Fix struct tag with spaces as values (#36)

internal/code/extractor.go

@@ -3,6 +3,7 @@ package code
 import (
 	"fmt"
 	"go/ast"
+	"reflect"
 	"strconv"
 	"strings"
 )
@@ -60,7 +61,7 @@ func extractStructType(name string, structType *ast.StructType) Struct {
 		}
 		strField.Type = getType(field.Type)
 		if field.Tag != nil {
-			strField.Tags = extractStructTag(field.Tag.Value)
+			strField.Tag = extractStructTag(field.Tag.Value)
 		}
 
 		str.Fields = append(str.Fields, strField)
@@ -103,26 +104,8 @@ func extractInterfaceType(name string, interfaceType *ast.InterfaceType) Interfa
 	return intf
 }
 
-func extractStructTag(tagValue string) map[string][]string {
+func extractStructTag(tagValue string) reflect.StructTag {
-	tagTokens := strings.Fields(tagValue[1 : len(tagValue)-1])
+	return reflect.StructTag(tagValue[1 : len(tagValue)-1])
-
-	tags := make(map[string][]string)
-	for _, tagToken := range tagTokens {
-		colonIndex := strings.Index(tagToken, ":")
-		if colonIndex == -1 {
-			continue
-		}
-		tagKey := tagToken[:colonIndex]
-		tagValue, err := strconv.Unquote(tagToken[colonIndex+1:])
-		if err != nil {
-			fmt.Printf("cannot unquote struct tag %s : %s\n", tagToken[colonIndex+1:], err)
-			continue
-		}
-		tagValues := strings.Split(tagValue, ",")
-		tags[tagKey] = tagValues
-	}
-
-	return tags
 }
 
 func extractFunction(name string, comments []string, funcType *ast.FuncType) Method {

internal/code/extractor_test.go

@@ -61,6 +61,7 @@ import (
 type UserModel struct {
 	ID       primitive.ObjectID ` + "`bson:\"_id,omitempty\" json:\"id\"`" + `
 	Username string             ` + "`bson:\"username\" json:\"username\"`" + `
+	Password string             ` + "`bson:\"password\" json:\"-\" note:\"This should be hidden.\"`" + `
 }`,
 			ExpectedOutput: code.File{
 				PackageName: "user",
@@ -71,18 +72,17 @@ type UserModel struct {
 							code.StructField{
 								Name: "ID",
 								Type: code.ExternalType{PackageAlias: "primitive", Name: "ObjectID"},
-								Tags: map[string][]string{
+								Tag:  `bson:"_id,omitempty" json:"id"`,
-									"bson": {"_id", "omitempty"},
-									"json": {"id"},
-								},
 							},
 							code.StructField{
 								Name: "Username",
 								Type: code.TypeString,
-								Tags: map[string][]string{
+								Tag:  `bson:"username" json:"username"`,
-									"bson": {"username"},
-									"json": {"username"},
 							},
+							code.StructField{
+								Name: "Password",
+								Type: code.TypeString,
+								Tag:  `bson:"password" json:"-" note:"This should be hidden."`,
 							},
 						},
 					},
@@ -268,18 +268,12 @@ type UserRepository interface {
 							code.StructField{
 								Name: "ID",
 								Type: code.ExternalType{PackageAlias: "primitive", Name: "ObjectID"},
-								Tags: map[string][]string{
+								Tag:  `bson:"_id,omitempty" json:"id"`,
-									"bson": {"_id", "omitempty"},
-									"json": {"id"},
-								},
 							},
 							code.StructField{
 								Name: "Username",
 								Type: code.TypeString,
-								Tags: map[string][]string{
+								Tag:  `bson:"username" json:"username"`,
-									"bson": {"username"},
-									"json": {"username"},
-								},
 							},
 						},
 					},

internal/code/models.go

@@ -2,6 +2,7 @@ package code
 
 import (
 	"fmt"
+	"reflect"
 )
 
 // File is a container of all required components for code generation in the file
@@ -46,7 +47,7 @@ func (fields StructFields) ByName(name string) (StructField, bool) {
 type StructField struct {
 	Name string
 	Type Type
-	Tags map[string][]string
+	Tag  reflect.StructTag
 }
 
 // InterfaceType is a definition of the interface

internal/codegen/builder_test.go

@@ -62,10 +62,7 @@ func TestBuilderBuild(t *testing.T) {
 					PackageAlias: "primitive",
 					Name:         "ObjectID",
 				},
-				Tags: map[string][]string{
+				Tag: `bson:"id" json:"id,omitempty"`,
-					"bson": {"id"},
-					"json": {"id", "omitempty"},
-				},
 			},
 			{
 				Name: "Username",

internal/codegen/struct.go

@@ -3,7 +3,6 @@ package codegen
 import (
 	"bytes"
 	"fmt"
-	"sort"
 	"strings"
 	"text/template"
 
@@ -39,25 +38,10 @@ func (sb StructBuilder) GenFields() string {
 	var fieldLines []string
 	for _, field := range sb.Fields {
 		fieldLine := fmt.Sprintf("\t%s %s", field.Name, field.Type.Code())
-		if len(field.Tags) > 0 {
+		if len(field.Tag) > 0 {
-			fieldLine += fmt.Sprintf(" `%s`", sb.generateStructTag(field.Tags))
+			fieldLine += fmt.Sprintf(" `%s`", string(field.Tag))
 		}
 		fieldLines = append(fieldLines, fieldLine)
 	}
 	return strings.Join(fieldLines, "\n")
 }
-
-func (sb StructBuilder) generateStructTag(tags map[string][]string) string {
-	var tagKeys []string
-	for key := range tags {
-		tagKeys = append(tagKeys, key)
-	}
-	sort.Strings(tagKeys)
-
-	var tagGroups []string
-	for _, key := range tagKeys {
-		tagValue := strings.Join(tags[key], ",")
-		tagGroups = append(tagGroups, fmt.Sprintf("%s:\"%s\"", key, tagValue))
-	}
-	return strings.Join(tagGroups, " ")
-}

internal/codegen/struct_test.go

@@ -28,25 +28,17 @@ func TestStructBuilderBuild(t *testing.T) {
 					PackageAlias: "primitive",
 					Name:         "ObjectID",
 				},
-				Tags: map[string][]string{
+				Tag: `bson:"id,omitempty" json:"id,omitempty"`,
-					"json": {"id", "omitempty"},
-					"bson": {"id", "omitempty"},
-				},
 			},
 			{
 				Name: "Username",
 				Type: code.TypeString,
-				Tags: map[string][]string{
+				Tag:  `bson:"username" json:"username"`,
-					"json": {"username"},
-					"bson": {"username"},
-				},
 			},
 			{
 				Name: "Age",
 				Type: code.TypeInt,
-				Tags: map[string][]string{
+				Tag:  `bson:"age"`,
-					"bson": {"age"},
-				},
 			},
 			{
 				Name: "orderCount",

internal/generator/generator_test.go

@@ -14,17 +14,17 @@ var (
 	idField = code.StructField{
 		Name: "ID",
 		Type: code.ExternalType{PackageAlias: "primitive", Name: "ObjectID"},
-		Tags: map[string][]string{"bson": {"_id", "omitempty"}},
+		Tag:  `bson:"_id,omitempty"`,
 	}
 	genderField = code.StructField{
 		Name: "Gender",
 		Type: code.SimpleType("Gender"),
-		Tags: map[string][]string{"bson": {"gender"}},
+		Tag:  `bson:"gender"`,
 	}
 	ageField = code.StructField{
 		Name: "Age",
 		Type: code.TypeInt,
-		Tags: map[string][]string{"bson": {"age"}},
+		Tag:  `bson:"age"`,
 	}
 )
 
@@ -36,7 +36,7 @@ func TestGenerateMongoRepository(t *testing.T) {
 			code.StructField{
 				Name: "Username",
 				Type: code.TypeString,
-				Tags: map[string][]string{"bson": {"username"}},
+				Tag:  `bson:"username"`,
 			},
 			genderField,
 			ageField,

internal/mongo/common.go

@@ -63,12 +63,13 @@ func (g baseMethodGenerator) bsonFieldReference(fieldReference spec.FieldReferen
 }
 
 func (g baseMethodGenerator) bsonTagFromField(field code.StructField) (string, error) {
-	bsonTag, ok := field.Tags["bson"]
+	bsonTag, ok := field.Tag.Lookup("bson")
 	if !ok {
 		return "", NewBsonTagNotFoundError(field.Name)
 	}
 
-	return bsonTag[0], nil
+	documentKey := strings.Split(bsonTag, ",")[0]
+	return documentKey, nil
 }
 
 func (g baseMethodGenerator) convertQuerySpec(query spec.QuerySpec) (querySpec, error) {

internal/mongo/generator_test.go

@@ -15,37 +15,37 @@ var (
 	idField = code.StructField{
 		Name: "ID",
 		Type: code.ExternalType{PackageAlias: "primitive", Name: "ObjectID"},
-		Tags: map[string][]string{"bson": {"_id", "omitempty"}},
+		Tag:  `bson:"_id,omitempty"`,
 	}
 	genderField = code.StructField{
 		Name: "Gender",
 		Type: code.SimpleType("Gender"),
-		Tags: map[string][]string{"bson": {"gender"}},
+		Tag:  `bson:"gender"`,
 	}
 	ageField = code.StructField{
 		Name: "Age",
 		Type: code.TypeInt,
-		Tags: map[string][]string{"bson": {"age"}},
+		Tag:  `bson:"age"`,
 	}
 	nameField = code.StructField{
 		Name: "Name",
 		Type: code.SimpleType("NameModel"),
-		Tags: map[string][]string{"bson": {"name"}},
+		Tag:  `bson:"name"`,
 	}
 	referrerField = code.StructField{
 		Name: "Referrer",
 		Type: code.PointerType{ContainedType: code.SimpleType("UserModel")},
-		Tags: map[string][]string{"bson": {"referrer"}},
+		Tag:  `bson:"referrer"`,
 	}
 	consentHistoryField = code.StructField{
 		Name: "ConsentHistory",
 		Type: code.ArrayType{ContainedType: code.SimpleType("ConsentHistory")},
-		Tags: map[string][]string{"bson": {"consent_history"}},
+		Tag:  `bson:"consent_history"`,
 	}
 	enabledField = code.StructField{
 		Name: "Enabled",
 		Type: code.TypeBool,
-		Tags: map[string][]string{"bson": {"enabled"}},
+		Tag:  `bson:"enabled"`,
 	}
 	accessTokenField = code.StructField{
 		Name: "AccessToken",
@@ -55,7 +55,7 @@ var (
 	firstNameField = code.StructField{
 		Name: "First",
 		Type: code.TypeString,
-		Tags: map[string][]string{"bson": {"first"}},
+		Tag:  `bson:"first"`,
 	}
 )
 
@@ -66,7 +66,7 @@ var userModel = code.Struct{
 		code.StructField{
 			Name: "Username",
 			Type: code.TypeString,
-			Tags: map[string][]string{"bson": {"username"}},
+			Tag:  `bson:"username"`,
 		},
 		genderField,
 		ageField,