webhooker/internal/handlers/event_detail.go

package handlers

import (
	"math"
	"net/http"

	"github.com/go-chi/chi"
	"sneak.berlin/go/webhooker/internal/database"
)

// HandleEventDetail shows one event on its own page: its details,
// its whole body and every delivery of it. The page reads the
// event's body whole, which the receiver caps at 1 MB.
func (h *Handlers) HandleEventDetail() http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		webhook, ok := h.ownedWebhook(w, r)
		if !ok {
			return
		}

		if !h.dbMgr.DBExists(webhook.ID) {
			h.renderError(w, r, http.StatusNotFound)

			return
		}

		webhookDB, err := h.dbMgr.GetDB(webhook.ID)
		if err != nil {
			h.serverError(w, r, "failed to get webhook database", err)

			return
		}

		var rows []eventLogRow

		err = webhookDB.Model(&database.Event{}).
			Select(eventColumns).
			Where(
				"id = ? AND webhook_id = ?",
				chi.URLParam(r, "eventID"), webhook.ID,
			).
			Limit(1).
			Find(&rows).Error
		if err != nil {
			h.serverError(w, r, "failed to load event", err)

			return
		}

		if len(rows) == 0 {
			h.renderError(w, r, http.StatusNotFound)

			return
		}

		targets, err := h.loadTargetMap(webhook.ID)
		if err != nil {
			h.serverError(w, r, "failed to load targets", err)

			return
		}

		// The page shows every request header.
		views, ok := h.eventLogViews(
			w, r, webhookDB, webhook.ID, rows, targets, math.MaxInt,
		)
		if !ok {
			return
		}

		h.renderTemplate(w, r, "event_detail.html", map[string]any{
			tmplKeyWebhook: &webhook,
			"Event":        views[0],
		})
	}
}