Refactoring AWS level 2 data provider, pushing up common functions

wxdata/include/scwx/provider/level2_data_provider.hpp

@@ -1,108 +0,0 @@
-#pragma once
-
-#include <scwx/wsr88d/ar2v_file.hpp>
-
-#include <chrono>
-#include <memory>
-#include <string>
-
-namespace scwx
-{
-namespace provider
-{
-
-class Level2DataProviderImpl;
-
-class Level2DataProvider
-{
-public:
-   explicit Level2DataProvider();
-   ~Level2DataProvider();
-
-   Level2DataProvider(const Level2DataProvider&) = delete;
-   Level2DataProvider& operator=(const Level2DataProvider&) = delete;
-
-   Level2DataProvider(Level2DataProvider&&) noexcept;
-   Level2DataProvider& operator=(Level2DataProvider&&) noexcept;
-
-   virtual size_t cache_size() const = 0;
-
-   /**
-    * Gets the last modified time. This is equal to the most recent object's
-    * modification time. If there are no objects, the epoch is returned.
-    *
-    * @return Last modified time
-    */
-   virtual std::chrono::system_clock::time_point last_modified() const = 0;
-
-   /**
-    * Gets the current update period. This is equal to the difference between
-    * the last two objects' modification times. If there are less than two
-    * objects, an update period of 0 is returned.
-    *
-    * @return Update period
-    */
-   virtual std::chrono::seconds update_period() const = 0;
-
-   /**
-    * Finds the most recent key in the cache, no later than the time provided.
-    *
-    * @param time Upper-bound time for the key search
-    *
-    * @return Level 2 data key
-    */
-   virtual std::string FindKey(std::chrono::system_clock::time_point time) = 0;
-
-   /**
-    * Finds the most recent key in the cache.
-    *
-    * @return Level 2 data key
-    */
-   virtual std::string FindLatestKey() = 0;
-
-   /**
-    * Lists level 2 objects for the date supplied, and adds them to the cache.
-    *
-    * @param date Date for which to list objects
-    *
-    * @return - New objects found for the given date
-    *         - Total objects found for the given date
-    */
-   virtual std::pair<size_t, size_t>
-   ListObjects(std::chrono::system_clock::time_point date) = 0;
-
-   /**
-    * Loads a level 2 object by the given key.
-    *
-    * @param key Level 2 data key
-    *
-    * @return Level 2 data
-    */
-   virtual std::shared_ptr<wsr88d::Ar2vFile>
-   LoadObjectByKey(const std::string& key) = 0;
-
-   /**
-    * Lists level 2 objects for the current date, and adds them to the cache. If
-    * no objects have been added to the cache for the current date, the previous
-    * date is also queried for data.
-    *
-    * @return New objects found
-    */
-   virtual size_t Refresh() = 0;
-
-   /**
-    * Convert the object key to a time point.
-    *
-    * @key Level 2 data key
-    *
-    * @return Level 2 data time point
-    */
-   virtual std::chrono::system_clock::time_point
-   GetTimePointByKey(const std::string& key) const = 0;
-
-private:
-   std::unique_ptr<Level2DataProviderImpl> p;
-};
-
-} // namespace provider
-} // namespace scwx