Made .toJSON() implementations instance methods taking a POJO argument

src/classes/LabeledFaceDescriptors.ts

@@ -18,19 +18,18 @@ export class LabeledFaceDescriptors {
   public get label(): string { return this._label }
   public get descriptors(): Float32Array[] { return this._descriptors }
 
-  public static toJSON(ld: LabeledFaceDescriptors): string {
-    return `{"label":"${ld.label}","descriptors":[${ld.descriptors.map((d) => `[${Array.from(d)}]`)}]}`;
+  public toJSON(): any {
+    return {
+      label: this.label,
+      descriptors: this.descriptors.map((d) => Array.from(d))
+    };
   }
 
-  public static fromJSON(jsonString: string): LabeledFaceDescriptors {
-    return LabeledFaceDescriptors.fromPOJO(JSON.parse(jsonString));
-  }
-
-  public static fromPOJO(pojo: any): LabeledFaceDescriptors {
-    const descriptors = pojo.descriptors.map((d: any) => {
+  public static fromJSON(json: any): LabeledFaceDescriptors {
+    const descriptors = json.descriptors.map((d: any) => {
       return new Float32Array(d);
     });
-    return new LabeledFaceDescriptors(pojo.label, descriptors);
+    return new LabeledFaceDescriptors(json.label, descriptors);
   }
 
 }
\ No newline at end of file

src/globalApi/FaceMatcher.ts

@@ -67,18 +67,17 @@ export class FaceMatcher {
       : new FaceMatch('unknown', bestMatch.distance)
   }
 
-  public static toJSON(matcher: FaceMatcher): string {
-    return `{"distanceThreshold":${matcher.distanceThreshold},"labeledDescriptors":[${matcher.labeledDescriptors.map((ld) => LabeledFaceDescriptors.toJSON(ld))}]}`;
+  public toJSON(): any {
+    return {
+      distanceThreshold: this.distanceThreshold,
+      labeledDescriptors: this.labeledDescriptors.map((ld) => ld.toJSON())
+    };
   }
 
-  public static fromJSON(jsonString: string): FaceMatcher {
-    return FaceMatcher.fromPOJO(JSON.parse(jsonString));
-  }
-
-  public static fromPOJO(pojo: any): FaceMatcher {
-    const labeledDescriptors = pojo.labeledDescriptors
-      .map((ld: any) => LabeledFaceDescriptors.fromPOJO(ld));
-    return new FaceMatcher(labeledDescriptors, pojo.distanceThreshold);
+  public static fromJSON(json: any): FaceMatcher {
+    const labeledDescriptors = json.labeledDescriptors
+      .map((ld: any) => LabeledFaceDescriptors.fromJSON(ld));
+    return new FaceMatcher(labeledDescriptors, json.distanceThreshold);
   }
 
 }
\ No newline at end of file

test/tests/classes/LabeledFaceDescriptors.test.ts

@@ -9,21 +9,14 @@ describe('globalApi', () => {
     const f1 = new Float32Array([1, 2, 3]);
     const f2 = new Float32Array([4, 5, 6]);
 
-    it('toJSON()', () => {
-      expect(LabeledFaceDescriptors.toJSON(new LabeledFaceDescriptors(l1, [f1,f2]))).toBe(json);
+    it('JSON.stringify()', () => {
+      expect(JSON.stringify(new LabeledFaceDescriptors(l1, [f1,f2]))).toBe(json);
+      expect(JSON.stringify({ ld: new LabeledFaceDescriptors(l1, [f1,f2]) })).toBe(`{"ld":${json}}`);
+      expect(JSON.stringify([ new LabeledFaceDescriptors(l1, [f1,f2]) ])).toBe(`[${json}]`);
     });
 
     it('fromJSON()', () => {
-      const ld = LabeledFaceDescriptors.fromJSON(json);
-
-      expect(ld.label).toBe(l1);
-      expect(ld.descriptors.length).toBe(2);
-      expect(ld.descriptors[0]).toEqual(f1);
-      expect(ld.descriptors[1]).toEqual(f2);
-    });
-
-    it('fromPOJO()', () => {
-      const ld = LabeledFaceDescriptors.fromPOJO(JSON.parse(json));
+      const ld = LabeledFaceDescriptors.fromJSON(JSON.parse(json));
 
       expect(ld.label).toBe(l1);
       expect(ld.descriptors.length).toBe(2);
@@ -32,7 +25,7 @@ describe('globalApi', () => {
     });
 
     it('toJSON() => fromJSON()', () => {
-      const ld = LabeledFaceDescriptors.fromJSON(LabeledFaceDescriptors.toJSON(new LabeledFaceDescriptors(l1, [f1,f2])));
+      const ld = LabeledFaceDescriptors.fromJSON(new LabeledFaceDescriptors(l1, [f1,f2]).toJSON());
 
       expect(ld.label).toBe(l1);
       expect(ld.descriptors.length).toBe(2);

test/tests/globalApi/FaceMatcher.test.ts

@@ -18,12 +18,14 @@ describe('globalApi', () => {
       new LabeledFaceDescriptors(l2, [f3, f4])
     ];
 
-    it('toJSON()', () => {
-      expect(FaceMatcher.toJSON(new FaceMatcher(lds, dt))).toBe(json);
+    it('JSON.stringify()', () => {
+      expect(JSON.stringify(new FaceMatcher(lds, dt))).toBe(json);
+      expect(JSON.stringify({ m: new FaceMatcher(lds, dt) })).toBe(`{"m":${json}}`);
+      expect(JSON.stringify([ new FaceMatcher(lds, dt) ])).toBe(`[${json}]`);
     });
 
     it('fromJSON()', () => {
-      const fm = FaceMatcher.fromJSON(json);
+      const fm = FaceMatcher.fromJSON(JSON.parse(json));
 
       expect(fm.distanceThreshold).toBe(dt);
       expect(fm.labeledDescriptors.length).toBe(2);
@@ -37,23 +39,8 @@ describe('globalApi', () => {
       expect(fm.labeledDescriptors[1].descriptors[1]).toEqual(f4);
     });
 
-    it('fromPOJO()', () => {
-      const fm = FaceMatcher.fromPOJO(JSON.parse(json));
-
-      expect(fm.distanceThreshold).toBe(dt);
-      expect(fm.labeledDescriptors.length).toBe(2);
-      expect(fm.labeledDescriptors[0].label).toBe(l1);
-      expect(fm.labeledDescriptors[0].descriptors.length).toBe(2);
-      expect(fm.labeledDescriptors[0].descriptors[0]).toEqual(f1);
-      expect(fm.labeledDescriptors[0].descriptors[1]).toEqual(f2);
-      expect(fm.labeledDescriptors[1].label).toBe(l2);
-      expect(fm.labeledDescriptors[1].descriptors.length).toBe(2);
-      expect(fm.labeledDescriptors[1].descriptors[0]).toEqual(f3);
-      expect(fm.labeledDescriptors[1].descriptors[1]).toEqual(f4);
-    });
-
-    it('JSON.stringify() => fromJSON()', () => {
-      const fm = FaceMatcher.fromJSON(FaceMatcher.toJSON(new FaceMatcher(lds, dt)));
+    it('toJSON() => fromJSON()', () => {
+      const fm = FaceMatcher.fromJSON(new FaceMatcher(lds, dt).toJSON());
 
       expect(fm.distanceThreshold).toBe(dt);
       expect(fm.labeledDescriptors.length).toBe(2);