feat: Add sharing ticket feature (#1702)

Detail:
- Create a bitmap from container view of single ticket
- Turn bitmap into an URL and then share it to another app

Fixes: #1699

Author: anhanh11001

app/src/main/java/org/fossasia/openevent/general/order/OrderDetailsFragment.kt

@@ -1,20 +1,30 @@
 package org.fossasia.openevent.general.order
 
+import android.content.Intent
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.net.Uri
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
+import android.view.Menu
+import android.view.MenuInflater
+import androidx.core.content.FileProvider
 import androidx.core.view.isVisible
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.Observer
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.navigation.Navigation.findNavController
 import androidx.navigation.fragment.navArgs
 import androidx.recyclerview.widget.LinearSnapHelper
+import androidx.recyclerview.widget.RecyclerView
 import kotlinx.android.synthetic.main.fragment_order_details.view.orderDetailCoordinatorLayout
 import kotlinx.android.synthetic.main.fragment_order_details.view.orderDetailsRecycler
 import kotlinx.android.synthetic.main.fragment_order_details.view.progressBar
+import kotlinx.android.synthetic.main.item_card_order_details.view.orderDetailCardView
+import org.fossasia.openevent.general.BuildConfig
 import org.fossasia.openevent.general.R
 import org.fossasia.openevent.general.event.EventDetailsFragmentArgs
 import org.fossasia.openevent.general.utils.Utils.getAnimFade
@@ -23,6 +33,9 @@ import org.koin.androidx.viewmodel.ext.android.viewModel
 import timber.log.Timber
 import org.fossasia.openevent.general.utils.Utils.setToolbar
 import org.jetbrains.anko.design.longSnackbar
+import org.jetbrains.anko.design.snackbar
+import java.io.File
+import java.io.FileOutputStream
 
 class OrderDetailsFragment : Fragment() {
 
@@ -69,7 +82,20 @@ class OrderDetailsFragment : Fragment() {
         linearLayoutManager = LinearLayoutManager(context)
         linearLayoutManager.orientation = LinearLayoutManager.HORIZONTAL
         rootView.orderDetailsRecycler.layoutManager = linearLayoutManager
-        LinearSnapHelper().attachToRecyclerView(rootView.orderDetailsRecycler)
+        val snapHelper = LinearSnapHelper()
+        snapHelper.attachToRecyclerView(rootView.orderDetailsRecycler)
+        rootView.orderDetailsRecycler.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+            override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
+                super.onScrollStateChanged(recyclerView, newState)
+                if (newState == RecyclerView.SCROLL_STATE_IDLE) {
+                    val centerView = snapHelper.findSnapView(linearLayoutManager)
+                    centerView?.let {
+                        val itemPosition = linearLayoutManager.getPosition(it)
+                        orderDetailsViewModel.currentTicketPosition = itemPosition
+                    }
+                }
+            }
+        })
 
         val eventDetailsListener = object : OrderDetailsRecyclerAdapter.EventDetailsListener {
             override fun onClick(eventID: Long) {
@@ -101,13 +127,59 @@ class OrderDetailsFragment : Fragment() {
         return rootView
     }
 
+    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
+        inflater.inflate(R.menu.order_detail, menu)
+        super.onCreateOptionsMenu(menu, inflater)
+    }
+
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         return when (item.itemId) {
             android.R.id.home -> {
                 activity?.onBackPressed()
                 true
             }
+            R.id.share_ticket -> {
+                shareCurrentTicket()
+                true
+            }
             else -> super.onOptionsItemSelected(item)
         }
     }
+
+    private fun shareCurrentTicket() {
+        val currentTicketViewHolder =
+            rootView.orderDetailsRecycler.findViewHolderForAdapterPosition(orderDetailsViewModel.currentTicketPosition)
+        if (currentTicketViewHolder != null && currentTicketViewHolder is OrderDetailsViewHolder) {
+            val bitmap = getBitmapFromView(currentTicketViewHolder.itemView.rootView.orderDetailCardView)
+            val bitmapUri = getBitmapUri(bitmap)
+            if (bitmapUri == null) {
+                rootView.snackbar(getString(R.string.fail_sharing_ticket))
+                return
+            }
+            val intent = Intent(Intent.ACTION_SEND)
+            intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
+            intent.type = "image/png"
+            intent.putExtra(Intent.EXTRA_STREAM, bitmapUri)
+            startActivity(intent)
+        } else {
+            rootView.snackbar(getString(R.string.fail_sharing_ticket))
+        }
+    }
+
+    private fun getBitmapUri(bitmap: Bitmap): Uri? {
+        val myContext = context ?: return null
+        val file = File(myContext.cacheDir, "shared_image.png")
+        return FileOutputStream(file)
+            .use { fileOutputStream ->
+                bitmap.compress(Bitmap.CompressFormat.PNG, 90, fileOutputStream)
+                FileProvider.getUriForFile(myContext, BuildConfig.APPLICATION_ID + ".provider", file)
+            }
+    }
+
+    private fun getBitmapFromView(view: View): Bitmap {
+        val bitmap = Bitmap.createBitmap(view.width, view.height, Bitmap.Config.ARGB_8888)
+        val canvas = Canvas(bitmap)
+        view.draw(canvas)
+        return bitmap
+    }
 }

app/src/main/java/org/fossasia/openevent/general/order/OrderDetailsViewModel.kt

@@ -28,6 +28,7 @@ class OrderDetailsViewModel(
     val attendees: LiveData<List<Attendee>> = mutableAttendees
     private val mutableProgress = MutableLiveData<Boolean>()
     val progress: LiveData<Boolean> = mutableProgress
+    var currentTicketPosition: Int = 0
 
     fun loadEvent(id: Long) {
         if (id.equals(-1)) {

app/src/main/res/layout-land/item_card_order_details.xml

@@ -14,6 +14,7 @@
         app:cardElevation="@dimen/card_elevation"
         android:elevation="@dimen/card_elevation"
         android:paddingBottom="@dimen/padding_extra_small"
+        android:id="@+id/orderDetailCardView"
         android:foreground="?android:attr/selectableItemBackground">
         <LinearLayout
             android:layout_width="match_parent"

app/src/main/res/layout/item_card_order_details.xml

@@ -4,6 +4,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
     <androidx.cardview.widget.CardView
+        android:id="@+id/orderDetailCardView"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_margin="@dimen/layout_margin_large"

app/src/main/res/menu/order_detail.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/share_ticket"
+        android:title="@string/share_ticket"/>
+</menu>

app/src/main/res/values/strings.xml

@@ -240,6 +240,8 @@
     <string name="order_fail_message">Unable to create Order!</string>
     <string name="payment_not_complete_message">Payment not completed!</string>
     <string name="error_fetching_attendee_details_message">Error fetching attendee details</string>
+    <string name="share_ticket">Share Ticket</string>
+    <string name="fail_sharing_ticket">Fail to share ticket</string>
 
     <!--snackbar messages-->
     <string name="logged_in_automatically">Logged in Automatically!</string>