enable multiple features in analytic tokens

__TESTS__/unit/analytics/analytics.node.test.ts

@@ -94,6 +94,24 @@ describe('Add analytics to a regular URL', () => {
     })).toContain('?_a=AZAlhAMB');
   });
 
+  it('Test lazyload, responsive & placeholder combined feature value', () => {
+    const cldImage = createNewImageWithAnalytics('sample');
+    // AZ -> Algo A, SDK Code is Z
+    // Alh -> 1.24.0 from package.json
+    // AM -> 12.0.0 Underlying tech
+    // CAB -> lazyload, responsive & placeholder
+    expect(cldImage.toURL({
+      trackedAnalytics: {
+        sdkCode: 'Z',
+        sdkSemver: '1.24.0',
+        techVersion: '12.0.0',
+        placeholder: true,
+        lazyload: true,
+        responsive: true,
+      }
+    })).toContain('?_a=AZAlhAMCAB');
+  });
+
   it('Can be turned off', () => {
     const cldImage = createNewImageWithAnalytics('sample', {}, {
       analytics: false

src/sdkAnalytics/getAnalyticsOptions.ts

@@ -12,23 +12,28 @@ export function getAnalyticsOptions(options: ITrackedPropertiesThroughAnalytics)
     sdkSemver: options.sdkSemver,
     techVersion: options.techVersion,
     sdkCode: options.sdkCode,
-    feature: '0'
+    features: '0'
   };
 
+  let features = '';
   if (options.accessibility) {
-    analyticsOptions.feature = 'D';
+    features += 'D';
   }
 
   if (options.lazyload) {
-    analyticsOptions.feature = 'C';
+    features += 'C';
   }
 
   if (options.responsive) {
-    analyticsOptions.feature = 'A';
+    features += 'A';
   }
 
   if (options.placeholder) {
-    analyticsOptions.feature = 'B';
+    features += 'B';
+  }
+
+  if (features) {
+    analyticsOptions.features = features;
   }
 
   return analyticsOptions;

src/sdkAnalytics/getSDKAnalyticsSignature.ts

@@ -69,12 +69,12 @@ export function getSDKAnalyticsSignature(_trackedAnalytics?: Partial<ITrackedPro
     const encodedSDKVersion = encodeVersion(analyticsOptions.sdkSemver);
     const encodedTechVersion = encodeVersion(twoPartVersion);
 
-    const featureCode = analyticsOptions.feature;
+    const featuresCode = analyticsOptions.features;
     const SDKCode = analyticsOptions.sdkCode;
     const algoVersion = 'A'; // The algo version is determined here, it should not be an argument
 
 
-    return `${algoVersion}${SDKCode}${encodedSDKVersion}${encodedTechVersion}${featureCode}`;
+    return `${algoVersion}${SDKCode}${encodedSDKVersion}${encodedTechVersion}${featuresCode}`;
   } catch (e) {
     // Either SDK or Node versions were unparsable
     return 'E';

src/sdkAnalytics/interfaces/IAnalyticsOptions.ts

@@ -5,5 +5,5 @@ export interface IAnalyticsOptions {
   sdkSemver: string,
   techVersion: string,
   sdkCode: string,
-  feature: string
+  features: string
 }