Issue 5146 - Implement DownloadableSubscription parsing in C++

compiled/subscription/DownloadableSubscription.h

Index: compiled/subscription/DownloadableSubscription.h
===================================================================
--- a/compiled/subscription/DownloadableSubscription.h
+++ b/compiled/subscription/DownloadableSubscription.h
@@ -13,19 +13,26 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #pragma once
 
 #include <cstdint>
+#include <vector>
 
+#include "../bindings/runtime.h"
+#include "../filter/Filter.h"
+#include "../Md5.h"
+#include "../StringMap.h"
 #include "Subscription.h"
-#include "../bindings/runtime.h"
+
+class String;
+class DownloadableSubscription_Parser;
 
 class DownloadableSubscription : public Subscription
 {
 public:
   static constexpr Type classType = Type::DOWNLOADABLE;
   explicit DownloadableSubscription(const String& id);
 
   SUBSCRIPTION_PROPERTY(bool, mFixedTitle, SUBSCRIPTION_FIXEDTITLE,
@@ -48,12 +55,33 @@
       GetErrorCount, SetErrorCount);
   SUBSCRIPTION_PROPERTY(uint64_t, mDataRevision, NONE,
       GetDataRevision, SetDataRevision);
   SUBSCRIPTION_STRING_PROPERTY(mRequiredVersion, NONE,
       GetRequiredVersion, SetRequiredVersion);
   SUBSCRIPTION_PROPERTY(int, mDownloadCount, NONE,
       GetDownloadCount, SetDownloadCount);
 
+  static DownloadableSubscription_Parser* BINDINGS_EXPORTED ParseDownload();
   OwnedString BINDINGS_EXPORTED Serialize() const;
 };
 
 typedef intrusive_ptr<DownloadableSubscription> DownloadableSubscriptionPtr;
+
+class DownloadableSubscription_Parser : public ref_counted
+{
+  std::vector<OwnedString> mFiltersText;
+  OwnedStringMap<OwnedString> mParams;
+  bool mFirstLine;
+public:
+  DownloadableSubscription_Parser();
+  void BINDINGS_EXPORTED Process(const String& line);
+  bool BINDINGS_EXPORTED VerifyChecksum();
+  // return the expiration interval.
+  int64_t BINDINGS_EXPORTED Finalize(DownloadableSubscription&);
+  const String& BINDINGS_EXPORTED GetRedirect() const;
+  const String& BINDINGS_EXPORTED GetHomepage() const;
+private:
+  MD5 mChecksum;
+  OwnedString mB64Checksum;
+  static int64_t ParseExpires(const String& expires);
+};
+