/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set ts=8 sts=4 et sw=4 tw=99: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/ScriptPreloader.h"
#include "ScriptPreloader-inl.h"
#include "mozilla/loader/ScriptCacheActors.h"

#include "mozilla/dom/ContentParent.h"

namespace mozilla {
namespace loader {

void
ScriptCacheChild::Init(const Maybe<FileDescriptor>& cacheFile, bool wantCacheData)
{
    mWantCacheData = wantCacheData;

    auto& cache = ScriptPreloader::GetChildSingleton();
    Unused << cache.InitCache(cacheFile, this);

    if (!wantCacheData) {
        // If the parent process isn't expecting any cache data from us, we're
        // done.
        Send__delete__(this, AutoTArray<ScriptData, 0>());
    }
}

// Finalize the script cache for the content process, and send back data about
// any scripts executed up to this point.
void
ScriptCacheChild::SendScriptsAndFinalize(ScriptPreloader::ScriptHash& scripts)
{
    MOZ_ASSERT(mWantCacheData);

    AutoSafeJSAPI jsapi;

    auto matcher = ScriptPreloader::Match<ScriptPreloader::ScriptStatus::Saved>();

    nsTArray<ScriptData> dataArray;
    for (auto& script : IterHash(scripts, matcher)) {
        if (!script->mSize && !script->XDREncode(jsapi.cx())) {
            continue;
        }

        auto data = dataArray.AppendElement();

        data->url() = script->mURL;
        data->cachePath() = script->mCachePath;
        data->loadTime() = script->mLoadTime;

        if (script->HasBuffer()) {
            auto& xdrData = script->Buffer();
            data->xdrData().AppendElements(xdrData.begin(), xdrData.length());
            script->FreeData();
        }
    }

    Send__delete__(this, dataArray);
}

void
ScriptCacheChild::ActorDestroy(ActorDestroyReason aWhy)
{
    auto& cache = ScriptPreloader::GetChildSingleton();
    cache.mChildActor = nullptr;
}


IPCResult
ScriptCacheParent::Recv__delete__(nsTArray<ScriptData>&& scripts)
{
    if (!mWantCacheData && scripts.Length()) {
        return IPC_FAIL(this, "UnexpectedScriptData");
    }

    // We don't want any more data from the process at this point.
    mWantCacheData = false;

    // Merge the child's script data with the parent's.
    auto parent = static_cast<dom::ContentParent*>(Manager());
    auto processType = ScriptPreloader::GetChildProcessType(parent->GetRemoteType());

    auto& cache = ScriptPreloader::GetChildSingleton();
    for (auto& script : scripts) {
        cache.NoteScript(script.url(), script.cachePath(), processType,
                         Move(script.xdrData()), script.loadTime());
    }

    return IPC_OK();
}

void
ScriptCacheParent::ActorDestroy(ActorDestroyReason aWhy)
{}

} // namespace loader
} // namespace mozilla