bcupdate: add service.Match, parameter.assignDataType, service.matchPattern, server.collide

- datatype-s are required as arguments in Parse(), datatypes are built into the config parameters
 - collision detection compares : http method, pattern (both fixed, one/both captures)
 - test service.Match(); more to test
 - some refactor and fix tests

config/config_test.go

@@ -3,8 +3,12 @@ package config
 import (
 	"errors"
 	"fmt"
+	"net/http"
+	"net/http/httptest"
 	"strings"
 	"testing"
+
+	"git.xdrm.io/go/aicra/config/datatype/builtin"
 )
 
 func TestLegalServiceName(t *testing.T) {
@@ -219,22 +223,22 @@ func TestParamEmptyRenameNoRename(t *testing.T) {
 			"path": "/",
 			"info": "valid-description",
 			"in": {
-				"original": { "info": "valid-desc", "type": "valid-type", "name": "" }
+				"original": { "info": "valid-desc", "type": "any", "name": "" }
 			}
 		}
 	]`)
-	srv, err := Parse(reader)
+	srv, err := Parse(reader, builtin.AnyDataType{})
 	if err != nil {
 		t.Errorf("unexpected error: '%s'", err)
 		t.FailNow()
 	}
 
-	if len(srv) < 1 {
+	if len(srv.services) < 1 {
 		t.Errorf("expected a service")
 		t.FailNow()
 	}
 
-	for _, param := range (srv)[0].Input {
+	for _, param := range srv.services[0].Input {
 		if param.Rename != "original" {
 			t.Errorf("expected the parameter 'original' not to be renamed to '%s'", param.Rename)
 			t.FailNow()
@@ -249,24 +253,24 @@ func TestOptionalParam(t *testing.T) {
 			"path": "/",
 			"info": "valid-description",
 			"in": {
-				"optional": { "info": "valid-desc", "type": "?optional-type" },
-				"required": { "info": "valid-desc", "type": "required-type" },
-				"required2": { "info": "valid-desc", "type": "a" },
-				"optional2": { "info": "valid-desc", "type": "?a" }
+				"optional": { "info": "optional-type", "type": "?bool" },
+				"required": { "info": "required-type", "type": "bool" },
+				"required2": { "info": "required", "type": "any" },
+				"optional2": { "info": "optional", "type": "?any" }
 			}
 		}
 	]`)
-	srv, err := Parse(reader)
+	srv, err := Parse(reader, builtin.AnyDataType{}, builtin.BoolDataType{})
 	if err != nil {
 		t.Errorf("unexpected error: '%s'", err)
 		t.FailNow()
 	}
 
-	if len(srv) < 1 {
+	if len(srv.services) < 1 {
 		t.Errorf("expected a service")
 		t.FailNow()
 	}
-	for pName, param := range (srv)[0].Input {
+	for pName, param := range srv.services[0].Input {
 
 		if pName == "optional" || pName == "optional2" {
 			if !param.Optional {
@@ -389,7 +393,7 @@ func TestParseParameters(t *testing.T) {
 					"path": "/",
 					"info": "info",
 					"in": {
-						"param1": { "info": "valid", "type": "a" }
+						"param1": { "info": "valid", "type": "any" }
 					}
 				}
 			]`,
@@ -402,7 +406,7 @@ func TestParseParameters(t *testing.T) {
 					"path": "/",
 					"info": "info",
 					"in": {
-						"param1": { "info": "valid", "type": "?valid" }
+						"param1": { "info": "valid", "type": "?any" }
 					}
 				}
 			]`,
@@ -416,8 +420,8 @@ func TestParseParameters(t *testing.T) {
 					"path": "/",
 					"info": "info",
 					"in": {
-						"param1": { "info": "valid", "type": "valid" },
-						"param2": { "info": "valid", "type": "valid", "name": "param1" }
+						"param1": { "info": "valid", "type": "any" },
+						"param2": { "info": "valid", "type": "any", "name": "param1" }
 					}
 				}
 			]`,
@@ -431,8 +435,8 @@ func TestParseParameters(t *testing.T) {
 					"path": "/",
 					"info": "info",
 					"in": {
-						"param1": { "info": "valid", "type": "valid", "name": "param2" },
-						"param2": { "info": "valid", "type": "valid" }
+						"param1": { "info": "valid", "type": "any", "name": "param2" },
+						"param2": { "info": "valid", "type": "any" }
 					}
 				}
 			]`,
@@ -446,8 +450,8 @@ func TestParseParameters(t *testing.T) {
 					"path": "/",
 					"info": "info",
 					"in": {
-						"param1": { "info": "valid", "type": "valid", "name": "conflict" },
-						"param2": { "info": "valid", "type": "valid", "name": "conflict" }
+						"param1": { "info": "valid", "type": "any", "name": "conflict" },
+						"param2": { "info": "valid", "type": "any", "name": "conflict" }
 					}
 				}
 			]`,
@@ -462,8 +466,8 @@ func TestParseParameters(t *testing.T) {
 					"path": "/",
 					"info": "info",
 					"in": {
-						"param1": { "info": "valid", "type": "valid", "name": "freename" },
-						"param2": { "info": "valid", "type": "valid", "name": "freename2" }
+						"param1": { "info": "valid", "type": "any", "name": "freename" },
+						"param2": { "info": "valid", "type": "any", "name": "freename2" }
 					}
 				}
 			]`,
@@ -474,7 +478,7 @@ func TestParseParameters(t *testing.T) {
 	for i, test := range tests {
 
 		t.Run(fmt.Sprintf("method.%d", i), func(t *testing.T) {
-			_, err := Parse(strings.NewReader(test.Raw))
+			_, err := Parse(strings.NewReader(test.Raw), builtin.AnyDataType{})
 
 			if err == nil && test.Error != nil {
 				t.Errorf("expected an error: '%s'", test.Error.Error())
@@ -497,136 +501,141 @@ func TestParseParameters(t *testing.T) {
 }
 
 // todo: rewrite with new api format
-// func TestMatchSimple(t *testing.T) {
-// 	tests := []struct {
-// 		Raw         string
-// 		Path        []string
-// 		BrowseDepth int
-// 		ValidDepth  bool
-// 	}{
-// 		{ // false positive -1
-// 			`{
-// 				"/" : {
-// 					"parent": {
-// 						"/": {
-// 							"subdir": {}
-// 						}
-// 					}
-// 				}
-// 			}`,
-// 			[]string{"parent", "subdir"},
-// 			1,
-// 			false,
-// 		},
-// 		{ // false positive +1
-// 			`{
-// 				"/" : {
-// 					"parent": {
-// 						"/": {
-// 							"subdir": {}
-// 						}
-// 					}
-// 				}
-// 			}`,
-// 			[]string{"parent", "subdir"},
-// 			3,
-// 			false,
-// 		},
+func TestMatchSimple(t *testing.T) {
+	tests := []struct {
+		Config string
+		URL    string
+		Match  bool
+	}{
+		{ // false positive -1
+			`[ {
+					"method": "GET",
+					"path": "/a",
+					"info": "info",
+					"in": {}
+			} ]`,
+			"/",
+			false,
+		},
+		{ // false positive +1
+			`[ {
+					"method": "GET",
+					"path": "/",
+					"info": "info",
+					"in": {}
+			} ]`,
+			"/a",
+			false,
+		},
+		{
+			`[ {
+					"method": "GET",
+					"path": "/a",
+					"info": "info",
+					"in": {}
+			} ]`,
+			"/a",
+			true,
+		},
+		{
+			`[ {
+					"method": "GET",
+					"path": "/a",
+					"info": "info",
+					"in": {}
+			} ]`,
+			"/a/",
+			true,
+		},
+		{
+			`[ {
+					"method": "GET",
+					"path": "/a/{id}",
+					"info": "info",
+					"in": {
+						"{id}": {
+							"info": "info",
+							"type": "bool"
+						}
+					}
+			} ]`,
+			"/a/12/",
+			false,
+		},
+		{
+			`[ {
+					"method": "GET",
+					"path": "/a/{id}",
+					"info": "info",
+					"in": {
+						"{id}": {
+							"info": "info",
+							"type": "int"
+						}
+					}
+			} ]`,
+			"/a/12/",
+			true,
+		},
+		{
+			`[ {
+					"method": "GET",
+					"path": "/a/{valid}",
+					"info": "info",
+					"in": {
+						"{id}": {
+							"info": "info",
+							"type": "bool"
+						}
+					}
+			} ]`,
+			"/a/12/",
+			false,
+		},
+		{
+			`[ {
+					"method": "GET",
+					"path": "/a/{valid}",
+					"info": "info",
+					"in": {
+						"{id}": {
+							"info": "info",
+							"type": "bool"
+						}
+					}
+			} ]`,
+			"/a/true/",
+			true,
+		},
+	}
 
-// 		{
-// 			`{
-// 				"/" : {
-// 					"parent": {
-// 						"/": {
-// 							"subdir": {}
-// 						}
-// 					}
-// 				}
-// 			}`,
-// 			[]string{"parent", "subdir"},
-// 			2,
-// 			true,
-// 		},
-// 		{ // unknown path
-// 			`{
-// 				"/" : {
-// 					"parent": {
-// 						"/": {
-// 							"subdir": {}
-// 						}
-// 					}
-// 				}
-// 			}`,
-// 			[]string{"x", "y"},
-// 			2,
-// 			false,
-// 		},
-// 		{ // unknown path
-// 			`{
-// 				"/" : {
-// 					"parent": {
-// 						"/": {
-// 							"subdir": {}
-// 						}
-// 					}
-// 				}
-// 			}`,
-// 			[]string{"parent", "y"},
-// 			1,
-// 			true,
-// 		},
-// 		{ // Warning: this case is important to understand the precedence of service paths over
-// 			// the value of some variables. Here if we send a string parameter in the GET method that
-// 			// unfortunately is equal to 'subdir', it will call the sub-service /parent/subdir' instead
-// 			// of the service /parent with its parameter set to the value 'subdir'.
-// 			`{
-// 				"/" : {
-// 					"parent": {
-// 						"/": {
-// 							"subdir": {}
-// 						},
-// 						"GET": {
-// 							"info": "valid-desc",
-// 							"in": {
-// 								"some-value": {
-// 									"info": "valid-desc",
-// 									"type": "valid-type"
-// 								}
-// 							}
-// 						}
-// 					}
-// 				}
-// 			}`,
-// 			[]string{"parent", "subdir"},
-// 			2,
-// 			true,
-// 		},
-// 	}
+	for i, test := range tests {
 
-// 	for i, test := range tests {
+		t.Run(fmt.Sprintf("method.%d", i), func(t *testing.T) {
+			srv, err := Parse(strings.NewReader(test.Config), builtin.AnyDataType{}, builtin.IntDataType{}, builtin.BoolDataType{})
 
-// 		t.Run(fmt.Sprintf("method.%d", i), func(t *testing.T) {
-// 			srv, err := Parse(strings.NewReader(test.Raw))
+			if err != nil {
+				t.Errorf("unexpected error: '%s'", err)
+				t.FailNow()
+			}
 
-// 			if err != nil {
-// 				t.Errorf("unexpected error: '%s'", err)
-// 				t.FailNow()
-// 			}
+			if len(srv.services) != 1 {
+				t.Errorf("expected to have 1 service, got %d", len(srv.services))
+				t.FailNow()
+			}
 
-// 			_, depth := srv.Match(test.Path)
-// 			if test.ValidDepth {
-// 				if depth != test.BrowseDepth {
-// 					t.Errorf("expected a depth of %d (got %d)", test.BrowseDepth, depth)
-// 					t.FailNow()
-// 				}
-// 			} else {
-// 				if depth == test.BrowseDepth {
-// 					t.Errorf("expected a depth NOT %d (got %d)", test.BrowseDepth, depth)
-// 					t.FailNow()
-// 				}
+			req := httptest.NewRequest(http.MethodGet, test.URL, nil)
 
-// 			}
-// 		})
-// 	}
+			match := srv.services[0].Match(req)
+			if test.Match && !match {
+				t.Errorf("expected '%s' to match", test.URL)
+				t.FailNow()
+			}
+			if !test.Match && match {
+				t.Errorf("expected '%s' NOT to match", test.URL)
+				t.FailNow()
+			}
+		})
+	}
 
-// }
+}

config/datatype/types.go

@@ -4,9 +4,9 @@ package datatype
 // and casts the value into a compatible type
 type Validator func(value interface{}) (cast interface{}, valid bool)
 
-// Builder builds a DataType from the type definition (from the
+// DataType builds a DataType from the type definition (from the
 // configuration field "type") and returns NIL if the type
 // definition does not match this DataType
-type Builder interface {
+type DataType interface {
 	Build(typeDefinition string) Validator
 }

config/errors.go

@@ -38,6 +38,9 @@ const ErrMissingDescription = Error("missing description")
 // ErrMissingParamDesc - a parameter is missing its description
 const ErrMissingParamDesc = Error("missing parameter description")
 
+// ErrUnknownDataType - a parameter has an unknown datatype name
+const ErrUnknownDataType = Error("unknown data type")
+
 // ErrIllegalParamName - a parameter has an illegal name
 const ErrIllegalParamName = Error("parameter name must not begin/end with '_'")
 

config/func.go

@@ -0,0 +1,15 @@
+package config
+
+import "strings"
+
+// splits an URL without empty sets
+func splitURL(url string) []string {
+	trimmed := strings.Trim(url, " /\t\r\n")
+	split := strings.Split(trimmed, "/")
+
+	// remove empty set when empty url
+	if len(split) == 1 && len(split[0]) == 0 {
+		return []string{}
+	}
+	return split
+}

config/parameter.go

@@ -1,5 +1,7 @@
 package config
 
+import "git.xdrm.io/go/aicra/config/datatype"
+
 func (param *Parameter) checkAndFormat() error {
 
 	// missing description
@@ -20,3 +22,14 @@ func (param *Parameter) checkAndFormat() error {
 
 	return nil
 }
+
+// assigns the first matching data type from the type definition
+func (param *Parameter) assignDataType(types []datatype.DataType) bool {
+	for _, dtype := range types {
+		param.Validator = dtype.Build(param.Type)
+		if param.Validator != nil {
+			return true
+		}
+	}
+	return false
+}

config/service.go

@@ -4,11 +4,26 @@ import (
 	"fmt"
 	"net/http"
 	"strings"
+
+	"git.xdrm.io/go/aicra/config/datatype"
 )
 
 // Match returns if this service would handle this HTTP request
 func (svc *Service) Match(req *http.Request) bool {
-	return false
+	// method
+	if req.Method != svc.Method {
+		return false
+	}
+
+	// check path
+	if !svc.matchPattern(req.RequestURI) {
+		return false
+	}
+
+	// check and extract input
+	// todo: check if input match
+
+	return true
 }
 
 func (svc *Service) checkMethod() error {
@@ -68,7 +83,7 @@ func (svc *Service) checkPattern() error {
 	return nil
 }
 
-func (svc *Service) checkAndFormatInput() error {
+func (svc *Service) checkAndFormatInput(types []datatype.DataType) error {
 
 	// ignore no parameter
 	if svc.Input == nil || len(svc.Input) < 1 {
@@ -94,6 +109,10 @@ func (svc *Service) checkAndFormatInput() error {
 			return fmt.Errorf("%s: %w", paramName, err)
 		}
 
+		if !param.assignDataType(types) {
+			return fmt.Errorf("%s: %w", paramName, ErrUnknownDataType)
+		}
+
 		// check for name/rename conflict
 		for paramName2, param2 := range svc.Input {
 			// ignore self
@@ -114,3 +133,48 @@ func (svc *Service) checkAndFormatInput() error {
 
 	return nil
 }
+
+// checks if an uri matches the service's pattern
+func (svc *Service) matchPattern(uri string) bool {
+	uriparts := splitURL(uri)
+	parts := splitURL(svc.Pattern)
+
+	// fail if size differ
+	if len(uriparts) != len(parts) {
+		return false
+	}
+
+	// root url '/'
+	if len(parts) == 0 {
+		return true
+	}
+
+	// check part by part
+	for i, part := range parts {
+		uripart := uriparts[i]
+
+		isCapture := len(part) > 0 && part[0] == '{'
+
+		// if no capture -> check equality
+		if !isCapture {
+			if part != uripart {
+				return false
+			}
+			continue
+		}
+
+		param, exists := svc.Input[part]
+
+		// fail if no validator
+		if !exists || param.Validator == nil {
+			return false
+		}
+
+		// fail if not type-valid
+		if _, valid := param.Validator(uripart); !valid {
+			return false
+		}
+	}
+
+	return true
+}

config/services.go

@@ -6,38 +6,123 @@ import (
 	"io"
 	"net/http"
 	"strings"
+
+	"git.xdrm.io/go/aicra/config/datatype"
 )
 
 // Parse builds a server configuration from a json reader and checks for most format errors.
-func Parse(r io.Reader) (Services, error) {
-	services := make(Services, 0)
+// you can provide additional DataTypes as variadic arguments
+func Parse(r io.Reader, dtypes ...datatype.DataType) (*Server, error) {
+	server := &Server{
+		types:    make([]datatype.DataType, 0),
+		services: make([]*Service, 0),
+	}
+	// add data types
+	for _, dtype := range dtypes {
+		server.types = append(server.types, dtype)
+	}
 
-	err := json.NewDecoder(r).Decode(&services)
-	if err != nil {
+	// parse JSON
+	if err := json.NewDecoder(r).Decode(&server.services); err != nil {
 		return nil, fmt.Errorf("%s: %w", ErrRead, err)
 	}
 
-	err = services.checkAndFormat()
-	if err != nil {
+	// check services
+	if err := server.checkAndFormat(); err != nil {
 		return nil, fmt.Errorf("%s: %w", ErrFormat, err)
 	}
 
-	if services.collide() {
-		return nil, fmt.Errorf("%s: %w", ErrFormat, ErrPatternCollision)
+	// check collisions
+	if err := server.collide(); err != nil {
+		return nil, fmt.Errorf("%s: %w", ErrFormat, err)
 	}
 
-	return services, nil
+	return server, nil
 }
 
 // collide returns if there is collision between services
-func (svc Services) collide() bool {
-	// todo: implement pattern collision using types to check if braces can be equal to fixed uri parts
-	return false
+func (server *Server) collide() error {
+	length := len(server.services)
+
+	// for each service combination
+	for a := 0; a < length; a++ {
+		for b := a + 1; b < length; b++ {
+			aService := server.services[a]
+			bService := server.services[b]
+
+			// ignore different method
+			if aService.Method != bService.Method {
+				continue
+			}
+
+			aParts := splitURL(aService.Pattern)
+			bParts := splitURL(bService.Pattern)
+
+			// not same size
+			if len(aParts) != len(bParts) {
+				continue
+			}
+
+			// for each part
+			for pi, aPart := range aParts {
+				bPart := bParts[pi]
+
+				aIsCapture := len(aPart) > 1 && aPart[0] == '{'
+				bIsCapture := len(bPart) > 1 && bPart[0] == '{'
+
+				// both captures -> as we cannot check, consider a collision
+				if aIsCapture && bIsCapture {
+					return fmt.Errorf("%s: %s '%s'", ErrPatternCollision, aService.Method, aService.Pattern)
+				}
+
+				// no capture -> check equal
+				if !aIsCapture && !bIsCapture {
+					if aPart == bPart {
+						return fmt.Errorf("%s: %s '%s'", ErrPatternCollision, aService.Method, aService.Pattern)
+					}
+					continue
+				}
+
+				// A captures B -> check type (B is A ?)
+				if aIsCapture {
+					input, exists := aService.Input[aPart]
+
+					// fail if no type or no validator
+					if !exists || input.Validator == nil {
+						return fmt.Errorf("%s: %s '%s'", ErrPatternCollision, aService.Method, aService.Pattern)
+					}
+
+					// fail if not valid
+					if _, valid := input.Validator(aPart); !valid {
+						return fmt.Errorf("%s: %s '%s'", ErrPatternCollision, aService.Method, aService.Pattern)
+					}
+
+					// B captures A -> check type (A is B ?)
+				} else {
+					input, exists := bService.Input[bPart]
+
+					// fail if no type or no validator
+					if !exists || input.Validator == nil {
+						return fmt.Errorf("%s: %s '%s'", ErrPatternCollision, aService.Method, aService.Pattern)
+					}
+
+					// fail if not valid
+					if _, valid := input.Validator(bPart); !valid {
+						return fmt.Errorf("%s: %s '%s'", ErrPatternCollision, aService.Method, aService.Pattern)
+					}
+				}
+
+			}
+
+		}
+	}
+
+	return nil
 }
 
 // Find a service matching an incoming HTTP request
-func (svc Services) Find(r *http.Request) *Service {
-	for _, service := range svc {
+func (server Server) Find(r *http.Request) *Service {
+	for _, service := range server.services {
 		if service.Match(r) {
 			return service
 		}
@@ -47,8 +132,8 @@ func (svc Services) Find(r *http.Request) *Service {
 }
 
 // checkAndFormat checks for errors and missing fields and sets default values for optional fields.
-func (svc Services) checkAndFormat() error {
-	for _, service := range svc {
+func (server Server) checkAndFormat() error {
+	for _, service := range server.services {
 
 		// check method
 		err := service.checkMethod()
@@ -69,7 +154,7 @@ func (svc Services) checkAndFormat() error {
 		}
 
 		// check input parameters
-		err = service.checkAndFormatInput()
+		err = service.checkAndFormatInput(server.types)
 		if err != nil {
 			return fmt.Errorf("%s '%s' [in]: %w", service.Method, service.Pattern, err)
 		}

config/types.go

@@ -13,10 +13,11 @@ type Parameter struct {
 	Description string `json:"info"`
 	Type        string `json:"type"`
 	Rename      string `json:"name,omitempty"`
-	Optional    bool
+	// Optional is set to true when the type is prefixed with '?'
+	Optional bool
 
-	// validator is set from the @Type
-	validator datatype.Validator
+	// Validator is inferred from @Type
+	Validator datatype.Validator
 }
 
 // Service represents a service definition (from api.json)
@@ -25,10 +26,13 @@ type Service struct {
 	Pattern     string                `json:"path"`
 	Scope       [][]string            `json:"scope"`
 	Description string                `json:"info"`
-	Download    *bool                 `json:"download"`
 	Input       map[string]*Parameter `json:"in"`
+	// Download    *bool                 `json:"download"`
 	// Output map[string]*Parameter `json:"out"`
 }
 
-// Services contains every service that represents a server configuration
-type Services []*Service
+// Server represents a full server configuration
+type Server struct {
+	types    []datatype.DataType
+	services []*Service
+}