From 1a9e07e4ed930f33a28d0eac800bccaa2a84570e Mon Sep 17 00:00:00 2001
From: Bruno de Oliveira Abinader <bruno@mapbox.com>
Date: Thu, 13 Jun 2019 18:56:35 +0300
Subject: [core] DefaultFileSource dynamic support for cache-only requests

---
 include/mbgl/storage/default_file_source.hpp | 17 +++++------------
 include/mbgl/storage/resource_options.hpp    | 15 +++++++++++++++
 2 files changed, 20 insertions(+), 12 deletions(-)

(limited to 'include')

diff --git a/include/mbgl/storage/default_file_source.hpp b/include/mbgl/storage/default_file_source.hpp
index f46f41771e..4f4c7136c6 100644
--- a/include/mbgl/storage/default_file_source.hpp
+++ b/include/mbgl/storage/default_file_source.hpp
@@ -23,20 +23,11 @@ using PathChangeCallback = std::function<void ()>;
 
 class DefaultFileSource : public FileSource {
 public:
-    /*
-     * The maximumCacheSize parameter is a limit applied to non-offline resources only,
-     * i.e. resources added to the database for the "ambient use" caching functionality.
-     * There is no size limit for offline resources. If a user never creates any offline
-     * regions, we want the database to remain fairly small (order tens or low hundreds
-     * of megabytes).
-     */
-    DefaultFileSource(const std::string& cachePath, const std::string& assetPath);
-    DefaultFileSource(const std::string& cachePath, std::unique_ptr<FileSource>&& assetFileSource);
+    DefaultFileSource(const std::string& cachePath, const std::string& assetPath, bool supportCacheOnlyRequests = true);
+    DefaultFileSource(const std::string& cachePath, std::unique_ptr<FileSource>&& assetFileSource, bool supportCacheOnlyRequests = true);
     ~DefaultFileSource() override;
 
-    bool supportsCacheOnlyRequests() const override {
-        return true;
-    }
+    bool supportsCacheOnlyRequests() const override;
 
     void setAPIBaseURL(const std::string&);
     std::string getAPIBaseURL();
@@ -253,6 +244,8 @@ private:
 
     std::mutex cachedAccessTokenMutex;
     std::string cachedAccessToken;
+
+    const bool supportCacheOnlyRequests;
 };
 
 } // namespace mbgl
diff --git a/include/mbgl/storage/resource_options.hpp b/include/mbgl/storage/resource_options.hpp
index 6d603b8cca..53350f55c2 100644
--- a/include/mbgl/storage/resource_options.hpp
+++ b/include/mbgl/storage/resource_options.hpp
@@ -96,6 +96,21 @@ public:
      */
     uint64_t maximumCacheSize() const;
 
+    /**
+     * @brief Sets whether to support cache-only requests.
+     *
+     * @return Whether or not cache-only requests are supported.
+     */
+    bool supportsCacheOnlyRequests() const;
+
+    /**
+     * @brief Gets the previously set (or default) support for cache-only requests.
+     *
+     * @param Whether or not cache-only requests are supported.
+     * @return reference to ResourceOptions for chaining options together.
+     */
+    ResourceOptions& withCacheOnlyRequestsSupport(bool);
+
     /**
      * @brief Sets the platform context. A platform context is usually an object
      * that assists the creation of a file source.
-- 
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