WIP: Restructing auth api and service

Signed-off-by: Asai Neko <sugar@sne.moe>

service/service_auth/exchange.go

@@ -0,0 +1,129 @@
+package service_auth
+
+import (
+	"context"
+	"net/url"
+	"nixcn-cms/data"
+	"nixcn-cms/internal/authcode"
+	"nixcn-cms/internal/exception"
+	"nixcn-cms/service/shared"
+
+	"github.com/google/uuid"
+)
+
+type ExchangeData struct {
+	ClientId    string `json:"client_id"`
+	RedirectUri string `json:"redirect_uri"`
+	State       string `json:"state"`
+}
+
+type ExchangePayload struct {
+	Context context.Context
+	UserId  uuid.UUID
+	Data    *ExchangeData
+}
+
+type ExchangeResult struct {
+	Common shared.CommonResult
+	Data   *struct {
+		RedirectUri string `json:"redirect_uri"`
+	}
+}
+
+func (self *AuthServiceImpl) Exchange(payload *ExchangePayload) (result *ExchangeResult) {
+	var err error
+
+	userData, err := new(data.User).
+		GetByUserId(payload.Context, &payload.UserId)
+	if err != nil {
+		exception := new(exception.Builder).
+			SetStatus(exception.StatusServer).
+			SetService(exception.ServiceAuth).
+			SetEndpoint(exception.EndpointAuthServiceExchange).
+			SetType(exception.TypeSpecific).
+			SetOriginal(exception.AuthExchangeGetUserIdFailed).
+			SetError(err).
+			Throw(payload.Context)
+
+		result = &ExchangeResult{
+			Common: shared.CommonResult{
+				HttpCode:  500,
+				Exception: exception,
+			},
+			Data: nil,
+		}
+
+		return
+	}
+
+	code, err := authcode.NewAuthCode(payload.Context, payload.Data.ClientId, userData.Email)
+	if err != nil {
+		exception := new(exception.Builder).
+			SetStatus(exception.StatusServer).
+			SetService(exception.ServiceAuth).
+			SetEndpoint(exception.EndpointAuthServiceExchange).
+			SetType(exception.TypeSpecific).
+			SetOriginal(exception.AuthExchangeCodeGenFailed).
+			SetError(err).
+			Throw(payload.Context)
+
+		result = &ExchangeResult{
+			Common: shared.CommonResult{
+				HttpCode:  500,
+				Exception: exception,
+			},
+			Data: nil,
+		}
+
+		return
+	}
+
+	url, err := url.Parse(payload.Data.RedirectUri)
+	if err != nil {
+		exception := new(exception.Builder).
+			SetStatus(exception.StatusUser).
+			SetService(exception.ServiceAuth).
+			SetEndpoint(exception.EndpointAuthServiceExchange).
+			SetType(exception.TypeSpecific).
+			SetOriginal(exception.AuthExchangeInvalidRedirectUri).
+			SetError(err).
+			Throw(payload.Context)
+
+		result = &ExchangeResult{
+			Common: shared.CommonResult{
+				HttpCode:  400,
+				Exception: exception,
+			},
+			Data: nil,
+		}
+
+		return
+	}
+
+	query := url.Query()
+	query.Set("code", code)
+	url.RawQuery = query.Encode()
+
+	exception := new(exception.Builder).
+		SetStatus(exception.StatusSuccess).
+		SetService(exception.ServiceAuth).
+		SetEndpoint(exception.EndpointAuthServiceExchange).
+		SetType(exception.TypeCommon).
+		SetOriginal(exception.CommonSuccess).
+		SetError(nil).
+		Throw(payload.Context)
+
+	resultData := struct {
+		RedirectUri string `json:"redirect_uri"`
+	}{url.String()}
+
+	result = &ExchangeResult{
+		Common: shared.CommonResult{
+			HttpCode:  200,
+			Exception: exception,
+		},
+		Data: &resultData,
+	}
+
+	return
+}