V2 alpha - initial version (#172)

Initial alpha codebase for version 2 of WireGuard Portal.
This version is considered unstable and incomplete (for example, no public REST API)! 
Use with care!


Fixes/Implements the following issues:
 - OAuth support #154, #1 
 - New Web UI with internationalisation support #98, #107, #89, #62
 - Postgres Support #49 
 - Improved Email handling #47, #119 
 - DNS Search Domain support #46 
 - Bugfixes #94, #48 

---------

Co-authored-by: Fabian Wechselberger <wechselbergerf@hotmail.com>

internal/app/api/v0/handlers/endpoint_testing.go

@@ -0,0 +1,65 @@
+package handlers
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/h44z/wg-portal/internal/app/api/v0/model"
+	"net/http"
+	"os"
+	"time"
+)
+
+type testEndpoint struct{}
+
+func (e testEndpoint) GetName() string {
+	return "TestEndpoint"
+}
+
+func (e testEndpoint) RegisterRoutes(g *gin.RouterGroup, authenticator *authenticationHandler) {
+	g.GET("/now", e.handleCurrentTimeGet())
+	g.GET("/hostname", e.handleHostnameGet())
+}
+
+// handleCurrentTimeGet represents the GET endpoint that responds the current time
+//
+// @ID test_handleCurrentTimeGet
+// @Tags Testing
+// @Summary Get the current local time.
+// @Description Nothing more to describe...
+// @Produce json
+// @Success 200 {object} string
+// @Failure 500 {object} model.Error
+// @Router /now [get]
+func (e testEndpoint) handleCurrentTimeGet() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if time.Now().Second() == 0 {
+			c.JSON(http.StatusInternalServerError, model.Error{
+				Code:    http.StatusInternalServerError,
+				Message: "invalid time",
+			})
+		}
+		c.JSON(http.StatusOK, time.Now().String())
+	}
+}
+
+// handleHostnameGet represents the GET endpoint that responds the current hostname
+//
+// @ID test_handleHostnameGet
+// @Tags Testing
+// @Summary Get the current host name.
+// @Description Nothing more to describe...
+// @Produce json
+// @Success 200 {object} string
+// @Failure 500 {object} model.Error
+// @Router /hostname [get]
+func (e testEndpoint) handleHostnameGet() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		hostname, err := os.Hostname()
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, model.Error{
+				Code:    http.StatusInternalServerError,
+				Message: err.Error(),
+			})
+		}
+		c.JSON(http.StatusOK, hostname)
+	}
+}