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/* 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 https://mozilla.org/MPL/2.0/. */
#ifndef mozilla_ContentClassifierEngine_h
#define mozilla_ContentClassifierEngine_h
#include "content_classifier_ffi.h"
#include "nsError.h"
#include "nsString.h"
#include "nsTArray.h"
#include "nsIChannel.h"
namespace mozilla {
class ContentClassifierService;
class ContentClassifierResult {
bool mMatched = false;
bool mException = false;
bool mImportant = false;
nsresult mEngineResult = NS_ERROR_UNEXPECTED;
public:
ContentClassifierResult(bool aMatched, bool aException, bool aImportant,
nsresult aEngineResult)
: mMatched(aMatched),
mException(aException),
mImportant(aImportant),
mEngineResult(aEngineResult) {}
explicit ContentClassifierResult(nsresult aEngineResult)
: mMatched(false),
mException(false),
mImportant(false),
mEngineResult(aEngineResult) {}
nsresult EngineResult() { return mEngineResult; }
bool Hit() { return NS_SUCCEEDED(mEngineResult) && mMatched && !mException; }
bool Exception() { return NS_SUCCEEDED(mEngineResult) && mException; }
bool Important() { return NS_SUCCEEDED(mEngineResult) && mImportant; }
// Used to combine results from multiple engines. Respects important as a lock
// on the result.
void Accumulate(const ContentClassifierResult& aOther);
};
class ContentClassifierRequest {
friend class ContentClassifierEngine;
nsCString mUrl;
nsCString mSchemelessSite;
nsCString mSourceSchemelessSite;
nsCString mRequestType;
bool mThirdParty = false;
bool mValid = false;
public:
bool Valid() const { return mValid; }
const nsCString& Url() const { return mUrl; }
explicit ContentClassifierRequest(nsIChannel* aChannel);
};
class ContentClassifierEngine final {
public:
ContentClassifierEngine() : mEngine(nullptr) {
if (!sInitializedETLDService) {
nsresult rv = content_classifier_initialize_domain_resolver();
if (NS_SUCCEEDED(rv)) {
sInitializedETLDService = true;
}
}
}
~ContentClassifierEngine() {
if (mEngine) {
content_classifier_engine_destroy(mEngine);
mEngine = nullptr;
}
}
nsresult InitFromRules(const nsTArray<nsCString>& aRules) {
return content_classifier_engine_from_rules(&aRules, &mEngine);
}
ContentClassifierResult CheckNetworkRequest(
const ContentClassifierRequest& aRequest);
private:
static inline bool sInitializedETLDService = false;
ContentClassifierFFIEngine* mEngine;
ContentClassifierEngine(const ContentClassifierEngine&) = delete;
ContentClassifierEngine& operator=(const ContentClassifierEngine&) = delete;
};
} // namespace mozilla
#endif // mozilla_ContentClassifierEngine_h
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