correctly return URLs for apps

areas/apps/models.py

@@ -1,6 +1,7 @@
 """Everything to do with Apps"""
 
 import os
+import base64
 
 from sqlalchemy import ForeignKey, Integer, String, Boolean
 from sqlalchemy.orm import relationship
@@ -11,6 +12,11 @@ import helpers.kubernetes as k8s
 #from .apps import APP_NOT_INSTALLED_STATUS
 
 APP_NOT_INSTALLED_STATUS = "Not installed"
+DEFAULT_APP_SUBDOMAINS = {
+    "nextcloud": "files",
+    "wordpress": "www",
+    "monitoring": "grafana",
+}
 
 class App(db.Model):
     """
@@ -22,13 +28,26 @@ class App(db.Model):
     name = db.Column(String(length=64))
     slug = db.Column(String(length=64), unique=True)
     external = db.Column(Boolean, unique=False, nullable=False, default=True, server_default='0')
+    # The URL is only stored in the DB for external applications; otherwise the
+    # URL is stored in a configmap (see get_url)
     url = db.Column(String(length=128), unique=False)
 
     def __repr__(self):
         return f"{self.id} <{self.name}>"
 
     def get_url(self):
-        """Returns the URL where this application is running"""
+        """
+        Returns the URL where this application is running
+
+        For external applications: the URL is stored in the database
+
+        For internal applications: the URL is stored in a configmap named
+        `stackspin-{self.slug}-kustomization-variables under
+        `{self.slug_domain}`. This function reads that configmap. If the
+        configmap does not contain a URL for the application (which is
+        possible, if the app is not installed yet, for example), we return a
+        default URL.
+        """
 
         if self.external:
             return self.url
@@ -38,10 +57,20 @@ class App(db.Model):
                 f"stackspin-{self.slug}-kustomization-variables",
                 "flux-system")
         domain_key = f"{self.slug}_domain"
+        # No config map found, or configmap not configured to contain the
+        # domain (yet). Return the default for this app
         if ks_config_map is None or domain_key not in ks_config_map.keys():
-            return None
-
-        return ks_config_map[domain_key]
+            domain_secret = k8s.get_kubernetes_secret_data(
+                    "stackspin-cluster-variables",
+                    "flux-system")
+            domain = base64.b64decode(domain_secret['domain']).decode()
+            # See if there is another default subdomain for this app than just
+            # "slug.{domain}"
+            if self.slug in DEFAULT_APP_SUBDOMAINS:
+                return f"https://{DEFAULT_APP_SUBDOMAINS[self.slug]}.{domain}"
+            # No default known
+            return f"https://{self.slug}.{domain}"
+        return f"https://{ks_config_map[domain_key]}"
 
 
     def get_status(self):