Split migrations folder (#21549)

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

models/migrations/v1_9/v85.go

@@ -0,0 +1,120 @@
+// Copyright 2019 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_9 //nolint
+
+import (
+	"fmt"
+
+	"code.gitea.io/gitea/models/migrations/base"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/timeutil"
+	"code.gitea.io/gitea/modules/util"
+
+	"xorm.io/xorm"
+)
+
+func HashAppToken(x *xorm.Engine) error {
+	// AccessToken see models/token.go
+	type AccessToken struct {
+		ID             int64 `xorm:"pk autoincr"`
+		UID            int64 `xorm:"INDEX"`
+		Name           string
+		Sha1           string
+		Token          string `xorm:"-"`
+		TokenHash      string // sha256 of token - we will ensure UNIQUE later
+		TokenSalt      string
+		TokenLastEight string `xorm:"token_last_eight"`
+
+		CreatedUnix       timeutil.TimeStamp `xorm:"INDEX created"`
+		UpdatedUnix       timeutil.TimeStamp `xorm:"INDEX updated"`
+		HasRecentActivity bool               `xorm:"-"`
+		HasUsed           bool               `xorm:"-"`
+	}
+
+	// First remove the index
+	sess := x.NewSession()
+	defer sess.Close()
+
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	if err := sess.Sync2(new(AccessToken)); err != nil {
+		return fmt.Errorf("Sync2: %w", err)
+	}
+
+	if err := sess.Commit(); err != nil {
+		return err
+	}
+
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	// transform all tokens to hashes
+	const batchSize = 100
+	for start := 0; ; start += batchSize {
+		tokens := make([]*AccessToken, 0, batchSize)
+		if err := sess.Limit(batchSize, start).Find(&tokens); err != nil {
+			return err
+		}
+		if len(tokens) == 0 {
+			break
+		}
+
+		for _, token := range tokens {
+			// generate salt
+			salt, err := util.CryptoRandomString(10)
+			if err != nil {
+				return err
+			}
+			token.TokenSalt = salt
+			token.TokenHash = base.HashToken(token.Sha1, salt)
+			if len(token.Sha1) < 8 {
+				log.Warn("Unable to transform token %s with name %s belonging to user ID %d, skipping transformation", token.Sha1, token.Name, token.UID)
+				continue
+			}
+			token.TokenLastEight = token.Sha1[len(token.Sha1)-8:]
+			token.Sha1 = "" // ensure to blank out column in case drop column doesn't work
+
+			if _, err := sess.ID(token.ID).Cols("token_hash, token_salt, token_last_eight, sha1").Update(token); err != nil {
+				return fmt.Errorf("couldn't add in sha1, token_hash, token_salt and token_last_eight: %w", err)
+			}
+
+		}
+	}
+
+	// Commit and begin new transaction for dropping columns
+	if err := sess.Commit(); err != nil {
+		return err
+	}
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	if err := base.DropTableColumns(sess, "access_token", "sha1"); err != nil {
+		return err
+	}
+	if err := sess.Commit(); err != nil {
+		return err
+	}
+	return resyncHashAppTokenWithUniqueHash(x)
+}
+
+func resyncHashAppTokenWithUniqueHash(x *xorm.Engine) error {
+	// AccessToken see models/token.go
+	type AccessToken struct {
+		TokenHash string `xorm:"UNIQUE"` // sha256 of token - we will ensure UNIQUE later
+	}
+	sess := x.NewSession()
+	defer sess.Close()
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+	if err := sess.Sync2(new(AccessToken)); err != nil {
+		return fmt.Errorf("Sync2: %w", err)
+	}
+	return sess.Commit()
+}