Merge remote-tracking branch 'upstream/master' into 27377-preload-pipeline-entity27377-preload-pipeline-entity

* upstream/master: (2534 commits)
  Update VERSION to 9.3.0-pre
  Update CHANGELOG.md for 9.2.0
  removes unnecessary redundacy in usage ping doc
  Respect the typo as rubocop said
  Add a test to ensure this works on MySQL
  Change pipelines schedules help page path
  change domain to hostname in usage ping doc
  Fixes broken MySQL migration for retried
  Show password field mask while editing service settings
  Add notes for supported schedulers and cloud providers
  Move environment monitoring to environments doc
  Add docs for change of Cache/Artifact restore order"
  Avoid resource intensive login checks if password is not provided
  Change translation for 'coding' by 'desarrollo' for Spanish
  Add to docs: issues multiple assignees
  rename "Add emoji" and "Award emoji" to "Add reaction" where appropriate
  Add project and group notification settings info
  32570 Fix border-bottom for project activity tab
  Add users endpoint to frontend API class
  Rename users on mysql
  ...

1 files changed, 43 insertions, 24 deletions

diff --git a/app/controllers/snippets_controller.rb b/app/controllers/snippets_controller.rb
index f3fd3da8b20..7445f61195d 100644
--- a/app/controllers/snippets_controller.rb
+++ b/app/controllers/snippets_controller.rb
@@ -1,12 +1,14 @@
 class SnippetsController < ApplicationController
+  include RendersNotes
   include ToggleAwardEmoji
   include SpammableActions
   include SnippetsActions
+  include RendersBlob
 
-  before_action :snippet, only: [:show, :edit, :destroy, :update, :raw, :download]
+  before_action :snippet, only: [:show, :edit, :destroy, :update, :raw]
 
   # Allow read snippet
-  before_action :authorize_read_snippet!, only: [:show, :raw, :download]
+  before_action :authorize_read_snippet!, only: [:show, :raw]
 
   # Allow modify snippet
   before_action :authorize_update_snippet!, only: [:edit, :update]
@@ -14,7 +16,7 @@ class SnippetsController < ApplicationController
   # Allow destroy snippet
   before_action :authorize_admin_snippet!, only: [:destroy]
 
-  skip_before_action :authenticate_user!, only: [:index, :show, :raw, :download]
+  skip_before_action :authenticate_user!, only: [:index, :show, :raw]
 
   layout 'snippets'
   respond_to :html
@@ -25,12 +27,8 @@ class SnippetsController < ApplicationController
 
       return render_404 unless @user
 
-      @snippets = SnippetsFinder.new.execute(current_user, {
-        filter: :by_user,
-        user: @user,
-        scope: params[:scope]
-      })
-      .page(params[:page])
+      @snippets = SnippetsFinder.new(current_user, author: @user, scope: params[:scope])
+        .execute.page(params[:page])
 
       render 'index'
     else
@@ -59,6 +57,24 @@ class SnippetsController < ApplicationController
   end
 
   def show
+    blob = @snippet.blob
+    override_max_blob_size(blob)
+
+    @note = Note.new(noteable: @snippet)
+    @noteable = @snippet
+
+    @discussions = @snippet.discussions
+    @notes = prepare_notes_for_rendering(@discussions.flat_map(&:notes))
+
+    respond_to do |format|
+      format.html do
+        render 'show'
+      end
+
+      format.json do
+        render_blob_json(blob)
+      end
+    end
   end
 
   def destroy
@@ -69,31 +85,34 @@ class SnippetsController < ApplicationController
     redirect_to snippets_path
   end
 
-  def download
-    send_data(
-      convert_line_endings(@snippet.content),
-      type: 'text/plain; charset=utf-8',
-      filename: @snippet.sanitized_file_name
-    )
+  def preview_markdown
+    result = PreviewMarkdownService.new(@project, current_user, params).execute
+
+    render json: {
+      body: view_context.markdown(result[:text], skip_project_check: true),
+      references: {
+        users: result[:users]
+      }
+    }
   end
 
   protected
 
   def snippet
-    @snippet ||= if current_user
-                   PersonalSnippet.where("author_id = ? OR visibility_level IN (?)",
-                     current_user.id,
-                     [Snippet::PUBLIC, Snippet::INTERNAL]).
-                     find(params[:id])
-                 else
-                   PersonalSnippet.find(params[:id])
-                 end
+    @snippet ||= PersonalSnippet.find_by(id: params[:id])
   end
+
   alias_method :awardable, :snippet
   alias_method :spammable, :snippet
 
   def authorize_read_snippet!
-    authenticate_user! unless can?(current_user, :read_personal_snippet, @snippet)
+    return if can?(current_user, :read_personal_snippet, @snippet)
+
+    if current_user
+      render_404
+    else
+      authenticate_user!
+    end
   end
 
   def authorize_update_snippet!