0ef8e5a7e1
- Introduced MaterialHandler for managing learning materials and subjects. - Updated router to include routes for public and admin material management. - Enhanced database initialization with material subject and file models. - Implemented seeding logic for material subjects and files. - Updated wire generation to include MaterialHandler and related services.
114 lines
3.7 KiB
Go
114 lines
3.7 KiB
Go
package model
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import (
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"database/sql/driver"
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"encoding/json"
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"time"
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"github.com/google/uuid"
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"gorm.io/gorm"
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)
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// MaterialFileType 文件类型
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type MaterialFileType string
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const (
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MaterialFileTypePDF MaterialFileType = "pdf"
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MaterialFileTypeWord MaterialFileType = "word"
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MaterialFileTypePPT MaterialFileType = "ppt"
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)
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// MaterialStatus 资料状态
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type MaterialStatus string
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const (
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MaterialStatusActive MaterialStatus = "active"
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MaterialStatusInactive MaterialStatus = "inactive"
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)
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// MaterialSubject 学科分类
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type MaterialSubject struct {
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ID string `json:"id" gorm:"type:varchar(36);primaryKey"`
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Name string `json:"name" gorm:"type:varchar(100);not null"`
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Icon string `json:"icon" gorm:"type:varchar(50)"` // MaterialCommunityIcons name
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Color string `json:"color" gorm:"type:varchar(20)"` // 主题色
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Description string `json:"description" gorm:"type:varchar(255)"` // 描述
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SortOrder int `json:"sort_order" gorm:"default:0;index"` // 排序权重
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IsActive bool `json:"is_active" gorm:"default:true;index"` // 是否启用
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CreatedAt time.Time `json:"created_at" gorm:"autoCreateTime"`
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UpdatedAt time.Time `json:"updated_at" gorm:"autoUpdateTime"`
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// 关联
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Materials []MaterialFile `json:"materials,omitempty" gorm:"foreignKey:SubjectID"`
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}
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// BeforeCreate 创建前生成UUID
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func (s *MaterialSubject) BeforeCreate(tx *gorm.DB) error {
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if s.ID == "" {
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s.ID = uuid.New().String()
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}
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return nil
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}
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func (MaterialSubject) TableName() string {
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return "material_subjects"
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}
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// StringArray 字符串数组类型（用于tags）
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type StringArray []string
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// Value 实现 driver.Valuer 接口
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func (a StringArray) Value() (driver.Value, error) {
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if a == nil {
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return nil, nil
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}
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return json.Marshal(a)
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}
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// Scan 实现 sql.Scanner 接口
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func (a *StringArray) Scan(value interface{}) error {
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if value == nil {
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*a = nil
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return nil
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}
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bytes, ok := value.([]byte)
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if !ok {
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return nil
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}
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return json.Unmarshal(bytes, a)
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}
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// MaterialFile 文件资料
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type MaterialFile struct {
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ID string `json:"id" gorm:"type:varchar(36);primaryKey"`
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SubjectID string `json:"subject_id" gorm:"type:varchar(36);index;not null"`
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Title string `json:"title" gorm:"type:varchar(200);not null"`
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Description string `json:"description" gorm:"type:text"`
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FileType MaterialFileType `json:"file_type" gorm:"type:varchar(20);not null;index"`
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FileSize int64 `json:"file_size" gorm:"default:0"` // 文件大小(字节)
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FileURL string `json:"file_url" gorm:"type:text;not null"` // 文件URL
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FileName string `json:"file_name" gorm:"type:varchar(255)"` // 原始文件名
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DownloadCount int `json:"download_count" gorm:"default:0"` // 下载次数
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AuthorID string `json:"author_id" gorm:"type:varchar(36);index"` // 上传者ID
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Tags StringArray `json:"tags" gorm:"type:json"` // 标签
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Status MaterialStatus `json:"status" gorm:"type:varchar(20);default:active;index"` // 状态
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CreatedAt time.Time `json:"created_at" gorm:"autoCreateTime;index"`
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UpdatedAt time.Time `json:"updated_at" gorm:"autoUpdateTime"`
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// 关联
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Subject *MaterialSubject `json:"subject,omitempty" gorm:"foreignKey:SubjectID"`
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Author *User `json:"author,omitempty" gorm:"foreignKey:AuthorID"`
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}
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// BeforeCreate 创建前生成UUID
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func (f *MaterialFile) BeforeCreate(tx *gorm.DB) error {
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if f.ID == "" {
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f.ID = uuid.New().String()
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}
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return nil
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}
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func (MaterialFile) TableName() string {
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return "material_files"
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}
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