Split migrations folder (#21549)

There are too many files in `models/migrations` folder so that I split
them into sub folders.

models/migrations/v1_13/v147.go

@@ -0,0 +1,154 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package v1_13 //nolint
+
+import (
+	"code.gitea.io/gitea/modules/timeutil"
+
+	"xorm.io/xorm"
+)
+
+func CreateReviewsForCodeComments(x *xorm.Engine) error {
+	// Review
+	type Review struct {
+		ID               int64 `xorm:"pk autoincr"`
+		Type             int
+		ReviewerID       int64 `xorm:"index"`
+		OriginalAuthor   string
+		OriginalAuthorID int64
+		IssueID          int64  `xorm:"index"`
+		Content          string `xorm:"TEXT"`
+		// Official is a review made by an assigned approver (counts towards approval)
+		Official bool   `xorm:"NOT NULL DEFAULT false"`
+		CommitID string `xorm:"VARCHAR(40)"`
+		Stale    bool   `xorm:"NOT NULL DEFAULT false"`
+
+		CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
+		UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
+	}
+
+	const ReviewTypeComment = 2
+
+	// Comment represents a comment in commit and issue page.
+	type Comment struct {
+		ID               int64 `xorm:"pk autoincr"`
+		Type             int   `xorm:"INDEX"`
+		PosterID         int64 `xorm:"INDEX"`
+		OriginalAuthor   string
+		OriginalAuthorID int64
+		IssueID          int64 `xorm:"INDEX"`
+		LabelID          int64
+		OldProjectID     int64
+		ProjectID        int64
+		OldMilestoneID   int64
+		MilestoneID      int64
+		AssigneeID       int64
+		RemovedAssignee  bool
+		ResolveDoerID    int64
+		OldTitle         string
+		NewTitle         string
+		OldRef           string
+		NewRef           string
+		DependentIssueID int64
+
+		CommitID int64
+		Line     int64 // - previous line / + proposed line
+		TreePath string
+		Content  string `xorm:"TEXT"`
+
+		// Path represents the 4 lines of code cemented by this comment
+		PatchQuoted string `xorm:"TEXT patch"`
+
+		CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
+		UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
+
+		// Reference issue in commit message
+		CommitSHA string `xorm:"VARCHAR(40)"`
+
+		ReviewID    int64 `xorm:"index"`
+		Invalidated bool
+
+		// Reference an issue or pull from another comment, issue or PR
+		// All information is about the origin of the reference
+		RefRepoID    int64 `xorm:"index"` // Repo where the referencing
+		RefIssueID   int64 `xorm:"index"`
+		RefCommentID int64 `xorm:"index"`    // 0 if origin is Issue title or content (or PR's)
+		RefAction    int   `xorm:"SMALLINT"` // What happens if RefIssueID resolves
+		RefIsPull    bool
+	}
+
+	if err := x.Sync2(new(Review), new(Comment)); err != nil {
+		return err
+	}
+
+	updateComment := func(comments []*Comment) error {
+		sess := x.NewSession()
+		defer sess.Close()
+		if err := sess.Begin(); err != nil {
+			return err
+		}
+
+		for _, comment := range comments {
+			review := &Review{
+				Type:             ReviewTypeComment,
+				ReviewerID:       comment.PosterID,
+				IssueID:          comment.IssueID,
+				Official:         false,
+				CommitID:         comment.CommitSHA,
+				Stale:            comment.Invalidated,
+				OriginalAuthor:   comment.OriginalAuthor,
+				OriginalAuthorID: comment.OriginalAuthorID,
+				CreatedUnix:      comment.CreatedUnix,
+				UpdatedUnix:      comment.CreatedUnix,
+			}
+			if _, err := sess.NoAutoTime().Insert(review); err != nil {
+				return err
+			}
+
+			reviewComment := &Comment{
+				Type:             22,
+				PosterID:         comment.PosterID,
+				Content:          "",
+				IssueID:          comment.IssueID,
+				ReviewID:         review.ID,
+				OriginalAuthor:   comment.OriginalAuthor,
+				OriginalAuthorID: comment.OriginalAuthorID,
+				CreatedUnix:      comment.CreatedUnix,
+				UpdatedUnix:      comment.CreatedUnix,
+			}
+			if _, err := sess.NoAutoTime().Insert(reviewComment); err != nil {
+				return err
+			}
+
+			comment.ReviewID = review.ID
+			if _, err := sess.ID(comment.ID).Cols("review_id").NoAutoTime().Update(comment); err != nil {
+				return err
+			}
+		}
+
+		return sess.Commit()
+	}
+
+	start := 0
+	batchSize := 100
+	for {
+		comments := make([]*Comment, 0, batchSize)
+		if err := x.Where("review_id = 0 and type = 21").Limit(batchSize, start).Find(&comments); err != nil {
+			return err
+		}
+
+		if err := updateComment(comments); err != nil {
+			return err
+		}
+
+		start += len(comments)
+
+		if len(comments) < batchSize {
+			break
+		}
+	}
+
+	return nil
+}