Sources/ApacheBeam/Client/ExpansionClient.swift

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 *  License); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an  AS IS BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import Foundation
import GRPC

public struct ExpansionClient {
    let client: Org_Apache_Beam_Model_Expansion_V1_ExpansionServiceAsyncClient

    public init(endpoint: ApiServiceDescriptor) throws {
        client = try Org_Apache_Beam_Model_Expansion_V1_ExpansionServiceAsyncClient(channel: GRPCChannelPool.with(endpoint: endpoint, eventLoopGroup: PlatformSupport.makeEventLoopGroup(loopCount: 1)))
    }

    public func transforms() async throws -> [String: ([String], [String], Schema)] {
        let call = try await client.makeDiscoverSchemaTransformCall(.with { _ in }).response
        var transforms: [String: ([String], [String], Schema)] = [:]
        for (k, v) in call.schemaTransformConfigs {
            transforms[k] = (v.inputPcollectionNames, v.outputPcollectionNames, .from(v.configSchema))
        }
        return transforms
    }
}