start work on lora ingest app

lora/MeshtasticStream.js

@@ -0,0 +1,61 @@
+import { Transform } from 'stream';
+import { Mesh, Channel, Config, ModuleConfig } from '@meshtastic/protobufs';
+import { fromBinary, create } from '@bufbuild/protobuf';
+
+export class MeshtasticStream extends Transform {
+    constructor(options) {
+        super({ readableObjectMode: true, ...options });
+    }
+    _transform(chunk, encoding, callback) {
+        const dataPacket = fromBinary(Mesh.FromRadioSchema, chunk);
+        let schema = null;
+        switch(dataPacket.payloadVariant.case) {
+            case 'packet':
+                schema = Mesh.MeshPacketSchema;
+                break;
+            case 'nodeInfo':
+                schema = Mesh.NodeInfoSchema;
+                break;
+            case 'myInfo':
+                schema = Mesh.MyNodeInfoSchema;
+                break;
+            case 'deviceuiConfig':
+                // can't find, come back to this
+                break;
+            case 'config':
+                // todo: config has another payloadVariant within it
+                schema = Config.ConfigSchema
+                break;
+            case 'moduleConfig':
+                // todo: config has another payloadVariant within it
+                schema = ModuleConfig.ModuleConfigSchema
+                break;
+            case 'fileInfo':
+                schema = Mesh.FileInfoSchema
+                break;
+            case 'channel':
+                schema = Channel.ChannelSchema
+                break;
+            case 'metadata':
+                schema = Mesh.DeviceMetadataSchema
+                break;
+            case 'configCompleteId':
+                // done sending init data
+                break;
+        }
+        if (schema !== null) {
+            this.push(create(schema, dataPacket.payloadVariant.value));
+        }
+        callback();
+    }
+    _flush(callback) {
+        try {
+          if (this._buffer) {
+            this.push(this._buffer.trim());
+          }
+          callback();
+        } catch (err) {
+          callback(err);
+        }
+    }
+}