unpoller_unpoller/pkg/inputunifi/interface.go

package inputunifi

/* This file contains the three poller.Input interface methods. */

import (
	"fmt"
	"strings"

	"github.com/unpoller/unifi/v6"
	"github.com/unpoller/unpoller/pkg/poller"
	"github.com/unpoller/unpoller/pkg/webserver"
)

var (
	ErrDynamicLookupsDisabled = fmt.Errorf("filter path requested but dynamic lookups disabled")
	ErrControllerNumNotFound  = fmt.Errorf("controller number not found")
	ErrNoFilterKindProvided   = fmt.Errorf("must provide filter: devices, clients, other")
	ErrNetworkDisabled        = fmt.Errorf("controller has disable_network set: no Network application to query")
)

// Initialize gets called one time when starting up.
// Satisfies poller.Input interface.
func (u *InputUnifi) Initialize(l poller.Logger) error {
	if u.Config == nil {
		u.Config = &Config{Disable: true}
	}

	if u.Logger = l; u.Disable {
		u.Logf("UniFi input plugin disabled or missing configuration!")

		return nil
	}

	// Discover remote controllers if remote mode is enabled at config level
	if u.Remote && u.RemoteAPIKey != "" {
		u.Logf("Remote API mode enabled, discovering controllers...")

		discovered, err := u.discoverRemoteControllers(u.RemoteAPIKey)
		if err != nil {
			u.LogErrorf("Failed to discover remote controllers: %v", err)
		} else if len(discovered) > 0 {
			// Replace controllers with discovered ones when using config-level remote mode
			u.Controllers = discovered
			u.Logf("Discovered %d remote controller(s)", len(discovered))
		}
	} else {
		// Only set default controller if not using config-level remote mode
		if u.setDefaults(&u.Default); len(u.Controllers) == 0 && !u.Dynamic {
			u.Controllers = []*Controller{&u.Default}
		}

		// Check individual controllers for remote flag (per-controller remote mode)
		for _, c := range u.Controllers {
			if c.Remote && c.APIKey != "" && c.ConsoleID == "" {
				// This controller has remote flag but no console ID, try to discover
				discovered, err := u.discoverRemoteControllers(c.APIKey)
				if err != nil {
					u.LogErrorf("Failed to discover remote controllers for controller: %v", err)

					continue
				}

				if len(discovered) > 0 {
					// Replace this controller with discovered ones
					// Remove the current one and add discovered
					newControllers := []*Controller{}

					for _, existing := range u.Controllers {
						if existing != c {
							newControllers = append(newControllers, existing)
						}
					}

					newControllers = append(newControllers, discovered...)
					u.Controllers = newControllers
				}
			}
		}
	}

	if len(u.Controllers) == 0 {
		u.setDefaults(&u.Default)
		u.Logf("No controllers configured. Polling dynamic controllers only! Defaults:")
		u.logController(&u.Default)
	}

	for i, c := range u.Controllers {
		u.warnProtectOnly(u.setControllerDefaults(c))

		if err := u.getUnifi(c); err != nil {
			u.LogErrorf("Controller %d of %d Auth or Connection Error, retrying: %v", i+1, len(u.Controllers), err)

			continue
		}

		// A Protect-only console has no sites to check.
		if !*c.DisableNetwork {
			if err := u.checkSites(c); err != nil {
				u.LogErrorf("checking sites on %s: %v", c.URL, err)
			}
		}

		u.Logf("Configured UniFi Controller %d of %d:", i+1, len(u.Controllers))
		u.logController(c)
	}

	webserver.UpdateInput(&webserver.Input{Name: PluginName, Config: formatConfig(u.Config)})

	return nil
}

func (u *InputUnifi) DebugInput() (bool, error) {
	if u == nil || u.Config == nil {
		return true, nil
	}

	if u.setDefaults(&u.Default); len(u.Controllers) == 0 && !u.Dynamic {
		u.Controllers = []*Controller{&u.Default}
	}

	if len(u.Controllers) == 0 {
		u.setDefaults(&u.Default)
		u.Logf("No controllers configured. Polling dynamic controllers only! Defaults:")
		u.logController(&u.Default)
	}

	allOK := true

	var allErrors error

	for i, c := range u.Controllers {
		if err := u.getUnifi(u.setControllerDefaults(c)); err != nil {
			u.LogErrorf("Controller %d of %d Auth or Connection Error, retrying: %v", i+1, len(u.Controllers), err)

			allOK = false

			if allErrors != nil {
				allErrors = fmt.Errorf("%v: %w", err, allErrors)
			} else {
				allErrors = err
			}

			continue
		}

		// A Protect-only console has no sites to check.
		if !*c.DisableNetwork {
			if err := u.checkSites(c); err != nil {
				u.LogErrorf("checking sites on %s: %v", c.URL, err)

				allOK = false

				if allErrors != nil {
					allErrors = fmt.Errorf("%v: %w", err, allErrors)
				} else {
					allErrors = err
				}

				continue
			}
		}

		u.Logf("Valid UniFi Controller %d of %d:", i+1, len(u.Controllers))
		u.logController(c)
	}

	return allOK, allErrors
}

func (u *InputUnifi) logController(c *Controller) {
	mode := "Local"
	if c.Remote {
		mode = "Remote"
		if c.ConsoleID != "" {
			mode += fmt.Sprintf(" (Console: %s)", c.ConsoleID)
		}
	}

	if *c.DisableNetwork {
		mode += " (Protect only: no Network application)"
	}

	u.Logf("   => Mode: %s", mode)
	u.Logf("   => URL: %s (verify SSL: %v, timeout: %v)", c.URL, *c.VerifySSL, c.Timeout.Duration)

	if len(c.CertPaths) > 0 {
		u.Logf("   => Cert Files: %s", strings.Join(c.CertPaths, ", "))
	}

	if c.Unifi != nil {
		u.Logf("   => Version: %s (%s)", c.Unifi.ServerVersion, c.Unifi.UUID)
	}

	if c.Remote {
		u.Logf("   => API Key: %v", c.APIKey != "")
	} else {
		u.Logf("   => Username: %s (has password: %v) (has api-key: %v)", c.User, c.Pass != "", c.APIKey != "")
	}

	u.Logf("   => Hash PII %v / Drop PII %v", *c.HashPII, *c.DropPII)
	u.Logf("   => Save Protect Devices: %v (has protect-api-key: %v)", *c.SaveProtectDevices, c.ProtectAPIKey != "")
	u.Logf("   => Save Protect Logs %v (thumbnails: %v)", *c.SaveProtectLogs, *c.ProtectThumbnails)

	// The rest are all Network-application settings; printing them for a Protect-only
	// console would only suggest data that is never collected.
	if *c.DisableNetwork {
		return
	}

	u.Logf("   => Poll Sites: %s", strings.Join(c.Sites, ", "))
	u.Logf("   => Save Sites %v / Save DPI %v (metrics)", *c.SaveSites, *c.SaveDPI)
	u.Logf("   => Save Events %v / Save Syslog %v / Save IDs %v (logs)", *c.SaveEvents, *c.SaveSyslog, *c.SaveIDs)
	u.Logf("   => Save Alarms %v / Anomalies %v", *c.SaveAlarms, *c.SaveAnomal)
	u.Logf("   => Save Rogue APs: %v", *c.SaveRogue)
	u.Logf("   => Save Traffic %v", *c.SaveTraffic)
	u.Logf("   => Save Speed Tests: %v", *c.SaveSpeedTest)
}

// warnProtectOnly reports a disable_network controller that can never collect anything.
// Neither case is fatal -- the controller is still polled -- but both are always a mistake,
// and silently collecting nothing is the failure mode hardest to diagnose from a log.
func (u *InputUnifi) warnProtectOnly(c *Controller) {
	if !*c.DisableNetwork {
		return
	}

	if !*c.SaveProtectDevices && !*c.SaveProtectLogs {
		u.LogErrorf("Controller %s sets disable_network but neither save_protect_devices nor "+
			"save_protect_logs: nothing will be collected from it", c.URL)
	}

	if *c.SaveProtectDevices && c.ProtectAPIKey == "" && c.APIKey == "" {
		u.LogErrorf("Controller %s sets disable_network and save_protect_devices but no "+
			"protect_api_key: the Protect Integration API cannot be authenticated", c.URL)
	}
}

// Events allows you to pull only events (and IDs) from the UniFi Controller.
// This does not fully respect HashPII, but it may in the future!
// Use Filter.Path to pick a specific controller, otherwise poll them all!
func (u *InputUnifi) Events(filter *poller.Filter) (*poller.Events, error) {
	if u.Disable {
		return nil, nil
	}

	logs := []any{}

	if filter == nil {
		filter = &poller.Filter{}
	}

	var collectionErrors []error

	for _, c := range u.Controllers {
		if filter.Path != "" && !strings.EqualFold(c.URL, filter.Path) {
			continue
		}

		events, err := u.collectControllerEvents(c)
		if err != nil {
			// Log error but continue to next controller
			u.LogErrorf("Failed to collect events from controller %s: %v", c.URL, err)
			collectionErrors = append(collectionErrors, fmt.Errorf("%s: %w", c.URL, err))

			continue
		}

		logs = append(logs, events...)
	}

	// Return collected events even if some controllers failed
	// Only return error if ALL controllers failed and we have no events
	if len(logs) == 0 && len(collectionErrors) > 0 {
		return nil, collectionErrors[0]
	}

	return &poller.Events{Logs: logs}, nil
}

// Metrics grabs all the measurements from a UniFi controller and returns them.
// Set Filter.Path to a controller URL for a specific controller (or get them all).
func (u *InputUnifi) Metrics(filter *poller.Filter) (*poller.Metrics, error) {
	if u.Disable {
		return nil, nil
	}

	metrics := &poller.Metrics{}

	if filter == nil {
		filter = &poller.Filter{}
	}

	var collectionErrors []error

	// Check if the request is for an existing, configured controller (or all controllers)
	for _, c := range u.Controllers {
		if filter.Path != "" && !strings.EqualFold(c.URL, filter.Path) {
			// continue only if we have a filter path and it doesn't match.
			continue
		}

		m, err := u.collectController(c)
		if err != nil {
			// Log error but continue to next controller
			u.LogErrorf("Failed to collect metrics from controller %s: %v", c.URL, err)
			collectionErrors = append(collectionErrors, fmt.Errorf("%s: %w", c.URL, err))

			// Record controller as down so output plugins can expose the status.
			source := c.URL
			if c.ID != "" {
				source = c.ID
			}

			metrics.ControllerStatuses = append(metrics.ControllerStatuses, poller.ControllerStatus{
				Source: source,
				Up:     false,
			})

			continue
		}

		// Record controller as up.
		source := c.URL
		if c.ID != "" {
			source = c.ID
		}

		if m != nil {
			m.ControllerStatuses = append(m.ControllerStatuses, poller.ControllerStatus{
				Source: source,
				Up:     true,
			})
		}

		metrics = poller.AppendMetrics(metrics, m)
	}

	// If we collected data from at least one controller, return success. ProtectDevices counts:
	// a Protect-only console contributes no devices and no clients, and without it a filtered
	// scrape of one would fall through to the dynamic-controller path and fail.
	if len(metrics.Devices) > 0 || len(metrics.Clients) > 0 || len(metrics.ProtectDevices) > 0 {
		return metrics, nil
	}

	// If all controllers failed and we had errors, return the first error
	if len(collectionErrors) > 0 {
		return metrics, collectionErrors[0]
	}

	if filter.Path == "" || len(metrics.Clients) != 0 {
		return metrics, nil
	}

	if !u.Dynamic {
		return nil, ErrDynamicLookupsDisabled
	}

	// Attempt a dynamic metrics fetch from an unconfigured controller.
	return u.dynamicController(filter)
}

// RawMetrics returns API output from the first configured UniFi controller.
// Adjust filter.Unit to pull from a controller other than the first.
func (u *InputUnifi) RawMetrics(filter *poller.Filter) ([]byte, error) {
	if l := len(u.Controllers); filter.Unit >= l {
		return nil, fmt.Errorf("%d controller(s) configured, '%d': %w", l, filter.Unit, ErrControllerNumNotFound)
	}

	c := u.Controllers[filter.Unit]
	if u.isNill(c) {
		u.Logf("Re-authenticating to UniFi Controller: %s", c.URL)

		if err := u.getUnifi(c); err != nil {
			return nil, fmt.Errorf("re-authenticating to %s: %w", c.URL, err)
		}
	}

	// Every site-scoped kind below needs a Network application. Only the raw-path kind can
	// say anything about a Protect-only console, so answer that and reject the rest plainly
	// rather than returning a confusing empty result.
	if *c.DisableNetwork {
		if filter.Kind == "other" || filter.Kind == "o" {
			return c.Unifi.GetJSON(filter.Path)
		}

		return nil, fmt.Errorf("%s: %w", c.URL, ErrNetworkDisabled)
	}

	if err := u.checkSites(c); err != nil {
		return nil, err
	}

	sites, err := u.getFilteredSites(c)
	if err != nil {
		return nil, err
	}

	switch filter.Kind {
	case "d", "device", "devices":
		return u.getSitesJSON(c, unifi.APIDevicePath, sites)
	case "client", "clients", "c":
		return u.getSitesJSON(c, unifi.APIClientPath, sites)
	case "other", "o":
		return c.Unifi.GetJSON(filter.Path)
	default:
		return []byte{}, ErrNoFilterKindProvided
	}
}

func (u *InputUnifi) getSitesJSON(c *Controller, path string, sites []*unifi.Site) ([]byte, error) {
	allJSON := []byte{}

	for _, s := range sites {
		apiPath := fmt.Sprintf(path, s.Name)
		u.LogDebugf("Returning Path '%s' for site: %s (%s):\n", apiPath, s.Desc, s.Name)

		body, err := c.Unifi.GetJSON(apiPath)
		if err != nil {
			return allJSON, fmt.Errorf("controller: %w", err)
		}

		allJSON = append(allJSON, body...)
	}

	return allJSON, nil
}