Add message-pre-format event trigger

cmd/gochan/editpost.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/gochan-org/gochan/pkg/building"
 	"github.com/gochan-org/gochan/pkg/config"
+	"github.com/gochan-org/gochan/pkg/events"
 	"github.com/gochan-org/gochan/pkg/gcsql"
 	"github.com/gochan-org/gochan/pkg/gctemplates"
 	"github.com/gochan-org/gochan/pkg/gcutil"
@@ -193,6 +194,26 @@ func editPost(checkedPosts []int, editBtn string, doEdit string, writer http.Res
 				}
 			}
 		} else {
+			var recovered bool
+			_, err, recovered = events.TriggerEvent("message-pre-format", post)
+			if recovered {
+				errEv.Caller().
+					Str("triggeredEvent", "message-pre-format").
+					Msg("Recovered from a panic in event handler")
+				server.ServeError(writer, "Recovered from a panic in an event handler (message-pre-format)", wantsJSON, map[string]interface{}{
+					"postid": post.ID,
+				})
+				return
+			}
+			if err != nil {
+				errEv.Err(err).Caller().
+					Str("triggeredEvent", "message-pre-format").
+					Send()
+				server.ServeError(writer, err.Error(), wantsJSON, map[string]interface{}{
+					"postid": post.ID,
+				})
+				return
+			}
 			if err = post.UpdateContents(
 				request.FormValue("editemail"),
 				request.FormValue("editsubject"),

events_triggered.md

@@ -10,6 +10,9 @@ This is a list of events that gochan may trigger at some point, that can be used
 - **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
 
+- **message-pre-format**
+	- Triggered when an incoming post or post edit is about to be formatted
+
 - **shutdown**
 	- Triggered when gochan is about to shut down, in `main()` as a deferred call
 

pkg/posting/post.go

@@ -13,6 +13,7 @@ import (
 
 	"github.com/gochan-org/gochan/pkg/building"
 	"github.com/gochan-org/gochan/pkg/config"
+	"github.com/gochan-org/gochan/pkg/events"
 	"github.com/gochan-org/gochan/pkg/gcsql"
 	"github.com/gochan-org/gochan/pkg/gcutil"
 	"github.com/gochan-org/gochan/pkg/server"
@@ -160,6 +161,22 @@ func MakePost(writer http.ResponseWriter, request *http.Request) {
 		return
 	}
 
+	_, err, recovered := events.TriggerEvent("message-pre-format", post)
+	if recovered {
+		errEv.Caller().
+			Str("triggeredEvent", "message-pre-format").
+			Msg("Recovered from a panic in event handler")
+		server.ServeError(writer, "Recovered from a panic in an event handler (message-pre-format)", wantsJSON, nil)
+		return
+	}
+	if err != nil {
+		errEv.Err(err).Caller().
+			Str("triggeredEvent", "message-pre-format").
+			Send()
+		server.ServeError(writer, err.Error(), wantsJSON, nil)
+		return
+	}
+
 	post.Message = FormatMessage(post.MessageRaw, postBoard.Dir)
 	password := request.FormValue("postpassword")
 	if password == "" {