Let an entrypoint's description be edited in place (closes #392)

Each entrypoint on the webhook page has an Edit button that shows its
description as a form, with Save and Cancel, in place. Edit hides while
the form is open, so the form always opens on the saved description.
Saving posts to /hook/{id}/entrypoints/{entrypointID}/edit, behind the
same login, CSRF and ownership checks as activate, deactivate and
delete, and writes only the description column, so the URL never
changes. An empty description shows as "Entrypoint". Activate and
deactivate now write only the active column, so they cannot write back
an older description over an edit.

Model: opus-5-5

internal/server/alpine_browser_test.go

@@ -86,6 +86,7 @@ func TestAlpineRunsUnderTheSecurityPolicy(t *testing.T) {
 	checkAddForms(ctx, t, page)
 	checkTargetType(ctx, t, page+"/events")
 	checkCopy(ctx, t, page)
+	checkEntrypointEdit(ctx, t, page)
 	checkEventLog(ctx, t, page+"/events", event.ID, target.Name)
 	checkMobileMenu(ctx, t, page)
 
@@ -363,6 +364,62 @@ func checkCopy(ctx context.Context, t *testing.T, url string) {
 		`clicking Copy does not show "Copied"`)
 }
 
+// checkEntrypointEdit loads a webhook page whose entrypoint has no
+// description, and checks that Edit shows the edit form in place of
+// the description and hides until the form closes, so the form always
+// opens on the saved description; that Cancel hides it and drops what
+// was typed; and that Save changes the description the page shows.
+func checkEntrypointEdit(ctx context.Context, t *testing.T, url string) {
+	t.Helper()
+
+	const (
+		editForm    = `form[action$="/edit"]`
+		input       = editForm + ` input[name="description"]`
+		description = `//span[text()="Entrypoint"]`
+		edit        = `//button[text()="Edit"]`
+	)
+
+	require.NoError(t, chromedp.Run(ctx, loadPage(url)))
+
+	assert.True(t, hidden(ctx, editForm),
+		"the edit form shows before Edit is clicked")
+
+	click(ctx, t, edit)
+	assert.True(t, shown(ctx, editForm),
+		"clicking Edit does not show the edit form")
+	assert.True(t, hidden(ctx, description),
+		"the description stays shown beside the edit form")
+	assert.True(t, hidden(ctx, edit),
+		"Edit stays shown while the edit form is open")
+
+	require.NoError(t, chromedp.Run(
+		ctx, chromedp.SendKeys(input, "draft", chromedp.ByQuery),
+	))
+	click(ctx, t, `//button[text()="Cancel"]`)
+	assert.True(t, hidden(ctx, editForm),
+		"clicking Cancel does not hide the edit form")
+	assert.True(t, shown(ctx, description),
+		"clicking Cancel does not show the description again")
+	assert.True(t, shown(ctx, edit),
+		"clicking Cancel does not show Edit again")
+
+	var typed string
+
+	click(ctx, t, edit)
+	require.NoError(t, chromedp.Run(
+		ctx, chromedp.Value(input, &typed, chromedp.ByQuery),
+	))
+	assert.Empty(t, typed, "Cancel keeps what was typed")
+
+	require.NoError(t, chromedp.Run(
+		ctx, chromedp.SendKeys(input, "Billing sender", chromedp.ByQuery),
+	))
+	click(ctx, t, `//button[text()="Save"]`)
+
+	assert.True(t, shown(ctx, `//span[text()="Billing sender"]`),
+		"saving the edit form does not change the description")
+}
+
 // checkEventLog loads the event log and checks that clicking an event's
 // row expands it, that in there clicking its delivery shows the
 // delivery's attempts and clicking again hides them, and that clicking

internal/server/routes.go

@@ -289,6 +289,10 @@ func (s *Server) setupSourceRoutes() {
 			"/entrypoints",
 			s.h.HandleEntrypointCreate(),
 		)
+		r.Post(
+			"/entrypoints/{entrypointID}/edit",
+			s.h.HandleEntrypointEdit(),
+		)
 		r.Post(
 			"/entrypoints/{entrypointID}/delete",
 			s.h.HandleEntrypointDelete(),

internal/server/routes_test.go

@@ -12,6 +12,7 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/google/uuid"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/fx"
@@ -398,6 +399,44 @@ func (e *testEnv) seedTarget(
 	return tgt
 }
 
+// seedEntrypoint creates an active entrypoint for a webhook.
+func (e *testEnv) seedEntrypoint(
+	t *testing.T,
+	webhookID string,
+) *database.Entrypoint {
+	t.Helper()
+
+	ep := &database.Entrypoint{
+		WebhookID:   webhookID,
+		Path:        uuid.New().String(),
+		Description: "Default entrypoint",
+		Active:      true,
+	}
+
+	require.NoError(
+		t,
+		e.db.DB().Omit(clause.Associations).Create(ep).Error,
+	)
+
+	return ep
+}
+
+// storedEntrypoint reloads an entrypoint row.
+func (e *testEnv) storedEntrypoint(
+	t *testing.T,
+	entrypointID string,
+) database.Entrypoint {
+	t.Helper()
+
+	var ep database.Entrypoint
+
+	require.NoError(
+		t, e.db.DB().First(&ep, "id = ?", entrypointID).Error,
+	)
+
+	return ep
+}
+
 // seedFailedDelivery records a terminally failed delivery of an event
 // to a target in the webhook's own database.
 func (e *testEnv) seedFailedDelivery(
@@ -1087,6 +1126,119 @@ func TestHook_EntrypointActions(t *testing.T) {
 	assert.Zero(t, left, "the delete should remove the entrypoint")
 }
 
+// TestHook_EntrypointEdit changes an entrypoint's description with the
+// edit form on the webhook page, then empties it. The entrypoint keeps
+// its URL, and with no description it shows as "Entrypoint". Without
+// the CSRF token, or without a session, the edit is refused.
+func TestHook_EntrypointEdit(t *testing.T) {
+	t.Parallel()
+
+	env := newTestEnv(t)
+
+	userID, _ := env.seedUser(t, "epeditor", "somepassword")
+	cookies := env.authCookies(t, userID, "epeditor")
+	wh := env.seedWebhook(t, userID)
+	ep := env.seedEntrypoint(t, wh.ID)
+	page := "/hook/" + wh.ID
+
+	token, cookies := env.csrfFrom(t, page, cookies)
+	action := env.urlFrom(
+		t, page, `action="(/hook/[^/"]+/entrypoints/[^/"]+/edit)"`,
+		cookies,
+	)
+
+	assert.Equal(
+		t, http.StatusForbidden,
+		env.post(action, entrypointEditForm("", "no token"), cookies).Code,
+		"an edit without a CSRF token must be refused",
+	)
+
+	// The request without a session carries a valid CSRF token from
+	// the login page, so only the session check can refuse it.
+	anonToken, anon := env.csrfFrom(t, "/pages/login", nil)
+	refused := env.post(
+		action, entrypointEditForm(anonToken, "no session"), anon,
+	)
+	assert.Equal(t, http.StatusSeeOther, refused.Code)
+	assert.Equal(
+		t, "/pages/login", refused.Header().Get("Location"),
+		"an edit without a session must be refused",
+	)
+
+	assert.Equal(
+		t, ep.Description, env.storedEntrypoint(t, ep.ID).Description,
+		"a refused edit must not change the description",
+	)
+
+	// edit submits the form with description and requires the
+	// redirect back to the webhook page with the notice.
+	edit := func(description string) {
+		t.Helper()
+
+		w := env.post(
+			action, entrypointEditForm(token, description), cookies,
+		)
+		env.requireNotice(t, w, page, "entrypoint-saved",
+			"Entrypoint description saved.", cookies)
+	}
+
+	edit("Billing sender")
+
+	stored := env.storedEntrypoint(t, ep.ID)
+	assert.Equal(t, "Billing sender", stored.Description)
+	assert.Equal(t, ep.Path, stored.Path,
+		"the edit must keep the entrypoint's URL")
+
+	body := env.get(page, cookies).Body.String()
+	assert.Contains(t, body, ">Billing sender</span>")
+	assert.Contains(t, body, "/h/"+ep.Path+"</code>")
+
+	edit("")
+
+	assert.Empty(t, env.storedEntrypoint(t, ep.ID).Description)
+	assert.Contains(t, env.get(page, cookies).Body.String(),
+		">Entrypoint</span>", "no description shows as Entrypoint")
+}
+
+// TestHook_EntrypointEdit_OtherUser404s has another logged-in user, with
+// a CSRF token of their own, try to edit an entrypoint: through the
+// owner's webhook, and through a webhook of their own. Both are 404s
+// and the description stays as it was.
+func TestHook_EntrypointEdit_OtherUser404s(t *testing.T) {
+	t.Parallel()
+
+	env := newTestEnv(t)
+
+	ownerID, _ := env.seedUser(t, "epowner", "somepassword")
+	wh := env.seedWebhook(t, ownerID)
+	ep := env.seedEntrypoint(t, wh.ID)
+
+	otherID, _ := env.seedUser(t, "epother", "somepassword")
+	other := env.authCookies(t, otherID, "epother")
+	theirs := env.seedWebhook(t, otherID)
+	token, other := env.csrfFrom(t, "/hook/"+theirs.ID, other)
+
+	for _, webhookID := range []string{wh.ID, theirs.ID} {
+		path := "/hook/" + webhookID + "/entrypoints/" + ep.ID + "/edit"
+
+		w := env.post(path, entrypointEditForm(token, "not theirs"), other)
+		assert.Equal(t, http.StatusNotFound, w.Code, path)
+	}
+
+	assert.Equal(
+		t, ep.Description, env.storedEntrypoint(t, ep.ID).Description,
+		"another user must not change the description",
+	)
+}
+
+// entrypointEditForm fills in the webhook page's entrypoint edit form.
+func entrypointEditForm(token, description string) url.Values {
+	return url.Values{
+		"csrf_token":  {token},
+		"description": {description},
+	}
+}
+
 // TestHook_TargetActions adds a target with the form on the webhook
 // page, follows its Edit link to the target edit form and submits
 // it, then deactivates, activates and deletes it, every URL and token