initial commit

task.go

@@ -0,0 +1,96 @@
+// Copyright (C) 2020 Marius Schellenberger
+
+package pve
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+)
+
+const (
+	TaskTimeout             = 300
+	TaskStatusCheckInterval = 2
+	TaskExitStatusOK        = "OK"
+	TaskStatusRunning       = "running"
+	TaskStatusStopped       = "stopped"
+)
+
+type Task struct {
+	ID         string `json:"upid"`
+	Type       string `json:"type"`
+	Status     string `json:"status"`
+	Exitstatus string `json:"exitstatus"`
+}
+
+type TaskClient struct {
+	client *Client
+}
+
+func nodeFromTaskID(taskid string) (string, error) {
+	a := strings.SplitN(taskid, ":", 3)
+	if len(a) < 2 {
+		return "", errors.New("error parsing taskid")
+	}
+	return a[1], nil
+}
+
+func (c *TaskClient) MustGet(ctx context.Context, taskid string) (t *Task) {
+	t = &Task{ID: taskid}
+	task, err := c.Get(ctx, taskid)
+	if err == nil {
+		t = task
+	}
+	return
+}
+
+func (c *TaskClient) Get(ctx context.Context, taskid string) (t *Task, err error) {
+	node, err := nodeFromTaskID(taskid)
+	if err != nil {
+		return
+	}
+	req, err := c.client.NewRequest(ctx, "GET", fmt.Sprintf("/nodes/%s/tasks/%s/status", node, taskid), nil)
+	if err != nil {
+		return
+	}
+	t = &Task{ID: taskid}
+	_, err = c.client.Do(req, t)
+	return
+}
+
+type OnTaskChange func(t *Task)
+
+func (c *TaskClient) Wait(ctx context.Context, t *Task, f OnTaskChange) error {
+	if f != nil && t.Status != "" {
+		f(t)
+	}
+	if t.Status == TaskStatusStopped {
+		if t.Exitstatus == TaskExitStatusOK {
+			return nil
+		}
+		return errors.New(t.Exitstatus)
+	}
+	waited := 0
+	for waited < TaskTimeout {
+		task, err := c.Get(ctx, t.ID)
+		if err != nil {
+			return err
+		}
+		if task.Status != t.Status {
+			if f != nil {
+				f(task)
+			}
+			if task.Status == TaskStatusStopped {
+				if task.Exitstatus == TaskExitStatusOK {
+					return nil
+				}
+				return errors.New(task.Exitstatus)
+			}
+		}
+		time.Sleep(TaskStatusCheckInterval * time.Second)
+		waited = waited + TaskStatusCheckInterval
+	}
+	return errors.New("task wait timeout for: " + t.ID)
+}