Revert "fix!: export extension support types"

This reverts commit 4ebcd1f894.

src/index.js

@@ -1,10 +1,3 @@
-import VirtualMachine from './virtual-machine.js';
+const VirtualMachine = require('./virtual-machine');
 
-import ArgumentType from './extension-support/argument-type.js';
-import BlockType from './extension-support/block-type.js';
-
-export default VirtualMachine;
-export {
-    ArgumentType,
-    BlockType
-};
+module.exports = VirtualMachine;

src/virtual-machine.js

@@ -1,30 +1,28 @@
-import EventEmitter from 'events';
-import JSZip from 'jszip';
-import {Buffer} from 'buffer';
-import centralDispatch from './dispatch/central-dispatch.js';
-import ExtensionManager from './extension-support/extension-manager.js';
-import log from './util/log.js';
-import MathUtil from './util/math-util.js';
-import Runtime from './engine/runtime.js';
-import StringUtil from './util/string-util.js';
-import * as formatMessage from 'format-message';
-import Variable from './engine/variable.js';
-import newBlockIds from './util/new-block-ids.js';
-import {loadCostume} from './import/load-costume.js';
-import {loadSound} from './import/load-sound.js';
-import {serializeSounds, serializeCostumes} from './serialization/serialize-assets.js';
-import 'canvas-toBlob';
-import validate from 'scratch-parser';
-import * as scratchSb1Converter from 'scratch-sb1-converter';
-import sb3 from './serialization/sb3.js';
-import sb2 from './serialization/sb2.js';
-
 let _TextEncoder;
 if (typeof TextEncoder === 'undefined') {
     _TextEncoder = require('text-encoding').TextEncoder;
 } else {
     _TextEncoder = TextEncoder;
 }
+const EventEmitter = require('events');
+const JSZip = require('jszip');
+
+const Buffer = require('buffer').Buffer;
+const centralDispatch = require('./dispatch/central-dispatch');
+const ExtensionManager = require('./extension-support/extension-manager');
+const log = require('./util/log');
+const MathUtil = require('./util/math-util');
+const Runtime = require('./engine/runtime');
+const StringUtil = require('./util/string-util');
+const formatMessage = require('format-message');
+
+const Variable = require('./engine/variable');
+const newBlockIds = require('./util/new-block-ids');
+
+const {loadCostume} = require('./import/load-costume.js');
+const {loadSound} = require('./import/load-sound.js');
+const {serializeSounds, serializeCostumes} = require('./serialization/serialize-assets');
+require('canvas-toBlob');
 
 const RESERVED_NAMES = ['_mouse_', '_stage_', '_edge_', '_myself_', '_random_'];
 
@@ -319,6 +317,7 @@ class VirtualMachine extends EventEmitter {
         }
 
         const validationPromise = new Promise((resolve, reject) => {
+            const validate = require('scratch-parser');
             // The second argument of false below indicates to the validator that the
             // input should be parsed/validated as an entire project (and not a single sprite)
             validate(input, false, (error, res) => {
@@ -327,7 +326,7 @@ class VirtualMachine extends EventEmitter {
             });
         })
             .catch(error => {
-                const {SB1File, ValidationError} = scratchSb1Converter;
+                const {SB1File, ValidationError} = require('scratch-sb1-converter');
 
                 try {
                     const sb1 = new SB1File(input);
@@ -463,6 +462,7 @@ class VirtualMachine extends EventEmitter {
      * @return {string} Serialized state of the runtime.
      */
     toJSON (optTargetId) {
+        const sb3 = require('./serialization/sb3');
         return StringUtil.stringify(sb3.serialize(this.runtime, optTargetId));
     }
 
@@ -495,9 +495,11 @@ class VirtualMachine extends EventEmitter {
         const deserializePromise = function () {
             const projectVersion = projectJSON.projectVersion;
             if (projectVersion === 2) {
+                const sb2 = require('./serialization/sb2');
                 return sb2.deserialize(projectJSON, runtime, false, zip);
             }
             if (projectVersion === 3) {
+                const sb3 = require('./serialization/sb3');
                 return sb3.deserialize(projectJSON, runtime, zip);
             }
             // TODO: reject with an Error (possible breaking API change!)
@@ -587,6 +589,7 @@ class VirtualMachine extends EventEmitter {
         }
 
         const validationPromise = new Promise((resolve, reject) => {
+            const validate = require('scratch-parser');
             // The second argument of true below indicates to the parser/validator
             // that the given input should be treated as a single sprite and not
             // an entire project
@@ -629,6 +632,8 @@ class VirtualMachine extends EventEmitter {
      */
     _addSprite2 (sprite, zip) {
         // Validate & parse
+
+        const sb2 = require('./serialization/sb2');
         return sb2.deserialize(sprite, this.runtime, true, zip)
             .then(({targets, extensions}) =>
                 this.installTargets(targets, extensions, false));
@@ -642,6 +647,7 @@ class VirtualMachine extends EventEmitter {
      */
     _addSprite3 (sprite, zip) {
         // Validate & parse
+        const sb3 = require('./serialization/sb3');
         return sb3
             .deserialize(sprite, this.runtime, zip, true)
             .then(({targets, extensions}) => this.installTargets(targets, extensions, false));
@@ -1241,6 +1247,8 @@ class VirtualMachine extends EventEmitter {
      * @return {!Promise} Promise that resolves when the extensions and blocks have been added.
      */
     shareBlocksToTarget (blocks, targetId, optFromTargetId) {
+        const sb3 = require('./serialization/sb3');
+
         const copiedBlocks = JSON.parse(JSON.stringify(blocks));
         newBlockIds(copiedBlocks);
         const target = this.runtime.getTargetById(targetId);
@@ -1575,4 +1583,4 @@ class VirtualMachine extends EventEmitter {
     }
 }
 
-export default VirtualMachine;
+module.exports = VirtualMachine;