Initial redfish logging support

This was imported from a fork:
https://github.com/ampere-openbmc/bmcweb/commits/ampere-next/redfish-core/lib/logservices.hpp

Which had a series of commits from TungVuX and hyche

The initial patch is that code verbatim.
Follow up patches on top of this make the necessary changes
for current bmcweb:
- Move to sdbusplus
- C++ naming convention changes
- Clang format
- Some refactoring

Tested:
  Verified new services work correctly when queried
    e.g. curl -k -H "X-Auth-Token: $bmc_token" -X GET \
    https://${bmc}/redfish/v1/Systems/system/LogServices/EventLog/Entries
    displays the entries properly.

    RedfishServiceValidator results:
      /redfish/v1/Systems/system/LogServices
        pass: 3
        passGet: 1
        skipOptional: 1
      /redfish/v1/Systems/system/LogServices/EventLog
        pass: 5
        passGet: 1
        skipOptional: 8
      /redfish/v1/Systems/system/LogServices/EventLog/Entries
        pass: 3
        passGet: 1
        skipOptional: 1
      /redfish/v1/Systems/system/LogServices/EventLog/<str>
        pass: 6
        passGet: 1
        skipOptional: 16

Sample Output: curl -k -H "X-Auth-Token: $bmc_token" -X GET https://${bmc}/redfish/v1/Systems/system/LogServices/EventLog/Entries
{
  "@odata.context": "/redfish/v1/$metadata#LogEntryCollection.LogEntryCollection",
  "@odata.id": "/redfish/v1/Systems/system/LogServices/EventLog/Entries",
  "@odata.type": "#LogEntryCollection.LogEntryCollection",
  "Description": "Collection of System Event Log Entries",
  "Members": [
    {
      "@odata.context": "/redfish/v1/$metadata#LogEntry.LogEntry",
      "@odata.id": "/redfish/v1/Systems/system/LogServices/EventLog/Entries/1",
      "@odata.type": "#LogEntry.v1_4_0.LogEntry",
      "Created": "2019-02-22T17:11:00+00:00",
      "EntryType": "Event",
      "Id": "1",
      "Message": "example.xyz.openbmc_project.Example.Elog.AutoTestSimple",
      "Name": "System DBus Event Log Entry",
      "Severity": "Critical"
    }
  ],
  "Members@odata.count": 1,
  "Name": "System Event Log Entries"
}

Change-Id: I422b0d0ec577ea734fecfb6f49101ec5ff45a556
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Signed-off-by: Anthony Wilson <wilsonan@us.ibm.com>

1 files changed, 29 insertions, 1 deletions

diff --git a/crow/include/crow/utility.h b/crow/include/crow/utility.h
index a07c0415af..63d2dece5f 100644
--- a/crow/include/crow/utility.h
+++ b/crow/include/crow/utility.h
@@ -2,7 +2,6 @@
 
 #include "nlohmann/json.hpp"
 
-#include <boost/utility/string_view.hpp>
 #include <cstdint>
 #include <cstring>
 #include <functional>
@@ -712,5 +711,34 @@ inline void convertToLinks(std::string& s)
     s = std::regex_replace(s, nextLink, "$1<a href=\"$5\">$4</a>");
 }
 
+/**
+ * Method returns Date Time information according to requested format
+ *
+ * @param[in] time time in second since the Epoch
+ *
+ * @return Date Time according to requested format
+ */
+inline std::string getDateTime(const std::time_t& time)
+{
+    std::array<char, 128> dateTime;
+    std::string redfishDateTime("0000-00-00T00:00:00Z00:00");
+
+    if (std::strftime(dateTime.begin(), dateTime.size(), "%FT%T%z",
+                      std::localtime(&time)))
+    {
+        // insert the colon required by the ISO 8601 standard
+        redfishDateTime = std::string(dateTime.data());
+        redfishDateTime.insert(redfishDateTime.end() - 2, ':');
+    }
+
+    return redfishDateTime;
+}
+
+inline std::string dateTimeNow()
+{
+    std::time_t time = std::time(nullptr);
+    return getDateTime(time);
+}
+
 } // namespace utility
 } // namespace crow