✨ Add EXIF service

src/app/exif.service.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { ExifService } from './exif.service';
+
+describe('ExifService', () => {
+  let service: ExifService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(ExifService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

src/app/exif.service.ts

@@ -0,0 +1,87 @@
+import { Injectable } from '@angular/core';
+import exifr from 'exifr';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ExifService {
+
+  private getExifData(file: File): Promise<any> {
+    // console.log('getExifData(file)');
+    // return new Promise((resolve, reject) => {
+    //   console.log('getExifData(file) -> Promise');
+    //   const reader = new FileReader();
+    //   console.log('getExifData(file) -> Promise -> reader');
+    //   reader.onload = (event: any) => {
+    //     console.log('getExifData(file) -> Promise -> reader -> onload');
+    //     EXIF.getData(event.target.result, function() {
+    //       console.log('getExifData(file) -> Promise -> reader -> onload -> EXIF.getData');
+    //       const allExifData = EXIF.getAllTags(this);
+    //       console.log('getExifData(file) -> Promise -> reader -> onload -> EXIF.getData -> getAllTags');
+    //       resolve(allExifData);
+    //     });
+    //   };
+    //   reader.onerror = (error) => reject(error);
+    //   reader.readAsArrayBuffer(file);
+    // });
+    return exifr.parse(file);
+  }
+
+  async getAllExifData(file: File): Promise<any> {
+    try {
+      return await this.getExifData(file);
+    } catch (error) {
+      console.error('Error reading EXIF data:', error);
+      return
+    }
+  }
+
+  async getOrientation(file: File): Promise<number | undefined> {
+    try {
+      const exifData = await this.getExifData(file);
+      return exifData.Orientation;
+    } catch (error) {
+      console.error('Error reading EXIF data:', error);
+      return undefined;
+    }
+  }
+
+  async getDeviceModel(file: File): Promise<string | undefined> {
+    try {
+      const exifData = await this.getExifData(file);
+      return exifData.Model;
+    } catch (error) {
+      console.error('Error reading EXIF data:', error);
+      return undefined;
+    }
+  }
+
+  async getLocation(file: File): Promise<{ latitude?: number; longitude?: number }> {
+    try {
+      const exifData = await this.getExifData(file);
+      return {
+        latitude: exifData.GPSLatitude ? this.convertToDecimal(exifData.GPSLatitude, exifData.GPSLatitudeRef) : undefined,
+        longitude: exifData.GPSLongitude ? this.convertToDecimal(exifData.GPSLongitude, exifData.GPSLongitudeRef) : undefined
+      };
+    } catch (error) {
+      console.error('Error reading EXIF data:', error);
+      return {};
+    }
+  }
+
+  async getDateTime(file: File): Promise<string | boolean> {
+    try {
+      const exifData = await this.getExifData(file);
+      return exifData.DateTime;
+    } catch (error) {
+      console.error('Error reading EXIF data:', error);
+      return false;
+    }
+  }
+
+  private convertToDecimal(coordinate: number[], direction: string): number {
+    if (!coordinate || coordinate.length !== 3) return NaN;
+    const decimal = coordinate[0] + coordinate[1] / 60 + coordinate[2] / 3600;
+    return (direction === 'S' || direction === 'W') ? -decimal : decimal;
+  }
+}