精简后的项目：仅保留 api/ui 源码、文档、构建依赖

api/graphql/models/site_info.go

@@ -0,0 +1,52 @@
+package models
+
+import (
+	db_drivers "github.com/photoview/photoview/api/database/drivers"
+	"github.com/pkg/errors"
+	"gorm.io/gorm"
+)
+
+type SiteInfo struct {
+	InitialSetup         bool `gorm:"not null"`
+	PeriodicScanInterval int  `gorm:"not null"`
+	ConcurrentWorkers    int  `gorm:"not null"`
+}
+
+func (SiteInfo) TableName() string {
+	return "site_info"
+}
+
+func DefaultSiteInfo(db *gorm.DB) SiteInfo {
+	defaultConcurrentWorkers := 3
+	if db_drivers.SQLITE.MatchDatabase(db) {
+		defaultConcurrentWorkers = 1
+	}
+
+	return SiteInfo{
+		InitialSetup:         true,
+		PeriodicScanInterval: 0,
+		ConcurrentWorkers:    defaultConcurrentWorkers,
+	}
+}
+
+// GetSiteInfo gets the site info row from the database, and creates it if it does not exist
+func GetSiteInfo(db *gorm.DB) (*SiteInfo, error) {
+
+	var siteInfo []*SiteInfo
+
+	if err := db.Limit(1).Find(&siteInfo).Error; err != nil {
+		return nil, errors.Wrap(err, "get site info from database")
+	}
+
+	if len(siteInfo) == 0 {
+		newSiteInfo := DefaultSiteInfo(db)
+
+		if err := db.Create(&newSiteInfo).Error; err != nil {
+			return nil, errors.Wrap(err, "initialize site_info")
+		}
+
+		return &newSiteInfo, nil
+	} else {
+		return siteInfo[0], nil
+	}
+}