From 03e0604d5ded6402c7fddc4001ab23d9712c98de Mon Sep 17 00:00:00 2001
From: Oswaldo Ferreira <oswaldo@gitlab.com>
Date: Fri, 15 Mar 2019 14:35:34 -0300
Subject: Prepare suggestion implementation for multi-line

Adds the groundwork needed in order to persist multi-line suggestions,
while providing the parsing strategy which will be reused for the
**Preview** as well.
---
 app/services/concerns/suggestible.rb | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 app/services/concerns/suggestible.rb

(limited to 'app/services/concerns/suggestible.rb')

diff --git a/app/services/concerns/suggestible.rb b/app/services/concerns/suggestible.rb
new file mode 100644
index 00000000000..0b9822b1909
--- /dev/null
+++ b/app/services/concerns/suggestible.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+module Suggestible
+  extend ActiveSupport::Concern
+
+  # This translates into limiting suggestion changes to `suggestion:-100+100`.
+  MAX_LINES_CONTEXT = 100.freeze
+
+  def fetch_from_content
+    diff_file.new_blob_lines_between(from_line, to_line).join
+  end
+
+  def from_line
+    real_above = [lines_above, MAX_LINES_CONTEXT].min
+    [target_line - real_above, 1].max
+  end
+
+  def to_line
+    real_below = [lines_below, MAX_LINES_CONTEXT].min
+    target_line + real_below
+  end
+
+  def diff_file
+    raise NotImplementedError
+  end
+
+  def target_line
+    raise NotImplementedError
+  end
+end
-- 
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