Rename db files to match model names

- users.go -> virtual_users.go
- domains.go -> virtual_domains.go
- aliases.go -> virtual_aliases.go

backend/internal/db/virtual_aliases.go

@@ -0,0 +1,78 @@
+package db
+
+func (d *DB) GetAllAliases() ([]AliasWithDomain, error) {
+	var aliases []VirtualAlias
+	if err := d.Preload("Domain").Find(&aliases).Error; err != nil {
+		return nil, err
+	}
+
+	result := make([]AliasWithDomain, len(aliases))
+	for i, a := range aliases {
+		result[i] = AliasWithDomain{
+			VirtualAlias: a,
+			DomainName:   "",
+		}
+		if a.Domain != nil {
+			result[i].DomainName = a.Domain.Name
+		}
+	}
+
+	if result == nil {
+		result = []AliasWithDomain{}
+	}
+	return result, nil
+}
+
+func (d *DB) GetAliasesByDomain(domainID uint) ([]VirtualAlias, error) {
+	var aliases []VirtualAlias
+	if err := d.Where("domain_id = ?", domainID).Find(&aliases).Error; err != nil {
+		return nil, err
+	}
+	if aliases == nil {
+		aliases = []VirtualAlias{}
+	}
+	return aliases, nil
+}
+
+func (d *DB) GetAliasByID(id uint) (*VirtualAlias, error) {
+	var alias VirtualAlias
+	if err := d.Preload("Domain").First(&alias, id).Error; err != nil {
+		return nil, err
+	}
+	return &alias, nil
+}
+
+func (d *DB) GetAliasBySource(source string) (*VirtualAlias, error) {
+	var alias VirtualAlias
+	if err := d.Where("source = ?", source).First(&alias).Error; err != nil {
+		return nil, err
+	}
+	return &alias, nil
+}
+
+func (d *DB) CreateAlias(source, destination string) (*VirtualAlias, error) {
+	alias := VirtualAlias{
+		Source:      source,
+		Destination: destination,
+	}
+	if err := d.Create(&alias).Error; err != nil {
+		return nil, err
+	}
+	return &alias, nil
+}
+
+func (d *DB) CreateAliasInDomain(source, destination string, domainID uint) (*VirtualAlias, error) {
+	alias := VirtualAlias{
+		DomainID:    domainID,
+		Source:      source,
+		Destination: destination,
+	}
+	if err := d.Create(&alias).Error; err != nil {
+		return nil, err
+	}
+	return &alias, nil
+}
+
+func (d *DB) DeleteAlias(id uint) error {
+	return d.Delete(&VirtualAlias{}, id).Error
+}