Move wisski instance code to separate package

internal/wisski/cron.go

@@ -0,0 +1,36 @@
+package wisski
+
+import (
+	"time"
+
+	"github.com/tkw1536/goprogram/exit"
+	"github.com/tkw1536/goprogram/stream"
+)
+
+var errCronFailed = exit.Error{
+	Message:  "Failed to run cron script for instance %q: exited with code %s",
+	ExitCode: exit.ExitGeneric,
+}
+
+func (wisski *WissKI) Cron(io stream.IOStream) error {
+	code, err := wisski.Shell(io, "/runtime/cron.sh")
+	if err != nil {
+		io.EPrintln(err)
+	}
+	if code != 0 {
+		// keep going, because we want to run as many crons as possible
+		err = errBlindUpdateFailed.WithMessageF(wisski.Slug, code)
+		io.EPrintln(err)
+	}
+
+	return nil
+}
+
+func (wisski *WissKI) LastCron(server *PHPServer) (t time.Time, err error) {
+	var timestamp int64
+	err = wisski.EvalPHPCode(server, &timestamp, `$val = \Drupal::state()->get('system.cron_last'); return $val; `)
+	if err != nil {
+		return
+	}
+	return time.Unix(timestamp, 0), nil
+}