add remaining org/proj/user initial sync

internal/metal/providers/emapi/helpers.go

@@ -0,0 +1,27 @@
+package emapi
+
+import (
+	"net/url"
+	"strings"
+)
+
+// idOrLinkID returns the id if not empty, otherwise it plucks the last subpath from the link.
+// An empty string is returned if nothing is defined or an error occurs.
+func idOrLinkID(id, link string) string {
+	if id != "" || link == "" {
+		return id
+	}
+
+	url, err := url.Parse(link)
+	if err != nil {
+		return ""
+	}
+
+	parts := strings.Split(strings.TrimRight(url.Path, "/"), "/")
+
+	if len(parts) != 0 {
+		return parts[len(parts)-1]
+	}
+
+	return ""
+}