mirror of
https://github.com/wgh136/nysoure.git
synced 2025-09-27 12:17:24 +00:00
412 lines
10 KiB
Go
412 lines
10 KiB
Go
package dao
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import (
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"errors"
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"github.com/gofiber/fiber/v3/log"
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"nysoure/server/model"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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"gorm.io/gorm"
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)
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func CreateResource(r model.Resource) (model.Resource, error) {
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err := db.Transaction(func(tx *gorm.DB) error {
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err := tx.Create(&r).Error
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if err != nil {
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return err
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}
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if err := tx.Model(&model.User{}).Where("id = ?", r.UserID).Update("uploads_count", gorm.Expr("uploads_count + ?", 1)).Error; err != nil {
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return err
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}
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return nil
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})
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if err != nil {
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return model.Resource{}, err
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}
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return r, nil
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}
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func GetResourceByID(id uint) (model.Resource, error) {
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// Retrieve a resource by its ID from the database
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var r model.Resource
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if err := db.Preload("User").Preload("Images").Preload("Tags").Preload("Files").First(&r, id).Error; err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return model.Resource{}, model.NewNotFoundError("Resource not found")
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}
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return model.Resource{}, err
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}
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return r, nil
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}
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func GetResourceList(page, pageSize int, sort model.RSort) ([]model.Resource, int, error) {
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// Retrieve a list of resources with pagination
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var resources []model.Resource
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var total int64
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if err := db.Model(&model.Resource{}).Count(&total).Error; err != nil {
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return nil, 0, err
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}
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order := ""
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switch sort {
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case model.RSortTimeAsc:
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order = "created_at ASC"
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case model.RSortTimeDesc:
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order = "created_at DESC"
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case model.RSortViewsAsc:
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order = "views ASC"
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case model.RSortViewsDesc:
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order = "views DESC"
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case model.RSortDownloadsAsc:
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order = "downloads ASC"
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case model.RSortDownloadsDesc:
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order = "downloads DESC"
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default:
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order = "created_at DESC" // Default sort order
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}
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if err := db.Offset((page - 1) * pageSize).Limit(pageSize).Preload("User").Preload("Images").Preload("Tags").Order(order).Find(&resources).Error; err != nil {
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return nil, 0, err
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}
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totalPages := (total + int64(pageSize) - 1) / int64(pageSize)
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return resources, int(totalPages), nil
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}
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func UpdateResource(r model.Resource) error {
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// Update a resource in the database
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images := r.Images
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tags := r.Tags
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r.Images = nil
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r.Tags = nil
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if err := db.Save(&r).Error; err != nil {
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return err
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}
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if err := db.Model(&r).Association("Images").Replace(images); err != nil {
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return err
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}
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if err := db.Model(&r).Association("Tags").Replace(tags); err != nil {
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return err
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}
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return nil
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}
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func DeleteResource(id uint) error {
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return db.Transaction(func(tx *gorm.DB) error {
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var r model.Resource
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if err := tx.Where("id = ?", id).First(&r).Error; err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return model.NewNotFoundError("Resource not found")
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}
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return err
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}
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if err := tx.Model(&model.User{}).Where("id = ?", r.UserID).Update("uploads_count", gorm.Expr("uploads_count - ?", 1)).Error; err != nil {
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return err
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}
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if err := tx.Delete(&r).Error; err != nil {
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return err
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}
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return nil
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})
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}
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func Search(query string, page, pageSize int) ([]model.Resource, int, error) {
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query = strings.TrimSpace(query)
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keywords := strings.Split(query, " ")
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resource, err := searchWithKeyword(keywords[0])
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if err != nil {
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return nil, 0, err
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}
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if len(keywords) > 1 {
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for _, keyword := range keywords[1:] {
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r := make([]model.Resource, 0, len(resource))
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for _, res := range resource {
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if strings.Contains(res.Title, keyword) {
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r = append(r, res)
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continue
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}
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ok := false
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for _, at := range res.AlternativeTitles {
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if strings.Contains(at, keyword) {
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r = append(r, res)
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ok = true
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break
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}
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}
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if ok {
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continue
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}
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for _, tag := range res.Tags {
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if tag.Name == keyword {
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r = append(r, res)
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ok = true
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break
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}
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}
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}
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resource = r
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}
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}
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startIndex := (page - 1) * pageSize
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endIndex := startIndex + pageSize
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if startIndex > len(resource) {
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return nil, 0, nil
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}
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if endIndex > len(resource) {
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endIndex = len(resource)
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}
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totalPages := (len(resource) + pageSize - 1) / pageSize
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result := make([]model.Resource, 0, endIndex-startIndex)
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for i := startIndex; i < endIndex; i++ {
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var r model.Resource
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if err := db.Model(&r).Preload("User").Preload("Images").Preload("Tags").Where("id=?", resource[i].ID).First(&r).Error; err != nil {
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return nil, 0, err
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}
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result = append(result, r)
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}
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return result, totalPages, nil
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}
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func searchWithKeyword(keyword string) ([]model.Resource, error) {
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if len(keyword) == 0 {
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return nil, nil
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}
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if len([]rune(keyword)) < 20 {
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var tag model.Tag
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var err error
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if tag, err = GetTagByName(keyword); err != nil {
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if !errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, err
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}
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} else {
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if tag.AliasOf != nil {
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tag, err = GetTagByID(*tag.AliasOf)
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if err != nil {
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return nil, err
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}
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}
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var tagIds []uint
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tagIds = append(tagIds, tag.ID)
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for _, alias := range tag.Aliases {
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tagIds = append(tagIds, alias.ID)
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}
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var resources []model.Resource
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subQuery := db.Table("resource_tags").
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Select("resource_id").
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Where("tag_id IN ?", tagIds).
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Group("resource_id")
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if err := db.Where("id IN (?)", subQuery).Select("id", "title", "alternative_titles").Preload("Tags").Find(&resources).Error; err != nil {
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return nil, err
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}
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return resources, nil
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}
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}
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if len([]rune(keyword)) < 80 {
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var resources []model.Resource
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if err := db.Where("title LIKE ?", "%"+keyword+"%").Or("alternative_titles LIKE ?", "%"+keyword+"%").Select("id", "title", "alternative_titles").Preload("Tags").Find(&resources).Error; err != nil {
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return nil, err
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}
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return resources, nil
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}
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return nil, model.NewRequestError("Keyword too long")
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}
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func GetResourceByTag(tagID uint, page int, pageSize int) ([]model.Resource, int, error) {
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tag, err := GetTagByID(tagID)
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if err != nil {
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return nil, 0, err
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}
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if tag.AliasOf != nil {
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tag, err = GetTagByID(*tag.AliasOf)
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if err != nil {
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return nil, 0, err
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}
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}
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var tagIds []uint
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tagIds = append(tagIds, tag.ID)
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for _, alias := range tag.Aliases {
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tagIds = append(tagIds, alias.ID)
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}
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var resources []model.Resource
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var total int64
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subQuery := db.Table("resource_tags").
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Select("resource_id").
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Where("tag_id IN ?", tagIds).
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Group("resource_id")
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if err := db.Model(&model.Resource{}).
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Where("id IN (?)", subQuery).
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Count(&total).Error; err != nil {
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return nil, 0, err
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}
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if err := db.Where("id IN (?)", subQuery).
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Offset((page - 1) * pageSize).
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Limit(pageSize).
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Preload("User").
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Preload("Images").
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Preload("Tags").
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Preload("Files").
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Order("created_at DESC").
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Find(&resources).Error; err != nil {
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return nil, 0, err
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}
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totalPages := (total + int64(pageSize) - 1) / int64(pageSize)
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return resources, int(totalPages), nil
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}
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func ExistsResource(id uint) (bool, error) {
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var r model.Resource
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if err := db.Model(&model.Resource{}).Where("id = ?", id).First(&r).Error; err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return false, nil
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}
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return false, err
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}
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return true, nil
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}
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func GetResourcesByUsername(username string, page, pageSize int) ([]model.Resource, int, error) {
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var user model.User
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if err := db.Where("username = ?", username).First(&user).Error; err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, 0, model.NewNotFoundError("User not found")
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}
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return nil, 0, err
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}
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var resources []model.Resource
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var total int64
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if err := db.Model(&model.Resource{}).Where("user_id = ?", user.ID).Count(&total).Error; err != nil {
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return nil, 0, err
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}
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if err := db.Model(&model.Resource{}).Where("user_id = ?", user.ID).Offset((page - 1) * pageSize).Limit(pageSize).Preload("User").Preload("Images").Preload("Tags").Order("created_at DESC").Find(&resources).Error; err != nil {
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return nil, 0, err
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}
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totalPages := (total + int64(pageSize) - 1) / int64(pageSize)
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return resources, int(totalPages), nil
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}
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// GetAllResources retrieves all resources from the database without all related data.
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// It is used to generate a sitemap and rss feed.
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func GetAllResources() ([]model.Resource, error) {
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var resources []model.Resource
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if err := db.Find(&resources).Error; err != nil {
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return nil, err
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}
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return resources, nil
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}
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type CachedResourceStats struct {
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id uint
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views atomic.Int64
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downloads atomic.Int64
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}
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var (
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cachedResourcesStats = make(map[uint]*CachedResourceStats)
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cacheMutex = sync.RWMutex{}
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)
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func init() {
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go func() {
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ticker := time.NewTicker(10 * time.Minute)
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defer ticker.Stop()
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for range ticker.C {
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cacheMutex.Lock()
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if len(cachedResourcesStats) == 0 {
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cacheMutex.Unlock()
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continue
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}
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err := db.Transaction(func(tx *gorm.DB) error {
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for id, stats := range cachedResourcesStats {
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var count int64
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if err := tx.Model(&model.Resource{}).Where("id = ?", id).Count(&count).Error; err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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log.Warnf("Resource with ID %d not found, skipping stats update", id)
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continue
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}
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return err
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}
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if count == 0 {
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continue
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}
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if views := stats.views.Swap(0); views > 0 {
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if err := tx.Model(&model.Resource{}).Where("id = ?", id).Update("views", gorm.Expr("views + ?", views)).Error; err != nil {
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return err
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}
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}
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if downloads := stats.downloads.Swap(0); downloads > 0 {
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if err := tx.Model(&model.Resource{}).Where("id = ?", id).Update("downloads", gorm.Expr("downloads + ?", downloads)).Error; err != nil {
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return err
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}
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}
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}
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return nil
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})
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if err != nil {
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log.Error("Failed to update resource stats cache: ", err)
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}
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clear(cachedResourcesStats)
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cacheMutex.Unlock()
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}
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}()
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}
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func AddResourceViewCount(id uint) error {
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cacheMutex.RLock()
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stats, exists := cachedResourcesStats[id]
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cacheMutex.RUnlock()
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if !exists {
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cacheMutex.Lock()
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stats, exists = cachedResourcesStats[id]
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if !exists {
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stats = &CachedResourceStats{id: id}
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cachedResourcesStats[id] = stats
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}
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cacheMutex.Unlock()
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}
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stats.views.Add(1)
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return nil
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}
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func AddResourceDownloadCount(id uint) error {
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cacheMutex.RLock()
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stats, exists := cachedResourcesStats[id]
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cacheMutex.RUnlock()
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if !exists {
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cacheMutex.Lock()
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stats, exists = cachedResourcesStats[id]
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if !exists {
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stats = &CachedResourceStats{id: id}
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cachedResourcesStats[id] = stats
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}
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cacheMutex.Unlock()
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}
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stats.downloads.Add(1)
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return nil
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}
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