Added docker widget with documentation ✨

internal/feed/docker.go

@@ -0,0 +1,69 @@
+package feed
+
+import (
+	"context"
+	"github.com/docker/docker/api/types/container"
+	"github.com/docker/docker/client"
+	"strings"
+)
+
+const (
+	dockerAPIVersion    = "1.24"
+	dockerGlanceEnable  = "glance.enable"
+	dockerGlanceTitle   = "glance.title"
+	dockerGlanceUrl     = "glance.url"
+	dockerGlanceIconUrl = "glance.iconUrl"
+)
+
+type DockerContainer struct {
+	Id      string
+	Image   string
+	Title   string
+	URL     string
+	IconURL string
+	Status  string
+	State   string
+}
+
+func FetchDockerContainers(ctx context.Context) ([]DockerContainer, error) {
+	apiClient, err := client.NewClientWithOpts(client.WithVersion(dockerAPIVersion), client.FromEnv)
+	if err != nil {
+		return nil, err
+	}
+	defer apiClient.Close()
+
+	containers, err := apiClient.ContainerList(ctx, container.ListOptions{})
+	if err != nil {
+		return nil, err
+	}
+
+	var results []DockerContainer
+
+	for _, c := range containers {
+		isGlanceEnabled := getLabelValue(c.Labels, dockerGlanceEnable, "true")
+
+		if isGlanceEnabled != "true" {
+			continue
+		}
+
+		results = append(results, DockerContainer{
+			Id:      c.ID,
+			Image:   c.Image,
+			Title:   getLabelValue(c.Labels, dockerGlanceTitle, strings.Join(c.Names, "")),
+			URL:     getLabelValue(c.Labels, dockerGlanceUrl, ""),
+			IconURL: getLabelValue(c.Labels, dockerGlanceIconUrl, "si:docker"),
+			Status:  c.Status,
+			State:   c.State,
+		})
+	}
+
+	return results, nil
+}
+
+// getLabelValue get string value associated to a label.
+func getLabelValue(labels map[string]string, labelName, defaultValue string) string {
+	if value, ok := labels[labelName]; ok && len(value) > 0 {
+		return value
+	}
+	return defaultValue
+}