Moved server packages to a separate folder

server/middleware/OpenGraph.go

@@ -0,0 +1,24 @@
+package middleware
+
+import (
+	"github.com/aerogo/aero"
+	"github.com/animenotifier/notify.moe/arn"
+)
+
+// OpenGraphContext is a context with open graph data.
+type OpenGraphContext struct {
+	aero.Context
+	*arn.OpenGraph
+}
+
+// OpenGraph middleware modifies the context to be an OpenGraphContext.
+func OpenGraph(next aero.Handler) aero.Handler {
+	return func(ctx aero.Context) error {
+		openGraphCtx := &OpenGraphContext{
+			Context:   ctx,
+			OpenGraph: nil,
+		}
+
+		return next(openGraphCtx)
+	}
+}