Bug 1863603 - Add handling of Meta attribution in percent format

app/src/main/java/org/mozilla/fenix/components/metrics/InstallReferrerMetricsService.kt

@@ -16,6 +16,8 @@ import org.mozilla.fenix.GleanMetrics.MetaAttribution
 import org.mozilla.fenix.GleanMetrics.PlayStoreAttribution
 import org.mozilla.fenix.ext.settings
 import org.mozilla.fenix.utils.Settings
+import java.io.UnsupportedEncodingException
+import java.net.URLDecoder
 
 /**
  * A metrics service used to derive the UTM parameters with the Google Play Install Referrer library.
@@ -249,12 +251,20 @@ data class MetaParams(
             if (contentString == null) {
                 return null
             }
+            val decodedContentString = try {
+                // content string can be in percent format
+                URLDecoder.decode(contentString, "UTF-8")
+            } catch (e: UnsupportedEncodingException) {
+                logger.error("failed to decode content string", e)
+                // can't recover from this
+                return null
+            }
 
             val data: String
             val nonce: String
 
             val contentJson = try {
-                JSONObject(contentString)
+                JSONObject(decodedContentString)
             } catch (e: JSONException) {
                 logger.error("content is not JSON", e)
                 // can't recover from this

app/src/test/java/org/mozilla/fenix/components/metrics/InstallReferrerMetricsServiceTest.kt

@@ -127,6 +127,21 @@ internal class InstallReferrerMetricsServiceTest {
         assertEquals(metaParams, expectedMetaParams)
     }
 
+    @Test
+    fun `WHEN receiving a Meta encrypted attribution in percent format THEN will decrypt correctly`() {
+        val metaParams = MetaParams.extractMetaAttribution("%7B%22app%22%3A12345%2C%22t%22%3A1234567890%2C%22source%22%3A%7B%22data%22%3A%22DATA%22%2C%22nonce%22%3A%22NONCE%22%7D%7D")
+        val expectedMetaParams = MetaParams("12345", "1234567890", "DATA", "NONCE")
+
+        assertEquals(metaParams, expectedMetaParams)
+    }
+
+    @Test
+    fun `WHEN receiving a Meta encrypted attribution in bad format THEN it should not crash`() {
+        val metaParams = MetaParams.extractMetaAttribution("%7B%22app%22%3A12345%2C%22t%22%3A1234567890%2C%22source%22%3A%7B%22data%22%3A%22DATA%22%2C%22nonce%22%3A%22NONCE%22%7B%7D")
+
+        assertNull(metaParams)
+    }
+
     @Test
     fun `WHEN parsing referrer response with meta attribution THEN both UTM and Meta params should match expected`() {
         val utmParams = UTMParams.parseUTMParameters("""utm_content={"app":12345, "t":1234567890,"source":{"data":"DATA","nonce":"NONCE"}}""")