Search::GlobalContext and Search::ProjectContext for separation between 2 types of search

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/contexts/search/global_context.rb

+module Search
+  class GlobalContext
+    attr_accessor :current_user, :params
+
+    def initialize(user, params)
+      @current_user, @params = user, params.dup
+    end
+
+    def execute
+      query = params[:search]
+      query = Shellwords.shellescape(query) if query.present?
+      return result unless query.present?
+
+
+      projects = current_user.authorized_projects
+
+      if params[:group_id].present?
+        group = Group.find_by_id(params[:group_id])
+        projects = projects.where(namespace_id: group.id) if group
+      end
+
+      project_ids = projects.pluck(:id)
+
+      visibility_levels = if current_user
+                            [Gitlab::VisibilityLevel::INTERNAL, Gitlab::VisibilityLevel::PUBLIC]
+                          else
+                            [Gitlab::VisibilityLevel::PUBLIC]
+                          end
+      result[:projects] = Project.where("projects.id in (?) OR projects.visibility_level in (?)", project_ids, visibility_levels).search(query).limit(20)
+      result[:merge_requests] = MergeRequest.in_projects(project_ids).search(query).order('updated_at DESC').limit(20)
+      result[:issues] = Issue.where(project_id: project_ids).search(query).order('updated_at DESC').limit(20)
+      result[:total_results] = %w(projects issues merge_requests).sum { |items| result[items.to_sym].size }
+      result
+    end
+
+    def result
+      @result ||= {
+        projects: [],
+        merge_requests: [],
+        issues: [],
+        total_results: 0,
+      }
+    end
+  end
+end

app/contexts/search/project_context.rb

+module Search
+  class ProjectContext
+    attr_accessor :project, :current_user, :params
+
+    def initialize(project, user, params)
+      @project, @current_user, @params = project, user, params.dup
+    end
+
+    def execute
+      query = params[:search]
+      query = Shellwords.shellescape(query) if query.present?
+      return result unless query.present?
+
+      if params[:search_code].present?
+        blobs = project.repository.search_files(query, params[:repository_ref]) unless project.empty_repo?
+        blobs = Kaminari.paginate_array(blobs).page(params[:page]).per(20)
+        result[:blobs] = blobs
+        result[:total_results] = blobs.total_count
+      else
+        result[:merge_requests] = project.merge_requests.search(query).order('updated_at DESC').limit(20)
+        result[:issues] = project.issues.search(query).order('updated_at DESC').limit(20)
+        result[:total_results] = %w(issues merge_requests).sum { |items| result[items.to_sym].size }
+      end
+
+      result
+    end
+
+    def result
+      @result ||= {
+        merge_requests: [],
+        issues: [],
+        blobs: [],
+        total_results: 0,
+      }
+    end
+  end
+end