Implement Commanding (#6)

Reviewed-on: #6
Co-authored-by: Sergey Savelyev <sergeysav.nn@gmail.com>
Co-committed-by: Sergey Savelyev <sergeysav.nn@gmail.com>

server/proto/core.proto

@@ -48,3 +48,36 @@ service TelemetryService {
     rpc NewTelemetry (TelemetryDefinitionRequest) returns (TelemetryDefinitionResponse);
     rpc InsertTelemetry (stream TelemetryItem) returns (stream TelemetryInsertResponse);
 }
+
+message CommandParameterDefinition {
+    string name = 1;
+    TelemetryDataType data_type = 2;
+}
+
+message CommandDefinitionRequest {
+    string name = 1;
+    repeated CommandParameterDefinition parameters = 2;
+}
+
+message Command {
+    UUID uuid = 1;
+    Timestamp timestamp = 2;
+    map<string, TelemetryValue> parameters = 3;
+}
+
+message CommandResponse {
+    UUID uuid = 1;
+    bool success = 2;
+    string response = 3;
+}
+
+message ClientSideCommand {
+    oneof inner {
+        CommandDefinitionRequest request = 1;
+        CommandResponse response = 2;
+    }
+}
+
+service CommandService {
+    rpc NewCommand (stream ClientSideCommand) returns (stream Command);
+}