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factories.go
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factories.go
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package di
import (
"go/ast"
"slices"
"strings"
)
type RootContainerDefinition struct {
Name string
Package string
Imports map[string]*ImportDefinition
Services []*ServiceDefinition
Containers []*ContainerDefinition
}
func (c RootContainerDefinition) GetImport(s *ServiceDefinition) string {
imp := c.Imports[s.Type.Package]
if imp == nil {
return ""
}
return imp.String()
}
type ImportDefinition struct {
ID string
Name string
Path string
}
func (d ImportDefinition) String() string {
if d.Name != "" {
return d.Name + " " + d.Path
}
return d.Path
}
type ServiceDefinition struct {
Prefix string
Name string
Type TypeDefinition
FactoryFileName string // "factory-file" tag
HasSetter bool // "set" tag - will generate setters for internal and public containers
HasCloser bool // "close" tag - generate closer method call
IsRequired bool // "required" tag - will generate argument for public container constructor
IsPublic bool // "public" tag - will generate getter for public container
IsExternal bool // "external" tag - no definition, panic if empty, force public setter
}
func (s ServiceDefinition) Title() string {
return strings.Title(s.Name)
}
func newServiceDefinition(field *ast.Field, typeDef TypeDefinition) *ServiceDefinition {
name := parseFieldName(field)
tags := parseFieldTags(field)
definition := &ServiceDefinition{
Name: name,
Type: typeDef,
FactoryFileName: tags.FactoryFilename,
}
if definition.FactoryFileName != "" {
definition.FactoryFileName += ".go"
}
for _, option := range tags.Options {
switch option {
case "set":
definition.HasSetter = true
case "close":
definition.HasCloser = true
case "required":
definition.IsRequired = true
case "public":
definition.IsPublic = true
case "external":
definition.IsExternal = true
}
}
return definition
}
type ContainerDefinition struct {
Name string
Type TypeDefinition
Services []*ServiceDefinition
}
func (c ContainerDefinition) Title() string {
return strings.Title(c.Name)
}
type TypeDefinition struct {
IsPointer bool
Package string
Name string
}
var basicTypes = []string{
"string",
"int",
"uint",
"uint8",
"uint16",
"uint32",
"uint64",
"int8",
"int16",
"int32",
"int64",
"float32",
"float64",
"bool",
}
func (d TypeDefinition) IsBasicType() bool {
return d.Package == "" && slices.Contains(basicTypes, d.Name)
}
func (d TypeDefinition) IsTime() bool {
return d.Package == "time" && d.Name == "Time"
}
func (d TypeDefinition) IsDuration() bool {
return d.Package == "time" && d.Name == "Duration"
}
func (d TypeDefinition) IsURL() bool {
return d.Package == "url" && d.Name == "URL"
}
func (d TypeDefinition) String() string {
var s strings.Builder
if d.IsPointer {
s.WriteString("*")
}
s.WriteString(d.Package)
if d.Package != "" {
s.WriteString(".")
}
s.WriteString(d.Name)
return s.String()
}
func (d TypeDefinition) ZeroComparison() string {
if d.IsPointer {
return " == nil"
}
if d.IsBasicType() {
return d.basicZeroComparison()
}
if d.IsTime() {
return ".IsZero()"
}
if d.IsDuration() {
return " == 0"
}
if d.IsURL() {
return " == url.URL{}"
}
return " == nil"
}
func (d TypeDefinition) basicZeroComparison() string {
switch d.Name {
case "bool":
return " == false"
case "string":
return " == \"\""
case "int", "int8", "int16", "int32", "int64", "uint", "uint8", "uint16", "uint32", "uint64":
return " == 0"
case "float32", "float64":
return " == 0.0"
default:
return " == nil"
}
}
type FactoryFile struct {
Imports map[string]*ImportDefinition
Services []string
}
type Tags struct {
Options []string
FactoryFilename string
}