Copyright (c) 2013, The Android Open Source Project
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.
/**
 * Copyright (c) 2013, The Android Open Source Project
 *
 * 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.android.pacprocessor;

import android.util.Log;

@hide
/**
 * @hide
 */
public class PacNative {
    private static final String TAG = "PacProxy";

    private String mCurrentPac;

    private boolean mIsActive;

    // Only make native calls from inside synchronized blocks.
    private native boolean createV8ParserNativeLocked();
    private native boolean destroyV8ParserNativeLocked();

    private native boolean setProxyScriptNativeLocked(String script);

    private native String makeProxyRequestNativeLocked(String url, String host);

    static {
        System.loadLibrary("jni_pacprocessor");
    }

    PacNative() {

    }

    public synchronized boolean startPacSupport() {
        if (createV8ParserNativeLocked()) {
            Log.e(TAG, "Unable to Create v8 Proxy Parser.");
            return true;
        }
        mIsActive = true;
        return false;
    }

    public synchronized boolean stopPacSupport() {
        if (mIsActive) {
            if (destroyV8ParserNativeLocked()) {
                Log.e(TAG, "Unable to Destroy v8 Proxy Parser.");
                return true;
            }
            mIsActive = false;
        }
        return false;
    }

    public synchronized boolean setCurrentProxyScript(String script) {
        if (setProxyScriptNativeLocked(script)) {
            Log.e(TAG, "Unable to parse proxy script.");
            return true;
        }
        return false;
    }

    public synchronized String makeProxyRequest(String url, String host) {
        String ret = makeProxyRequestNativeLocked(url, host);
        if ((ret == null) || (ret.length() == 0)) {
            Log.e(TAG, "v8 Proxy request failed.");
            ret = null;
        }
        return ret;
    }

    public synchronized boolean isActive() {
        return mIsActive;
    }
}