dboperations/operations/operations.go

package operations

import (
	"database/sql"
	"git.sxidc.com/service-supports/fslog"
	"gorm.io/gorm"
	"strings"
	"time"
)

type Operations struct {
	initDB       *gorm.DB
	processDB    *gorm.DB
	stopPingChan chan any
}

func NewOperations(dbConfig *DBConfig) (*Operations, error) {
	gormDB, err := newGormDB(dbConfig)
	if err != nil {
		return nil, err
	}

	sqlDB, err := gormDB.DB()
	if err != nil {
		return nil, err
	}

	if dbConfig.MaxConnections == 0 {
		dbConfig.MaxConnections = 50
	}

	if dbConfig.MaxIdleConnections == 0 {
		dbConfig.MaxIdleConnections = 10
	}

	sqlDB.SetMaxOpenConns(dbConfig.MaxConnections)
	sqlDB.SetMaxIdleConns(dbConfig.MaxIdleConnections)

	op := &Operations{
		initDB:       gormDB,
		processDB:    gormDB,
		stopPingChan: make(chan any),
	}

	op.startBeatHeart(sqlDB)

	return op, nil
}

func DestroyOperation(op *Operations) error {
	if op == nil {
		return nil
	}

	if op.initDB == nil {
		return nil
	}

	op.stopBeatHeart()

	return destroyGormDB(op.initDB)
}

func (op *Operations) startBeatHeart(sqlDB *sql.DB) {
	go func() {
		pingTicker := time.NewTicker(time.Minute * 1)
		defer pingTicker.Stop()

		for {
			select {
			case <-op.stopPingChan:
				return
			case <-pingTicker.C:
				err := sqlDB.Ping()
				if err != nil {
					fslog.Error(err)
				}
			}
		}
	}()
}

func (op *Operations) stopBeatHeart() {
	if op.stopPingChan != nil {
		close(op.stopPingChan)
		op.stopPingChan = nil
	}
}

func (op *Operations) BeginTransaction() TransactionDBOperations {
	tx := op.initDB.Begin()
	return &TransactionOperations{
		Operations{
			initDB:    tx,
			processDB: tx,
		},
	}
}

func (op *Operations) NewSession() DBOperations {
	return &Operations{
		initDB:    op.initDB,
		processDB: op.initDB,
	}
}

func (op *Operations) AutoMigrate(tables ...Table) error {
	tx := op.processDB.Begin()

	for _, table := range tables {
		dbModel, err := table.ToDBModel()
		if err != nil {
			tx.Rollback()
			return err
		}

		err = tx.Table(table.TableName).AutoMigrate(dbModel)
		if err != nil {
			tx.Rollback()
			return err
		}
	}

	tx.Commit()

	return nil
}

func (op *Operations) Table(name string, args ...any) DBOperations {
	return &Operations{
		initDB:    op.initDB,
		processDB: op.initDB.Table(name, args...),
	}
}

func (op *Operations) Raw(sql string, values ...any) DBOperations {
	op.processDB = op.processDB.Raw(sql, values...)
	return op
}

func (op *Operations) Select(query string, args ...any) DBOperations {
	op.processDB = op.processDB.Select(query, args...)
	return op
}

func (op *Operations) Joins(query string, args ...any) DBOperations {
	op.processDB = op.processDB.Joins(query, args...)
	return op
}

func (op *Operations) Where(conditions *Conditions) DBOperations {
	op.processDB = conditions.where(op.processDB)
	return op
}

func (op *Operations) Or(conditions *Conditions) DBOperations {
	op.processDB = conditions.or(op.processDB)
	return op
}

func (op *Operations) Having(conditions *Conditions) DBOperations {
	op.processDB = conditions.having(op.processDB)
	return op
}

func (op *Operations) GroupBy(groupBy string) DBOperations {
	op.processDB = op.processDB.Group(groupBy)
	return op
}

func (op *Operations) OrderBy(orderBy string) DBOperations {
	op.processDB = op.processDB.Order(orderBy)
	return op
}

func (op *Operations) Paging(pageNo int, pageSize int) DBOperations {
	if pageNo != 0 && pageSize != 0 {
		offset := -1

		if pageNo == -1 || pageSize == -1 {
			offset = -1
			pageSize = -1
		} else {
			offset = (pageNo - 1) * pageSize
		}

		op.processDB = op.processDB.Offset(offset).Limit(pageSize)
	}

	return op
}

func (op *Operations) Create(tableRow *TableRow) error {
	err := op.processDB.Create(tableRow.ToMap()).Error
	if err != nil {
		if strings.Contains(err.Error(), "SQLSTATE 23505") {
			return ErrDBRecordHasExist
		}

		return err
	}

	return nil
}

func (op *Operations) CreateBatch(tableRows []TableRow) error {
	tableRowMaps := make([]map[string]any, 0)
	for _, tableRow := range tableRows {
		tableRowMaps = append(tableRowMaps, tableRow.ToMap())
	}

	err := op.processDB.Create(tableRowMaps).Error
	if err != nil {
		if strings.Contains(err.Error(), "SQLSTATE 23505") {
			return ErrDBRecordHasExist
		}

		return err
	}

	return nil
}

func (op *Operations) Delete() error {
	return op.processDB.Delete(make(map[string]any)).Error
}

func (op *Operations) Updates(newTableRow *TableRow) error {
	err := op.processDB.Updates(newTableRow.ToMap()).Error
	if err != nil {
		if strings.Contains(err.Error(), "SQLSTATE 23505") {
			return ErrDBRecordHasExist
		}

		return err
	}

	return nil
}

func (op *Operations) UpdatesWithRowsAffected(newTableRow *TableRow) (int64, error) {
	op.processDB = op.processDB.Updates(newTableRow.ToMap())
	if op.processDB.Error != nil {
		return 0, op.processDB.Error
	}

	return op.processDB.RowsAffected, nil
}

func (op *Operations) Rows(pageNo int, pageSize int) ([]TableRow, error) {
	if pageNo != 0 && pageSize != 0 {
		offset := (pageNo - 1) * pageSize
		op.processDB = op.processDB.Offset(offset).Limit(pageSize)
	}

	defer func() {
		op.processDB = op.processDB.Offset(-1).Limit(-1)
	}()

	tableRowMaps := make([]map[string]any, 0)
	err := op.processDB.Scan(&tableRowMaps).Error
	if err != nil {
		return nil, err
	}

	tableRows := make([]TableRow, 0)
	for _, tableRowMap := range tableRowMaps {
		tableRows = append(tableRows, *NewTableRowFromMap(tableRowMap))
	}

	return tableRows, nil
}

func (op *Operations) Row() (*TableRow, error) {
	valueMap := make(map[string]any)
	err := op.processDB.Scan(&valueMap).Error
	if err != nil {
		return nil, err
	}

	if valueMap == nil || len(valueMap) == 0 {
		return nil, ErrDBRecordNotExist
	}

	return NewTableRowFromMap(valueMap), nil
}

func (op *Operations) Count() (int64, error) {
	var count int64
	err := op.processDB.Count(&count).Error
	if err != nil {
		return 0, err
	}

	return count, nil
}

func (op *Operations) CheckExist() (bool, error) {
	var count int64
	err := op.processDB.Count(&count).Error
	if err != nil {
		return false, err
	}

	return count > 0, nil
}

func (op *Operations) CheckHasOnlyOne() (bool, error) {
	var count int64
	err := op.processDB.Count(&count).Error
	if err != nil {
		return false, err
	}

	return count == 1, nil
}