From 47b4a1befb5d8f2736e8e5d00f3f04c79d8ec323 Mon Sep 17 00:00:00 2001
From: Paco Guzman <pacoguzmanp@gmail.com>
Date: Tue, 23 Aug 2016 06:59:42 +0200
Subject: WIP Cache diff_file diffs content

TODO

- some variations missing (plain and email)
---
 app/views/projects/diffs/_file.html.haml          | 30 ++++++++++++++++++++++-
 app/views/projects/diffs/_line.html.haml          |  8 ++----
 app/views/projects/diffs/_parallel_view.html.haml |  7 +++---
 app/views/projects/diffs/_text_file.html.haml     |  3 +--
 4 files changed, 35 insertions(+), 13 deletions(-)

diff --git a/app/views/projects/diffs/_file.html.haml b/app/views/projects/diffs/_file.html.haml
index ad2eb3e504f..4e60ebc6745 100644
--- a/app/views/projects/diffs/_file.html.haml
+++ b/app/views/projects/diffs/_file.html.haml
@@ -16,4 +16,32 @@
 
         = view_file_btn(diff_commit.id, diff_file.new_path, project)
 
-  = render 'projects/diffs/content', diff_file: diff_file, diff_commit: diff_commit, blob: blob, project: project
+  - cache_key = [diff_file.diff_refs.base_sha, diff_file.diff_refs.start_sha, diff_file.diff_refs.head_sha, diff_file.file_path, diff_view]
+  - content_html = Rails.cache.fetch(cache_key) do
+    - render 'projects/diffs/content', diff_file: diff_file, diff_commit: diff_commit, blob: blob, project: project
+
+  - unless @diff_notes_disabled
+    - if discussions = @grouped_diff_discussions
+      - discussions = discussions.values.flatten.group_by { |d| d.diff_file.file_path } if discussions
+      - discussions = discussions[diff_file.file_path] if discussions
+      - if discussions
+        - if diff_view == :inline
+          - discussions.each do |discussion|
+            - discussion_html = render "discussions/diff_discussion", discussion: discussion, expanded: true
+            - content_html.sub!(/<!--\ninject discussions #{discussion.line_code}\n-->/, discussion_html)
+        - elsif diff_view == :parallel
+          - diff_file.parallel_diff_lines.each do |line|
+            - left = line[:left]
+            - right = line[:right]
+            - if left || right
+              - discussions.each do |_discussion|
+                - discussion_left, discussion_right = parallel_diff_discussions(left, right, diff_file)
+                - if discussion_left || discussion_right
+                  - # Delete already rendered discussion from the original collection
+                  - @grouped_diff_discussions.delete(discussion_left.try(:line_code))
+                  - @grouped_diff_discussions.delete(discussion_right.try(:line_code))
+                  - discussion_html = render "discussions/parallel_diff_discussion", discussion_left: discussion_left, discussion_right: discussion_right
+                  - content_html.sub!(/<!--\ninject discussions\s#{discussion_left.try(:line_code) || '.*'}\s\|\s#{discussion_right.try(:line_code) || '.*'}\n-->/, discussion_html)
+
+  - content_html.gsub!(/<!--\ninject discussions\s.*\n-->/, '')
+  =raw content_html
diff --git a/app/views/projects/diffs/_line.html.haml b/app/views/projects/diffs/_line.html.haml
index 7042e9f1fc9..8564baf19a3 100644
--- a/app/views/projects/diffs/_line.html.haml
+++ b/app/views/projects/diffs/_line.html.haml
@@ -29,9 +29,5 @@
       - else
         = diff_line_content(line.text, type)
 
-- discussions = local_assigns.fetch(:discussions, nil)
-- if discussions && !line.meta?
-  - discussion = discussions[line_code]
-  - if discussion
-    - discussion_expanded = local_assigns.fetch(:discussion_expanded, discussion.expanded?)
-    = render "discussions/diff_discussion", discussion: discussion, expanded: discussion_expanded
+    /
+      = "inject discussions #{line_code}"
diff --git a/app/views/projects/diffs/_parallel_view.html.haml b/app/views/projects/diffs/_parallel_view.html.haml
index 28aad3f4725..8fa2d8b4a74 100644
--- a/app/views/projects/diffs/_parallel_view.html.haml
+++ b/app/views/projects/diffs/_parallel_view.html.haml
@@ -33,9 +33,8 @@
           %td.old_line.diff-line-num.empty-cell
           %td.line_content.parallel
 
-      - unless @diff_notes_disabled
-        - discussion_left, discussion_right = parallel_diff_discussions(left, right, diff_file)
-        - if discussion_left || discussion_right
-          = render "discussions/parallel_diff_discussion", discussion_left: discussion_left, discussion_right: discussion_right
+      - if left_line_code || right_line_code
+        /
+          = "inject discussions #{left_line_code} | #{right_line_code}"
     - if !diff_file.new_file && last_line > 0
       = diff_match_line last_line, last_line, bottom: true, view: :parallel
diff --git a/app/views/projects/diffs/_text_file.html.haml b/app/views/projects/diffs/_text_file.html.haml
index f1d2d4bf268..2f597ebd1a4 100644
--- a/app/views/projects/diffs/_text_file.html.haml
+++ b/app/views/projects/diffs/_text_file.html.haml
@@ -5,11 +5,10 @@
 
 %table.text-file.code.js-syntax-highlight{ data: diff_view_data, class: too_big ? 'hide' : '' }
   - last_line = 0
-  - discussions = @grouped_diff_discussions unless @diff_notes_disabled
   = render partial: "projects/diffs/line",
     collection: diff_file.highlighted_diff_lines,
     as: :line,
-    locals: { diff_file: diff_file, discussions: discussions }
+    locals: { diff_file: diff_file }
 
   - last_line = diff_file.highlighted_diff_lines.last.new_pos
   - if !diff_file.new_file && last_line > 0
-- 
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