syntax = "proto3";
package main;

message Msg {
  string error = 1;
  oneof payload {
    StartMsg start = 10;
    SourceCodeFetchMsg source_code_fetch = 11;
    SourceCodeFetchResMsg source_code_fetch_res = 12;
    SourceCodeCacheMsg source_code_cache = 13;
    ExitMsg exit = 14;
    TimerStartMsg timer_start = 15;
    TimerReadyMsg timer_ready = 16;
  }
}

message StartMsg {
  string cwd = 1;
  repeated string argv = 2;
  bool debug_flag = 3;
}

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

message SourceCodeFetchResMsg {
  // 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 moduleName = 1;
  string filename = 2;
  string source_code = 3;
  string output_code = 4; // Non-empty only if cached.
}

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;
}