syntax = "proto3";
package main;

message BaseMsg {
  string channel = 1;
  bytes payload = 2;
}

message Msg {
  string error = 1;

  enum Command {
    ERROR = 0;
    START = 1;
    SOURCE_CODE_FETCH_RES = 2;
    ONEOF = 100;
  }
  Command command = 2;

  // We avoid creating a message for each command (and use oneof or any types)
  // In order to reduce code in the size of the generated javascript
  // "msg.pb.js". It seems that each new message adds 20k and we want to
  // potentially add many hundreds of commands. Therefore we just prefix command
  // arguments by their name.

  // Start
  string start_cwd = 10;
  repeated string start_argv = 11;
  bool start_debug_flag = 12;
  string start_main_js = 13;  // The contents of dist/main.js
  string start_main_map = 14; // The contents of dist/main.map

  // SOURCE_CODE_FETCH_RES
  // If it's a non-http module, moduleName and filename will be the same.
  // For http modules, moduleName is its resolved http URL, and filename
  // is the location of the locally downloaded source code.
  string source_code_fetch_res_module_name = 30;
  string source_code_fetch_res_filename = 31;
  string source_code_fetch_res_source_code = 32;
  string source_code_fetch_res_output_code = 33; // Non-empty only if cached.

  oneof payload {
    SourceCodeFetchMsg source_code_fetch = 100;
    SourceCodeCacheMsg source_code_cache = 102;
    ExitMsg exit = 103;
    TimerStartMsg timer_start = 104;
    TimerReadyMsg timer_ready = 105;
    TimerClearMsg timer_clear = 106;
  }
}

message SourceCodeFetchMsg {
  string module_specifier = 1;
  string containing_file = 2;
}

message SourceCodeCacheMsg {
  string filename = 1;
  string source_code = 2;
  string output_code = 3;
}

message ExitMsg { int32 code = 1; }

message TimerStartMsg {
  int32 id = 1;
  bool interval = 2;
  int32 duration = 3; // In milliseconds.
}

message TimerReadyMsg {
  int32 id = 1;
  bool done = 2;
}

message TimerClearMsg { int32 id = 1; }