Merge pull request justadudewhohacks#397 from jderrough/master

Added FaceMatcher.toJSON()/.fromJSON()/.fromPOJO() and LabeledFaceDescriptors.toJSON()/.fromJSON()/.fromPOJO()

src/classes/LabeledFaceDescriptors.ts

@@ -17,4 +17,19 @@ export class LabeledFaceDescriptors {
 
   public get label(): string { return this._label }
   public get descriptors(): Float32Array[] { return this._descriptors }
+
+  public toJSON(): any {
+    return {
+      label: this.label,
+      descriptors: this.descriptors.map((d) => Array.from(d))
+    };
+  }
+
+  public static fromJSON(json: any): LabeledFaceDescriptors {
+    const descriptors = json.descriptors.map((d: any) => {
+      return new Float32Array(d);
+    });
+    return new LabeledFaceDescriptors(json.label, descriptors);
+  }
+
 }

src/globalApi/FaceMatcher.ts

@@ -67,4 +67,17 @@ export class FaceMatcher {
       : new FaceMatch('unknown', bestMatch.distance)
   }
 
+  public toJSON(): any {
+    return {
+      distanceThreshold: this.distanceThreshold,
+      labeledDescriptors: this.labeledDescriptors.map((ld) => ld.toJSON())
+    };
+  }
+
+  public static fromJSON(json: any): FaceMatcher {
+    const labeledDescriptors = json.labeledDescriptors
+      .map((ld: any) => LabeledFaceDescriptors.fromJSON(ld));
+    return new FaceMatcher(labeledDescriptors, json.distanceThreshold);
+  }
+
 }

test/tests/classes/LabeledFaceDescriptors.test.ts

@@ -0,0 +1,38 @@
+import { LabeledFaceDescriptors } from '../../../src';
+
+describe('globalApi', () => {
+
+  describe('LabeledFaceDescriptors', () => {
+
+    const json = '{"label":"foo","descriptors":[[1,2,3],[4,5,6]]}';
+    const l1 = 'foo';
+    const f1 = new Float32Array([1, 2, 3]);
+    const f2 = new Float32Array([4, 5, 6]);
+
+    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.parse(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('toJSON() => fromJSON()', () => {
+      const ld = LabeledFaceDescriptors.fromJSON(new LabeledFaceDescriptors(l1, [f1,f2]).toJSON());
+
+      expect(ld.label).toBe(l1);
+      expect(ld.descriptors.length).toBe(2);
+      expect(ld.descriptors[0]).toEqual(f1);
+      expect(ld.descriptors[1]).toEqual(f2);
+    });
+
+  });
+
+});

test/tests/globalApi/FaceMatcher.test.ts

@@ -0,0 +1,59 @@
+import { FaceMatcher } from '../../../src/globalApi/FaceMatcher';
+import { LabeledFaceDescriptors } from '../../../src';
+
+describe('globalApi', () => {
+
+  describe('FaceMatcher', () => {
+
+    const json = '{"distanceThreshold":123.321,"labeledDescriptors":[{"label":"foo","descriptors":[[1,2,3],[4,5,6]]},{"label":"bar","descriptors":[[7,8,9],[3,2,1]]}]}';
+    const dt = 123.321;
+    const l1 = 'foo';
+    const l2 = 'bar';
+    const f1 = new Float32Array([1, 2, 3]);
+    const f2 = new Float32Array([4, 5, 6]);
+    const f3 = new Float32Array([7, 8, 9]);
+    const f4 = new Float32Array([3, 2, 1]);
+    const lds = [
+      new LabeledFaceDescriptors(l1, [f1, f2]),
+      new LabeledFaceDescriptors(l2, [f3, f4])
+    ];
+
+    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.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('toJSON() => fromJSON()', () => {
+      const fm = FaceMatcher.fromJSON(new FaceMatcher(lds, dt).toJSON());
+
+      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);
+    });
+
+  });
+
+});