Add group widget

internal/widget/group.go

@@ -0,0 +1,70 @@
+package widget
+
+import (
+	"context"
+	"errors"
+	"html/template"
+	"sync"
+	"time"
+
+	"github.com/glanceapp/glance/internal/assets"
+)
+
+type Group struct {
+	widgetBase `yaml:",inline"`
+	Widgets    Widgets `yaml:"widgets"`
+}
+
+func (widget *Group) Initialize() error {
+	widget.withError(nil)
+	widget.HideHeader = true
+
+	for i := range widget.Widgets {
+		widget.Widgets[i].SetHideHeader(true)
+
+		if widget.Widgets[i].GetType() == "group" {
+			return errors.New("nested groups are not allowed")
+		}
+
+		if err := widget.Widgets[i].Initialize(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (widget *Group) Update(ctx context.Context) {
+	var wg sync.WaitGroup
+	now := time.Now()
+
+	for w := range widget.Widgets {
+		widget := widget.Widgets[w]
+
+		if !widget.RequiresUpdate(&now) {
+			continue
+		}
+
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			widget.Update(ctx)
+		}()
+	}
+
+	wg.Wait()
+}
+
+func (widget *Group) RequiresUpdate(now *time.Time) bool {
+	for i := range widget.Widgets {
+		if widget.Widgets[i].RequiresUpdate(now) {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (widget *Group) Render() template.HTML {
+	return widget.render(widget, assets.GroupTemplate)
+}

internal/widget/widget.go

@@ -63,6 +63,8 @@ func New(widgetType string) (Widget, error) {
 		widget = &Search{}
 	case "extension":
 		widget = &Extension{}
+	case "group":
+		widget = &Group{}
 	default:
 		return nil, fmt.Errorf("unknown widget type: %s", widgetType)
 	}
@@ -100,10 +102,6 @@ func (w *Widgets) UnmarshalYAML(node *yaml.Node) error {
 			return err
 		}
 
-		if err := widget.Initialize(); err != nil {
-			return err
-		}
-
 		*w = append(*w, widget)
 	}
 
@@ -119,6 +117,7 @@ type Widget interface {
 	GetID() uint64
 	SetID(uint64)
 	HandleRequest(w http.ResponseWriter, r *http.Request)
+	SetHideHeader(bool)
 }
 
 type cacheType int
@@ -144,6 +143,7 @@ type widgetBase struct {
 	cacheType           cacheType     `yaml:"-"`
 	nextUpdate          time.Time     `yaml:"-"`
 	updateRetriedTimes  int           `yaml:"-"`
+	HideHeader          bool          `yaml:"-"`
 }
 
 func (w *widgetBase) RequiresUpdate(now *time.Time) bool {
@@ -170,6 +170,10 @@ func (w *widgetBase) SetID(id uint64) {
 	w.ID = id
 }
 
+func (w *widgetBase) SetHideHeader(value bool) {
+	w.HideHeader = value
+}
+
 func (widget *widgetBase) HandleRequest(w http.ResponseWriter, r *http.Request) {
 	http.Error(w, "not implemented", http.StatusNotImplemented)
 }