Added command to show eHerkenning services.

digid_eherkenning/management/commands/show_services.py

@@ -0,0 +1,83 @@
+from django.core.management import BaseCommand
+
+import requests
+from lxml import etree
+
+SERVICE_CATALOG_URLS = {
+    "prod": "https://aggregator.etoegang.nl/1.13/servicecatalog.xml",
+    "preprod": "https://aggregator.etoegang.nl/test/1.13/servicecatalog.xml",
+}
+NAMESPACES = {"esc": "urn:etoegang:1.13:service-catalog"}
+
+
+class Command(BaseCommand):
+    help = "Updates the stored metadata file and prepopulates the db fields."
+
+    def add_arguments(self, parser):
+        parser.add_argument(
+            "env",
+            type=str,
+            choices=["prod", "preprod"],
+            default="preprod",
+            help="Indicate the service catalogs to search.",
+        )
+        parser.add_argument(
+            "oin",
+            type=str,
+            help="The organisation OIN (government identification number).",
+        )
+
+    def handle(self, **options):
+        env = options.get("env")
+        oin = options.get("oin")
+
+        service_catalog_url = SERVICE_CATALOG_URLS.get(env)
+
+        response = requests.get(service_catalog_url)
+        if response.status_code != 200:
+            self.stderr.write("Could not retrieve service catalog.")
+            return
+
+        # etree.parse didn't like a URL directly.
+        tree = etree.fromstring(response.content)
+
+        service_provider = tree.xpath(
+            f"esc:ServiceProvider[esc:ServiceProviderID/text()='{oin}']",
+            namespaces=NAMESPACES,
+        )
+
+        if len(service_provider) > 1:
+            self.stderr.write("Found multiple service providers for this OIN.")
+            return
+        elif len(service_provider) < 1:
+            self.stderr.write("Found no service providers for this OIN.")
+            return
+
+        service_provider = service_provider[0]
+        service_definitions = service_provider.xpath(
+            "esc:ServiceDefinition", namespaces=NAMESPACES
+        )
+
+        org_name = service_provider.xpath(
+            "esc:OrganizationDisplayName[@xml:lang='nl']/text()", namespaces=NAMESPACES
+        )[0]
+
+        self.stdout.write(f"Service provider organization: {org_name}")
+        for sd in service_definitions:
+            sd_uuid = sd.xpath("esc:ServiceUUID/text()", namespaces=NAMESPACES)[0]
+            sd_name = sd.xpath(
+                "esc:ServiceName[@xml:lang='nl']/text()", namespaces=NAMESPACES
+            )[0]
+            sd_description = sd.xpath(
+                "esc:ServiceDescription[@xml:lang='nl']/text()", namespaces=NAMESPACES
+            )[0]
+
+            self.stdout.write(f"+-- Service definition: {sd_name} ({sd_description})")
+
+            service_instance_ids = service_provider.xpath(
+                f"esc:ServiceInstance[esc:InstanceOfService[text()='{sd_uuid}']]/esc:ServiceID/text()",
+                namespaces=NAMESPACES,
+            )
+
+            for si in service_instance_ids:
+                self.stdout.write(f"    +-- Service ID: {si}")