fix #1224 email reply to whom

app/mailers/email_reply.rb

@@ -5,6 +5,13 @@ class EmailReply < ApplicationMailer
     @comment = comment
     @user = user
 
+    @replied_to = "you"
+    if @comment.parent_comment.nil?
+      @replied_to = "your story"
+    elsif @comment.parent_comment.user != @user
+      @replied_to = @comment.parent_comment.user.username
+    end
+
     mail(
       to: user.email,
       subject: "[#{Rails.application.name}] Reply from " \

app/views/email_reply/reply.text.erb

@@ -1,4 +1,4 @@
-<%= @comment.user.username %> has replied to you:
+<%= @comment.user.username %> has replied to <%= @replied_to %>:
 
   <%= word_wrap(@comment.plaintext_comment, :line_width => 72).gsub(/\n/, "\n  ") %>
 

spec/mailers/email_reply_spec.rb

@@ -0,0 +1,31 @@
+# typed: false
+
+require "rails_helper"
+
+RSpec.describe EmailReply, type: :mailer do
+  it "addresses replies to receiver" do
+    comment = create(:comment)
+    user = comment.user
+    reply = create(:comment, parent_comment: comment)
+
+    email = EmailReply.reply(reply, user)
+    expect(email.body.encoded).to match("replied to you")
+  end
+
+  it "addresses top-level story responses" do
+    user = create(:story).user
+    comment = create(:comment)
+
+    email = EmailReply.reply(comment, user)
+    expect(email.body.encoded).to match("replied to your story")
+  end
+
+  it "addresses story replies" do
+    user = create(:story).user
+    comment = create(:comment, user: create(:user, username: "alice"))
+    reply = create(:comment, parent_comment: comment)
+
+    email = EmailReply.reply(reply, user)
+    expect(email.body.encoded).to match("replied to alice")
+  end
+end

spec/mailers/previews/email_reply_preview.rb

@@ -0,0 +1,4 @@
+# Preview all emails at http://localhost:3000/rails/mailers/email_reply
+class EmailReplyPreview < ActionMailer::Preview
+
+end