Move instance > purge to a separate page

internal/dis/component/server/admin/instance_purge.go

@@ -0,0 +1,59 @@
+package admin
+
+import (
+	"context"
+	_ "embed"
+	"html/template"
+	"net/http"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/server/assets"
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/server/templating"
+	"github.com/FAU-CDI/wisski-distillery/internal/wisski"
+	"github.com/tkw1536/pkglib/httpx"
+
+	"github.com/julienschmidt/httprouter"
+)
+
+//go:embed "html/instance_purge.html"
+var instancePurgeHTML []byte
+var instancePurgeTemplate = templating.Parse[instancePurgeContext](
+	"instance_purge.html", instancePurgeHTML, nil,
+
+	templating.Assets(assets.AssetsAdmin),
+)
+
+type instancePurgeContext struct {
+	templating.RuntimeFlags
+
+	Instance *wisski.WissKI
+}
+
+func (admin *Admin) instancePurge(ctx context.Context) http.Handler {
+	tpl := instancePurgeTemplate.Prepare(
+		admin.dependencies.Templating,
+		templating.Crumbs(
+			menuAdmin,
+			menuInstances,
+			menuInstance,
+			menuPurge,
+		),
+	)
+
+	return tpl.HTMLHandlerWithFlags(func(r *http.Request) (ctx instancePurgeContext, funcs []templating.FlagFunc, err error) {
+		slug := httprouter.ParamsFromContext(r.Context()).ByName("slug")
+
+		// setup the context with just the instance
+		ctx.Instance, err = admin.dependencies.Instances.WissKI(r.Context(), slug)
+		if err != nil {
+			return ctx, nil, httpx.ErrNotFound
+		}
+
+		return ctx, []templating.FlagFunc{
+			templating.ReplaceCrumb(menuInstance, component.MenuItem{Title: "Instance", Path: template.URL("/admin/instance/" + ctx.Instance.Slug)}),
+			templating.ReplaceCrumb(menuPurge, component.MenuItem{Title: "Purge", Path: template.URL("/admin/instance/" + ctx.Instance.Slug + "/purge")}),
+			templating.Title(ctx.Instance.Slug + " - Purge"),
+			admin.instanceTabs(slug, "purge"),
+		}, nil
+	})
+}