Refactor query processing and user retrieval

Introduce QueryParams struct to encapsulate request query parameters,
streamlining the extraction and usage within the lending handler. Also,
centralize user extraction logic by adding GetUserFromCtx function,
improving code reusability and clarity. Error handling is enhanced by
logging issues during query parameter parsing.

Resolves user handling inconsistency and simplifies event query
construction.

pkg/lending/handler.go

@@ -1,6 +1,7 @@
 package lending
 
 import (
+	"log/slog"
 	"net/http"
 
 	"github.com/labstack/echo/v4"
@@ -11,16 +12,30 @@ import (
 	"github.com/marcopollivier/techagenda/pkg/user"
 )
 
+type QueryParams struct {
+	Name      string              `query:"name"`
+	City      string              `query:"city"`
+	Tags      []string            `query:"tags"`
+	TypeOf    []event.EventTypeOf `query:"type_of"`
+	Available bool                `query:"available"`
+	Page      int                 `query:"page"`
+	Limit     int                 `query:"limit"`
+}
+
 func NewLendingHandler(server *echo.Echo, eventService event.Service, engine *ssr.Engine) {
 	server.Static("/assets", "./ui/public/")
 
 	server.GET("/v2", func(c echo.Context) (err error) {
-		var userPtr *user.User
-		events, _ := eventService.Get(c.Request().Context(), "", "", []string{}, []event.EventTypeOf{}, false, 0, 50)
-		if userData, ok := c.Request().Context().Value(user.MiddlewareUserKey).(user.User); ok {
-			userPtr = &userData
+		var (
+			ctx = c.Request().Context()
+			qp  QueryParams
+		)
+		if err = c.Bind(&qp); err != nil {
+			slog.ErrorContext(ctx, "Error parsing query params", "error", err.Error())
 		}
 
+		events, _ := eventService.Get(ctx, qp.Name, qp.City, qp.Tags, qp.TypeOf, qp.Available, qp.Page, qp.Limit)
+
 		page := engine.RenderRoute(gossr.RenderConfig{
 			File:  "pages/Lending.tsx",
 			Title: "TechAgenda",
@@ -30,7 +45,7 @@ func NewLendingHandler(server *echo.Echo, eventService event.Service, engine *ss
 			},
 			Props: &ssr.Props{
 				Events: events,
-				User:   userPtr,
+				User:   user.GetUserFromCtx(ctx),
 			},
 		})
 		return c.HTML(http.StatusOK, string(page))

pkg/user/middleware.go

@@ -37,3 +37,11 @@ func AuthMiddleware(service Service) echo.MiddlewareFunc {
 		}
 	}
 }
+
+func GetUserFromCtx(ctx context.Context) *User {
+	var userPtr *User
+	if userData, ok := ctx.Value(MiddlewareUserKey).(User); ok {
+		userPtr = &userData
+	}
+	return userPtr
+}