add ModelType enum

src/common/common.types.ts

@@ -1,6 +1,11 @@
 import { Link } from "../models/Link.model";
 import {ASObject} from "../models/asObject/ASObject.model";
 
+export enum ModelType {
+    Object = 'Object',
+    Activity = 'Activity'
+}
+
 // TODO: implement
 export type Image = 'placeholder';
 export type Article = 'placeholder';

src/models/ASBase.model.ts

@@ -11,9 +11,10 @@ export interface ModelBaseAPWithContext {
 export class ASBase<T> {
     public fields: T & ModelBaseAPWithContext;
 
-    constructor(fields: T) {
+    constructor(type: string, fields: T) {
         // TODO: make recursive copy
         this.fields = {
+            type,
             ...fields,
         } as T & ModelBaseAPWithContext;
     }

src/models/IntransitiveActivity/IntransitiveActivity.model.ts

@@ -1,5 +1,6 @@
 import {ASBase} from "../ASBase.model";
 import {IntransitiveActivityFields} from './IntransitiveActivity.types';
+import {ModelType} from "../../common/common.types";
 
 /**
  * Instances of IntransitiveActivity are a subtype of
@@ -10,6 +11,6 @@ import {IntransitiveActivityFields} from './IntransitiveActivity.types';
  */
 export class IntransitiveActivity extends ASBase<IntransitiveActivityFields>{
     constructor(fields: IntransitiveActivityFields) {
-        super(fields);
+        super(ModelType.Activity, fields);
     }
 }

src/models/activity/Activity.model.ts

@@ -1,5 +1,6 @@
 import {ASBase} from "../ASBase.model";
 import { ActivityFields } from "./Activity.types";
+import {ModelType} from "../../common/common.types";
 
 /**
  * An Activity is a subtype of Object that describes some form of action that may happen,
@@ -11,6 +12,6 @@ import { ActivityFields } from "./Activity.types";
  */
 export class Activity extends ASBase<ActivityFields>{
     constructor(fields: ActivityFields) {
-        super(fields);
+        super(ModelType.Activity, fields);
     }
 }

src/models/asObject/ASObject.model.ts

@@ -1,5 +1,6 @@
 import {ASBase} from "../ASBase.model";
 import { ASObjectFields } from "./ASObject.types";
+import {ModelType} from "../../common/common.types";
 
 /**
  * Describes an object of any kind. The Object type serves as the base type for most of
@@ -10,6 +11,6 @@ import { ASObjectFields } from "./ASObject.types";
  */
 export class ASObject extends ASBase<ASObjectFields>{
     constructor(fields: ASObjectFields) {
-        super(fields);
+        super(ModelType.Object, fields);
     }
 }