// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.

package sqlstore

import (
	"encoding/json"
	"fmt"
	"os"
	"strings"
	"time"

	"github.com/mattermost/mattermost-server/mlog"
	"github.com/mattermost/mattermost-server/model"
)

const (
	VERSION_5_5_0            = "5.5.0"
	VERSION_5_4_0            = "5.4.0"
	VERSION_5_3_0            = "5.3.0"
	VERSION_5_2_0            = "5.2.0"
	VERSION_5_1_0            = "5.1.0"
	VERSION_5_0_0            = "5.0.0"
	VERSION_4_10_0           = "4.10.0"
	VERSION_4_9_0            = "4.9.0"
	VERSION_4_8_1            = "4.8.1"
	VERSION_4_8_0            = "4.8.0"
	VERSION_4_7_2            = "4.7.2"
	VERSION_4_7_1            = "4.7.1"
	VERSION_4_7_0            = "4.7.0"
	VERSION_4_6_0            = "4.6.0"
	VERSION_4_5_0            = "4.5.0"
	VERSION_4_4_0            = "4.4.0"
	VERSION_4_3_0            = "4.3.0"
	VERSION_4_2_0            = "4.2.0"
	VERSION_4_1_0            = "4.1.0"
	VERSION_4_0_0            = "4.0.0"
	VERSION_3_10_0           = "3.10.0"
	VERSION_3_9_0            = "3.9.0"
	VERSION_3_8_0            = "3.8.0"
	VERSION_3_7_0            = "3.7.0"
	VERSION_3_6_0            = "3.6.0"
	VERSION_3_5_0            = "3.5.0"
	VERSION_3_4_0            = "3.4.0"
	VERSION_3_3_0            = "3.3.0"
	VERSION_3_2_0            = "3.2.0"
	VERSION_3_1_0            = "3.1.0"
	VERSION_3_0_0            = "3.0.0"
	OLDEST_SUPPORTED_VERSION = VERSION_3_0_0
)

const (
	EXIT_VERSION_SAVE_MISSING = 1001
	EXIT_TOO_OLD              = 1002
	EXIT_VERSION_SAVE         = 1003
	EXIT_THEME_MIGRATION      = 1004
)

func UpgradeDatabase(sqlStore SqlStore) {

	UpgradeDatabaseToVersion31(sqlStore)
	UpgradeDatabaseToVersion32(sqlStore)
	UpgradeDatabaseToVersion33(sqlStore)
	UpgradeDatabaseToVersion34(sqlStore)
	UpgradeDatabaseToVersion35(sqlStore)
	UpgradeDatabaseToVersion36(sqlStore)
	UpgradeDatabaseToVersion37(sqlStore)
	UpgradeDatabaseToVersion38(sqlStore)
	UpgradeDatabaseToVersion39(sqlStore)
	UpgradeDatabaseToVersion310(sqlStore)
	UpgradeDatabaseToVersion40(sqlStore)
	UpgradeDatabaseToVersion41(sqlStore)
	UpgradeDatabaseToVersion42(sqlStore)
	UpgradeDatabaseToVersion43(sqlStore)
	UpgradeDatabaseToVersion44(sqlStore)
	UpgradeDatabaseToVersion45(sqlStore)
	UpgradeDatabaseToVersion46(sqlStore)
	UpgradeDatabaseToVersion47(sqlStore)
	UpgradeDatabaseToVersion471(sqlStore)
	UpgradeDatabaseToVersion472(sqlStore)
	UpgradeDatabaseToVersion48(sqlStore)
	UpgradeDatabaseToVersion481(sqlStore)
	UpgradeDatabaseToVersion49(sqlStore)
	UpgradeDatabaseToVersion410(sqlStore)
	UpgradeDatabaseToVersion50(sqlStore)
	UpgradeDatabaseToVersion51(sqlStore)
	UpgradeDatabaseToVersion52(sqlStore)
	UpgradeDatabaseToVersion53(sqlStore)
	UpgradeDatabaseToVersion54(sqlStore)
	UpgradeDatabaseToVersion55(sqlStore)

	// If the SchemaVersion is empty this this is the first time it has ran
	// so lets set it to the current version.
	if sqlStore.GetCurrentSchemaVersion() == "" {
		if result := <-sqlStore.System().SaveOrUpdate(&model.System{Name: "Version", Value: model.CurrentVersion}); result.Err != nil {
			mlog.Critical(result.Err.Error())
			time.Sleep(time.Second)
			os.Exit(EXIT_VERSION_SAVE_MISSING)
		}

		mlog.Info(fmt.Sprintf("The database schema has been set to version %v", model.CurrentVersion))
	}

	// If we're not on the current version then it's too old to be upgraded
	if sqlStore.GetCurrentSchemaVersion() != model.CurrentVersion {
		mlog.Critical(fmt.Sprintf("Database schema version %v is no longer supported. This Mattermost server supports automatic upgrades from schema version %v through schema version %v. Downgrades are not supported. Please manually upgrade to at least version %v before continuing", sqlStore.GetCurrentSchemaVersion(), OLDEST_SUPPORTED_VERSION, model.CurrentVersion, OLDEST_SUPPORTED_VERSION))
		time.Sleep(time.Second)
		os.Exit(EXIT_TOO_OLD)
	}
}

func saveSchemaVersion(sqlStore SqlStore, version string) {
	if result := <-sqlStore.System().Update(&model.System{Name: "Version", Value: version}); result.Err != nil {
		mlog.Critical(result.Err.Error())
		time.Sleep(time.Second)
		os.Exit(EXIT_VERSION_SAVE)
	}

	mlog.Warn(fmt.Sprintf("The database schema has been upgraded to version %v", version))
}

func shouldPerformUpgrade(sqlStore SqlStore, currentSchemaVersion string, expectedSchemaVersion string) bool {
	if sqlStore.GetCurrentSchemaVersion() == currentSchemaVersion {
		mlog.Warn(fmt.Sprintf("The database schema version of %v appears to be out of date", currentSchemaVersion))
		mlog.Warn(fmt.Sprintf("Attempting to upgrade the database schema version to %v", expectedSchemaVersion))

		return true
	}

	return false
}

func UpgradeDatabaseToVersion31(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_3_0_0, VERSION_3_1_0) {
		sqlStore.CreateColumnIfNotExists("OutgoingWebhooks", "ContentType", "varchar(128)", "varchar(128)", "")
		saveSchemaVersion(sqlStore, VERSION_3_1_0)
	}
}

func UpgradeDatabaseToVersion32(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_3_1_0, VERSION_3_2_0) {
		sqlStore.CreateColumnIfNotExists("TeamMembers", "DeleteAt", "bigint(20)", "bigint", "0")

		saveSchemaVersion(sqlStore, VERSION_3_2_0)
	}
}

func themeMigrationFailed(err error) {
	mlog.Critical(fmt.Sprintf("Failed to migrate User.ThemeProps to Preferences table %v", err))
	time.Sleep(time.Second)
	os.Exit(EXIT_THEME_MIGRATION)
}

func UpgradeDatabaseToVersion33(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_3_2_0, VERSION_3_3_0) {
		if sqlStore.DoesColumnExist("Users", "ThemeProps") {
			params := map[string]interface{}{
				"Category": model.PREFERENCE_CATEGORY_THEME,
				"Name":     "",
			}

			transaction, err := sqlStore.GetMaster().Begin()
			if err != nil {
				themeMigrationFailed(err)
			}

			// increase size of Value column of Preferences table to match the size of the ThemeProps column
			if sqlStore.DriverName() == model.DATABASE_DRIVER_POSTGRES {
				if _, err := transaction.Exec("ALTER TABLE Preferences ALTER COLUMN Value TYPE varchar(2000)"); err != nil {
					themeMigrationFailed(err)
				}
			} else if sqlStore.DriverName() == model.DATABASE_DRIVER_MYSQL {
				if _, err := transaction.Exec("ALTER TABLE Preferences MODIFY Value text"); err != nil {
					themeMigrationFailed(err)
				}
			}

			// copy data across
			if _, err := transaction.Exec(
				`INSERT INTO
					Preferences(UserId, Category, Name, Value)
				SELECT
					Id, '`+model.PREFERENCE_CATEGORY_THEME+`', '', ThemeProps
				FROM
					Users
				WHERE
					Users.ThemeProps != 'null'`, params); err != nil {
				themeMigrationFailed(err)
			}

			// delete old data
			if _, err := transaction.Exec("ALTER TABLE Users DROP COLUMN ThemeProps"); err != nil {
				themeMigrationFailed(err)
			}

			if err := transaction.Commit(); err != nil {
				themeMigrationFailed(err)
			}

			// rename solarized_* code themes to solarized-* to match client changes in 3.0
			var data model.Preferences
			if _, err := sqlStore.GetMaster().Select(&data, "SELECT * FROM Preferences WHERE Category = '"+model.PREFERENCE_CATEGORY_THEME+"' AND Value LIKE '%solarized_%'"); err == nil {
				for i := range data {
					data[i].Value = strings.Replace(data[i].Value, "solarized_", "solarized-", -1)
				}

				sqlStore.Preference().Save(&data)
			}
		}

		sqlStore.CreateColumnIfNotExists("OAuthApps", "IsTrusted", "tinyint(1)", "boolean", "0")
		sqlStore.CreateColumnIfNotExists("OAuthApps", "IconURL", "varchar(512)", "varchar(512)", "")
		sqlStore.CreateColumnIfNotExists("OAuthAccessData", "ClientId", "varchar(26)", "varchar(26)", "")
		sqlStore.CreateColumnIfNotExists("OAuthAccessData", "UserId", "varchar(26)", "varchar(26)", "")
		sqlStore.CreateColumnIfNotExists("OAuthAccessData", "ExpiresAt", "bigint", "bigint", "0")

		if sqlStore.DoesColumnExist("OAuthAccessData", "AuthCode") {
			sqlStore.RemoveIndexIfExists("idx_oauthaccessdata_auth_code", "OAuthAccessData")
			sqlStore.RemoveColumnIfExists("OAuthAccessData", "AuthCode")
		}

		sqlStore.RemoveColumnIfExists("Users", "LastActivityAt")
		sqlStore.RemoveColumnIfExists("Users", "LastPingAt")

		sqlStore.CreateColumnIfNotExists("OutgoingWebhooks", "TriggerWhen", "tinyint", "integer", "0")

		saveSchemaVersion(sqlStore, VERSION_3_3_0)
	}
}

func UpgradeDatabaseToVersion34(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_3_3_0, VERSION_3_4_0) {
		sqlStore.CreateColumnIfNotExists("Status", "Manual", "BOOLEAN", "BOOLEAN", "0")
		sqlStore.CreateColumnIfNotExists("Status", "ActiveChannel", "varchar(26)", "varchar(26)", "")

		saveSchemaVersion(sqlStore, VERSION_3_4_0)
	}
}

func UpgradeDatabaseToVersion35(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_3_4_0, VERSION_3_5_0) {
		sqlStore.GetMaster().Exec("UPDATE Users SET Roles = 'system_user' WHERE Roles = ''")
		sqlStore.GetMaster().Exec("UPDATE Users SET Roles = 'system_user system_admin' WHERE Roles = 'system_admin'")
		sqlStore.GetMaster().Exec("UPDATE TeamMembers SET Roles = 'team_user' WHERE Roles = ''")
		sqlStore.GetMaster().Exec("UPDATE TeamMembers SET Roles = 'team_user team_admin' WHERE Roles = 'admin'")
		sqlStore.GetMaster().Exec("UPDATE ChannelMembers SET Roles = 'channel_user' WHERE Roles = ''")
		sqlStore.GetMaster().Exec("UPDATE ChannelMembers SET Roles = 'channel_user channel_admin' WHERE Roles = 'admin'")

		// The rest of the migration from Filenames -> FileIds is done lazily in api.GetFileInfosForPost
		sqlStore.CreateColumnIfNotExists("Posts", "FileIds", "varchar(150)", "varchar(150)", "[]")

		// Increase maximum length of the Channel table Purpose column.
		if sqlStore.GetMaxLengthOfColumnIfExists("Channels", "Purpose") != "250" {
			sqlStore.AlterColumnTypeIfExists("Channels", "Purpose", "varchar(250)", "varchar(250)")
		}

		sqlStore.Session().RemoveAllSessions()

		saveSchemaVersion(sqlStore, VERSION_3_5_0)
	}
}

func UpgradeDatabaseToVersion36(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_3_5_0, VERSION_3_6_0) {
		sqlStore.CreateColumnIfNotExists("Posts", "HasReactions", "tinyint", "boolean", "0")

		// Create Team Description column
		sqlStore.CreateColumnIfNotExists("Teams", "Description", "varchar(255)", "varchar(255)", "")

		// Add a Position column to users.
		sqlStore.CreateColumnIfNotExists("Users", "Position", "varchar(64)", "varchar(64)", "")

		// Remove ActiveChannel column from Status
		sqlStore.RemoveColumnIfExists("Status", "ActiveChannel")

		saveSchemaVersion(sqlStore, VERSION_3_6_0)
	}
}

func UpgradeDatabaseToVersion37(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_3_6_0, VERSION_3_7_0) {
		// Add EditAt column to Posts
		sqlStore.CreateColumnIfNotExists("Posts", "EditAt", " bigint", " bigint", "0")

		saveSchemaVersion(sqlStore, VERSION_3_7_0)
	}
}

func UpgradeDatabaseToVersion38(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_3_7_0, VERSION_3_8_0) {
		// Add the IsPinned column to posts.
		sqlStore.CreateColumnIfNotExists("Posts", "IsPinned", "boolean", "boolean", "0")

		saveSchemaVersion(sqlStore, VERSION_3_8_0)
	}
}

func UpgradeDatabaseToVersion39(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_3_8_0, VERSION_3_9_0) {
		sqlStore.CreateColumnIfNotExists("OAuthAccessData", "Scope", "varchar(128)", "varchar(128)", model.DEFAULT_SCOPE)
		sqlStore.RemoveTableIfExists("PasswordRecovery")

		saveSchemaVersion(sqlStore, VERSION_3_9_0)
	}
}

func UpgradeDatabaseToVersion310(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_3_9_0, VERSION_3_10_0) {
		saveSchemaVersion(sqlStore, VERSION_3_10_0)
	}
}

func UpgradeDatabaseToVersion40(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_3_10_0, VERSION_4_0_0) {
		saveSchemaVersion(sqlStore, VERSION_4_0_0)
	}
}

func UpgradeDatabaseToVersion41(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_4_0_0, VERSION_4_1_0) {
		// Increase maximum length of the Users table Roles column.
		if sqlStore.GetMaxLengthOfColumnIfExists("Users", "Roles") != "256" {
			sqlStore.AlterColumnTypeIfExists("Users", "Roles", "varchar(256)", "varchar(256)")
		}

		sqlStore.RemoveTableIfExists("JobStatuses")

		saveSchemaVersion(sqlStore, VERSION_4_1_0)
	}
}

func UpgradeDatabaseToVersion42(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_4_1_0, VERSION_4_2_0) {
		saveSchemaVersion(sqlStore, VERSION_4_2_0)
	}
}

func UpgradeDatabaseToVersion43(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_4_2_0, VERSION_4_3_0) {
		saveSchemaVersion(sqlStore, VERSION_4_3_0)
	}
}

func UpgradeDatabaseToVersion44(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_4_3_0, VERSION_4_4_0) {
		// Add the IsActive column to UserAccessToken.
		sqlStore.CreateColumnIfNotExists("UserAccessTokens", "IsActive", "boolean", "boolean", "1")

		saveSchemaVersion(sqlStore, VERSION_4_4_0)
	}
}

func UpgradeDatabaseToVersion45(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_4_4_0, VERSION_4_5_0) {
		saveSchemaVersion(sqlStore, VERSION_4_5_0)
	}
}

func UpgradeDatabaseToVersion46(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_4_5_0, VERSION_4_6_0) {
		sqlStore.CreateColumnIfNotExists("IncomingWebhooks", "Username", "varchar(64)", "varchar(64)", "")
		sqlStore.CreateColumnIfNotExists("IncomingWebhooks", "IconURL", "varchar(1024)", "varchar(1024)", "")
		saveSchemaVersion(sqlStore, VERSION_4_6_0)
	}
}

func UpgradeDatabaseToVersion47(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_4_6_0, VERSION_4_7_0) {
		sqlStore.AlterColumnTypeIfExists("Users", "Position", "varchar(128)", "varchar(128)")
		sqlStore.AlterColumnTypeIfExists("OAuthAuthData", "State", "varchar(1024)", "varchar(1024)")
		sqlStore.RemoveColumnIfExists("ChannelMemberHistory", "Email")
		sqlStore.RemoveColumnIfExists("ChannelMemberHistory", "Username")
		saveSchemaVersion(sqlStore, VERSION_4_7_0)
	}
}

// If any new instances started with 4.7, they would have the bad Email column on the
// ChannelMemberHistory table. So for those cases we need to do an upgrade between
// 4.7.0 and 4.7.1
func UpgradeDatabaseToVersion471(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_4_7_0, VERSION_4_7_1) {
		sqlStore.RemoveColumnIfExists("ChannelMemberHistory", "Email")
		saveSchemaVersion(sqlStore, VERSION_4_7_1)
	}
}

func UpgradeDatabaseToVersion472(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_4_7_1, VERSION_4_7_2) {
		sqlStore.RemoveIndexIfExists("idx_channels_displayname", "Channels")
		saveSchemaVersion(sqlStore, VERSION_4_7_2)
	}
}

func UpgradeDatabaseToVersion48(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_4_7_2, VERSION_4_8_0) {
		saveSchemaVersion(sqlStore, VERSION_4_8_0)
	}
}

func UpgradeDatabaseToVersion481(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_4_8_0, VERSION_4_8_1) {
		sqlStore.RemoveIndexIfExists("idx_channels_displayname", "Channels")
		saveSchemaVersion(sqlStore, VERSION_4_8_1)
	}
}

func UpgradeDatabaseToVersion49(sqlStore SqlStore) {
	// This version of Mattermost includes an App-Layer migration which migrates from hard-coded roles configured by
	// a number of parameters in `config.json` to a `Roles` table in the database. The migration code can be seen
	// in the file `app/app.go` in the function `DoAdvancedPermissionsMigration()`.

	if shouldPerformUpgrade(sqlStore, VERSION_4_8_1, VERSION_4_9_0) {
		sqlStore.CreateColumnIfNotExists("Teams", "LastTeamIconUpdate", "bigint", "bigint", "0")
		defaultTimezone := model.DefaultUserTimezone()
		defaultTimezoneValue, err := json.Marshal(defaultTimezone)
		if err != nil {
			mlog.Critical(fmt.Sprint(err))
		}
		sqlStore.CreateColumnIfNotExists("Users", "Timezone", "varchar(256)", "varchar(256)", string(defaultTimezoneValue))
		sqlStore.RemoveIndexIfExists("idx_channels_displayname", "Channels")
		saveSchemaVersion(sqlStore, VERSION_4_9_0)
	}
}

func UpgradeDatabaseToVersion410(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_4_9_0, VERSION_4_10_0) {

		sqlStore.RemoveIndexIfExists("Name_2", "Channels")
		sqlStore.RemoveIndexIfExists("Name_2", "Emoji")
		sqlStore.RemoveIndexIfExists("ClientId_2", "OAuthAccessData")

		saveSchemaVersion(sqlStore, VERSION_4_10_0)
		sqlStore.GetMaster().Exec("UPDATE Users SET AuthData=LOWER(AuthData) WHERE AuthService = 'saml'")
	}
}

func UpgradeDatabaseToVersion50(sqlStore SqlStore) {
	// This version of Mattermost includes an App-Layer migration which migrates from hard-coded emojis configured
	// in `config.json` to a `Permission` in the database. The migration code can be seen
	// in the file `app/app.go` in the function `DoEmojisPermissionsMigration()`.

	// This version of Mattermost also includes a online-migration which migrates some roles from the `Roles` columns of
	// TeamMember and ChannelMember rows to the new SchemeAdmin and SchemeUser columns. If you need to downgrade to a
	// version of Mattermost prior to 5.0, you should take your server offline and run the following SQL statements
	// prior to launching the downgraded version:
	//
	//    UPDATE Teams SET SchemeId = NULL;
	//    UPDATE Channels SET SchemeId = NULL;
	//    UPDATE TeamMembers SET Roles = CONCAT(Roles, ' team_user'), SchemeUser = NULL where SchemeUser = 1;
	//    UPDATE TeamMembers SET Roles = CONCAT(Roles, ' team_admin'), SchemeAdmin = NULL where SchemeAdmin = 1;
	//    UPDATE ChannelMembers SET Roles = CONCAT(Roles, ' channel_user'), SchemeUser = NULL where SchemeUser = 1;
	//    UPDATE ChannelMembers SET Roles = CONCAT(Roles, ' channel_admin'), SchemeAdmin = NULL where SchemeAdmin = 1;
	//    DELETE from Systems WHERE Name = 'migration_advanced_permissions_phase_2';

	if shouldPerformUpgrade(sqlStore, VERSION_4_10_0, VERSION_5_0_0) {

		sqlStore.CreateColumnIfNotExistsNoDefault("Teams", "SchemeId", "varchar(26)", "varchar(26)")
		sqlStore.CreateColumnIfNotExistsNoDefault("Channels", "SchemeId", "varchar(26)", "varchar(26)")

		sqlStore.CreateColumnIfNotExistsNoDefault("TeamMembers", "SchemeUser", "boolean", "boolean")
		sqlStore.CreateColumnIfNotExistsNoDefault("TeamMembers", "SchemeAdmin", "boolean", "boolean")
		sqlStore.CreateColumnIfNotExistsNoDefault("ChannelMembers", "SchemeUser", "boolean", "boolean")
		sqlStore.CreateColumnIfNotExistsNoDefault("ChannelMembers", "SchemeAdmin", "boolean", "boolean")

		sqlStore.CreateColumnIfNotExists("Roles", "BuiltIn", "boolean", "boolean", "0")
		sqlStore.GetMaster().Exec("UPDATE Roles SET BuiltIn=true")
		sqlStore.GetMaster().Exec("UPDATE Roles SET SchemeManaged=false WHERE Name NOT IN ('system_user', 'system_admin', 'team_user', 'team_admin', 'channel_user', 'channel_admin')")
		sqlStore.CreateColumnIfNotExists("IncomingWebhooks", "ChannelLocked", "boolean", "boolean", "0")

		sqlStore.RemoveIndexIfExists("idx_channels_txt", "Channels")

		saveSchemaVersion(sqlStore, VERSION_5_0_0)
	}
}

func UpgradeDatabaseToVersion51(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_5_0_0, VERSION_5_1_0) {
		saveSchemaVersion(sqlStore, VERSION_5_1_0)
	}
}

func UpgradeDatabaseToVersion52(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_5_1_0, VERSION_5_2_0) {
		sqlStore.CreateColumnIfNotExists("OutgoingWebhooks", "Username", "varchar(64)", "varchar(64)", "")
		sqlStore.CreateColumnIfNotExists("OutgoingWebhooks", "IconURL", "varchar(1024)", "varchar(1024)", "")
		saveSchemaVersion(sqlStore, VERSION_5_2_0)
	}
}

func UpgradeDatabaseToVersion53(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_5_2_0, VERSION_5_3_0) {
		saveSchemaVersion(sqlStore, VERSION_5_3_0)
	}
}

func UpgradeDatabaseToVersion54(sqlStore SqlStore) {
	if shouldPerformUpgrade(sqlStore, VERSION_5_3_0, VERSION_5_4_0) {
		sqlStore.AlterColumnTypeIfExists("OutgoingWebhooks", "Description", "varchar(500)", "varchar(500)")
		sqlStore.AlterColumnTypeIfExists("IncomingWebhooks", "Description", "varchar(500)", "varchar(500)")
		if err := sqlStore.Channel().MigratePublicChannels(); err != nil {
			mlog.Critical("Failed to migrate PublicChannels table", mlog.Err(err))
			time.Sleep(time.Second)
			os.Exit(EXIT_GENERIC_FAILURE)
		}
		sqlStore.CreateColumnIfNotExists("Users", "AcceptedTermsOfServiceId", "varchar(64)", "varchar(64)", "")
		saveSchemaVersion(sqlStore, VERSION_5_4_0)
	}
}

func UpgradeDatabaseToVersion55(sqlStore SqlStore) {
	// TODO: Uncomment following condition when version 5.5.0 is released
	// if shouldPerformUpgrade(sqlStore, VERSION_5_4_0, VERSION_5_5_0) {
	sqlStore.CreateColumnIfNotExists("PluginKeyValueStore", "ExpireAt", "bigint(20)", "bigint", "0")
	// 	saveSchemaVersion(sqlStore, VERSION_5_5_0)
	// }
}