Add a few more event triggers, to be triggered only once

cmd/gochan/main.go

@@ -9,6 +9,7 @@ import (
 	"syscall"
 
 	"github.com/gochan-org/gochan/pkg/config"
+	"github.com/gochan-org/gochan/pkg/events"
 
 	"github.com/gochan-org/gochan/pkg/gcutil"
 
@@ -45,6 +46,9 @@ func main() {
 		gcutil.LogFatal().Err(err).Msg("failed loading plugins")
 	}
 
+	events.TriggerEvent("startup")
+	defer events.TriggerEvent("shutdown")
+
 	if err = gcsql.ConnectToDB(
 		systemCritical.DBhost, systemCritical.DBtype, systemCritical.DBname,
 		systemCritical.DBusername, systemCritical.DBpassword, systemCritical.DBprefix,
@@ -52,11 +56,13 @@ func main() {
 		fmt.Println("Failed to connect to the database:", err.Error())
 		gcutil.LogFatal().Err(err).Msg("Failed to connect to the database")
 	}
+	events.TriggerEvent("db-connected")
 	fmt.Println("Connected to database")
 	if err = gcsql.CheckAndInitializeDatabase(systemCritical.DBtype); err != nil {
 		fmt.Println("Failed to initialize the database:", err.Error())
 		gcutil.LogFatal().Err(err).Msg("Failed to initialize the database")
 	}
+	events.TriggerEvent("db-initialized")
 	parseCommandLine()
 	serverutil.InitMinifier()
 

events_triggered.md

@@ -1,7 +1,20 @@
 # Events
 This is a list of events that gochan may trigger at some point, that can be used in the plugin system.
 
+- **db-connected**
+	- Triggered after gochan successfully connects to the database but before it is checked and initialized (db version checking, provisisioning, etc)
+
+- **db-initialized**
+	- Triggered after the database is successfully initialized (db version checking, provisioning, etc)
+
 - **incoming-upload**
 	- Triggered by the `gcsql` package when an upload is attached to a post. It is triggered before the upload is entered in the database
+
+- **shutdown**
+	- Triggered when gochan is about to shut down, in `main()` as a deferred call
+
+- **startup**
+	- Triggered when gochan first starts after its plugin system is initialized. This is (or at least should be) only triggered once.
+
 - **upload-saved**
 	- Triggered by the `posting` package when an upload is saved to the disk but before thumbnails are generated.