Refactor JSON generation process to support a plugin architecture (TypeStrong#597)

* refactor JSON serialization from toObject() to serialization master plugin and child plugins, mimics 1:1 output of toObject() logic

* add es6 core types (for Object.assign, arrays etc..)

* add @depracated tag to all toObject() methods.

It is essential that they are removed, if not the code will contain duplicate logic which is a risk over time.

* flip the switch on serialization plugins

* add some event data

* fix typo in null check

* support `TypeOperator` sertialization

* fix wrong serialization of get/set/index signature

this is a legacy bug that was taken from the old toObject implementation

Author: shlomiassaf

src/lib/application.ts

@@ -13,6 +13,7 @@ import { Minimatch, IMinimatch } from 'minimatch';
 
 import { Converter } from './converter/index';
 import { Renderer } from './output/renderer';
+import { Serializer } from './serialization';
 import { ProjectReflection } from './models/index';
 import { Logger, ConsoleLogger, CallbackLogger, PluginHost, writeFile } from './utils/index';
 
@@ -48,6 +49,11 @@ export class Application extends ChildableComponent<Application, AbstractCompone
      */
     renderer: Renderer;
 
+    /**
+     * The serializer used to generate JSON output.
+     */
+    serializer: Serializer;
+
     /**
      * The logger that should be used to output messages.
      */
@@ -92,6 +98,7 @@ export class Application extends ChildableComponent<Application, AbstractCompone
 
         this.logger    = new ConsoleLogger();
         this.converter = this.addComponent<Converter>('converter', Converter);
+        this.serializer = this.addComponent<Serializer>('serializer', Serializer);
         this.renderer  = this.addComponent<Renderer>('renderer', Renderer);
         this.plugins   = this.addComponent('plugins', PluginHost);
         this.options   = this.addComponent('options', Options);
@@ -221,7 +228,9 @@ export class Application extends ChildableComponent<Application, AbstractCompone
         }
 
         out = Path.resolve(out);
-        writeFile(out, JSON.stringify(project.toObject(), null, '\t'), false);
+        const eventData = { outputDirectory: Path.dirname(out), outputFile: Path.basename(out) };
+        const ser = this.serializer.projectToObject(project, { begin: eventData, end: eventData });
+        writeFile(out, JSON.stringify(ser, null, '\t'), false);
         this.logger.success('JSON written to %s', out);
 
         return true;

src/lib/models/ReflectionCategory.ts

@@ -51,6 +51,7 @@ export class ReflectionCategory {
 
     /**
      * Return a raw object representation of this reflection category.
+     * @deprecated Use serializers instead
      */
     toObject(): any {
         const result = {

src/lib/models/ReflectionGroup.ts

@@ -89,6 +89,7 @@ export class ReflectionGroup {
 
     /**
      * Return a raw object representation of this reflection group.
+     * @deprecated Use serializers instead
      */
     toObject(): any {
         const result = {

src/lib/models/comments/comment.ts

@@ -99,6 +99,7 @@ export class Comment {
 
     /**
      * Return a raw object representation of this comment.
+     * @deprecated Use serializers instead
      */
     toObject(): any {
         const result: any = {};

src/lib/models/comments/tag.ts

@@ -30,6 +30,7 @@ export class CommentTag {
 
     /**
      * Return a raw object representation of this tag.
+     * @deprecated Use serializers instead
      */
     toObject(): any {
         const result: any = {

src/lib/models/reflections/abstract.ts

@@ -551,6 +551,7 @@ export abstract class Reflection {
 
     /**
      * Return a raw object representation of this reflection.
+     * @deprecated Use serializers instead
      */
     toObject(): any {
         const result: any = {

src/lib/models/reflections/container.ts

@@ -54,6 +54,7 @@ export class ContainerReflection extends Reflection {
 
     /**
      * Return a raw object representation of this reflection.
+     * @deprecated Use serializers instead
      */
     toObject(): any {
         const result = super.toObject();

src/lib/models/reflections/declaration.ts

@@ -181,6 +181,7 @@ export class DeclarationReflection extends ContainerReflection implements Defaul
 
     /**
      * Return a raw object representation of this reflection.
+     * @deprecated Use serializers instead
      */
     toObject(): any {
         let result = super.toObject();

src/lib/models/reflections/parameter.ts

@@ -27,6 +27,7 @@ export class ParameterReflection extends Reflection implements DefaultValueConta
 
     /**
      * Return a raw object representation of this reflection.
+     * @deprecated Use serializers instead
      */
     toObject(): any {
         const result = super.toObject();

src/lib/models/reflections/project.ts

@@ -126,6 +126,7 @@ export class ProjectReflection extends ContainerReflection {
 
     /**
      * Return a raw object representation of this reflection.
+     * @deprecated Use serializers instead
      */
     toObject(): any {
         const result = super.toObject();