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This commit is contained in:
emmymayo
@@ -0,0 +1,185 @@
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<?php
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namespace Lib\Google;
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include_once 'lib/google/oauth2.php';
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include_once 'config.php';
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class GoogleDrive {
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private const DRIVE_API_BASE = 'https://www.googleapis.com/drive/v3';
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private GoogleOAuth2 $oauth;
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// Required scopes for Drive API
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private const DRIVE_SCOPES = [
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'https://www.googleapis.com/auth/drive.file'
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];
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public function __construct(GoogleOAuth2 $oauth) {
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$this->oauth = $oauth;
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$this->oauth->addScopes(self::DRIVE_SCOPES);
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}
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/**
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* List files and folders in Google Drive
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* @param string|null $folderId Parent folder ID (null for root)
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* @param array $options Additional query parameters
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* @return array
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* @throws \Exception
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*/
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public function listFiles(?string $folderId = null, array $options = []): array {
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try {
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$query = [];
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if ($folderId) {
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$query[] = "'{$folderId}' in parents";
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} else {
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$query[] = "'root' in parents";
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}
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// Add trashed=false to exclude deleted files
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$query[] = "trashed=false";
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// Handle mime type filtering through options
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if (isset($options['mimeTypes'])) {
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$mimeTypes = array_map(function($type) {
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return "mimeType='" . $type . "'";
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}, $options['mimeTypes']);
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$query[] = '(' . implode(' or ', $mimeTypes) . ')';
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unset($options['mimeTypes']); // Remove from options to avoid duplication in params
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}
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$params = array_merge([
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'fields' => 'files(id, name, mimeType, size, modifiedTime, parents)',
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'orderBy' => 'folder,name', // Sort folders first, then by name
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'q' => implode(' and ', $query)
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], $options);
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$response = $this->oauth->makeAuthenticatedRequest(
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self::DRIVE_API_BASE . '/files?' . http_build_query($params)
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);
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return $response;
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} catch (\Exception $e) {
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if ($this->isAuthenticationError($e)) {
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throw new \Exception('Authentication required. Use getAuthorizationUrl() to start the auth flow.', 401);
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}
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throw $e;
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}
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}
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/**
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* Download a file by its ID
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* @param string $fileId
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* @param string|null $mimeType Optional mime type for export (useful for Google Docs)
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* @return string File content
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* @throws \Exception
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*/
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public function downloadFile(string $fileId, ?string $mimeType = null): string {
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try {
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// First, get file metadata to determine if it's a Google Workspace file
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$file = $this->getFile($fileId);
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$isGoogleWorkspaceFile = substr($file['mimeType'], 0, 23) === 'application/vnd.google-apps';
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// For Google Sheets, always use export
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if ($file['mimeType'] === 'application/vnd.google-apps.spreadsheet') {
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$endpoint = self::DRIVE_API_BASE . '/files/' . $fileId . '/export';
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$endpoint .= '?mimeType=' . urlencode('text/csv');
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return $this->oauth->makeAuthenticatedRequest(
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$endpoint,
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'GET',
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['Accept: text/csv'],
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null,
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true
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);
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}
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// For other files, use regular download
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$endpoint = self::DRIVE_API_BASE . '/files/' . $fileId;
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if ($isGoogleWorkspaceFile && $mimeType) {
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$endpoint .= '/export';
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$endpoint .= '?mimeType=' . urlencode($mimeType);
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} else {
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$endpoint .= '?alt=media';
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}
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return $this->oauth->makeAuthenticatedRequest(
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$endpoint,
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'GET',
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['Accept: */*'],
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null,
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true
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);
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} catch (\Exception $e) {
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if ($this->isAuthenticationError($e)) {
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throw new \Exception('Authentication required. Use getAuthorizationUrl() to start the auth flow.', 401);
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}
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throw $e;
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}
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}
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/**
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* Get file metadata
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* @param string $fileId
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* @return array
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* @throws \Exception
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*/
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public function getFile(string $fileId): array {
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try {
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return $this->oauth->makeAuthenticatedRequest(
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self::DRIVE_API_BASE . '/files/' . $fileId . '?fields=id,name,mimeType,size,modifiedTime,parents'
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);
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} catch (\Exception $e) {
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if ($this->isAuthenticationError($e)) {
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throw new \Exception('Authentication required. Use getAuthorizationUrl() to start the auth flow.', 401);
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}
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throw $e;
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}
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}
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/**
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* Get authorization URL to start OAuth flow
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* @param array $additionalParams
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* @return string
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*/
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public function getAuthorizationUrl(array $additionalParams = []): string {
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return $this->oauth->getAuthorizationUrl($additionalParams);
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}
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/**
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* Check if the error is related to authentication
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* @param \Exception $e
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* @return bool
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*/
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private function isAuthenticationError(\Exception $e): bool {
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return $e->getCode() === 401 || $e->getCode() === 403;
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}
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/**
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* Get common MIME types for Google Workspace files
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* @return array
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*/
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public static function getCommonExportMimeTypes(): array {
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return [
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'application/vnd.google-apps.spreadsheet' => [
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'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
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'csv' => 'text/csv',
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'pdf' => 'application/pdf'
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],
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'application/vnd.google-apps.document' => [
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'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
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'pdf' => 'application/pdf',
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'txt' => 'text/plain'
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],
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'application/vnd.google-apps.presentation' => [
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'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
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'pdf' => 'application/pdf'
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]
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];
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}
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}
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// Initialize the service
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// $oauth = new GoogleOAuth2($clientId, $clientSecret, $redirectUri);
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// $drive = new GoogleDrive($oauth);
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@@ -0,0 +1,207 @@
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<?php
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namespace Lib\Google;
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class GoogleOAuth2 {
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private string $clientId;
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private string $clientSecret;
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private string $redirectUri;
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private array $scopes = [];
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private ?string $accessToken = null;
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private ?string $refreshToken = null;
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private ?int $tokenExpires = null;
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private const AUTH_URL = 'https://accounts.google.com/o/oauth2/v2/auth';
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private const TOKEN_URL = 'https://oauth2.googleapis.com/token';
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public function __construct(string $clientId, string $clientSecret, string $redirectUri) {
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$this->clientId = $clientId;
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$this->clientSecret = $clientSecret;
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$this->redirectUri = $redirectUri;
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}
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/**
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* Add scopes for the OAuth2 request
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* @param array $scopes Array of Google OAuth2 scopes
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* @return self
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*/
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public function addScopes(array $scopes): self {
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$this->scopes = array_merge($this->scopes, $scopes);
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return $this;
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}
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/**
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* Generate the authorization URL
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* @param array $additionalParams Additional URL parameters
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* @return string
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*/
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public function getAuthorizationUrl(array $additionalParams = []): string {
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$params = array_merge([
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'client_id' => $this->clientId,
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'redirect_uri' => $this->redirectUri,
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'response_type' => 'code',
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'access_type' => 'offline',
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'prompt' => 'consent',
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'scope' => implode(' ', array_unique($this->scopes))
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], $additionalParams);
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return self::AUTH_URL . '?' . http_build_query($params);
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}
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/**
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* Exchange authorization code for tokens
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* @param string $code Authorization code
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* @return array Token response
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* @throws \Exception
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*/
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public function exchangeCode(string $code): array {
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$response = $this->makeTokenRequest([
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'grant_type' => 'authorization_code',
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'code' => $code,
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'redirect_uri' => $this->redirectUri
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]);
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$this->setTokens($response);
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return $response;
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}
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/**
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* Refresh the access token
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* @throws \Exception
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*/
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public function refreshAccessToken(): array {
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if (!$this->refreshToken) {
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throw new \Exception('No refresh token available');
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}
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$response = $this->makeTokenRequest([
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'grant_type' => 'refresh_token',
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'refresh_token' => $this->refreshToken
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]);
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$this->setTokens($response);
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return $response;
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}
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/**
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* Make an authenticated request to Google APIs
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* @param string $url
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* @param string $method
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* @param array $headers
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* @param mixed $body
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* @param bool $rawResponse Whether to return raw response instead of JSON
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* @return array|string
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* @throws \Exception
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*/
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public function makeAuthenticatedRequest(
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string $url,
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string $method = 'GET',
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array $headers = [],
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$body = null,
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bool $rawResponse = false
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){
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if ($this->isTokenExpired()) {
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$this->refreshAccessToken();
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}
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$headers = array_merge([
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'Authorization: Bearer ' . $this->accessToken,
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'Accept: application/json'
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], $headers);
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$ch = curl_init();
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curl_setopt_array($ch, [
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CURLOPT_URL => $url,
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_HTTPHEADER => $headers,
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CURLOPT_CUSTOMREQUEST => $method
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]);
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if ($body && in_array($method, ['POST', 'PUT', 'PATCH'])) {
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curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($body));
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}
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$response = curl_exec($ch);
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$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($httpCode >= 400) {
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throw new \Exception('Request failed with status ' . $httpCode . ': ' . $response);
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}
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return $rawResponse ? $response : json_decode($response, true);
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}
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/**
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* Set tokens from OAuth2 response
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* @param array $response
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*/
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private function setTokens(array $response): void {
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$this->accessToken = $response['access_token'];
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if (isset($response['refresh_token'])) {
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$this->refreshToken = $response['refresh_token'];
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}
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$this->tokenExpires = time() + ($response['expires_in'] ?? 3600);
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}
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/**
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* Check if the current access token is expired
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* @return bool
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*/
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private function isTokenExpired(): bool {
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return !$this->accessToken || !$this->tokenExpires || time() >= $this->tokenExpires;
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}
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/**
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* Make a token request to Google's OAuth2 server
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* @param array $params
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* @return array
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* @throws \Exception
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*/
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private function makeTokenRequest(array $params): array {
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$params = array_merge([
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'client_id' => $this->clientId,
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'client_secret' => $this->clientSecret
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], $params);
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$ch = curl_init();
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curl_setopt_array($ch, [
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CURLOPT_URL => self::TOKEN_URL,
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_POST => true,
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CURLOPT_POSTFIELDS => http_build_query($params),
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CURLOPT_HTTPHEADER => ['Content-Type: application/x-www-form-urlencoded']
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]);
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$response = curl_exec($ch);
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$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($httpCode !== 200) {
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throw new \Exception('Token request failed with status ' . $httpCode . ': ' . $response);
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}
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return json_decode($response, true);
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}
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// Getters for tokens and expiration
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public function getAccessToken(): ?string {
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return $this->accessToken;
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}
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public function setAccessToken(string $accessToken): void {
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$this->accessToken = $accessToken;
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}
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public function getRefreshToken(): ?string {
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return $this->refreshToken;
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}
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public function setRefreshToken(string $refreshToken): void {
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$this->refreshToken = $refreshToken;
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}
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public function getTokenExpires(): ?int {
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return $this->tokenExpires;
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}
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}
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