From 19efd5399aa303516dd081d1240197598a9f2d04 Mon Sep 17 00:00:00 2001
From: tobrun <tobrun.van.nuland@gmail.com>
Date: Mon, 29 Apr 2019 15:08:17 +0200
Subject: [android] - offline test, headless region download

---
 .../src/main/AndroidManifest.xml                   |  13 +-
 .../activity/offline/DownloadRegionActivity.kt     | 313 +++++++++++++++++++++
 .../src/main/res/drawable/ic_pause_black_24dp.xml  |   9 +
 .../main/res/layout/activity_region_download.xml   | 216 ++++++++++++++
 .../src/main/res/values/descriptions.xml           |   1 +
 .../src/main/res/values/titles.xml                 |   1 +
 platform/android/scripts/exclude-activity-gen.json |   3 +-
 7 files changed, 554 insertions(+), 2 deletions(-)
 create mode 100644 platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/offline/DownloadRegionActivity.kt
 create mode 100644 platform/android/MapboxGLAndroidSDKTestApp/src/main/res/drawable/ic_pause_black_24dp.xml
 create mode 100644 platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_region_download.xml

diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml
index 01f32b5406..18fbf33cc8 100644
--- a/platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml
@@ -14,6 +14,7 @@
         android:roundIcon="@drawable/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+
         <activity
             android:name=".activity.FeatureOverviewActivity"
             android:label="@string/app_name"
@@ -953,7 +954,17 @@
                 android:name="android.support.PARENT_ACTIVITY"
                 android:value=".activity.FeatureOverviewActivity" />
         </activity>
-
+        <activity
+                android:name=".activity.offline.DownloadRegionActivity"
+                android:description="@string/description_region"
+                android:label="@string/activity_region">
+            <meta-data
+                    android:name="@string/category"
+                    android:value="@string/category_offline" />
+            <meta-data
+                    android:name="android.support.PARENT_ACTIVITY"
+                    android:value=".activity.FeatureOverviewActivity" />
+        </activity>
         <!-- For Instrumentation tests -->
         <activity
             android:name=".activity.style.RuntimeStyleTimingTestActivity"
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/offline/DownloadRegionActivity.kt b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/offline/DownloadRegionActivity.kt
new file mode 100644
index 0000000000..7f90796f42
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/offline/DownloadRegionActivity.kt
@@ -0,0 +1,313 @@
+package com.mapbox.mapboxsdk.testapp.activity.offline
+
+import android.os.Bundle
+import android.os.Handler
+import android.support.v7.app.AppCompatActivity
+import android.view.View
+import android.widget.ArrayAdapter
+import android.widget.SeekBar
+import android.widget.TextView
+import android.widget.Toast
+import com.mapbox.mapboxsdk.constants.MapboxConstants
+import com.mapbox.mapboxsdk.geometry.LatLng
+import com.mapbox.mapboxsdk.geometry.LatLngBounds
+import com.mapbox.mapboxsdk.maps.Style
+import com.mapbox.mapboxsdk.offline.*
+import com.mapbox.mapboxsdk.testapp.R
+import kotlinx.android.synthetic.main.activity_region_download.*
+import timber.log.Timber
+import java.util.*
+import java.util.concurrent.TimeUnit
+
+/**
+ * Example showcasing how to download an offline region headless, allows to test pausing and resuming the download.
+ */
+class DownloadRegionActivity : AppCompatActivity(), OfflineRegion.OfflineRegionObserver {
+
+  companion object {
+    const val STATUS_UPDATE_TIMEOUT_MS = 10_000L
+  }
+
+  private val handler: Handler = Handler()
+  private lateinit var offlineManager: OfflineManager
+  private var offlineRegion: OfflineRegion? = null
+  private var downloading = false
+  private var previousCompletedResourceCount: Long = 0
+  private var previousUpdateTimestamp: Long = 0
+
+  override fun onCreate(savedInstanceState: Bundle?) {
+    super.onCreate(savedInstanceState)
+    setContentView(R.layout.activity_region_download)
+
+    offlineManager = OfflineManager.getInstance(this)
+    offlineManager.setOfflineMapboxTileCountLimit(Long.MAX_VALUE)
+    initUi()
+
+    deleteOldOfflineRegions {
+      container.visibility = View.VISIBLE
+      fab.visibility = View.VISIBLE
+    }
+  }
+
+  override fun onDestroy() {
+    handler.removeCallbacksAndMessages(null)
+    offlineRegion?.setObserver(null)
+    super.onDestroy()
+  }
+
+  private fun createOfflineRegion() {
+    val latitudeNorth = editTextLatNorth.text.toString().toDouble()
+    val longitudeEast = editTextLonEast.text.toString().toDouble()
+    val latitudeSouth = editTextLatSouth.text.toString().toDouble()
+    val longitudeWest = editTextLonWest.text.toString().toDouble()
+    val styleUrl = spinnerStyleUrl.selectedItem as String
+    val maxZoom = seekbarMaxZoom.progress.toFloat()
+    val minZoom = seekbarMinZoom.progress.toFloat()
+
+    if (!validCoordinates(latitudeNorth, longitudeEast, latitudeSouth, longitudeWest)) {
+      Toast.makeText(this, "coordinates need to be in valid range", Toast.LENGTH_LONG).show()
+      return
+    }
+
+    // create offline definition from data
+    val definition = OfflineTilePyramidRegionDefinition(
+      styleUrl,
+      LatLngBounds.Builder()
+        .include(LatLng(latitudeNorth, longitudeEast))
+        .include(LatLng(latitudeSouth, longitudeWest))
+        .build(),
+      minZoom.toDouble(),
+      maxZoom.toDouble(),
+      resources.displayMetrics.density
+    )
+
+    logMessage("Creating offline region")
+    offlineManager.createOfflineRegion(definition, byteArrayOf(), object : OfflineManager.CreateOfflineRegionCallback {
+      override fun onCreate(region: OfflineRegion) {
+        logMessage("Region with id ${region.id} created")
+        offlineRegion = region
+        startDownload(region)
+        fab.visibility = View.VISIBLE
+      }
+
+      override fun onError(error: String) {
+        logMessage("Failed to create offline region: $error")
+      }
+    })
+  }
+
+  private fun startDownload(region: OfflineRegion) {
+    downloading = true
+    fab.setImageResource(R.drawable.ic_pause_black_24dp)
+    logMessage("Downloading...")
+
+    region.setObserver(this)
+    region.setDownloadState(OfflineRegion.STATE_ACTIVE)
+
+    previousUpdateTimestamp = System.currentTimeMillis()
+    handler.postDelayed(object : Runnable {
+      override fun run() {
+        if (System.currentTimeMillis() > previousUpdateTimestamp + STATUS_UPDATE_TIMEOUT_MS) {
+          logMessage("FAILURE! No progress in ${TimeUnit.MILLISECONDS.toSeconds(STATUS_UPDATE_TIMEOUT_MS)} seconds")
+        } else {
+          handler.postDelayed(this, 1000)
+        }
+      }
+    }, 1000)
+  }
+
+  private fun pauseDownload(region: OfflineRegion) {
+    downloading = false
+    fab.setImageResource(R.drawable.ic_play_arrow_black_24dp)
+    handler.removeCallbacksAndMessages(null)
+    region.setDownloadState(OfflineRegion.STATE_INACTIVE)
+    "Paused".let {
+      logMessage(it)
+      download_status.text = it
+    }
+  }
+
+  override fun onStatusChanged(status: OfflineRegionStatus) {
+    if (status.isComplete) {
+      val statusText = "Completed"
+      logMessage("SUCCESS! $statusText")
+      download_status.text = statusText
+      offlineRegion?.setObserver(null)
+      handler.removeCallbacksAndMessages(null)
+    } else {
+      val statusText = "Downloaded ${status.completedResourceCount}/${status.requiredResourceCount}"
+      Timber.d(statusText)
+      download_status.text = statusText
+
+      if (status.completedResourceCount > status.requiredResourceCount &&
+        previousCompletedResourceCount <= status.requiredResourceCount) {
+        logMessage("FAILURE! Completed > required")
+      }
+    }
+
+    previousCompletedResourceCount = status.completedResourceCount
+    previousUpdateTimestamp = System.currentTimeMillis()
+  }
+
+  override fun onError(error: OfflineRegionError) {
+    logMessage("Error: $error")
+  }
+
+  override fun mapboxTileCountLimitExceeded(limit: Long) {
+    logMessage("Error: tile count limit exceeded")
+  }
+
+  protected fun logMessage(message: String) {
+    Timber.d(message)
+    logView.append(message)
+    logView.append("\n")
+  }
+
+  fun deleteOldOfflineRegions(onCompleted: () -> Unit) {
+    offlineManager.listOfflineRegions(object : OfflineManager.ListOfflineRegionsCallback {
+      override fun onList(offlineRegions: Array<out OfflineRegion>) {
+        val count = offlineRegions.size
+        var remainingCount = count
+        if (count > 0) {
+          logMessage("Deleting $count old region...")
+          offlineRegions.forEach {
+            it.delete(object : OfflineRegion.OfflineRegionDeleteCallback {
+              override fun onDelete() {
+                Timber.d("Deleted region with id ${it.id}")
+                onProcessed()
+              }
+
+              override fun onError(error: String) {
+                Timber.e("Failed to delete region: $error")
+                onProcessed()
+              }
+
+              private fun onProcessed() {
+                remainingCount--
+                if (remainingCount == 0) {
+                  logMessage("Done deleting")
+                  onCompleted()
+                }
+              }
+            })
+          }
+        } else {
+          onCompleted()
+        }
+      }
+
+      override fun onError(error: String) {
+        logMessage("Failed to list offline regions: $error")
+        onCompleted()
+      }
+    })
+  }
+
+  // ui
+
+  private val logView: TextView by lazy {
+    findViewById<TextView>(R.id.log_text)
+  }
+
+  private fun initUi() {
+    initEditTexts()
+    initSeekbars()
+    initSpinner()
+    initZoomLevelTextviews()
+    initSeekbarListeners()
+    initFab()
+  }
+
+  private fun initEditTexts() {
+    editTextLatNorth.setText("62.0")
+    editTextLonEast.setText("24.0")
+    editTextLatSouth.setText("60.0")
+    editTextLonWest.setText("22.5")
+  }
+
+  private fun initSeekbars() {
+    val maxZoom = MapboxConstants.MAXIMUM_ZOOM.toInt()
+    seekbarMinZoom.max = maxZoom
+    seekbarMinZoom.progress = 1
+    seekbarMaxZoom.max = maxZoom
+    seekbarMaxZoom.progress = 15
+  }
+
+  private fun initSpinner() {
+    val styles = ArrayList<String>()
+    styles.add(Style.MAPBOX_STREETS)
+    styles.add(Style.DARK)
+    styles.add(Style.LIGHT)
+    styles.add(Style.OUTDOORS)
+    val spinnerArrayAdapter = ArrayAdapter(this, android.R.layout.simple_spinner_item, styles)
+    spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
+    spinnerStyleUrl.adapter = spinnerArrayAdapter
+  }
+
+  private fun initZoomLevelTextviews() {
+    textViewMaxText.text = String.format("Max zoom: %s", seekbarMaxZoom.progress)
+    textViewMinText.text = String.format("Min zoom: %s", seekbarMinZoom.progress)
+  }
+
+  private fun initFab() {
+    fab.setOnClickListener {
+      container.visibility = View.GONE
+      if (offlineRegion == null) {
+        fab.visibility = View.GONE
+        createOfflineRegion()
+      } else {
+        offlineRegion?.let {
+          if (downloading) {
+            pauseDownload(it)
+          } else {
+            startDownload(it)
+          }
+        }
+      }
+    }
+  }
+
+  private fun initSeekbarListeners() {
+    seekbarMaxZoom.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
+      override fun onProgressChanged(seekBar: SeekBar, progress: Int, fromUser: Boolean) {
+        textViewMaxText.text = String.format("Max zoom: %s", progress)
+      }
+
+      override fun onStartTrackingTouch(seekBar: SeekBar) {
+
+      }
+
+      override fun onStopTrackingTouch(seekBar: SeekBar) {
+
+      }
+    })
+
+    seekbarMinZoom.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
+      override fun onProgressChanged(seekBar: SeekBar, progress: Int, fromUser: Boolean) {
+        textViewMinText.text = String.format("Min zoom: %s", progress)
+      }
+
+      override fun onStartTrackingTouch(seekBar: SeekBar) {
+
+      }
+
+      override fun onStopTrackingTouch(seekBar: SeekBar) {
+
+      }
+    })
+  }
+
+  private fun validCoordinates(latitudeNorth: Double, longitudeEast: Double, latitudeSouth: Double,
+                               longitudeWest: Double): Boolean {
+    if (latitudeNorth < -90 || latitudeNorth > 90) {
+      return false
+    } else if (longitudeEast < -180 || longitudeEast > 180) {
+      return false
+    } else if (latitudeSouth < -90 || latitudeSouth > 90) {
+      return false
+    } else if (longitudeWest < -180 || longitudeWest > 180) {
+      return false
+    }
+    return true
+  }
+}
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/drawable/ic_pause_black_24dp.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/drawable/ic_pause_black_24dp.xml
new file mode 100644
index 0000000000..bb28a6c415
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/drawable/ic_pause_black_24dp.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M6,19h4L10,5L6,5v14zM14,5v14h4L18,5h-4z"/>
+</vector>
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_region_download.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_region_download.xml
new file mode 100644
index 0000000000..4242da9fbd
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_region_download.xml
@@ -0,0 +1,216 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res-auto"
+        xmlns:tools="http://schemas.android.com/tools"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+    <android.support.v4.widget.NestedScrollView
+            android:id="@+id/container"
+            android:visibility="gone"
+            android:layout_width="match_parent"
+            android:layout_marginTop="8dp"
+            android:layout_height="match_parent">
+
+        <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:orientation="vertical"
+                android:padding="16dp">
+
+            <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginBottom="8dp"
+                    android:orientation="horizontal"
+                    android:weightSum="2">
+
+                <LinearLayout
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:orientation="vertical">
+
+                    <TextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:layout_marginBottom="4dp"
+                            android:text="Latitude north:"/>
+
+                    <EditText
+                            android:id="@+id/editTextLatNorth"
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:ellipsize="end"
+                            android:inputType="numberDecimal"
+                            android:maxLines="1"/>
+
+                </LinearLayout>
+
+                <LinearLayout
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:orientation="vertical">
+
+                    <TextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:layout_marginBottom="4dp"
+                            android:text="Longitude east:"/>
+
+                    <EditText
+                            android:id="@+id/editTextLonEast"
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:ellipsize="end"
+                            android:inputType="numberDecimal"
+                            android:maxLines="1"/>
+
+                </LinearLayout>
+
+            </LinearLayout>
+
+            <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginBottom="8dp"
+                    android:orientation="horizontal"
+                    android:weightSum="2">
+
+                <LinearLayout
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:orientation="vertical"
+                        android:paddingRight="2dp">
+
+                    <TextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:layout_marginBottom="4dp"
+                            android:text="Latitude south:"/>
+
+                    <EditText
+                            android:id="@+id/editTextLatSouth"
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:ellipsize="end"
+                            android:inputType="numberDecimal"
+                            android:maxLines="1"/>
+
+                </LinearLayout>
+
+                <LinearLayout
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:orientation="vertical"
+                        android:paddingLeft="2dp">
+
+                    <TextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:layout_marginBottom="4dp"
+                            android:text="Longitude west:"/>
+
+                    <EditText
+                            android:id="@+id/editTextLonWest"
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:ellipsize="end"
+                            android:inputType="numberDecimal"
+                            android:maxLines="1"/>
+
+                </LinearLayout>
+
+            </LinearLayout>
+
+            <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginBottom="4dp"
+                    android:text="Style url:"/>
+
+            <Spinner
+                    android:id="@+id/spinnerStyleUrl"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginBottom="8dp"/>
+
+            <TextView
+                    android:id="@+id/textViewMinText"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginBottom="4dp"/>
+
+            <SeekBar
+                    android:id="@+id/seekbarMinZoom"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginBottom="12dp"/>
+
+            <TextView
+                    android:id="@+id/textViewMaxText"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginBottom="4dp"/>
+
+            <SeekBar
+                    android:id="@+id/seekbarMaxZoom"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginBottom="12dp"/>
+
+        </LinearLayout>
+
+    </android.support.v4.widget.NestedScrollView>
+
+    <FrameLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
+        <TextView
+                android:id="@+id/log_text"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:textSize="8sp"
+                tools:text="Log text container"/>
+
+    </FrameLayout>
+
+    <FrameLayout android:layout_width="match_parent" android:layout_height="64dp"
+                 app:layout_constraintStart_toStartOf="parent"
+                 app:layout_constraintEnd_toEndOf="parent"
+                 android:background="@color/primary"
+                 android:id="@+id/bottom"
+                 app:layout_constraintBottom_toBottomOf="parent">
+        <TextView
+                android:id="@+id/download_status"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:gravity="center"
+                android:text="Not downloading"
+                android:textColor="@color/white"
+                android:textSize="16sp"/>
+
+    </FrameLayout>
+
+    <android.support.design.widget.FloatingActionButton
+            android:id="@+id/fab"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_margin="16dp"
+            android:visibility="gone"
+            app:layout_constraintEnd_toEndOf="@id/bottom"
+            android:background="@color/primary"
+            app:layout_constraintBottom_toBottomOf="@id/bottom"
+            app:layout_constraintBottom_toTopOf="@id/bottom"
+            android:src="@drawable/ic_play_arrow_black_24dp"
+            android:tint="@android:color/white"
+            android:layout_marginBottom="64dp"
+            app:backgroundTint="@color/primary"/>
+
+
+</android.support.constraint.ConstraintLayout>
\ No newline at end of file
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/descriptions.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/descriptions.xml
index cc2577fb5e..be8dae57a0 100644
--- a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/descriptions.xml
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/descriptions.xml
@@ -18,6 +18,7 @@
     <string name="description_map_padding">Map Padding example</string>
     <string name="description_debug_mode">Debug Mode</string>
     <string name="description_offline">Offline Map example</string>
+    <string name="description_region">Download an offline region.</string>
     <string name="description_update_metadata">Update metadata example</string>
     <string name="description_offline_region_delete">Delete region example</string>
     <string name="description_change_resources_cache_path">Change resources cache path example</string>
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/titles.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/titles.xml
index e5f7381918..027198c71b 100644
--- a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/titles.xml
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/titles.xml
@@ -83,4 +83,5 @@
     <string name="activity_nested_viewpager">Nested ViewPager</string>
     <string name="activity_performance_measurement">Performance Measurement</string>
     <string name="activity_physical_circle">Physical Unit Circle</string>
+    <string name="activity_region">Download region</string>
 </resources>
\ No newline at end of file
diff --git a/platform/android/scripts/exclude-activity-gen.json b/platform/android/scripts/exclude-activity-gen.json
index a6070edccf..f6156eb0ea 100644
--- a/platform/android/scripts/exclude-activity-gen.json
+++ b/platform/android/scripts/exclude-activity-gen.json
@@ -50,5 +50,6 @@
   "EspressoTestActivity",
   "FragmentBackStackActivity",
   "ChildFragmentMapInDialogActivity",
-  "PerformanceMeasurementActivity"
+  "PerformanceMeasurementActivity",
+  "DownloadRegionActivity"
 ]
-- 
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