tsk-19: Service login (#23)

Closes #19

Reviewed-on: phoenix/textsender-auth#23
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

internal/handler/service.go

@@ -3,12 +3,22 @@ package handler
 import (
 	"net/http"
 
+	"git.kundeng.us/phoenix/textsender-models/pkg/token"
 	"git.kundeng.us/phoenix/textsender-models/pkg/user"
 
+	"git.kundeng.us/phoenix/textsender-auth/internal/config"
 	"git.kundeng.us/phoenix/textsender-auth/internal/store"
 	"git.kundeng.us/phoenix/textsender-auth/internal/utility"
 )
 
+type ServiceHandler struct {
+	ServiceStore store.ServiceStore
+}
+
+func NewServiceHandler(serviceStore store.ServiceStore) *ServiceHandler {
+	return &ServiceHandler{ServiceStore: serviceStore}
+}
+
 type ServiceCreationRequest struct {
 	Username   string `json:"username"`
 	Passphrase string `json:"passphrase"`
@@ -19,14 +29,6 @@ type ServiceCreationResponse struct {
 	Data    []*user.ServiceUser `json:"data"`
 }
 
-type ServiceHandler struct {
-	ServiceStore store.ServiceStore
-}
-
-func NewServiceHandler(serviceStore store.ServiceStore) *ServiceHandler {
-	return &ServiceHandler{ServiceStore: serviceStore}
-}
-
 // Register godoc
 // @Summary      Register service user
 // @Description  Create a service user that can send texts (requires JWT)
@@ -80,3 +82,76 @@ func (s *ServiceHandler) Register(w http.ResponseWriter, r *http.Request) {
 
 	RespondWithJson(w, statusCode, &resp)
 }
+
+type ServiceLoginRequest struct {
+	Username   string `json:"username"`
+	Passphrase string `json:"passphrase"`
+}
+
+type ServiceLoginResponse struct {
+	Message string         `json:"message"`
+	Data    []*token.Login `json:"data"`
+}
+
+// Login godoc
+// @Summary      Service login
+// @Description  Servce login and be given an access token (requires JWT)
+// @Tags         service users
+// @Accept       json
+// @Produce      json
+// @Security     BearerAuth
+// @Param        request body      ServiceLoginRequest true  "Data to obtain a service token"
+// @Success      200  {object}  ServiceLoginResponse
+// @Failure      500  {object}  ServiceLoginResponse
+// @Router       /service/login [post]
+func (s *ServiceHandler) Login(w http.ResponseWriter, r *http.Request) {
+	var req ServiceLoginRequest
+	if err := ExtractFromRequest(r, &req); err != nil {
+		http.Error(w, "Invalid JSON: "+err.Error(), http.StatusBadRequest)
+	}
+	defer r.Body.Close()
+
+	var statusCode int
+	var resp ServiceLoginResponse
+
+	if len(req.Username) == 0 || len(req.Passphrase) == 0 {
+		statusCode = http.StatusBadRequest
+		resp.Message = "Invalid request"
+		RespondWithJson(w, statusCode, &resp)
+		return
+	}
+
+	ctx := r.Context()
+
+	if serviceUser, err := s.ServiceStore.GetWithUsername(ctx, req.Username); err != nil {
+		statusCode = http.StatusInternalServerError
+		resp.Message = err.Error()
+	} else {
+		if serviceUser == nil {
+			statusCode = http.StatusNotFound
+			resp.Message = "Not found"
+		} else {
+			hashing := utility.HashMash{Password: req.Passphrase}
+			if !hashing.CheckPasswordHash(req.Passphrase, serviceUser.Passphrase) {
+				statusCode = http.StatusInternalServerError
+				resp.Message = "Not valid"
+			} else {
+				var tokGen utility.TokenGenerator
+				tokGen.SetHourOffset(8)
+				secretKey := config.GetSecretKey()
+				tokGen.SetSecretKey(secretKey)
+
+				if myToken, err := tokGen.GenerateToken(*serviceUser); err != nil {
+					statusCode = http.StatusInternalServerError
+					resp.Message = err.Error()
+				} else {
+					statusCode = http.StatusOK
+					resp.Data = append(resp.Data, myToken)
+					resp.Message = "Successful"
+				}
+			}
+		}
+	}
+
+	RespondWithJson(w, statusCode, &resp)
+}