Implement UI and backend for sending story reactions.

Co-authored-by: Rashad Sookram <rashad@signal.org>

app/src/main/java/org/thoughtcrime/securesms/util/FragmentDialogs.kt

@@ -0,0 +1,72 @@
+package org.thoughtcrime.securesms.util
+
+import android.content.DialogInterface
+import android.graphics.Color
+import android.graphics.drawable.ColorDrawable
+import android.view.Gravity
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.annotation.LayoutRes
+import androidx.appcompat.app.AlertDialog
+import androidx.fragment.app.Fragment
+import org.thoughtcrime.securesms.stories.viewer.text.StoryTextPostPreviewFragment
+import org.thoughtcrime.securesms.util.fragments.requireListener
+
+/**
+ * Helper functions to display custom views in AlertDialogs anchored to the top of the specified view.
+ */
+object FragmentDialogs {
+
+  fun Fragment.displayInDialogAboveAnchor(
+    anchorView: View,
+    @LayoutRes contentLayoutId: Int,
+    windowDim: Float = -1f,
+    onShow: (DialogInterface, View) -> Unit = { _, _ -> }
+  ): DialogInterface {
+    val contentView = LayoutInflater.from(anchorView.context).inflate(contentLayoutId, requireView() as ViewGroup, false)
+
+    contentView.measure(
+      View.MeasureSpec.makeMeasureSpec(contentView.layoutParams.width, View.MeasureSpec.EXACTLY),
+      View.MeasureSpec.makeMeasureSpec(contentView.layoutParams.height, View.MeasureSpec.EXACTLY)
+    )
+
+    contentView.layout(0, 0, contentView.measuredWidth, contentView.measuredHeight)
+
+    return displayInDialogAboveAnchor(anchorView, contentView, windowDim, onShow)
+  }
+
+  fun Fragment.displayInDialogAboveAnchor(
+    anchorView: View,
+    contentView: View,
+    windowDim: Float = -1f,
+    onShow: (DialogInterface, View) -> Unit = { _, _ -> }
+  ): DialogInterface {
+    val alertDialog = AlertDialog.Builder(requireContext())
+      .setView(contentView)
+      .create()
+
+    alertDialog.window!!.attributes = alertDialog.window!!.attributes.apply {
+      val viewProjection = Projection.relativeToViewRoot(anchorView, null).translateY(anchorView.translationY)
+      this.y = (viewProjection.y - contentView.height).toInt()
+      this.gravity = Gravity.TOP
+
+      viewProjection.release()
+    }
+
+    if (windowDim >= 0f) {
+      alertDialog.window!!.setDimAmount(windowDim)
+    }
+
+    alertDialog.window!!.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))
+    alertDialog.setOnDismissListener {
+      requireListener<StoryTextPostPreviewFragment.Callback>().setIsDisplayingLinkPreviewTooltip(false)
+    }
+
+    alertDialog.setOnShowListener { onShow(alertDialog, contentView) }
+
+    alertDialog.show()
+
+    return alertDialog
+  }
+}

app/src/main/java/org/thoughtcrime/securesms/util/MessageRecordUtil.kt

@@ -4,6 +4,7 @@ package org.thoughtcrime.securesms.util
 
 import android.content.Context
 import org.thoughtcrime.securesms.R
+import org.thoughtcrime.securesms.database.MmsSmsColumns
 import org.thoughtcrime.securesms.database.model.MediaMmsMessageRecord
 import org.thoughtcrime.securesms.database.model.MessageRecord
 import org.thoughtcrime.securesms.database.model.MmsMessageRecord
@@ -36,6 +37,9 @@ fun MessageRecord.isCaptionlessMms(context: Context): Boolean =
 fun MessageRecord.hasThumbnail(): Boolean =
   isMms && (this as MmsMessageRecord).slideDeck.thumbnailSlide != null
 
+fun MessageRecord.isStoryReaction(): Boolean =
+  isMms && MmsSmsColumns.Types.isStoryReaction((this as MmsMessageRecord).type)
+
 fun MessageRecord.isBorderless(context: Context): Boolean {
   return isCaptionlessMms(context) &&
     hasThumbnail() &&