From 8ddf7ee716244d78f80fe100460ee33ec59490a2 Mon Sep 17 00:00:00 2001
From: evazion <noizave@gmail.com>
Date: Sun, 12 Jan 2020 19:04:53 -0600
Subject: [PATCH] wiki pages: drop unused wiki page presenter.

---
 app/models/wiki_page.rb               |  4 --
 app/presenters/wiki_page_presenter.rb | 58 ---------------------------
 2 files changed, 62 deletions(-)
 delete mode 100644 app/presenters/wiki_page_presenter.rb

diff --git a/app/models/wiki_page.rb b/app/models/wiki_page.rb
index 50395c346..ff267afce 100644
--- a/app/models/wiki_page.rb
+++ b/app/models/wiki_page.rb
@@ -237,10 +237,6 @@ class WikiPage < ApplicationRecord
     self.dtext_links = DtextLink.new_from_dtext(body)
   end
 
-  def presenter
-    @presenter ||= WikiPagePresenter.new(self)
-  end
-
   def tags
     titles = DText.parse_wiki_titles(body).uniq
     tags = Tag.nonempty.where(name: titles).pluck(:name)
diff --git a/app/presenters/wiki_page_presenter.rb b/app/presenters/wiki_page_presenter.rb
deleted file mode 100644
index 66ef33c83..000000000
--- a/app/presenters/wiki_page_presenter.rb
+++ /dev/null
@@ -1,58 +0,0 @@
-class WikiPagePresenter
-  attr_reader :wiki_page
-
-  def initialize(wiki_page)
-    @wiki_page = wiki_page
-  end
-
-  # Produce a formatted page that shows the difference between two versions of a page.
-  def diff(other_version)
-    pattern = Regexp.new('(?:<.+?>)|(?:[0-9_A-Za-z\x80-\xff]+[\x09\x20]?)|(?:[ \t]+)|(?:\r?\n)|(?:.+?)')
-
-    thisarr = self.body.scan(pattern)
-    otharr = other_version.body.scan(pattern)
-
-    cbo = Diff::LCS::ContextDiffCallbacks.new
-    diffs = thisarr.diff(otharr, cbo)
-
-    escape_html = ->(str) {str.gsub(/&/, '&amp;').gsub(/</, '&lt;').gsub(/>/, '&gt;')}
-
-    output = thisarr
-    output.each { |q| q.replace(CGI.escape_html(q)) }
-
-    diffs.reverse_each do |hunk|
-      newchange = hunk.max {|a, b| a.old_position <=> b.old_position}
-      newstart = newchange.old_position
-      oldstart = hunk.min {|a, b| a.old_position <=> b.old_position}.old_position
-
-      if newchange.action == '+'
-        output.insert(newstart, "</ins>")
-      end
-
-      hunk.reverse_each do |chg|
-        case chg.action
-        when '-'
-          oldstart = chg.old_position
-          output[chg.old_position] = "" if chg.old_element.match(/^\r?\n$/)
-        when '+'
-          if chg.new_element.match(/^\r?\n$/)
-            output.insert(chg.old_position, "[nl]")
-          else
-            output.insert(chg.old_position, (escape_html[chg.new_element]).to_s)
-          end
-        end
-      end
-
-      if newchange.action == '+'
-        output.insert(newstart, "<ins>")
-      end
-
-      if hunk[0].action == '-'
-        output.insert((newstart == oldstart || newchange.action != '+') ? newstart + 1 : newstart, "</del>")
-        output.insert(oldstart, "<del>")
-      end
-    end
-
-    output.join.gsub(/\r?\n/, "[nl]")
-  end
-end