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segment_history_service.go
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/
segment_history_service.go
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package services
import (
"gorm.io/gorm"
"gorm.io/gorm/clause"
"github.com/caraml-dev/xp/management-service/errors"
"github.com/caraml-dev/xp/management-service/models"
"github.com/caraml-dev/xp/management-service/pagination"
)
type ListSegmentHistoryParams struct {
pagination.PaginationOptions
}
type SegmentHistoryService interface {
ListSegmentHistory(segmentId int64, params ListSegmentHistoryParams) ([]*models.SegmentHistory, *pagination.Paging, error)
GetSegmentHistory(segmentId int64, version int64) (*models.SegmentHistory, error)
CreateSegmentHistory(*models.Segment) (*models.SegmentHistory, error)
GetDBRecord(segmentId models.ID, version int64) (*models.SegmentHistory, error)
DeleteSegmentHistory(segmentId int64) error
}
type segmentHistoryService struct {
db *gorm.DB
}
func NewSegmentHistoryService(db *gorm.DB) SegmentHistoryService {
return &segmentHistoryService{
db: db,
}
}
func (svc *segmentHistoryService) ListSegmentHistory(
segmentId int64,
params ListSegmentHistoryParams,
) ([]*models.SegmentHistory, *pagination.Paging, error) {
var history []*models.SegmentHistory
query := svc.query().
Where("segment_id = ?", segmentId).
Order("updated_at desc")
// Pagination
var pagingResponse *pagination.Paging
var count int64
err := pagination.ValidatePaginationParams(params.Page, params.PageSize)
if err != nil {
return nil, nil, err
}
pageOpts := pagination.NewPaginationOptions(params.Page, params.PageSize)
// Count total
query.Model(&history).Count(&count)
// Add offset and limit
query = query.Offset(int((*pageOpts.Page - 1) * *pageOpts.PageSize))
query = query.Limit(int(*pageOpts.PageSize))
// Format opts into paging response
pagingResponse = pagination.ToPaging(pageOpts, int(count))
if pagingResponse.Page > 1 && pagingResponse.Pages < pagingResponse.Page {
// Invalid query - total pages is less than the requested page
return nil, nil, errors.Newf(errors.BadInput,
"Requested page number %d exceeds total pages: %d.", pagingResponse.Page, pagingResponse.Pages)
}
// Filter segments
err = query.Find(&history).Error
if err != nil {
return nil, nil, err
}
return history, pagingResponse, nil
}
func (svc *segmentHistoryService) GetSegmentHistory(
segmentId int64,
version int64,
) (*models.SegmentHistory, error) {
history, err := svc.GetDBRecord(models.ID(segmentId), version)
if err != nil {
return nil, errors.Newf(errors.NotFound, err.Error())
}
return history, nil
}
func (svc *segmentHistoryService) CreateSegmentHistory(segment *models.Segment) (*models.SegmentHistory, error) {
var history []*models.SegmentHistory
var count int64
// Begin transaction - so that getting the current count and creating the new record are
// done in a single transaction.
tx := svc.db.Begin()
// Get the count of the existing segment history records
svc.query().Where("segment_id = ?", segment.ID).Model(&history).Count(&count)
// Create the new history record
newHistoryRecord, err := svc.save(&models.SegmentHistory{
Model: models.Model{
CreatedAt: segment.UpdatedAt,
},
SegmentID: segment.ID,
Version: count + 1,
Name: segment.Name,
Segment: segment.Segment,
UpdatedBy: segment.UpdatedBy,
})
if err != nil {
return nil, err
}
return newHistoryRecord, tx.Commit().Error
}
func (svc *segmentHistoryService) DeleteSegmentHistory(segmentId int64) error {
query := svc.query().
Where("segment_id = ?", segmentId).
Unscoped().
Delete(models.SegmentHistory{})
if err := query.Error; err != nil {
return err
}
return nil
}
func (svc *segmentHistoryService) GetDBRecord(
segmentId models.ID,
version int64,
) (*models.SegmentHistory, error) {
var history models.SegmentHistory
query := svc.query().
Where("segment_id = ?", segmentId).
Where("version = ?", version).
First(&history)
if err := query.Error; err != nil {
return nil, err
}
return &history, nil
}
func (svc *segmentHistoryService) query() *gorm.DB {
return svc.db
}
func (svc *segmentHistoryService) save(history *models.SegmentHistory) (*models.SegmentHistory, error) {
if err := svc.query().Clauses(clause.OnConflict{
UpdateAll: true,
}).Create(history).Error; err != nil {
return nil, err
}
return svc.GetDBRecord(history.SegmentID, history.Version)
}