WIP Refactor the doodad javascript API

pkg/scripting/api/api.go

@@ -0,0 +1,2 @@
+// Package api defines the JavaScript API surface area for Doodad scripts.
+package api

pkg/scripting/api/console.go

@@ -0,0 +1,32 @@
+package api
+
+import "github.com/dop251/goja"
+
+/*
+Console is exported to the global scope with `console.log` and friends available.
+
+These functions have an API similar to that found in web browsers and node.js.
+*/
+type Console struct {
+	Log   func(string, ...interface{}) `json:"log"`
+	Debug func(string, ...interface{}) `json:"debug"`
+	Warn  func(string, ...interface{}) `json:"warn"`
+	Error func(string, ...interface{}) `json:"error"`
+}
+
+// ToMap converts the struct into a generic hash map.
+func (g Console) ToMap() map[string]interface{} {
+	return map[string]interface{}{
+		"log":   g.Log,
+		"debug": g.Debug,
+		"warn":  g.Warn,
+		"error": g.Error,
+	}
+}
+
+// Register the global functions in your JavaScript VM.
+func (g Console) Register(vm *goja.Runtime) {
+	for k, v := range g.ToMap() {
+		vm.Set(k, v)
+	}
+}

pkg/scripting/api/gameplay.go

@@ -0,0 +1,34 @@
+package api
+
+import (
+	"git.kirsle.net/go/render"
+	"github.com/dop251/goja"
+)
+
+// GameplayLevelControl
+type GameplayLevelControl struct {
+	// EndLevel ends the game in a "win" condition.
+	EndLevel func()
+
+	// FailLevel ends the game in a "fail" condition, with the message shown to the player.
+	FailLevel func(message string)
+
+	// SetCheckpoint updates the player's respawn position to the given point.
+	SetCheckpoint func(render.Point)
+}
+
+// ToMap converts the struct into a generic hash map.
+func (g GameplayLevelControl) ToMap() map[string]interface{} {
+	return map[string]interface{}{
+		"EndLevel":      g.EndLevel,
+		"FailLevel":     g.FailLevel,
+		"SetCheckpoint": g.SetCheckpoint,
+	}
+}
+
+// Register the global functions in your JavaScript VM.
+func (g GameplayLevelControl) Register(vm *goja.Runtime) {
+	for k, v := range g.ToMap() {
+		vm.Set(k, v)
+	}
+}

pkg/scripting/api/time.go

@@ -0,0 +1,61 @@
+// Package api defines the JavaScript API surface area for Doodad scripts.
+package api
+
+import (
+	"time"
+
+	"github.com/dop251/goja"
+)
+
+// Time functions exposed on the global scope like `time.Now()`.
+//
+// They are mainly a direct export of useful things from the Go `time` package.
+type Time struct {
+	Now   func() time.Time
+	Since func(time.Time) time.Duration
+	Add   func(t time.Time, milliseconds int64) time.Time
+
+	// Multiples of time.Duration.
+	Hour        time.Duration
+	Minute      time.Duration
+	Second      time.Duration
+	Millisecond time.Duration
+	Microsecond time.Duration
+}
+
+// NewTime creates an instanced global `time` object for your JavaScript VM.
+func NewTime() Time {
+	return Time{
+		Now:   time.Now,
+		Since: time.Since,
+		Add: func(t time.Time, ms int64) time.Time {
+			return t.Add(time.Duration(ms) * time.Millisecond)
+		},
+		Hour:        time.Hour,
+		Minute:      time.Minute,
+		Second:      time.Second,
+		Millisecond: time.Millisecond,
+		Microsecond: time.Microsecond,
+	}
+}
+
+// ToMap converts the struct into a generic hash map.
+func (g Time) ToMap() map[string]interface{} {
+	return map[string]interface{}{
+		"Now":         g.Now,
+		"Since":       g.Since,
+		"Add":         g.Add,
+		"Hour":        g.Hour,
+		"Minute":      g.Minute,
+		"Second":      g.Second,
+		"Millisecond": g.Millisecond,
+		"Microsecond": g.Microsecond,
+	}
+}
+
+// Register the global functions in your JavaScript VM.
+func (g Time) Register(vm *goja.Runtime) {
+	for k, v := range g.ToMap() {
+		vm.Set(k, v)
+	}
+}

pkg/scripting/js_api.go

@@ -2,10 +2,10 @@ package scripting
 
 import (
 	"fmt"
-	"time"
 
 	"git.kirsle.net/SketchyMaze/doodle/pkg/log"
 	"git.kirsle.net/SketchyMaze/doodle/pkg/physics"
+	"git.kirsle.net/SketchyMaze/doodle/pkg/scripting/api"
 	"git.kirsle.net/SketchyMaze/doodle/pkg/shmem"
 	"git.kirsle.net/SketchyMaze/doodle/pkg/sound"
 	"git.kirsle.net/go/render"
@@ -29,14 +29,17 @@ func ProxyLog(vm *VM, fn func(string, ...interface{})) func(string, ...interface
 // NewJSProxy initializes the API structure for JavaScript binding.
 func NewJSProxy(vm *VM) JSProxy {
 
+	// jp := JSProxy{}
+	// return jp
+
 	return JSProxy{
 		// Console logging.
-		"console": map[string]interface{}{
-			"log":   ProxyLog(vm, log.Info),
-			"debug": ProxyLog(vm, log.Debug),
-			"warn":  ProxyLog(vm, log.Warn),
-			"error": ProxyLog(vm, log.Error),
-		},
+		"console": api.Console{
+			Log:   ProxyLog(vm, log.Info),
+			Debug: ProxyLog(vm, log.Debug),
+			Warn:  ProxyLog(vm, log.Warn),
+			Error: ProxyLog(vm, log.Error),
+		}.ToMap(),
 
 		// Audio API.
 		"Sound": map[string]interface{}{
@@ -53,18 +56,7 @@ func NewJSProxy(vm *VM) JSProxy {
 		"GetTick": func() uint64 {
 			return shmem.Tick
 		},
-		"time": map[string]interface{}{
-			"Now":   time.Now,
-			"Since": time.Since,
-			"Add": func(t time.Time, ms int64) time.Time {
-				return t.Add(time.Duration(ms) * time.Millisecond)
-			},
-			"Hour":        time.Hour,
-			"Minute":      time.Minute,
-			"Second":      time.Second,
-			"Millisecond": time.Millisecond,
-			"Microsecond": time.Microsecond,
-		},
+		"time": api.NewTime().ToMap(),
 
 		// Bindings into the VM.
 		"Events":        vm.Events,

pkg/scripting/supervisor_events.go

@@ -1,6 +1,9 @@
 package scripting
 
-import "git.kirsle.net/go/render"
+import (
+	"git.kirsle.net/SketchyMaze/doodle/pkg/scripting/api"
+	"git.kirsle.net/go/render"
+)
 
 /*
 RegisterEventHooks attaches the supervisor level event hooks into a JS VM.
@@ -13,24 +16,26 @@ Names registered:
   - SetCheckpoint(): update the player's respawn location.
 */
 func RegisterEventHooks(s *Supervisor, vm *VM) {
-	vm.Set("EndLevel", func() {
+	api.GameplayLevelControl{
+		EndLevel: func() {
 			if s.onLevelFail == nil {
 				panic("JS FailLevel(): No OnLevelFail handler attached to script supervisor")
 			}
 			s.onLevelExit()
-	})
-	vm.Set("FailLevel", func(message string) {
+		},
+		FailLevel: func(message string) {
 			if s.onLevelFail == nil {
 				panic("JS FailLevel(): No OnLevelFail handler attached to script supervisor")
 			}
 			s.onLevelFail(message)
-	})
-	vm.Set("SetCheckpoint", func(p render.Point) {
+		},
+		SetCheckpoint: func(p render.Point) {
 			if s.onSetCheckpoint == nil {
 				panic("JS SetCheckpoint(): No OnSetCheckpoint handler attached to script supervisor")
 			}
 			s.onSetCheckpoint(p)
-	})
+		},
+	}.Register(vm.vm)
 }
 
 // OnLevelExit registers an event hook for when a Level Exit doodad is reached.