EN: Display last exposure report in settings

play-services-core/src/main/kotlin/org/microg/gms/ui/ExposureNotificationsAppPreferencesFragment.kt

@@ -8,10 +8,13 @@ package org.microg.gms.ui
 import android.content.Intent
 import android.os.Bundle
 import android.text.format.DateUtils
+import android.util.JsonReader
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import com.google.android.gms.R
+import org.json.JSONObject
 import org.microg.gms.nearby.exposurenotification.ExposureDatabase
+import java.util.concurrent.TimeUnit
 
 class ExposureNotificationsAppPreferencesFragment : PreferenceFragmentCompat() {
     private lateinit var open: Preference
@@ -53,6 +56,19 @@ class ExposureNotificationsAppPreferencesFragment : PreferenceFragmentCompat() {
                 if (lastCheckTime != null && lastCheckTime != 0L) {
                     str += "\n" + getString(R.string.pref_exposure_app_last_check_summary, DateUtils.getRelativeDateTimeString(context, lastCheckTime, DateUtils.MINUTE_IN_MILLIS, DateUtils.WEEK_IN_MILLIS, DateUtils.FORMAT_SHOW_TIME))
                 }
+                val lastExposureSummaryTime = database.lastMethodCall(packageName, "getExposureSummary")
+                val lastExposureSummary = database.lastMethodCallArgs(packageName, "getExposureSummary")
+                if (lastExposureSummaryTime != null && lastExposureSummary != null && System.currentTimeMillis() - lastExposureSummaryTime <= TimeUnit.DAYS.toMillis(1)) {
+                    try {
+                        val json = JSONObject(lastExposureSummary)
+                        val matchedKeys = json.optInt("response_matched_keys")
+                        val daysSince = json.optInt("response_days_since", -1)
+                        if (matchedKeys > 0 && daysSince >= 0) {
+                            str += "\n" + resources.getQuantityString(R.plurals.pref_exposure_app_last_report_summary, matchedKeys, matchedKeys, daysSince)
+                        }
+                    } catch (ignored: Exception) {
+                    }
+                }
                 checks.summary = str
             }
         }

play-services-core/src/main/res/values/plurals.xml

@@ -32,4 +32,8 @@
         <item quantity="one">Request missing permission</item>
         <item quantity="other">Request missing permissions</item>
     </plurals>
-</resources>
+    <plurals name="pref_exposure_app_last_report_summary">
+        <item quantity="one">Last report: <xliff:g example="1">%1$d</xliff:g> match, <xliff:g example="3">%2$d</xliff:g> days ago</item>
+        <item quantity="other">Last report: <xliff:g example="2">%1$d</xliff:g> matches, latest <xliff:g example="3">%2$d</xliff:g> days ago</item>
+    </plurals>
+</resources>

play-services-core/src/main/res/xml/preferences_exposure_notifications_app.xml

@@ -16,6 +16,6 @@
         <Preference
             android:key="pref_exposure_app_checks"
             android:selectable="false"
-            tools:summary="7 checks in past 14 days\nLast check: 3 hours ago" />
+            tools:summary="7 checks in past 14 days\nLast check: 3 hours ago\nLast report: 2 matches, latest 3 days ago" />
     </PreferenceCategory>
 </PreferenceScreen>

play-services-nearby-core/src/main/kotlin/org/microg/gms/nearby/exposurenotification/ExposureDatabase.kt

@@ -444,6 +444,16 @@ class ExposureDatabase private constructor(private val context: Context) : SQLit
         }
     }
 
+    fun lastMethodCallArgs(packageName: String, method: String): String? = readableDatabase.run {
+        query(TABLE_APP_LOG, arrayOf("args"), "package = ? AND method = ?", arrayOf(packageName, method), null, null, "timestamp DESC", "1").use { cursor ->
+            if (cursor.moveToNext()) {
+                cursor.getString(0)
+            } else {
+                null
+            }
+        }
+    }
+
     private val currentTemporaryExposureKey: TemporaryExposureKey
         get() = findOwnKeyAt(currentRollingStartNumber.toInt())
                 ?: storeOwnKey(generateCurrentTemporaryExposureKey())

play-services-nearby-core/src/main/kotlin/org/microg/gms/nearby/exposurenotification/ExposureNotificationServiceImpl.kt

@@ -72,24 +72,14 @@ class ExposureNotificationServiceImpl(private val context: Context, private val
     }
 
     override fun stop(params: StopParams) {
-        if (!ExposurePreferences(context).enabled) {
-            params.callback.onResult(Status.SUCCESS)
-            return
+        ExposurePreferences(context).enabled = false
+        ExposureDatabase.with(context) { database ->
+            database.noteAppAction(packageName, "stop")
         }
-        confirm(CONFIRM_ACTION_STOP) { resultCode, _ ->
-            if (resultCode == SUCCESS) {
-                ExposurePreferences(context).enabled = false
-            }
-            ExposureDatabase.with(context) { database ->
-                database.noteAppAction(packageName, "stop", JSONObject().apply {
-                    put("result", resultCode)
-                }.toString())
-            }
-            try {
-                params.callback.onResult(Status.SUCCESS)
-            } catch (e: Exception) {
-                Log.w(TAG, "Callback failed", e)
-            }
+        try {
+            params.callback.onResult(Status.SUCCESS)
+        } catch (e: Exception) {
+            Log.w(TAG, "Callback failed", e)
         }
     }
 

play-services-nearby-core/src/main/kotlin/org/microg/gms/nearby/exposurenotification/MeasuredExposure.kt

@@ -55,7 +55,7 @@ data class MergedExposure internal constructor(val key: TemporaryExposureKey, va
         get() = TimeUnit.MILLISECONDS.toDays(System.currentTimeMillis() - timestamp)
 
     val attenuation
-        get() = subs.map { it.attenuation }.min()!!
+        get() = (subs.map { it.attenuation * it.duration }.sum().toDouble() / subs.map { it.duration }.sum().toDouble()).toInt()
 
     fun getAttenuationRiskScore(configuration: ExposureConfiguration): Int {
         return when {