From a6109090e6c85a970c24096cad287e7ab3f8665c Mon Sep 17 00:00:00 2001
From: Ralph Bean <rbean@redhat.com>
Date: May 10 2018 14:57:39 +0000
Subject: Backport "special relevance" from dist-git.


https://src.fedoraproject.org/rpms/greenwave/blob/3b12bdd78258ab1d63976b5beddc0b98bbb4b9b2/f/0002-Special-relevance.patch

See the commit message of that linked patch for the original logic going into this.

The problem now is that I left it as a dist-git patch for so long, it doesn't
apply nicely.  The API v2 stuff that @dcallagh is working on should let us
delete this work, but we need this upstreamed to simplify the release process
in the meantime.

---

diff --git a/greenwave/api_v1.py b/greenwave/api_v1.py
index 3fcb1bb..a68f9c6 100644
--- a/greenwave/api_v1.py
+++ b/greenwave/api_v1.py
@@ -259,7 +259,10 @@ def make_decision():
 
     answers = []
     for item in subjects:
-        for policy in applicable_policies:
+        relevant_policies = [
+            policy for policy in applicable_policies
+            if policy.is_relevant_to(item)]
+        for policy in relevant_policies:
             answers.extend(policy.check(item, results, waivers))
 
     res = {
diff --git a/greenwave/policies.py b/greenwave/policies.py
index ba750cf..00ffb2e 100644
--- a/greenwave/policies.py
+++ b/greenwave/policies.py
@@ -322,6 +322,21 @@ class Policy(yaml.YAMLObject):
         return (decision_context == self.decision_context and
                 self._applies_to_product_version(product_version))
 
+    def is_relevant_to(self, item):
+        relevance_key = getattr(self, 'relevance_key', None)
+        relevance_value = getattr(self, 'relevance_value', None)
+
+        if relevance_key and relevance_value:
+            return item.get(relevance_key) == relevance_value
+
+        if relevance_key:
+            return relevance_key in item
+
+        if relevance_value:
+            return relevance_value in item.values()
+
+        return True
+
     def check(self, item, results, waivers):
         # If an item is about a package and it is in the blacklist, return RuleSatisfied()
         for package in self.blacklist:
@@ -350,6 +365,8 @@ class Policy(yaml.YAMLObject):
             'decision_context': self.decision_context,
             'rules': [rule.to_json() for rule in self.rules],
             'blacklist': self.blacklist,
+            'relevance_key': getattr(self, 'relevance_key', None),
+            'relevance_value': getattr(self, 'relevance_value', None),
         }
 
     def _applies_to_product_version(self, product_version):