Update migrated repositories' issues/comments/prs poster id if user has a github external user saved (#7751)

* update migrated issues/comments when login as github

* add get userid when migrating or login with github oauth2

* fix lint

* add migrations for repository service type

* fix build

* remove unnecessary dependencies on migrations

* add cron task to update migrations poster ids and fix posterid when migrating

* fix lint

* fix lint

* improve code

* fix lint

* improve code

* replace releases publish id to actual author id

* fix import

* fix bug

* fix lint

* fix rawdata definition

* fix some bugs

* fix error message

models/migrations/v100.go

@@ -0,0 +1,83 @@
+// 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 migrations
+
+import (
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/go-xorm/xorm"
+)
+
+func updateMigrationServiceTypes(x *xorm.Engine) error {
+	type Repository struct {
+		ID                  int64
+		OriginalServiceType int    `xorm:"index default(0)"`
+		OriginalURL         string `xorm:"VARCHAR(2048)"`
+	}
+
+	if err := x.Sync2(new(Repository)); err != nil {
+		return err
+	}
+
+	var last int
+	const batchSize = 50
+	for {
+		var results = make([]Repository, 0, batchSize)
+		err := x.Where("original_url <> '' AND original_url IS NOT NULL").
+			And("original_service_type = 0 OR original_service_type IS NULL").
+			OrderBy("id").
+			Limit(batchSize, last).
+			Find(&results)
+		if err != nil {
+			return err
+		}
+		if len(results) == 0 {
+			break
+		}
+		last += len(results)
+
+		const PlainGitService = 1 // 1 plain git service
+		const GithubService = 2   // 2 github.com
+
+		for _, res := range results {
+			u, err := url.Parse(res.OriginalURL)
+			if err != nil {
+				return err
+			}
+			var serviceType = PlainGitService
+			if strings.EqualFold(u.Host, "github.com") {
+				serviceType = GithubService
+			}
+			_, err = x.Exec("UPDATE repository SET original_service_type = ? WHERE id = ?", serviceType, res.ID)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	type ExternalLoginUser struct {
+		ExternalID        string                 `xorm:"pk NOT NULL"`
+		UserID            int64                  `xorm:"INDEX NOT NULL"`
+		LoginSourceID     int64                  `xorm:"pk NOT NULL"`
+		RawData           map[string]interface{} `xorm:"TEXT JSON"`
+		Provider          string                 `xorm:"index VARCHAR(25)"`
+		Email             string
+		Name              string
+		FirstName         string
+		LastName          string
+		NickName          string
+		Description       string
+		AvatarURL         string
+		Location          string
+		AccessToken       string
+		AccessTokenSecret string
+		RefreshToken      string
+		ExpiresAt         time.Time
+	}
+
+	return x.Sync2(new(ExternalLoginUser))
+}