feat: add support for keymatch5 function (#159)

* feat: add KeyMatch5 matcher

Fixes #153

* test: add test for KeyMatch5

Author: mikyll

src/model/FunctionMap.lua

@@ -23,7 +23,8 @@ local FunctionMap = {
     ["keyMatch4"] = BuiltInFunctions.keyMatch4Func,
     ["regexMatch"] = BuiltInFunctions.regexMatchFunc,
     ["IPMatch"] = BuiltInFunctions.IPMatchFunc,
-    ["globMatch"] = BuiltInFunctions.globMatch
+    ["globMatch"] = BuiltInFunctions.globMatch,
+    ["keyMatch5"] = BuiltInFunctions.keyMatch4Func,
 }
 
 -- FunctionMap provides a set of built in functions

src/util/BuiltInFunctions.lua

@@ -19,7 +19,7 @@ local BuiltInFunctions = {}
 
 function BuiltInFunctions.validateVariadicArgs(expectedLen, args)
     if #args ~= expectedLen then
-        return error("Expected"..expectedLen.." arguments, but got "..#args)
+        return error("Expected "..expectedLen.." arguments, but got "..#args)
     end
     for i=1,expectedLen do
         if type(args[i])~="string" then
@@ -247,6 +247,30 @@ function BuiltInFunctions.globMatch(key1, key2)
     end
 end
 
+-- Wrapper for keyMatch5
+function BuiltInFunctions.keyMatch5Func(args)
+    BuiltInFunctions.validateVariadicArgs(2, args)
+    return BuiltInFunctions.keyMatch5(args[1], args[2])
+end
+
+-- KeyMatch5 determines whether key1 matches the pattern of key2 (similar to RESTful path), key2 can contain a *
+-- For example,
+-- - "/foo/bar?status=1&type=2" matches "/foo/bar"
+-- - "/parent/child1" and "/parent/child1" matches "/parent/*"
+-- - "/parent/child1?status=1" matches "/parent/*"
+function BuiltInFunctions.keyMatch5(key1, key2)
+    local i = string.find(key1, "?", 1, true)
+
+    if i then
+        key1 = string.sub(key1, 1, i - 1)
+    end
+
+    key2 = string.gsub(key2, "/%*", "/.*")
+    key2 = string.gsub(key2, "%{[^/]+%}", "[^/]+")
+
+    return string.match(key1, "^" .. key2 .. "$") ~= nil
+end
+
 -- GenerateGFunction is the factory method of the g(_, _) function.
 function BuiltInFunctions.generateGFunction(rm)
     local function f(args)

tests/util/built_in_functions_spec.lua

@@ -200,4 +200,46 @@ describe("BuiltInFunctions tests", function ()
         assert.is.False(BuiltInFunctions.IPMatch("192.168.2.124", "192.168.2.123"))
         assert.is.False(BuiltInFunctions.IPMatch("192.166.2.123", "192.168.2.123"))
     end)
+    
+    it("keyMatch5 tests", function ()
+        assert.has_error(function () BuiltInFunctions.keyMatch5Func({"/foo"}) end, "Expected 2 arguments, but got 1")
+        assert.has_error(function () BuiltInFunctions.keyMatch5Func({"/foo/create/123", "/foo/*", "/foo/update/123"}) end, "Expected 2 arguments, but got 3")
+        assert.has_error(function () BuiltInFunctions.keyMatch5Func({"/parent/123", true}) end, "Argument must be a string")
+        
+        assert.is.True(BuiltInFunctions.keyMatch5("/parent/child?status=1&type=2", "/parent/child"))
+        assert.is.False(BuiltInFunctions.keyMatch5("/parent?status=1&type=2", "/parent/child"))
+
+        assert.is.True(BuiltInFunctions.keyMatch5("/parent/child/?status=1&type=2", "/parent/child/"))
+        assert.is.False(BuiltInFunctions.keyMatch5("/parent/child/?status=1&type=2", "/parent/child"))
+        assert.is.False(BuiltInFunctions.keyMatch5("/parent/child?status=1&type=2", "/parent/child/"))
+        
+        assert.is.True(BuiltInFunctions.keyMatch5("/foo", "/foo"))
+        assert.is.True(BuiltInFunctions.keyMatch5("/foo", "/foo*"))
+        assert.is.False(BuiltInFunctions.keyMatch5("/foo", "/foo/*"))
+        assert.is.False(BuiltInFunctions.keyMatch5("/foo/bar", "/foo"))
+        assert.is.False(BuiltInFunctions.keyMatch5("/foo/bar", "/foo*"))
+        assert.is.True(BuiltInFunctions.keyMatch5("/foo/bar", "/foo/*"))
+        assert.is.False(BuiltInFunctions.keyMatch5("/foobar", "/foo"))
+        assert.is.False(BuiltInFunctions.keyMatch5("/foobar", "/foo*"))
+        assert.is.False(BuiltInFunctions.keyMatch5("/foobar", "/foo/*"))
+
+        assert.is.False(BuiltInFunctions.keyMatch5("/", "/{resource}"))
+        assert.is.True(BuiltInFunctions.keyMatch5("/resource1", "/{resource}"))
+        assert.is.False(BuiltInFunctions.keyMatch5("/myid", "/{id}/using/{resId}"))
+        assert.is.True(BuiltInFunctions.keyMatch5("/myid/using/myresid", "/{id}/using/{resId}"))
+        
+        assert.is.False(BuiltInFunctions.keyMatch5("/proxy/myid", "/proxy/{id}/*"))
+        assert.is.True(BuiltInFunctions.keyMatch5("/proxy/myid/", "/proxy/{id}/*"))
+        assert.is.True(BuiltInFunctions.keyMatch5("/proxy/myid/res", "/proxy/{id}/*"))
+        assert.is.True(BuiltInFunctions.keyMatch5("/proxy/myid/res/res2", "/proxy/{id}/*"))
+        assert.is.True(BuiltInFunctions.keyMatch5("/proxy/myid/res/res2/res3", "/proxy/{id}/*"))
+        assert.is.False(BuiltInFunctions.keyMatch5("/proxy/", "/proxy/{id}/*"))
+        
+        assert.is.False(BuiltInFunctions.keyMatch5("/proxy/myid?status=1&type=2", "/proxy/{id}/*"))
+        assert.is.True(BuiltInFunctions.keyMatch5("/proxy/myid/", "/proxy/{id}/*"))
+        assert.is.True(BuiltInFunctions.keyMatch5("/proxy/myid/res?status=1&type=2", "/proxy/{id}/*"))
+        assert.is.True(BuiltInFunctions.keyMatch5("/proxy/myid/res/res2?status=1&type=2", "/proxy/{id}/*"))
+        assert.is.True(BuiltInFunctions.keyMatch5("/proxy/myid/res/res2/res3?status=1&type=2", "/proxy/{id}/*"))
+        assert.is.False(BuiltInFunctions.keyMatch5("/proxy/", "/proxy/{id}/*"))
+    end)
 end)