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/*
 * (c) Copyright 2017 Palantir Technologies Inc. All rights reserved.
 *
 * Licensed 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.
 */

package com.palantir.conjure.java.okhttp;

import com.palantir.conjure.java.api.config.service.UserAgent;
import com.palantir.conjure.java.api.config.service.UserAgents;
import java.io.IOException;
import okhttp3.Interceptor;
import okhttp3.Request;
import okhttp3.Response;

public final class UserAgentInterceptor implements Interceptor {

    private final String userAgent;

    private UserAgentInterceptor(UserAgent userAgent) {
        this.userAgent = UserAgents.format(userAgent);
    }

    public static UserAgentInterceptor of(UserAgent userAgent) {
        return new UserAgentInterceptor(userAgent);
    }

    @Override
    public Response intercept(Chain chain) throws IOException {
        Request originalRequest = chain.request();
        Request requestWithUserAgent =
                originalRequest.newBuilder().header("User-Agent", userAgent).build();
        return chain.proceed(requestWithUserAgent);
    }
}