENT_ID']) && !empty($_ENV['CC_CLIENT_SECRET']); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Check if the store has a valid connection |
| 55 | * |
| 56 | * @return bool |
| 57 | */ |
| 58 | public function isConnected(): bool |
| 59 | { |
| 60 | return $this->store->getCcEnabled() && |
| 61 | !empty($this->store->getCcToken()) && |
| 62 | !empty($this->store->getCcRefreshToken()); |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Get the Client ID from environment |
| 67 | * |
| 68 | * @return string|null |
| 69 | */ |
| 70 | private function getClientId(): ?string |
| 71 | { |
| 72 | return $_ENV['CC_CLIENT_ID'] ?? null; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * Get the Client Secret from environment |
| 77 | * |
| 78 | * @return string|null |
| 79 | */ |
| 80 | private function getClientSecret(): ?string |
| 81 | { |
| 82 | return $_ENV['CC_CLIENT_SECRET'] ?? null; |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Get the application domain for callbacks |
| 87 | * |
| 88 | * @return string |
| 89 | */ |
| 90 | public static function getAppDomain(): string |
| 91 | { |
| 92 | return $_ENV['APP_DOMAIN'] ?? 'https://www.buyerkiosk.com'; |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Get the OAuth redirect URI |
| 97 | * |
| 98 | * @return string |
| 99 | */ |
| 100 | public function getRedirectUri(): string |
| 101 | { |
| 102 | return self::getAppDomain() . '/api/ccCallback.php'; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Generate and store OAuth state parameter for CSRF protection |
| 107 | * |
| 108 | * @return string |
| 109 | */ |
| 110 | public function generateOAuthState(): string |
| 111 | { |
| 112 | $stateData = [ |
| 113 | 'typeNum' => $this->store->getTypeNum(), |
| 114 | 'timestamp' => time(), |
| 115 | 'nonce' => bin2hex(random_bytes(16)) |
| 116 | ]; |
| 117 | |
| 118 | $stateJson = json_encode($stateData); |
| 119 | $state = base64_encode($stateJson); |
| 120 | |
| 121 | // Store in session for validation |
| 122 | if (session_status() === PHP_SESSION_NONE) { |
| 123 | session_start(); |
| 124 | } |
| 125 | $_SESSION['cc_oauth_state'] = $state; |
| 126 | $_SESSION['cc_oauth_state_time'] = time(); |
| 127 | |
| 128 | return $state; |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Validate OAuth state parameter |
| 133 | * |
| 134 | * @param string $state |
| 135 | * @return array|null Returns state data if valid, null otherwise |
| 136 | */ |
| 137 | public static function validateOAuthState(string $state): ?array |
| 138 | { |
| 139 | if (session_status() === PHP_SESSION_NONE) { |
| 140 | session_start(); |
| 141 | } |
| 142 | |
| 143 | // Check if state matches |
| 144 | if (!isset($_SESSION['cc_oauth_state']) || $_SESSION['cc_oauth_state'] !== $state) { |
| 145 | return null; |
| 146 | } |
| 147 | |
| 148 | // Check if state is not expired (15 minute window) |
| 149 | $stateTime = $_SESSION['cc_oauth_state_time'] ?? 0; |
| 150 | if (time() - $stateTime > 900) { |
| 151 | return null; |
| 152 | } |
| 153 | |
| 154 | // Clear the state |
| 155 | unset($_SESSION['cc_oauth_state'], $_SESSION['cc_oauth_state_time']); |
| 156 | |
| 157 | // Decode and return state data |
| 158 | $stateJson = base64_decode($state); |
| 159 | return json_decode($stateJson, true); |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * Get the authorization URL for OAuth flow |
| 164 | * |
| 165 | * @return string |
| 166 | */ |
| 167 | public function getAuthorizationUrl(): string |
| 168 | { |
| 169 | $state = $this->generateOAuthState(); |
| 170 | |
| 171 | $params = [ |
| 172 | 'client_id' => $this->getClientId(), |
| 173 | 'redirect_uri' => $this->getRedirectUri(), |
| 174 | 'response_type' => 'code', |
| 175 | 'scope' => self::SCOPES, |
| 176 | 'state' => $state |
| 177 | ]; |
| 178 | |
| 179 | return self::AUTH_URL . '?' . http_build_query($params); |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * Exchange authorization code for access tokens |
| 184 | * |
| 185 | * @param string $code Authorization code from callback |
| 186 | * @return bool Success status |
| 187 | */ |
| 188 | public function exchangeCodeForTokens(string $code): bool |
| 189 | { |
| 190 | $postData = [ |
| 191 | 'grant_type' => 'authorization_code', |
| 192 | 'code' => $code, |
| 193 | 'redirect_uri' => $this->getRedirectUri() |
| 194 | ]; |
| 195 | |
| 196 | $response = $this->makeTokenRequest($postData); |
| 197 | |
| 198 | if (!$response || !isset($response['access_token'])) { |
| 199 | error_log("Constant Contact: Failed to exchange code for tokens"); |
| 200 | return false; |
| 201 | } |
| 202 | |
| 203 | return $this->saveTokens($response); |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Refresh the access token using refresh token |
| 208 | * |
| 209 | * @return bool Success status |
| 210 | */ |
| 211 | public function refreshAccessToken(): bool |
| 212 | { |
| 213 | $refreshToken = $this->store->getCcRefreshToken(); |
| 214 | if (empty($refreshToken)) { |
| 215 | error_log("Constant Contact: No refresh token available for store " . $this->store->getTypeNum()); |
| 216 | return false; |
| 217 | } |
| 218 | |
| 219 | $postData = [ |
| 220 | 'grant_type' => 'refresh_token', |
| 221 | 'refresh_token' => $refreshToken |
| 222 | ]; |
| 223 | |
| 224 | $response = $this->makeTokenRequest($postData); |
| 225 | |
| 226 | if (!$response || !isset($response['access_token'])) { |
| 227 | error_log("Constant Contact: Failed to refresh token for store " . $this->store->getTypeNum()); |
| 228 | return false; |
| 229 | } |
| 230 | |
| 231 | return $this->saveTokens($response); |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Make a token request to the OAuth server |
| 236 | * |
| 237 | * @param array $postData |
| 238 | * @return array|null |
| 239 | */ |
| 240 | private function makeTokenRequest(array $postData): ?array |
| 241 | { |
| 242 | $clientId = $this->getClientId(); |
| 243 | $clientSecret = $this->getClientSecret(); |
| 244 | |
| 245 | if (!$clientId || !$clientSecret) { |
| 246 | error_log("Constant Contact: Missing client credentials"); |
| 247 | return null; |
| 248 | } |
| 249 | |
| 250 | $ch = curl_init(self::TOKEN_URL); |
| 251 | curl_setopt_array($ch, [ |
| 252 | CURLOPT_RETURNTRANSFER => true, |
| 253 | CURLOPT_POST => true, |
| 254 | CURLOPT_POSTFIELDS => http_build_query($postData), |
| 255 | CURLOPT_HTTPHEADER => [ |
| 256 | 'Content-Type: application/x-www-form-urlencoded', |
| 257 | 'Authorization: Basic ' . base64_encode($clientId . ':' . $clientSecret) |
| 258 | ], |
| 259 | CURLOPT_TIMEOUT => 30 |
| 260 | ]); |
| 261 | |
| 262 | $response = curl_exec($ch); |
| 263 | $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE); |
| 264 | $error = curl_error($ch); |
| 265 | curl_close($ch); |
| 266 | |
| 267 | if ($error) { |
| 268 | error_log("Constant Contact: cURL error - " . $error); |
| 269 | return null; |
| 270 | } |
| 271 | |
| 272 | if ($httpCode !== 200) { |
| 273 | error_log("Constant Contact: Token request failed with HTTP " . $httpCode . " - " . $response); |
| 274 | return null; |
| 275 | } |
| 276 | |
| 277 | return json_decode($response, true); |
| 278 | } |
| 279 | |
| 280 | /** |
| 281 | * Save tokens to the store record |
| 282 | * |
| 283 | * @param array $tokenResponse |
| 284 | * @return bool |
| 285 | */ |
| 286 | private function saveTokens(array $tokenResponse): bool |
| 287 | { |
| 288 | $accessToken = $tokenResponse['access_token'] ?? null; |
| 289 | $refreshToken = $tokenResponse['refresh_token'] ?? null; |
| 290 | $expiresIn = $tokenResponse['expires_in'] ?? self::TOKEN_LIFETIME; |
| 291 | |
| 292 | if (!$accessToken) { |
| 293 | return false; |
| 294 | } |
| 295 | |
| 296 | // Calculate expiration time |
| 297 | $expiration = date('Y-m-d H:i:s', time() + $expiresIn); |
| 298 | |
| 299 | // Update store tokens |
| 300 | $this->store->setCcToken($accessToken); |
| 301 | if ($refreshToken) { |
| 302 | $this->store->setCcRefreshToken($refreshToken); |
| 303 | } |
| 304 | $this->store->setCcTokenExpiration($expiration); |
| 305 | $this->store->setCcEnabled(1); |
| 306 | |
| 307 | return $this->store->updateCcTokens(); |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * Get a valid access token, refreshing if necessary |
| 312 | * |
| 313 | * @return string|null |
| 314 | */ |
| 315 | public function getValidAccessToken(): ?string |
| 316 | { |
| 317 | if (!$this->isConnected()) { |
| 318 | return null; |
| 319 | } |
| 320 | |
| 321 | // Check if token is expired or will expire soon (within 5 minutes) |
| 322 | $expiration = $this->store->getCcTokenExpiration(); |
| 323 | if ($expiration) { |
| 324 | $expirationTime = strtotime($expiration); |
| 325 | if ($expirationTime && (time() + 300) >= $expirationTime) { |
| 326 | // Token is expired or expiring soon, refresh it |
| 327 | if (!$this->refreshAccessToken()) { |
| 328 | return null; |
| 329 | } |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | return $this->store->getCcToken(); |
| 334 | } |
| 335 | |
| 336 | /** |
| 337 | * Make an API request to Constant Contact |
| 338 | * |
| 339 | * @param string $method HTTP method |
| 340 | * @param string $endpoint API endpoint (without base URL) |
| 341 | * @param array|null $data Request data |
| 342 | * @return array|null |
| 343 | */ |
| 344 | public function apiRequest(string $method, string $endpoint, ?array $data = null): ?array |
| 345 | { |
| 346 | $accessToken = $this->getValidAccessToken(); |
| 347 | if (!$accessToken) { |
| 348 | error_log("Constant Contact: No valid access token for API request"); |
| 349 | return null; |
| 350 | } |
| 351 | |
| 352 | $url = self::API_BASE_URL . $endpoint; |
| 353 | |
| 354 | $headers = [ |
| 355 | 'Authorization: Bearer ' . $accessToken, |
| 356 | 'Content-Type: application/json', |
| 357 | 'Accept: application/json' |
| 358 | ]; |
| 359 | |
| 360 | $ch = curl_init(); |
| 361 | curl_setopt_array($ch, [ |
| 362 | CURLOPT_URL => $url, |
| 363 | CURLOPT_RETURNTRANSFER => true, |
| 364 | CURLOPT_HTTPHEADER => $headers, |
| 365 | CURLOPT_TIMEOUT => 30 |
| 366 | ]); |
| 367 | |
| 368 | switch (strtoupper($method)) { |
| 369 | case 'POST': |
| 370 | curl_setopt($ch, CURLOPT_POST, true); |
| 371 | if ($data) { |
| 372 | curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data)); |
| 373 | } |
| 374 | break; |
| 375 | case 'PUT': |
| 376 | curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'PUT'); |
| 377 | if ($data) { |
| 378 | curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data)); |
| 379 | } |
| 380 | break; |
| 381 | case 'DELETE': |
| 382 | curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'DELETE'); |
| 383 | break; |
| 384 | case 'GET': |
| 385 | default: |
| 386 | if ($data) { |
| 387 | curl_setopt($ch, CURLOPT_URL, $url . '?' . http_build_query($data)); |
| 388 | } |
| 389 | break; |
| 390 | } |
| 391 | |
| 392 | $response = curl_exec($ch); |
| 393 | $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE); |
| 394 | $error = curl_error($ch); |
| 395 | curl_close($ch); |
| 396 | |
| 397 | if ($error) { |
| 398 | error_log("Constant Contact API: cURL error - " . $error); |
| 399 | return null; |
| 400 | } |
| 401 | |
| 402 | if ($httpCode >= 400) { |
| 403 | error_log("Constant Contact API: Request failed with HTTP " . $httpCode . " - " . $response); |
| 404 | // Throw exception with error details so caller can handle it |
| 405 | throw new \Exception("Constant Contact API: Request failed with HTTP " . $httpCode . " - " . $response); |
| 406 | } |
| 407 | |
| 408 | return json_decode($response, true); |
| 409 | } |
| 410 | |
| 411 | /** |
| 412 | * Get account info for the connected user |
| 413 | * |
| 414 | * @return array|null |
| 415 | */ |
| 416 | public function getAccountInfo(): ?array |
| 417 | { |
| 418 | return $this->apiRequest('GET', '/account/summary'); |
| 419 | } |
| 420 | |
| 421 | /** |
| 422 | * Get all contact lists |
| 423 | * |
| 424 | * @return array |
| 425 | */ |
| 426 | public function getLists(): array |
| 427 | { |
| 428 | $response = $this->apiRequest('GET', '/contact_lists', [ |
| 429 | 'include_count' => 'true', |
| 430 | 'status' => 'active' |
| 431 | ]); |
| 432 | |
| 433 | return $response['lists'] ?? []; |
| 434 | } |
| 435 | |
| 436 | /** |
| 437 | * Create a new contact list |
| 438 | * |
| 439 | * @param string $name List name |
| 440 | * @param string|null $description Optional description |
| 441 | * @return array|null The created list or null on failure |
| 442 | */ |
| 443 | public function createList(string $name, ?string $description = null): ?array |
| 444 | { |
| 445 | $data = [ |
| 446 | 'name' => $name, |
| 447 | 'favorite' => false |
| 448 | ]; |
| 449 | |
| 450 | if ($description) { |
| 451 | $data['description'] = $description; |
| 452 | } |
| 453 | |
| 454 | return $this->apiRequest('POST', '/contact_lists', $data); |
| 455 | } |
| 456 | |
| 457 | /** |
| 458 | * Get a specific contact list by ID |
| 459 | * |
| 460 | * @param string $listId |
| 461 | * @return array|null |
| 462 | */ |
| 463 | public function getList(string $listId): ?array |
| 464 | { |
| 465 | return $this->apiRequest('GET', '/contact_lists/' . $listId); |
| 466 | } |
| 467 | |
| 468 | /** |
| 469 | * Add or update a contact |
| 470 | * |
| 471 | * @param string $email |
| 472 | * @param string $firstName |
| 473 | * @param string $lastName |
| 474 | * @param string|null $listId Optional list ID to add contact to |
| 475 | * @return array|null |
| 476 | */ |
| 477 | public function upsertContact(string $email, string $firstName, string $lastName, ?string $listId = null): ?array |
| 478 | { |
| 479 | // Trim and validate email |
| 480 | $email = trim($email); |
| 481 | $firstName = trim($firstName); |
| 482 | $lastName = trim($lastName); |
| 483 | |
| 484 | // Validate email format |
| 485 | if (!filter_var($email, FILTER_VALIDATE_EMAIL)) { |
| 486 | error_log("Constant Contact: Invalid email format - " . $email . " (hex: " . bin2hex($email) . ")"); |
| 487 | throw new \Exception("Invalid email format: " . $email); |
| 488 | } |
| 489 | |
| 490 | // Note: sign_up_form endpoint handles permission_to_send automatically |
| 491 | // based on the account's Confirmed Opt-In settings |
| 492 | $data = [ |
| 493 | 'email_address' => $email, |
| 494 | 'first_name' => $firstName, |
| 495 | 'last_name' => $lastName, |
| 496 | 'create_source' => 'Account' |
| 497 | ]; |
| 498 | |
| 499 | // Use store's configured list if not specified |
| 500 | if (!$listId) { |
| 501 | $listId = $this->store->getCcList(); |
| 502 | } |
| 503 | |
| 504 | if ($listId) { |
| 505 | $data['list_memberships'] = [$listId]; |
| 506 | } |
| 507 | |
| 508 | return $this->apiRequest('POST', '/contacts/sign_up_form', $data); |
| 509 | } |
| 510 | |
| 511 | /** |
| 512 | * Disconnect the Constant Contact integration |
| 513 | * |
| 514 | * @return bool |
| 515 | */ |
| 516 | public function disconnect(): bool |
| 517 | { |
| 518 | $this->store->setCcToken(null); |
| 519 | $this->store->setCcRefreshToken(null); |
| 520 | $this->store->setCcTokenExpiration(null); |
| 521 | $this->store->setCcEnabled(0); |
| 522 | $this->store->setCcList(null); |
| 523 | |
| 524 | return $this->store->updateCcTokens(); |
| 525 | } |
| 526 | } |