feat: Add function removePoliciesWithEffected (#95)

Signed-off-by: Edmond <edomondja@gmail.com>

Author: Edmond-J-A

src/model/Policy.lua

@@ -286,35 +286,30 @@ end
     * @return succeeds or not.
 ]]
 function Policy:removePolicies(sec, ptype, rules)
-    local size = #self.model[sec][ptype].policy
-    for _, rule in pairs(rules) do
-        for k, v in pairs(self.model[sec][ptype].policy) do
-            if Util.arrayEquals(rule, v) then
-                table.remove(self.model[sec][ptype].policy, k)
-                break
-            end
-        end
-    end
-
-    if size > #self.model[sec][ptype].policy then
-        return true
-    else
-        return false
-    end
+    return #self:removePoliciesWithEffected(sec, ptype, rules)~=0
 end
 
 --[[
-    * removeFilteredPolicyReturnsEffects removes policy rules based on field filters from the model.
+    * removePoliciesWithEffected removes policy rules from the model, and returns effected rules.
     *
     * @param sec the section, "p" or "g".
     * @param ptype the policy type, "p", "p2", .. or "g", "g2", ..
-    * @param fieldIndex the policy rule's start index to be matched.
-    * @param ... fieldValues the field values to be matched, value ""
-    *                    means not to match this field.
-    * @return succeeds(effects.size() > 0) or not.
+    * @param rules the policy rules.
+    *
+    * @return effected.
 ]]
-function Policy:removeFilteredPolicyReturnsEffects(sec, ptype, fieldIndex, ...)
-    return {}
+function Policy:removePoliciesWithEffected(sec, ptype, rules)
+    local effected={}
+    for _,rule in pairs(rules) do
+        for k, v in pairs(self.model[sec][ptype].policy) do
+            if Util.arrayEquals(rule, v) then
+                table.insert(effected,rule)
+                table.remove(self.model[sec][ptype].policy, k)
+                break
+            end
+        end
+    end
+    return effected
 end
 
 --[[

tests/model/model_spec.lua

@@ -87,6 +87,21 @@ describe("model tests", function()
         assert.is.False(m:removePolicy("p", "p", rule))
     end)
 
+    it("test removePoliciesWithEffected", function ()
+        local m = Model:new()
+        m:loadModel(basic_path)
+
+        local rules = {{'admin', 'domain1', 'data1', 'read'},{'admin', 'domain2', 'data2', 'read'},{'admin', 'domain1', 'data1', 'write'}}
+        assert.is.False(m:hasPolicies("p", "p", rules))
+
+        m:addPolicies("p", "p", rules)
+        assert.is.True(m:hasPolicies("p", "p", rules))
+
+        assert.are.same(m:removePoliciesWithEffected("p", "p", rules),rules)
+        assert.is.False(m:hasPolicies("p", "p", rules))
+        assert.is.False(m:removePolicy("p", "p", rules))
+    end)
+
     it("test addRolePolicy", function ()
         local m = Model:new()
         m:loadModel(rbac_path)