feat(agent): amélioration UI étudiante - instances, statut et lien site

agent/instance.go

@@ -0,0 +1,123 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+)
+
+type InstanceInfo struct {
+	ID           string `json:"id"`
+	TemplateName string `json:"templateName,omitempty"`
+	Port         int    `json:"port"`
+	Status       string `json:"status"`
+}
+
+func instancesFile(dataDir string) string {
+	return filepath.Join(dataDir, "instances.json")
+}
+
+func loadInstances(dataDir string) (map[string]*InstanceInfo, error) {
+	f := instancesFile(dataDir)
+	data, err := os.ReadFile(f)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return make(map[string]*InstanceInfo), nil
+		}
+		return nil, err
+	}
+	var list []*InstanceInfo
+	if err := json.Unmarshal(data, &list); err != nil {
+		return nil, err
+	}
+	m := make(map[string]*InstanceInfo)
+	for _, inst := range list {
+		m[inst.ID] = inst
+	}
+	return m, nil
+}
+
+func saveInstances(dataDir string, instances map[string]*InstanceInfo) error {
+	if err := os.MkdirAll(dataDir, 0755); err != nil {
+		return err
+	}
+	list := make([]*InstanceInfo, 0, len(instances))
+	for _, inst := range instances {
+		list = append(list, inst)
+	}
+	data, err := json.MarshalIndent(list, "", "  ")
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(instancesFile(dataDir), data, 0644)
+}
+
+func upsertInstance(dataDir string, inst *InstanceInfo) error {
+	instances, err := loadInstances(dataDir)
+	if err != nil {
+		return err
+	}
+	instances[inst.ID] = inst
+	return saveInstances(dataDir, instances)
+}
+
+func removeInstance(dataDir, instanceID string) error {
+	instances, err := loadInstances(dataDir)
+	if err != nil {
+		return err
+	}
+	delete(instances, instanceID)
+	return saveInstances(dataDir, instances)
+}
+
+func instanceURL(inst *InstanceInfo) string {
+	return fmt.Sprintf("http://localhost:%d", inst.Port)
+}
+
+func getInstanceStatus(dataDir, instanceID string) string {
+	dir := instanceDir(dataDir, instanceID)
+	composeFile := filepath.Join(dir, "docker-compose.yml")
+	if _, err := os.Stat(composeFile); err != nil {
+		return "stopped"
+	}
+
+	engine := getContainerEngine()
+	cmd := exec.Command(engine, "compose", "-f", composeFile, "ps", "--format", "json")
+	out, err := cmd.Output()
+	if err != nil {
+		return "error"
+	}
+
+	outStr := strings.TrimSpace(string(out))
+	if outStr == "" || outStr == "[]" {
+		return "stopped"
+	}
+
+	// Docker compose JSON output can be a single object or an array
+	if strings.HasPrefix(outStr, "[") {
+		var containers []map[string]interface{}
+		if err := json.Unmarshal(out, &containers); err != nil {
+			return "error"
+		}
+		for _, c := range containers {
+			state, _ := c["State"].(string)
+			if state == "running" {
+				return "running"
+			}
+		}
+		return "stopped"
+	}
+
+	var c map[string]interface{}
+	if err := json.Unmarshal(out, &c); err != nil {
+		return "error"
+	}
+	state, _ := c["State"].(string)
+	if state == "running" {
+		return "running"
+	}
+	return "stopped"
+}