Create a simple event shorthand

src/js/events/event.js

@@ -50,6 +50,17 @@ class MatrixEvent extends ElemJS {
 	}
 }
 
+function simpleEvent(filter, render) {
+	return class extends MatrixEvent {
+		render() {
+			super.render()
+			return this.text(render(this.data))
+		}
 
+		static canRender(event) {
+			return filter(event)
+		}
+	}
+}
 
-module.exports = {MatrixEvent}
+module.exports = {MatrixEvent, simpleEvent}

src/js/events/membership.js

@@ -1,31 +1,12 @@
-const {MatrixEvent} = require("./event")
+const {simpleEvent} = require("./event")
+
+const UnknownMembership = simpleEvent((e) => e.type == "m.room.member", (e) => "unknown membership event")
 
 function createMembershipEvent(membership, message) {
-	return class extends MatrixEvent {
-		render() {
-			super.render()
-			return this.text(message(this.data))
+	return simpleEvent((e) => e.type == "m.room.member" && e.content.membership === membership, message)
 }
 
-		static canRender(event) {
-			return event.type == "m.room.member" && event.content.membership == membership
-		}
-
-	}
-}
-class UnknownMembership extends MatrixEvent {
-	render() {
-		super.render()
-		return this.text("Unsupported membership event")
-	}
-
-	static canRender(event) {
-		return event.type == "m.room.member"
-	}
-
-}
-
-const JoinedEvent = createMembershipEvent("join", () => "joined the room")
+const JoinedEvent = createMembershipEvent("join", (e) => {console.log(e); return "joined the room"})
 const InvitedEvent = createMembershipEvent("invite", (e) => `invited ${e.content.displayname} the room`)
 const LeaveEvent = createMembershipEvent("leave", () => "left the room")
 

src/js/events/unknown.js

@@ -1,15 +1,4 @@
-const {MatrixEvent} = require("./event")
-
-class UnknownEvent extends MatrixEvent {
-	render() {
-		super.render()
-		this.text("Cannot render event")
-	}
-
-	static canRender(_event) {
-		return true
-	}
-
-}
-
+const {simpleEvent} = require("./event")
+const UnknownEvent = simpleEvent(() => true, () => "Cannot render event")
+console.log(UnknownEvent)
 module.exports = [UnknownEvent]