Added install / remove edgeapp tasks

internal/edgeapps/edgeapps.go

@@ -43,6 +43,7 @@ type EdgeAppService struct {
 
 const configFilename = "/edgebox-compose.yml"
 const envFilename = "/edgebox.env"
+const runnableFilename = "/.run"
 const myEdgeAppServiceEnvFilename = "/myedgeapp.env"
 const defaultContainerOperationSleepTime time.Duration = time.Second * 10
 
@@ -102,6 +103,64 @@ func GetEdgeApp(ID string) MaybeEdgeApp {
 
 }
 
+func IsEdgeAppInstalled(ID string) bool {
+
+	result := false
+
+	_, err := os.Stat(utils.GetPath("edgeAppsPath") + ID + runnableFilename)
+	if !os.IsNotExist(err) {
+		result = true
+	}
+
+	return result
+
+}
+
+func SetEdgeAppInstalled(ID string) bool {
+
+	result := true
+
+	_, err := os.Stat(utils.GetPath("edgeAppsPath") + ID + runnableFilename)
+	if os.IsNotExist(err) {
+
+
+		_, err := os.Create(utils.GetPath("edgeAppsPath") + ID + runnableFilename)
+		result = true
+
+		if err != nil {
+			log.Fatal("Runnable file for EdgeApp could not be created!")
+			result = false
+		}
+
+		buildFrameworkContainers()
+
+
+	} else {
+
+		// Is already installed.
+		result = false
+
+	}
+
+	return result
+
+}
+
+func SetEdgeAppNotInstalled(ID string) bool {
+
+	result := true
+	err := os.Remove(utils.GetPath("edgeAppsPath") + ID + runnableFilename)
+	if err != nil {
+		result = false 
+        log.Fatal(err) 
+    }
+
+	buildFrameworkContainers()
+
+	return result
+
+}
+
 // GetEdgeApps : Returns a list of all available EdgeApps in structs filled with information
 func GetEdgeApps() []EdgeApp {
 
@@ -142,20 +201,29 @@ func GetEdgeAppStatus(ID string) EdgeAppStatus {
 	// - No service running = EdgeApp is off
 
 	runningServices := 0
-	status := EdgeAppStatus{0, "off"}
+	status := EdgeAppStatus{-1, "not-installed"}
-	services := GetEdgeAppServices(ID)
+
-	for _, edgeAppService := range services {
+	if !IsEdgeAppInstalled(ID) {
-		if edgeAppService.IsRunning {
+
-			runningServices++
+		status = EdgeAppStatus{0, "off"}
+
+	} else {
+
+		services := GetEdgeAppServices(ID)
+		for _, edgeAppService := range services {
+			if edgeAppService.IsRunning {
+				runningServices++
+			}
 		}
-	}
 
-	if runningServices > 0 && runningServices != len(services) {
+		if runningServices > 0 && runningServices != len(services) {
-		status = EdgeAppStatus{2, "error"}
+			status = EdgeAppStatus{2, "error"}
-	}
+		}
+
+		if runningServices == len(services) {
+			status = EdgeAppStatus{1, "on"}
+		}
 
-	if runningServices == len(services) {
-		status = EdgeAppStatus{1, "on"}
 	}
 
 	return status

internal/tasks/tasks.go

@@ -35,6 +35,14 @@ type taskStartEdgeAppArgs struct {
 	ID string `json:"id"`
 }
 
+type taskInstallEdgeAppArgs struct {
+	ID string `json:"id"`
+}
+
+type taskRemoveEdgeAppArgs struct {
+	ID string `json:"id"`
+}
+
 type taskStopEdgeAppArgs struct {
 	ID string `json:"id"`
 }
@@ -122,6 +130,31 @@ func ExecuteTask(task Task) Task {
 				task.Result = sql.NullString{String: taskResult, Valid: true}
 			}
 
+		case "install_edgeapp":
+
+			log.Println("Installing EdgeApp...")
+			var args taskInstallEdgeAppArgs
+			err := json.Unmarshal([]byte(task.Args), &args)
+			if err != nil {
+				log.Printf("Error reading arguments of install_edgeapp task: %s", err)
+			} else {
+				taskResult := taskInstallEdgeApp(args)
+				task.Result = sql.NullString{String: taskResult, Valid: true}
+			}
+
+		case "remove_edgeapp":
+
+			
+			log.Println("Removing EdgeApp...")
+			var args taskRemoveEdgeAppArgs
+			err := json.Unmarshal([]byte(task.Args), &args)
+			if err != nil {
+				log.Printf("Error reading arguments of remove_edgeapp task: %s", err)
+			} else {
+				taskResult := taskRemoveEdgeApp(args)
+				task.Result = sql.NullString{String: taskResult, Valid: true}
+			}
+
 		case "start_edgeapp":
 
 			log.Println("Starting EdgeApp...")
@@ -231,6 +264,36 @@ func taskSetupTunnel(args taskSetupTunnelArgs) string {
 
 }
 
+func taskInstallEdgeApp(args taskInstallEdgeAppArgs) string {
+
+	fmt.Println("Executing taskInstallEdgeApp for " + args.ID)
+
+	result := edgeapps.SetEdgeAppInstalled(args.ID)
+
+	resultJSON, _ := json.Marshal(result)
+
+	taskGetEdgeApps()
+
+	return string(resultJSON)
+
+
+}
+
+func taskRemoveEdgeApp(args taskRemoveEdgeAppArgs) string {
+
+	fmt.Println("Executing taskRemoveEdgeApp for " + args.ID)
+
+	result := edgeapps.SetEdgeAppNotInstalled(args.ID)
+
+	resultJSON, _ := json.Marshal(result)
+
+	taskGetEdgeApps()
+
+	return string(resultJSON)
+
+
+}
+
 func taskStartEdgeApp(args taskStartEdgeAppArgs) string {
 
 	fmt.Println("Executing taskStartEdgeApp for " + args.ID)