From a65bf615e5ab029903fa5cedd80a2d89b3deaa02 Mon Sep 17 00:00:00 2001
From: Ken Murchison <murch@fastmail.com>
Date: Wed, 20 Mar 2024 00:24:31 -0400
Subject: [PATCH] http_jmap.c: add "urn:ietf:params:jmap:core:backendInfo"
 capability

---
 imap/http_jmap.c | 19 +++++++++++++++++++
 imap/jmap_api.h  |  1 +
 2 files changed, 20 insertions(+)

diff --git a/imap/http_jmap.c b/imap/http_jmap.c
index 97a2105145..75b488fc56 100644
--- a/imap/http_jmap.c
+++ b/imap/http_jmap.c
@@ -44,6 +44,7 @@
 #include <config.h>
 
 #include <errno.h>
+#include <sys/utsname.h>
 
 #include "acl.h"
 #include "append.h"
@@ -206,6 +207,24 @@ static void jmap_init(struct buf *serverinfo)
                           "url", "wss:" JMAP_BASE_URL JMAP_WS_COL,
                           "supportsPush", jmap_push_poll));
     }
+
+    if (config_serverinfo == IMAP_ENUM_SERVERINFO_ON) {
+        struct utsname buf;
+
+        uname(&buf);
+        json_object_set_new(my_jmap_settings.server_capabilities,
+                            JMAP_URN_CORE_INFO,
+                            json_pack("{s:{s:s s:s} s:{s:s s:s} s:{s:s s:s}}",
+                                      "apiBackend",
+                                      "name", "Cyrus JMAP",
+                                      "version", CYRUS_VERSION,
+                                      "product",
+                                      "name", "Cyrus JMAP",
+                                      "version", CYRUS_VERSION,
+                                      "environment",
+                                      "name", buf.sysname,
+                                      "version", buf.release));
+    }
 }
 
 static int jmap_auth(const char *userid __attribute__((unused)))
diff --git a/imap/jmap_api.h b/imap/jmap_api.h
index 4d52489a1d..01ef375e14 100644
--- a/imap/jmap_api.h
+++ b/imap/jmap_api.h
@@ -58,6 +58,7 @@
 #include "strarray.h"
 
 #define JMAP_URN_CORE       "urn:ietf:params:jmap:core"
+#define JMAP_URN_CORE_INFO  "urn:ietf:params:jmap:core:backendInfo"
 #define JMAP_URN_MAIL       "urn:ietf:params:jmap:mail"
 #define JMAP_URN_SUBMISSION "urn:ietf:params:jmap:submission"
 #define JMAP_URN_VACATION   "urn:ietf:params:jmap:vacationresponse"