feat(agent): add service monitor interface and docker implementation

agent/internal/monitor/docker/impl.go

@@ -0,0 +1,42 @@
+package docker
+
+import (
+	"context"
+
+	"gitea.d3m0k1d.ru/d3m0k1d/HellreigN/agent/internal/models"
+	"gitea.d3m0k1d.ru/d3m0k1d/HellreigN/agent/internal/monitor"
+	"github.com/moby/moby/api/types/container"
+	moby "github.com/moby/moby/client"
+	"github.com/samber/lo"
+)
+
+var _ monitor.ServiceMonitor = new(DockerMonitor)
+
+type DockerMonitor struct{}
+
+func New() *DockerMonitor {
+	return &DockerMonitor{}
+}
+
+func (self *DockerMonitor) CheckServices(ctx context.Context) ([]models.Service, error) {
+	client, err := moby.New(moby.FromEnv)
+	if err != nil {
+		return nil, err
+	}
+	ctrs, err := client.ContainerList(ctx, moby.ContainerListOptions{
+		Size:    false,
+		All:     false,
+		Limit:   0,
+		Filters: moby.Filters{},
+		Latest:  false,
+	})
+	if err != nil {
+		return nil, err
+	}
+	return lo.Map(ctrs.Items, func(item container.Summary, _ int) models.Service {
+		return models.Service{
+			Name:   lo.If(len(item.Names) > 0, item.Names[0]).Else(item.ID),
+			Status: string(item.State), // TODO: map to standartized states enum
+		}
+	}), nil
+}