Add some more tests and implement getElection

cmd/web/handlers.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	api "code.dlmw.ch/dlmw/qv/internal"
+	"code.dlmw.ch/dlmw/qv/internal/mappers"
 	"code.dlmw.ch/dlmw/qv/internal/models"
 	"code.dlmw.ch/dlmw/qv/internal/validator"
 	"code.dlmw.ch/dlmw/qv/ui"
@@ -312,3 +313,23 @@ func getResultsFromVotes(votes *[]models.Vote) []api.VotesForChoice {
 
 	return results
 }
+
+func (app *application) GetElection(w http.ResponseWriter, r *http.Request, id int) {
+	election, err := app.elections.GetById(id)
+	if err != nil {
+		if errors.Is(sql.ErrNoRows, err) {
+			app.clientError(w, http.StatusNotFound, fmt.Sprintf("couldn't find election with id %v", id))
+			return
+		}
+		app.serverError(w, r, err)
+		return
+	}
+
+	response, err := json.Marshal(mappers.ElectionResponse(election))
+	if err != nil {
+		app.serverError(w, r, err)
+		return
+	}
+
+	w.Write(response)
+}