instances: Add methods to evaluate PHP

internal/component/instances/wisski_status.go

@@ -1,22 +1,41 @@
 package instances
 
-import "github.com/tkw1536/goprogram/stream"
+import (
+	"github.com/tkw1536/goprogram/stream"
+	"golang.org/x/sync/errgroup"
+)
 
 // Info represents some info about this WissKI
 type Info struct {
 	Slug string // The slug of the instance
 
 	Running bool // is the instance running?
+
+	DrupalVersion interface{} // version of drupal being used
 }
 
-// Info returns info about this instance
+// Info returns information about this WissKI instance.
 func (wisski *WissKI) Info() (info Info, err error) {
+	// static properties
 	info.Slug = wisski.Slug
 
-	ps, err := wisski.Barrel().Ps(stream.FromNil())
-	if err != nil {
+	// dynamic properties, TODO: Add more properties here!
+	var group errgroup.Group
+
+	group.Go(func() (err error) {
+		info.Running, err = wisski.Alive()
 		return
-	}
-	info.Running = len(ps) > 0
+	})
+
+	err = group.Wait()
 	return
 }
+
+// Alive checks if this WissKI is currently running.
+func (wisski *WissKI) Alive() (bool, error) {
+	ps, err := wisski.Barrel().Ps(stream.FromNil())
+	if err != nil {
+		return false, err
+	}
+	return len(ps) > 0, nil
+}