Revert "Refactor web editor"

This reverts commit dfccb06d.
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/controllers/projects/blob_controller.rb

@@ -13,20 +13,27 @@ class Projects::BlobController < Projects::ApplicationController
   before_action :commit, except: [:new, :create]
   before_action :blob, except: [:new, :create]
   before_action :from_merge_request, only: [:edit, :update]
-  before_action :require_branch_head, only: [:edit, :update]
-  before_action :editor_variables, except: [:show, :preview, :diff]
   before_action :after_edit_path, only: [:edit, :update]
+  before_action :require_branch_head, only: [:edit, :update]
 
   def new
     commit unless @repository.empty?
   end
 
   def create
-    result = Files::CreateService.new(@project, current_user, @commit_params).execute
+    file_path = File.join(@path, File.basename(params[:file_name]))
+    result = Files::CreateService.new(
+      @project,
+      current_user,
+      params.merge(new_branch: sanitized_new_branch_name),
+      @ref,
+      file_path
+    ).execute
 
     if result[:status] == :success
       flash[:notice] = "Your changes have been successfully committed"
-      redirect_to namespace_project_blob_path(@project.namespace, @project, File.join(@target_branch, @file_path))
+      ref = sanitized_new_branch_name.presence || @ref
+      redirect_to namespace_project_blob_path(@project.namespace, @project, File.join(ref, file_path))
     else
       flash[:alert] = result[:message]
       render :new
@@ -41,10 +48,22 @@ class Projects::BlobController < Projects::ApplicationController
   end
 
   def update
-    result = Files::UpdateService.new(@project, current_user, @commit_params).execute
+    result = Files::UpdateService.
+      new(
+        @project,
+        current_user,
+        params.merge(new_branch: sanitized_new_branch_name),
+        @ref,
+        @path
+      ).execute
 
     if result[:status] == :success
       flash[:notice] = "Your changes have been successfully committed"
+
+      if from_merge_request
+        from_merge_request.reload_code
+      end
+
       redirect_to after_edit_path
     else
       flash[:alert] = result[:message]
@@ -61,11 +80,12 @@ class Projects::BlobController < Projects::ApplicationController
   end
 
   def destroy
-    result = Files::DeleteService.new(@project, current_user, @commit_params).execute
+    result = Files::DeleteService.new(@project, current_user, params, @ref, @path).execute
 
     if result[:status] == :success
       flash[:notice] = "Your changes have been successfully committed"
-      redirect_to namespace_project_tree_path(@project.namespace, @project, @target_branch)
+      redirect_to namespace_project_tree_path(@project.namespace, @project,
+                                              @ref)
     else
       flash[:alert] = result[:message]
       render :show
@@ -115,6 +135,7 @@ class Projects::BlobController < Projects::ApplicationController
     @id = params[:id]
     @ref, @path = extract_ref(@id)
 
+
   rescue InvalidPathError
     not_found!
   end
@@ -124,8 +145,8 @@ class Projects::BlobController < Projects::ApplicationController
       if from_merge_request
         diffs_namespace_project_merge_request_path(from_merge_request.target_project.namespace, from_merge_request.target_project, from_merge_request) +
           "#file-path-#{hexdigest(@path)}"
-      elsif @target_branch.present?
-        namespace_project_blob_path(@project.namespace, @project, File.join(@target_branch, @path))
+      elsif sanitized_new_branch_name.present?
+        namespace_project_blob_path(@project.namespace, @project, File.join(sanitized_new_branch_name, @path))
       else
         namespace_project_blob_path(@project.namespace, @project, @id)
       end
@@ -139,25 +160,4 @@ class Projects::BlobController < Projects::ApplicationController
   def sanitized_new_branch_name
     @new_branch ||= sanitize(strip_tags(params[:new_branch]))
   end
-
-  def editor_variables
-    @current_branch = @ref
-    @target_branch = (sanitized_new_branch_name || @ref)
-
-    @file_path =
-      if action_name.to_s == 'create'
-        File.join(@path, File.basename(params[:file_name]))
-      else
-        @path
-      end
-
-    @commit_params = {
-      file_path: @file_path,
-      current_branch: @current_branch,
-      target_branch: @target_branch,
-      commit_message: params[:commit_message],
-      file_content: params[:content],
-      file_content_encoding: params[:encoding]
-    }
-  end
 end

app/services/files/base_service.rb

 module Files
   class BaseService < ::BaseService
-    class ValidationError < StandardError; end
+    attr_reader :ref, :path
 
-    def execute
-      @current_branch = params[:current_branch]
-      @target_branch  = params[:target_branch]
-      @commit_message = params[:commit_message]
-      @file_path      = params[:file_path]
-      @file_content   = if params[:file_content_encoding] == 'base64'
-                          Base64.decode64(params[:file_content])
-                        else
-                          params[:file_content]
-                        end
-
-      # Validate parameters
-      validate
-
-      # Create new branch if it different from current_branch
-      if @target_branch != @current_branch
-        create_target_branch
-      end
-
-      if sha = commit
-        after_commit(sha, @target_branch)
-        success
-      else
-        error("Something went wrong. Your changes were not committed")
-      end
-    rescue ValidationError => ex
-      error(ex.message)
+    def initialize(project, user, params, ref, path = nil)
+      @project, @current_user, @params = project, user, params.dup
+      @ref = ref
+      @path = path
     end
 
     private
@@ -37,51 +14,11 @@ module Files
       project.repository
     end
 
-    def after_commit(sha, branch)
+    def after_commit(sha)
       commit = repository.commit(sha)
-      full_ref = "#{Gitlab::Git::BRANCH_REF_PREFIX}#{branch}"
+      full_ref = 'refs/heads/' + (params[:new_branch] || ref)
       old_sha = commit.parent_id || Gitlab::Git::BLANK_SHA
       GitPushService.new.execute(project, current_user, old_sha, sha, full_ref)
     end
-
-    def current_branch
-      @current_branch ||= params[:current_branch]
-    end
-
-    def target_branch
-      @target_branch ||= params[:target_branch]
-    end
-
-    def raise_error(message)
-      raise ValidationError.new(message)
-    end
-
-    def validate
-      allowed = ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(@target_branch)
-
-      unless allowed
-        raise_error("You are not allowed to push into this branch")
-      end
-
-      unless project.empty_repo?
-        unless repository.branch_names.include?(@current_branch)
-          raise_error("You can only create files if you are on top of a branch")
-        end
-
-        if @current_branch != @target_branch
-          if repository.branch_names.include?(@target_branch)
-            raise_error("Branch with such name already exists. You need to switch to this branch in order to make changes")
-          end
-        end
-      end
-    end
-
-    def create_target_branch
-      result = CreateBranchService.new(project, current_user).execute(@target_branch, @current_branch)
-
-      unless result[:status] == :success
-        raise_error("Something went wrong when we tried to create #{@target_branch} for you")
-      end
-    end
   end
 end

app/services/files/create_service.rb

@@ -2,28 +2,58 @@ require_relative "base_service"
 
 module Files
   class CreateService < Files::BaseService
-    def commit
-      repository.commit_file(current_user, @file_path, @file_content, @commit_message, @target_branch)
-    end
+    def execute
+      allowed = Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(ref)
 
-    def validate
-      super
+      unless allowed
+        return error("You are not allowed to create file in this branch")
+      end
 
-      file_name = File.basename(@file_path)
+      file_name = File.basename(path)
+      file_path = path
 
       unless file_name =~ Gitlab::Regex.file_name_regex
-        raise_error(
+        return error(
           'Your changes could not be committed, because the file name ' +
           Gitlab::Regex.file_name_regex_message
         )
       end
 
-      unless project.empty_repo?
-        blob = repository.blob_at_branch(@current_branch, @file_path)
+      if project.empty_repo?
+        # everything is ok because repo does not have a commits yet
+      else
+        unless repository.branch_names.include?(ref)
+          return error("You can only create files if you are on top of a branch")
+        end
+
+        blob = repository.blob_at_branch(ref, file_path)
 
         if blob
-          raise_error("Your changes could not be committed, because file with such name exists")
+          return error("Your changes could not be committed, because file with such name exists")
+        end
       end
+
+      content =
+        if params[:encoding] == 'base64'
+          Base64.decode64(params[:content])
+        else
+          params[:content]
+        end
+
+      sha = repository.commit_file(
+        current_user,
+        file_path,
+        content,
+        params[:commit_message],
+        params[:new_branch] || ref
+      )
+
+
+      if sha
+        after_commit(sha)
+        success
+      else
+        error("Your changes could not be committed, because the file has been changed")
       end
     end
   end

app/services/files/delete_service.rb

@@ -2,8 +2,36 @@ require_relative "base_service"
 
 module Files
   class DeleteService < Files::BaseService
-    def commit
-      repository.remove_file(current_user, @file_path, @commit_message, @target_branch)
+    def execute
+      allowed = ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(ref)
+
+      unless allowed
+        return error("You are not allowed to push into this branch")
+      end
+
+      unless repository.branch_names.include?(ref)
+        return error("You can only create files if you are on top of a branch")
+      end
+
+      blob = repository.blob_at_branch(ref, path)
+
+      unless blob
+        return error("You can only edit text files")
+      end
+
+      sha = repository.remove_file(
+        current_user,
+        path,
+        params[:commit_message],
+        ref
+      )
+
+      if sha
+        after_commit(sha)
+        success
+      else
+        error("Your changes could not be committed, because the file has been changed")
+      end
     end
   end
 end

app/services/files/update_service.rb

@@ -2,8 +2,46 @@ require_relative "base_service"
 
 module Files
   class UpdateService < Files::BaseService
-    def commit
-      repository.commit_file(current_user, @file_path, @file_content, @commit_message, @target_branch)
+    def execute
+      allowed = ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(ref)
+
+      unless allowed
+        return error("You are not allowed to push into this branch")
+      end
+
+      unless repository.branch_names.include?(ref)
+        return error("You can only create files if you are on top of a branch")
+      end
+
+      blob = repository.blob_at_branch(ref, path)
+
+      unless blob
+        return error("You can only edit text files")
+      end
+
+      content =
+        if params[:encoding] == 'base64'
+          Base64.decode64(params[:content])
+        else
+          params[:content]
+        end
+
+      sha = repository.commit_file(
+        current_user,
+        path,
+        content,
+        params[:commit_message],
+        params[:new_branch] || ref
+      )
+
+      after_commit(sha)
+      success
+    rescue Gitlab::Satellite::CheckoutFailed => ex
+      error("Your changes could not be committed because ref '#{ref}' could not be checked out", 400)
+    rescue Gitlab::Satellite::CommitFailed => ex
+      error("Your changes could not be committed. Maybe there was nothing to commit?", 409)
+    rescue Gitlab::Satellite::PushFailed => ex
+      error("Your changes could not be committed. Maybe the file was changed by another process?", 409)
     end
   end
 end

app/views/projects/blob/new.html.haml

@@ -6,7 +6,6 @@
     = render 'shared/commit_message_container', params: params,
              placeholder: 'Add new file'
 
-    - unless @project.empty_repo?
     .form-group.branch
       = label_tag 'branch', class: 'control-label' do
         Branch