ibnstanceinfo.sh: Improved nodeinfo support.

instanceinfo.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 # Print some basic info about fediverse instances.
 
-# Version: 2019-06-24_6
+# Version: 2019-06-24_7
 
 if [[ -z "${1}" ]]; then
     echo "usage: ${0} DOMAIN" >&2
@@ -51,26 +51,30 @@ function main()
     elif curl -sIf "${nodeinfo}" | grep -iq 'Content-Type: application/json'; then
         echo "Nodeinfo found."
         json=$(curl -s "${nodeinfo}")
-        local implementation=""
+        # shellcheck disable=SC2155
+        local implementation=$(jq -r ".software.name" <<<"${json}")
 
-        if [[ $(jq -r ".software.name" <<<"${json}") == "pleroma" ]]; then
-            implementation="Pleroma"
-        fi
         [[ -n "${implementation}" ]] && echo "${implementation} detected."
 
-        echo -n "Description: "
-        jq -r ".metadata.nodeDescription" <<<"${json}"
+        # shellcheck disable=SC2155
+        local description=$(jq -r ".metadata.nodeDescription" <<<"${json}")
+        if [[ "${description}" == "null" ]]; then
+            description=$(jq -r ".metadata.nodeName" <<<"${json}")
+        fi
+        [[ "${description}" != "null" ]] && echo "Description: ${description}"
 
-        echo "Admins: "
-        jq -r ".metadata.staffAccounts" <<<"${json}"
+        # shellcheck disable=SC2155
+        local admins=$(jq -r ".metadata.staffAccounts" <<<"${json}")
+        [[ "${admins}" != "null" ]] && echo "Admins: ${admins}"
 
         echo -n "Number of users: "
         jq -r ".usage.users.total" <<<"${json}"
 
-        echo "Federation restrictions: "
-        jq -r ".metadata.federation.mrf_simple" <<<"${json}"
+        # shellcheck disable=SC2155
+        local restrictions=$(jq -r ".metadata.federation.mrf_simple" <<<"${json}")
+        [[ "${restrictions}" != "null" ]] && echo "Federation restrictions: ${restrictions}"
 
-        if [[ "${implementation}" == "Pleroma" ]]; then
+        if [[ "${implementation}" == "pleroma" ]]; then
             echo "Further info, maybe: https://${instance}/about"
         fi
     elif curl -sIf "${mastoinfo}" | grep -iq 'Content-Type: application/json'; then