Add bindings hook

v3/examples/binding/GreetService.go

@@ -0,0 +1,8 @@
+package main
+
+type GreetService struct {
+}
+
+func (*GreetService) Greet(name string) string {
+	return "Hello " + name
+}

v3/examples/binding/main.go

@@ -4,17 +4,13 @@ import (
 	_ "embed"
 	"log"
 
-	"github.com/wailsapp/wails/v3/examples/binding/services"
 	"github.com/wailsapp/wails/v3/pkg/application"
 )
 
-type localStruct struct{}
-
 func main() {
 	app := application.New(application.Options{
 		Bind: []interface{}{
-			&localStruct{},
-			&services.GreetService{},
+			&GreetService{},
 		},
 	})
 

v3/examples/binding/models/index.ts

@@ -1,8 +0,0 @@
-// Code generated by tygo. DO NOT EDIT.
-
-//////////
-// source: person.go
-
-export interface Person {
-  Name: string;
-}

v3/examples/binding/models/person.go

@@ -1,5 +0,0 @@
-package models
-
-type Person struct {
-	Name string
-}

v3/examples/binding/services/GreetService.go

@@ -1,23 +0,0 @@
-package services
-
-import (
-	"github.com/wailsapp/wails/v3/examples/binding/models"
-)
-
-type GreetService struct {
-	SomeVariable int
-	lowercase    string
-	Parent       *models.Person
-}
-
-func (*GreetService) Greet(name string) string {
-	return "Hello " + name
-}
-
-func (g *GreetService) GetPerson() *models.Person {
-	return g.Parent
-}
-
-func (g *GreetService) SetPerson(person *models.Person) {
-	g.Parent = person
-}

v3/examples/binding/services/index.ts

@@ -1,9 +0,0 @@
-// Code generated by tygo. DO NOT EDIT.
-
-//////////
-// source: GreetService.go
-
-export interface GreetService {
-  SomeVariable: number /* int */;
-  Parent?: any /* models.Person */;
-}

v3/pkg/application/application.go

@@ -112,7 +112,8 @@ type App struct {
 	menuItemsLock sync.Mutex
 
 	// Running
-	running bool
+	running  bool
+	bindings *Bindings
 
 	// platform app
 	impl platformApp
@@ -270,6 +271,12 @@ func (a *App) Run() error {
 		}
 	}()
 
+	var err error
+	a.bindings, err = NewBindings(a.options.Bind)
+	if err != nil {
+		return err
+	}
+
 	// run windows
 	for _, window := range a.windows {
 		go window.run()

v3/pkg/application/bindings.go

@@ -0,0 +1,242 @@
+package application
+
+import (
+	"fmt"
+	"reflect"
+	"runtime"
+	"strings"
+)
+
+// Parameter defines a Go method parameter
+type Parameter struct {
+	Name        string `json:"name,omitempty"`
+	TypeName    string `json:"type"`
+	reflectType reflect.Type
+}
+
+func newParameter(Name string, Type reflect.Type) *Parameter {
+	return &Parameter{
+		Name:        Name,
+		TypeName:    Type.String(),
+		reflectType: Type,
+	}
+}
+
+// IsType returns true if the given
+func (p *Parameter) IsType(typename string) bool {
+	return p.TypeName == typename
+}
+
+// IsError returns true if the parameter type is an error
+func (p *Parameter) IsError() bool {
+	return p.IsType("error")
+}
+
+// BoundMethod defines all the data related to a Go method that is
+// bound to the Wails application
+type BoundMethod struct {
+	Name        string        `json:"name"`
+	Inputs      []*Parameter  `json:"inputs,omitempty"`
+	Outputs     []*Parameter  `json:"outputs,omitempty"`
+	Comments    string        `json:"comments,omitempty"`
+	Method      reflect.Value `json:"-"`
+	PackageName string
+	StructName  string
+	PackagePath string
+}
+
+type Bindings struct {
+	boundMethods map[string]map[string]map[string]*BoundMethod
+}
+
+func NewBindings(bindings []any) (*Bindings, error) {
+	b := &Bindings{
+		boundMethods: make(map[string]map[string]map[string]*BoundMethod),
+	}
+	for _, binding := range bindings {
+		err := b.Add(binding)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return b, nil
+}
+
+// Add the given struct methods to the Bindings
+func (b *Bindings) Add(structPtr interface{}) error {
+
+	methods, err := b.getMethods(structPtr)
+	if err != nil {
+		return fmt.Errorf("cannot bind value to app: %s", err.Error())
+	}
+
+	for _, method := range methods {
+		packageName := method.PackageName
+		structName := method.StructName
+		methodName := method.Name
+
+		// Add it as a regular method
+		if _, ok := b.boundMethods[packageName]; !ok {
+			b.boundMethods[packageName] = make(map[string]map[string]*BoundMethod)
+		}
+		if _, ok := b.boundMethods[packageName][structName]; !ok {
+			b.boundMethods[packageName][structName] = make(map[string]*BoundMethod)
+		}
+		b.boundMethods[packageName][structName][methodName] = method
+		//b.db.AddMethod(packageName, structName, methodName, method)
+	}
+	return nil
+}
+
+func (b *Bindings) getMethods(value interface{}) ([]*BoundMethod, error) {
+
+	// Create result placeholder
+	var result []*BoundMethod
+
+	// Check type
+	if !isStructPtr(value) {
+
+		if isStruct(value) {
+			name := reflect.ValueOf(value).Type().Name()
+			return nil, fmt.Errorf("%s is a struct, not a pointer to a struct", name)
+		}
+
+		if isFunction(value) {
+			name := runtime.FuncForPC(reflect.ValueOf(value).Pointer()).Name()
+			return nil, fmt.Errorf("%s is a function, not a pointer to a struct. Wails v2 has deprecated the binding of functions. Please wrap your functions up in a struct and bind a pointer to that struct.", name)
+		}
+
+		return nil, fmt.Errorf("not a pointer to a struct.")
+	}
+
+	// Process Struct
+	structType := reflect.TypeOf(value)
+	structValue := reflect.ValueOf(value)
+	structTypeString := structType.String()
+	baseName := structTypeString[1:]
+
+	// Process Methods
+	for i := 0; i < structType.NumMethod(); i++ {
+		methodDef := structType.Method(i)
+		methodName := methodDef.Name
+		packageName, structName, _ := strings.Cut(baseName, ".")
+		fullMethodName := baseName + "." + methodName
+		method := structValue.MethodByName(methodName)
+
+		// Create new method
+		boundMethod := &BoundMethod{
+			Name:        fullMethodName,
+			PackageName: packageName,
+			StructName:  structName,
+			Inputs:      nil,
+			Outputs:     nil,
+			Comments:    "",
+			Method:      method,
+		}
+
+		// Iterate inputs
+		methodType := method.Type()
+		inputParamCount := methodType.NumIn()
+		var inputs []*Parameter
+		for inputIndex := 0; inputIndex < inputParamCount; inputIndex++ {
+			input := methodType.In(inputIndex)
+			thisParam := newParameter("", input)
+			//
+			//thisInput := input
+			//
+			//if thisInput.Kind() == reflect.Slice {
+			//	thisInput = thisInput.Elem()
+			//}
+			//
+			//// Process struct pointer params
+			//if thisInput.Kind() == reflect.Ptr {
+			//	if thisInput.Elem().Kind() == reflect.Struct {
+			//		typ := thisInput.Elem()
+			//		a := reflect.New(typ)
+			//		s := reflect.Indirect(a).Interface()
+			//		name := typ.Name()
+			//		packageName := getPackageName(thisInput.String())
+			//		b.AddStructToGenerateTS(packageName, name, s)
+			//	}
+			//}
+			//
+			//// Process struct params
+			//if thisInput.Kind() == reflect.Struct {
+			//	a := reflect.New(thisInput)
+			//	s := reflect.Indirect(a).Interface()
+			//	name := thisInput.Name()
+			//	packageName := getPackageName(thisInput.String())
+			//	b.AddStructToGenerateTS(packageName, name, s)
+			//}
+
+			inputs = append(inputs, thisParam)
+		}
+
+		boundMethod.Inputs = inputs
+
+		outputParamCount := methodType.NumOut()
+		var outputs []*Parameter
+		for outputIndex := 0; outputIndex < outputParamCount; outputIndex++ {
+			output := methodType.Out(outputIndex)
+			thisParam := newParameter("", output)
+			//
+			//thisOutput := output
+			//
+			//if thisOutput.Kind() == reflect.Slice {
+			//	thisOutput = thisOutput.Elem()
+			//}
+			//
+			//// Process struct pointer params
+			//if thisOutput.Kind() == reflect.Ptr {
+			//	if thisOutput.Elem().Kind() == reflect.Struct {
+			//		typ := thisOutput.Elem()
+			//		a := reflect.New(typ)
+			//		s := reflect.Indirect(a).Interface()
+			//		name := typ.Name()
+			//		packageName := getPackageName(thisOutput.String())
+			//	}
+			//}
+			//
+			//// Process struct params
+			//if thisOutput.Kind() == reflect.Struct {
+			//	a := reflect.New(thisOutput)
+			//	s := reflect.Indirect(a).Interface()
+			//	name := thisOutput.Name()
+			//	packageName := getPackageName(thisOutput.String())
+			//	b.AddStructToGenerateTS(packageName, name, s)
+			//}
+
+			outputs = append(outputs, thisParam)
+		}
+		boundMethod.Outputs = outputs
+
+		// Save method in result
+		result = append(result, boundMethod)
+
+	}
+	return result, nil
+}
+
+// isStructPtr returns true if the value given is a
+// pointer to a struct
+func isStructPtr(value interface{}) bool {
+	return reflect.ValueOf(value).Kind() == reflect.Ptr &&
+		reflect.ValueOf(value).Elem().Kind() == reflect.Struct
+}
+
+// isFunction returns true if the given value is a function
+func isFunction(value interface{}) bool {
+	return reflect.ValueOf(value).Kind() == reflect.Func
+}
+
+// isStructPtr returns true if the value given is a struct
+func isStruct(value interface{}) bool {
+	return reflect.ValueOf(value).Kind() == reflect.Struct
+}
+
+func getPackageName(in string) string {
+	result := strings.Split(in, ".")[0]
+	result = strings.ReplaceAll(result, "[]", "")
+	result = strings.ReplaceAll(result, "*", "")
+	return result
+}