Allow lookup of org details

This commit:
- makes the logic around looking up a domain a bit more sophisticated
  by matching on the longest domain name first
- exposes the details about an organisation to consumers of the
  `GovernmentDomain` class

app/utils.py

@@ -439,131 +439,117 @@ class NotGovernmentDomain(Exception):
 class GovernmentDomain:
 
     domains = {
-        "gov.uk": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "mod.uk": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "mil.uk": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "ddc-mod.org": {
-            "sector": None,
-            "agreement_signed": False,
-        },
+        "gov.uk": None,
+        "mod.uk": None,
+        "mil.uk": None,
+        "ddc-mod.org": None,
         "slc.co.uk": {
+            "owner": "Student Loans Company",
             "sector": None,
             "agreement_signed": False,
         },
-        "gov.scot": {
-            "sector": None,
-            "agreement_signed": False,
-        },
+        "gov.scot": None,
         "parliament.uk": {
+            "owner": "Parliament",
             "sector": None,
             "agreement_signed": False,
         },
         "nhs.uk": {
+            "owner": "NHS",
             "sector": None,
             "agreement_signed": False,
         },
-        "nhs.net": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "police.uk": {
-            "sector": None,
-            "agreement_signed": False,
-        },
+        "nhs.net": "nhs.uk",
+        "police.uk": None,
         "dclgdatamart.co.uk": {
+            "owner": None,
             "sector": None,
             "agreement_signed": False,
         },
-        "ucds.email": {
+        "dwp.gov.uk": {
+            "owner": "Deparment for Work and Pensions",
             "sector": None,
             "agreement_signed": False,
         },
+        "dwp.gsi.gov.uk": "dwp.gov.uk",
+        "ucds.email": "dwp.gov.uk",
         "naturalengland.org.uk": {
+            "Owner": "Natural England",
             "sector": None,
             "agreement_signed": False,
         },
         "hmcts.net": {
+            "owner": "Her Majesty’s Courts and Tribunals Service",
             "sector": None,
             "agreement_signed": False,
         },
-        "scotent.co.uk": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "assembly.wales": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "cjsm.net": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "cqc.org.uk": {
-            "sector": None,
-            "agreement_signed": False,
-        },
+        "scotent.co.uk": None,
+        "assembly.wales": None,
+        "cjsm.net": None,
+        "cqc.org.uk": None,
         "bl.uk": {
+            "owner": "British Library",
             "sector": None,
             "agreement_signed": False,
         },
-        "stfc.ac.uk": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "wmfs.net": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "bbsrc.ac.uk": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "acas.org.uk": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "gov.wales": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "biglotteryfund.org.uk": {
-            "sector": None,
-            "agreement_signed": False,
-        },
+        "stfc.ac.uk": None,
+        "wmfs.net": None,
+        "bbsrc.ac.uk": None,
+        "acas.org.uk": None,
+        "gov.wales": None,
+        "biglotteryfund.org.uk": None,
         "marinemanagement.org.uk": {
-            "sector": None,
-            "agreement_signed": False,
+            "owner": "Marine Management Organisation",
         },
         "britishmuseum.org": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "derrystrabane.com": {
-            "sector": None,
-            "agreement_signed": False,
-        },
-        "highwaysengland.co.uk": {
-            "sector": None,
-            "agreement_signed": False,
+            "owner": "British Museum",
         },
+        "derrystrabane.com": None,
+        "highwaysengland.co.uk": None,
     }
 
     def __init__(self, email_address_or_domain):
 
-        for domain, attributes in self.domains.items():
-            if re.search(
-                "[\.|@]({})$".format(domain.replace(".", "\.")),
-                email_address_or_domain.lower()
-            ):
-                return
+        try:
+            self._match = sorted(
+                (
+                    domain for domain in self.domains.keys()
+                    if self._domain_matches(email_address_or_domain, domain)
+                ),
+                key=len
+            )[0]
+        except IndexError:
+            raise NotGovernmentDomain()
 
-        raise NotGovernmentDomain()
+        self.owner, self.sector, self.agreement_signed = self._get_details_of_domain()
+
+    @staticmethod
+    def _domain_matches(email_address_or_domain, domain):
+
+        email_address_or_domain = email_address_or_domain.lower()
+
+        return (email_address_or_domain == domain) or re.search(
+            "[\.|@]({})$".format(domain.replace(".", "\.")),
+            email_address_or_domain
+        )
+
+    def _get_details_of_domain(self):
+
+        details = self.domains[self._match]
+
+        if isinstance(details, str):
+            return GovernmentDomain(details)._get_details_of_domain()
+
+        elif isinstance(details, dict):
+            return(
+                details.get("owner"),
+                details.get("sector"),
+                bool(details.get("agreement_signed")),
+            )
+
+        else:
+            return(
+                None,
+                None,
+                False,
+            )