fix: remove events import from zoraxy_plugin

The import, when the code is copied to develop a plugin, results an invalid path.

Fixing the path manually as a plugin developer is easy, but it shouldn't be necessary.
To fix that, the type is replaced with a string in zoraxy_plugin.IntroSpect and validation is added to lifecycle.go to ensure all subscribed events are valid.

A downside is that the list of validEventNames has to be updated whenever a new event is created, but this is mitigated by placing definitions of that list and the actual event names right next to each other.

src/mod/plugins/lifecycle.go

@@ -157,6 +157,10 @@ func (m *Manager) StartPlugin(pluginID string) error {
 	if thisPlugin.Spec.SubscriptionsEvents != nil {
 		for eventName := range thisPlugin.Spec.SubscriptionsEvents {
 			eventType := events.EventName(eventName)
+			if !eventType.IsValid() {
+				m.Log("Invalid event name: "+string(eventName), nil)
+				continue
+			}
 			err := eventsystem.Publisher.RegisterSubscriberToEvent(thisPlugin, eventType)
 			if err != nil {
 				m.Log("Failed to subscribe plugin "+thisPlugin.Spec.Name+" to event "+string(eventName), err)

src/mod/plugins/zoraxy_plugin/events/events.go

@@ -32,6 +32,19 @@ const (
 	// Add more event types as needed
 )
 
+var validEventNames = map[EventName]bool{
+	EventBlacklistedIPBlocked: true,
+	EventBlacklistToggled:     true,
+	EventAccessRuleCreated:    true,
+	// Add more event types as needed
+	// NOTE: Keep up-to-date with event names specified above
+}
+
+// Check if the event name is valid
+func (name EventName) IsValid() bool {
+	return validEventNames[name]
+}
+
 // BlacklistedIPBlockedEvent represents an event when a blacklisted IP is blocked
 type BlacklistedIPBlockedEvent struct {
 	IP           string `json:"ip"`

src/mod/plugins/zoraxy_plugin/zoraxy_plugin.go

@@ -5,8 +5,6 @@ import (
 	"fmt"
 	"os"
 	"strings"
-
-	"imuslab.com/zoraxy/mod/plugins/zoraxy_plugin/events"
 )
 
 /*
@@ -104,8 +102,8 @@ type IntroSpect struct {
 	UIPath string `json:"ui_path"` //UI path of your plugin (e.g. /ui), will proxy the whole subpath tree to Zoraxy Web UI as plugin UI
 
 	/* Subscriptions Settings */
-	SubscriptionPath    string                      `json:"subscription_path"`    //Subscription event path of your plugin (e.g. /notifyme), a POST request with SubscriptionEvent as body will be sent to this path when the event is triggered
-	SubscriptionsEvents map[events.EventName]string `json:"subscriptions_events"` //Subscriptions events of your plugin, paired with comments describing how the event is used, see Zoraxy documentation for more details
+	SubscriptionPath    string            `json:"subscription_path"`    //Subscription event path of your plugin (e.g. /notifyme), a POST request with SubscriptionEvent as body will be sent to this path when the event is triggered
+	SubscriptionsEvents map[string]string `json:"subscriptions_events"` //Subscriptions events of your plugin, paired with comments describing how the event is used, see Zoraxy documentation for more details
 
 	/* API Access Control */
 	PermittedAPIEndpoints []PermittedAPIEndpoint `json:"permitted_api_endpoints"` //List of API endpoints this plugin can access, and a description of why the plugin needs to access this endpoint