some nodes are spamming map reports at a high rate. we don't need them

src/mqtt.js

@@ -406,6 +406,21 @@ client.on("message", async (topic, message) => {
             }
 
             try {
+
+                // find an existing map with duplicate information created in the last 60 seconds
+                const existingDuplicateMapReport = await prisma.mapReport.findFirst({
+                    where: {
+                        node_id: envelope.packet.from,
+                        long_name: mapReport.longName,
+                        short_name: mapReport.shortName,
+                        created_at: {
+                            gte: new Date(Date.now() - 60000), // created in the last 60 seconds
+                        },
+                    }
+                });
+
+                // create map report if no duplicates found
+                if(!existingDuplicateMapReport){
                     await prisma.mapReport.create({
                         data: {
                             node_id: envelope.packet.from,
@@ -424,6 +439,8 @@ client.on("message", async (topic, message) => {
                             num_online_local_nodes: mapReport.numOnlineLocalNodes,
                         },
                     });
+                }
+
             } catch (e) {
                 console.error(e);
             }