get social app name programmatically

src/entry.sh

···
     _version="$_force_version" &&\
     atfile.util.print_override_envvar_debug "Version" "_version"
 
-if [[ $_endpoint_appview != "$_endpoint_appview_default" ]] &&\
-   [[ $_endpoint_social_app == "$_endpoint_social_app_default" ]]; then
-    case "$_endpoint_appview" in
-        "https://bsky.zeppelin.social") _endpoint_social_app="https://zeppelin.social" ;;
-    esac
+if [[ $_endpoint_social_app != "$_endpoint_social_app_default" ]]; then
+    _endpoint_social_app_name="$(atfile.util.get_root_domain "$_endpoint_social_app")"
+    _endpoint_social_app_name="${_endpoint_social_app_name^}"
 fi
-
-case "$_endpoint_social_app" in
-    "https://blacksky.community") _endpoint_social_app_name="Blacksky" ;;
-    "https://deer.social") _endpoint_social_app_name="Deer" ;;
-    "https://zeppelin.social") _endpoint_social_app_name="Zeppelin" ;;
-esac
 
 ### Validation
 

src/shared/util.sh

···
     echo -e "$input" | sed -n "$(( index ))"p
 }
 
+function atfile.util.get_root_domain() {
+    local url="$1"
+    local domain=${url#*://}
+    domain=${domain%%/*}
+
+    local main_part=$(echo "$domain" | tr '.' '\n' | tac | sed -n '2p')
+
+    echo "$main_part"
+}
+
 function atfile.util.get_mediainfo_field() {
     file="$1"
     category="$2"