<?php
/*
 * Copyright 2017 Google LLC
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google LLC nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * GENERATED CODE WARNING
 * This file was generated from the file
 * https://github.com/google/googleapis/blob/master/google/longrunning/operations.proto
 * and updates to that file get reflected here through a refresh process.
 *
 * EXPERIMENTAL: This client library class has not yet been declared GA (1.0). This means that
 * even though we intend the surface to be stable, we may make backwards incompatible changes
 * if necessary.
 *
 * @experimental
 */

namespace Google\ApiCore\LongRunning\Gapic;

use Google\ApiCore\ApiException;
use Google\ApiCore\Call;
use Google\ApiCore\GapicClientTrait;
use Google\ApiCore\RetrySettings;
use Google\ApiCore\Transport\TransportInterface;
use Google\LongRunning\CancelOperationRequest;
use Google\LongRunning\DeleteOperationRequest;
use Google\LongRunning\GetOperationRequest;
use Google\LongRunning\ListOperationsRequest;
use Google\LongRunning\ListOperationsResponse;
use Google\LongRunning\Operation;
use Google\Protobuf\GPBEmpty;

/**
 * Service Description: Manages long-running operations with an API service.
 *
 * When an API method normally takes long time to complete, it can be designed
 * to return [Operation][google.longrunning.Operation] to the client, and the client can use this
 * interface to receive the real response asynchronously by polling the
 * operation resource, or pass the operation resource to another API (such as
 * Google Cloud Pub/Sub API) to receive the response.  Any API service that
 * returns long-running operations should implement the `Operations` interface
 * so developers can have a consistent client experience.
 *
 * EXPERIMENTAL: This client library class has not yet been declared GA (1.0). This means that
 * even though we intend the surface to be stable, we may make backwards incompatible changes
 * if necessary.
 *
 * This class provides the ability to make remote calls to the backing service through method
 * calls that map to API methods. Sample code to get started:
 *
 * ```
 * $options = [
 *     'apiEndpoint' => 'my-service-address',
 *     'scopes' => ['my-service-scope'],
 * ];
 * $operationsClient = new OperationsClient($options);
 * try {
 *     $name = '';
 *     $response = $operationsClient->getOperation($name);
 * } finally {
 *     if (isset($operationsClient)) {
 *         $operationsClient->close();
 *     }
 * }
 * ```
 *
 * @experimental
 */
class OperationsGapicClient
{
    use GapicClientTrait;

    /**
     * The name of the service.
     */
    const SERVICE_NAME = 'google.longrunning.Operations';

    /**
     * The default port of the service.
     */
    const DEFAULT_SERVICE_PORT = 443;

    /**
     * The name of the code generator, to be included in the agent header.
     */
    const CODEGEN_NAME = 'gapic';

    private static function getClientDefaults()
    {
        return [
            'serviceName' => self::SERVICE_NAME,
            'clientConfig' => __DIR__.'/../resources/operations_client_config.json',
            'descriptorsConfigPath' => __DIR__.'/../resources/operations_descriptor_config.php',
            'credentialsConfig' => [
            ],
            'transportConfig' => [
                'rest' => [
                    'restClientConfigPath' => __DIR__.'/../resources/operations_rest_client_config.php'
                ],
            ],
        ];
    }

    /**
     * Constructor.
     *
     * @param array $options {
     *                       Required. Options for configuring the service API wrapper. Those options
     *                       that must be provided are marked as Required.
     *
     *     @type string $apiEndpoint
     *           Required. The address of the API remote host. May optionally include the port,
     *           formatted as "<uri>:<port>".
     *     @type string|array $credentials
     *           The credentials to be used by the client to authorize API calls. This option
     *           accepts either a path to a credentials file, or a decoded credentials file as a
     *           PHP array.
     *           *Advanced usage*: In addition, this option can also accept a pre-constructed
     *           \Google\Auth\FetchAuthTokenInterface object or \Google\ApiCore\CredentialsWrapper
     *           object. Note that when one of these objects are provided, any settings in
     *           $credentialsConfig will be ignored.
     *     @type array $credentialsConfig
     *           Options used to configure credentials, including auth token caching, for the client. For
     *           a full list of supporting configuration options, see
     *           \Google\ApiCore\CredentialsWrapper::build.
     *     @type bool $disableRetries
     *           Determines whether or not retries defined by the client configuration should be
     *           disabled. Defaults to `false`.
     *     @type string|array $clientConfig
     *           Client method configuration, including retry settings. This option can be either a
     *           path to a JSON file, or a PHP array containing the decoded JSON data.
     *           By default this settings points to the default client config file, which is provided
     *           in the resources folder.
     *     @type string $transport
     *           The transport used for executing network requests. May be either the string `rest`
     *           or `grpc`. Defaults to `grpc` if gRPC support is detected on the system.
     *           *Advanced usage*: Additionally, it is possible to pass in an already instantiated
     *           TransportInterface object. Note that when this objects is provided, any settings in
     *           $transportConfig, and any $apiEndpoint setting, will be ignored.
     *     @type array $transportConfig
     *           Configuration options that will be used to construct the transport. Options for
     *           each supported transport type should be passed in a key for that transport. For
     *           example:
     *           $transportConfig = [
     *               'grpc' => [...],
     *               'rest' => [...]
     *           ];
     *           See the GrpcTransport::build and RestTransport::build methods for the supported
     *           options.
     * }
     * @experimental
     */
    public function __construct($options = [])
    {
        $clientOptions = $this->buildClientOptions($options);
        $this->setClientOptions($clientOptions);
    }

    /**
     * Gets the latest state of a long-running operation.  Clients can use this
     * method to poll the operation result at intervals as recommended by the API
     * service.
     *
     * Sample code:
     * ```
     * $options = [
     *     'apiEndpoint' => 'my-service-address',
     *     'scopes' => ['my-service-scope'],
     * ];
     * $operationsClient = new OperationsClient($options);
     * try {
     *     $name = '';
     *     $response = $operationsClient->getOperation($name);
     * } finally {
     *     if (isset($operationsClient)) {
     *         $operationsClient->close();
     *     }
     * }
     * ```
     *
     * @param string $name         The name of the operation resource.
     * @param array  $optionalArgs {
     *                             Optional.
     *
     *     @type RetrySettings|array $retrySettings
     *          Retry settings to use for this call. Can be a
     *          {@see Google\ApiCore\RetrySettings} object, or an associative array
     *          of retry settings parameters. See the documentation on
     *          {@see Google\ApiCore\RetrySettings} for example usage.
     * }
     *
     * @return \Google\LongRunning\Operation
     *
     * @throws ApiException if the remote call fails
     * @experimental
     */
    public function getOperation($name, $optionalArgs = [])
    {
        $request = new GetOperationRequest();
        $request->setName($name);

        return $this->startCall(
            'GetOperation',
            Operation::class,
            $optionalArgs,
            $request
        )->wait();
    }

    /**
     * Lists operations that match the specified filter in the request. If the
     * server doesn't support this method, it returns `UNIMPLEMENTED`.
     *
     * NOTE: the `name` binding below allows API services to override the binding
     * to use different resource name schemes, such as `users/&#42;/operations`.
     *
     * Sample code:
     * ```
     * $options = [
     *     'apiEndpoint' => 'my-service-address',
     *     'scopes' => ['my-service-scope'],
     * ];
     * $operationsClient = new OperationsClient($options);
     * try {
     *     $name = '';
     *     $filter = '';
     *     // Iterate through all elements
     *     $pagedResponse = $operationsClient->listOperations($name, $filter);
     *     foreach ($pagedResponse->iterateAllElements() as $element) {
     *         // doSomethingWith($element);
     *     }
     *
     *     // OR iterate over pages of elements
     *     $pagedResponse = $operationsClient->listOperations($name, $filter);
     *     foreach ($pagedResponse->iteratePages() as $page) {
     *         foreach ($page as $element) {
     *             // doSomethingWith($element);
     *         }
     *     }
     * } finally {
     *     if (isset($operationsClient)) {
     *         $operationsClient->close();
     *     }
     * }
     * ```
     *
     * @param string $name         The name of the operation collection.
     * @param string $filter       The standard list filter.
     * @param array  $optionalArgs {
     *                             Optional.
     *
     *     @type int $pageSize
     *          The maximum number of resources contained in the underlying API
     *          response. The API may return fewer values in a page, even if
     *          there are additional values to be retrieved.
     *     @type string $pageToken
     *          A page token is used to specify a page of values to be returned.
     *          If no page token is specified (the default), the first page
     *          of values will be returned. Any page token used here must have
     *          been generated by a previous call to the API.
     *     @type RetrySettings|array $retrySettings
     *          Retry settings to use for this call. Can be a
     *          {@see Google\ApiCore\RetrySettings} object, or an associative array
     *          of retry settings parameters. See the documentation on
     *          {@see Google\ApiCore\RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\PagedListResponse
     *
     * @throws ApiException if the remote call fails
     * @experimental
     */
    public function listOperations($name, $filter, $optionalArgs = [])
    {
        $request = new ListOperationsRequest();
        $request->setName($name);
        $request->setFilter($filter);
        if (isset($optionalArgs['pageSize'])) {
            $request->setPageSize($optionalArgs['pageSize']);
        }
        if (isset($optionalArgs['pageToken'])) {
            $request->setPageToken($optionalArgs['pageToken']);
        }

        return $this->getPagedListResponse(
            'ListOperations',
            $optionalArgs,
            ListOperationsResponse::class,
            $request
        );
    }

    /**
     * Starts asynchronous cancellation on a long-running operation.  The server
     * makes a best effort to cancel the operation, but success is not
     * guaranteed.  If the server doesn't support this method, it returns
     * `google.rpc.Code.UNIMPLEMENTED`.  Clients can use
     * [Operations.GetOperation][google.longrunning.Operations.GetOperation] or
     * other methods to check whether the cancellation succeeded or whether the
     * operation completed despite cancellation. On successful cancellation,
     * the operation is not deleted; instead, it becomes an operation with
     * an [Operation.error][google.longrunning.Operation.error] value with a [google.rpc.Status.code][google.rpc.Status.code] of 1,
     * corresponding to `Code.CANCELLED`.
     *
     * Sample code:
     * ```
     * $options = [
     *     'apiEndpoint' => 'my-service-address',
     *     'scopes' => ['my-service-scope'],
     * ];
     * $operationsClient = new OperationsClient($options);
     * try {
     *     $name = '';
     *     $operationsClient->cancelOperation($name);
     * } finally {
     *     if (isset($operationsClient)) {
     *         $operationsClient->close();
     *     }
     * }
     * ```
     *
     * @param string $name         The name of the operation resource to be cancelled.
     * @param array  $optionalArgs {
     *                             Optional.
     *
     *     @type RetrySettings|array $retrySettings
     *          Retry settings to use for this call. Can be a
     *          {@see Google\ApiCore\RetrySettings} object, or an associative array
     *          of retry settings parameters. See the documentation on
     *          {@see Google\ApiCore\RetrySettings} for example usage.
     * }
     *
     * @throws ApiException if the remote call fails
     * @experimental
     */
    public function cancelOperation($name, $optionalArgs = [])
    {
        $request = new CancelOperationRequest();
        $request->setName($name);

        return $this->startCall(
            'CancelOperation',
            GPBEmpty::class,
            $optionalArgs,
            $request
        )->wait();
    }

    /**
     * Deletes a long-running operation. This method indicates that the client is
     * no longer interested in the operation result. It does not cancel the
     * operation. If the server doesn't support this method, it returns
     * `google.rpc.Code.UNIMPLEMENTED`.
     *
     * Sample code:
     * ```
     * $options = [
     *     'apiEndpoint' => 'my-service-address',
     *     'scopes' => ['my-service-scope'],
     * ];
     * $operationsClient = new OperationsClient($options);
     * try {
     *     $name = '';
     *     $operationsClient->deleteOperation($name);
     * } finally {
     *     if (isset($operationsClient)) {
     *         $operationsClient->close();
     *     }
     * }
     * ```
     *
     * @param string $name         The name of the operation resource to be deleted.
     * @param array  $optionalArgs {
     *                             Optional.
     *
     *     @type RetrySettings|array $retrySettings
     *          Retry settings to use for this call. Can be a
     *          {@see Google\ApiCore\RetrySettings} object, or an associative array
     *          of retry settings parameters. See the documentation on
     *          {@see Google\ApiCore\RetrySettings} for example usage.
     * }
     *
     * @throws ApiException if the remote call fails
     * @experimental
     */
    public function deleteOperation($name, $optionalArgs = [])
    {
        $request = new DeleteOperationRequest();
        $request->setName($name);

        return $this->startCall(
            'DeleteOperation',
            GPBEmpty::class,
            $optionalArgs,
            $request
        )->wait();
    }
}
