Issue 4948 - add possibility to not send data depending on connection properties

include/AdblockPlus/FilterEngine.h

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 34 matching lines @@
      * Filter types, see https://adblockplus.org/en/filters.
      */
     enum Type {TYPE_BLOCKING, TYPE_EXCEPTION,
                TYPE_ELEMHIDE, TYPE_ELEMHIDE_EXCEPTION,
                TYPE_COMMENT, TYPE_INVALID};
 
     /**
      * Retrieves the type of this filter.
      * @return Type of this filter.
      */
-    Type GetType();
+    Type GetType() const;
 
     /**
      * Checks whether this filter has been added to the list of custom filters.
      * @return `true` if this filter has been added.
      */
-    bool IsListed();
+    bool IsListed() const;
 
     /**
      * Adds this filter to the list of custom filters.
      */
     void AddToList();
 
     /**
      * Removes this filter from the list of custom filters.
      */
     void RemoveFromList();
@@ skipping 16 matching lines @@
    * use `GetProperty()` to retrieve them by name.
    */
   class Subscription : public JsValue,
                        public std::enable_shared_from_this<Subscription>
   {
   public:
     /**
      * Checks if this subscription has been added to the list of subscriptions.
      * @return `true` if this subscription has been added.
      */
-    bool IsListed();
+    bool IsListed() const;
 
     /**
      * Adds this subscription to the list of subscriptions.
      */
     void AddToList();
 
     /**
      * Removes this subscription from the list of subscriptions.
      */
     void RemoveFromList();
 
     /**
      * Updates this subscription, i.e.\ retrieves the current filters from the
      * subscription URL.
      */
     void UpdateFilters();
 
     /**
      * Checks if the subscription is currently being updated.
      * @return `true` if the subscription is currently being updated.
      */
-    bool IsUpdating();
+    bool IsUpdating() const;
 
     bool operator==(const Subscription& subscription) const;
 
     /**
      * Creates a wrapper for an existing JavaScript subscription object.
      * Normally you shouldn't call this directly, but use
      * FilterEngine::GetSubscription() instead.
      * @param value JavaScript subscription object.
      */
     Subscription(JsValue&& value);
@@ skipping 141 matching lines @@
      * @return `true` if the application is running for the first time.
      */
     bool IsFirstRun() const;
 
     /**
      * Retrieves a filter object from its text representation.
      * @param text Text representation of the filter,
      *        see https://adblockplus.org/en/filters.
      * @return New `Filter` instance.
      */
-    FilterPtr GetFilter(const std::string& text);
+    FilterPtr GetFilter(const std::string& text) const;
 
     /**
      * Retrieves a subscription object for the supplied URL.
      * @param url Subscription URL.
      * @return New `Subscription` instance.
      */
-    SubscriptionPtr GetSubscription(const std::string& url);
+    SubscriptionPtr GetSubscription(const std::string& url) const;
 
     /**
      * Retrieves the list of custom filters.
      * @return List of custom filters.
      */
     std::vector<FilterPtr> GetListedFilters() const;
 
     /**
      * Retrieves all subscriptions.
      * @return List of subscriptions.
@@ skipping 104 matching lines @@
      * @param pref Preference name.
      * @param value New value of the preference.
      */
     void SetPref(const std::string& pref, JsValuePtr value);
 
     /**
      * Extracts the host from a URL.
      * @param url URL to extract the host from.
      * @return Extracted host.
      */
-    std::string GetHostFromURL(const std::string& url);
+    std::string GetHostFromURL(const std::string& url) const;
 
     /**
      * Sets the callback invoked when an application update becomes available.
      * @param callback Callback to invoke.
      */
     void SetUpdateAvailableCallback(UpdateAvailableCallback callback);
 
     /**
      * Removes the callback invoked when an application update becomes
      * available.
@@ skipping 30 matching lines @@
      * passed to CreateParameters::isConnectionAllowed callback.
      * @param value Stored value. nullptr means removing of any previously
      *        stored value.
      */
     void SetAllowedConnectionType(const std::string* value);
 
     /**
       * Retrieves previously stored allowed connection type.
       * @return Preference value, or `nullptr` if it doesn't exist.
       */
-    std::unique_ptr<std::string> GetAllowedConnectionType();
+    std::unique_ptr<std::string> GetAllowedConnectionType() const;
 
     /**
      * Compares two version strings in
      * [Mozilla toolkit version format](https://developer.mozilla.org/en/docs/Toolkit_version_format).
      * @param v1 First version string.
      * @param v2 Second version string.
      * @return
      *         - `0` if `v1` and `v2` are identical.
      *         - A negative number if `v1` is less than `v2`.
      *         - A positive number if `v1` is greater than `v2`.
      */
-    int CompareVersions(const std::string& v1, const std::string& v2);
+    int CompareVersions(const std::string& v1, const std::string& v2) const;
 
     /**
      * Retrieves the `ContentType` for the supplied string.
      * @param contentType Content type string.
      * @return The `ContentType` for the string.
      * @throw `std::invalid_argument`, if an invalid `contentType` was supplied.
      */
     static ContentType StringToContentType(const std::string& contentType);
 
     /**
@@ skipping 23 matching lines @@
       const JsValueList& params);
     FilterPtr GetWhitelistingFilter(const std::string& url,
       ContentTypeMask contentTypeMask, const std::string& documentUrl) const;
     FilterPtr GetWhitelistingFilter(const std::string& url,
       ContentTypeMask contentTypeMask,
       const std::vector<std::string>& documentUrls) const;
   };
 }
 
 #endif