blob_handler: provide a convenience static factory

Provide a static factory for convenience to get a unique_ptr to the base
object.

Change-Id: I058e7a28a6bc30182ed9ada5ea479a317d071893
Signed-off-by: Patrick Venture <venture@google.com>

2 files changed, 17 insertions, 0 deletions

diff --git a/src/ipmiblob/blob_handler.cpp b/src/ipmiblob/blob_handler.cpp
index 7a688bf..77fcb6c 100644
--- a/src/ipmiblob/blob_handler.cpp
+++ b/src/ipmiblob/blob_handler.cpp
@@ -19,9 +19,11 @@
 #include "blob_errors.hpp"
 #include "crc.hpp"
 #include "ipmi_errors.hpp"
+#include "ipmi_interface.hpp"
 
 #include <array>
 #include <cstring>
+#include <memory>
 
 namespace ipmiblob
 {
@@ -31,6 +33,12 @@ namespace
 const std::array<std::uint8_t, 3> ipmiPhosphorOen = {0xcf, 0xc2, 0x00};
 }
 
+std::unique_ptr<BlobInterface>
+    BlobHandler::CreateBlobHandler(std::unique_ptr<IpmiInterface> ipmi)
+{
+    return std::make_unique<BlobHandler>(std::move(ipmi));
+}
+
 std::vector<std::uint8_t>
     BlobHandler::sendIpmiPayload(BlobOEMCommands command,
                                  const std::vector<std::uint8_t>& payload)
diff --git a/src/ipmiblob/blob_handler.hpp b/src/ipmiblob/blob_handler.hpp
index 6c4ba7a..0b6db17 100644
--- a/src/ipmiblob/blob_handler.hpp
+++ b/src/ipmiblob/blob_handler.hpp
@@ -26,6 +26,15 @@ class BlobHandler : public BlobInterface
         bmcBlobWriteMeta = 10,
     };
 
+    /**
+     * Create a BlobInterface pointer for use given an ipmi handler.
+     *
+     * @note This is a convenience method.
+     * @return a BlobHandler wrapped as a BlobInterface pointer.
+     */
+    static std::unique_ptr<BlobInterface>
+        CreateBlobHandler(std::unique_ptr<IpmiInterface> ipmi);
+
     explicit BlobHandler(std::unique_ptr<IpmiInterface> ipmi) :
         ipmi(std::move(ipmi)){};