syntax = "proto3";
package semantic;

message HealthCheckRequest {
  string service = 1;
}

message HealthCheckResponse {
  enum ServingStatus {
    UNKNOWN = 0;
    SERVING = 1;
    NOT_SERVING = 2;
  }
  ServingStatus status = 1;
}

service SemanticAPI {
  rpc HealthCheck(HealthCheckRequest) returns (HealthCheckResponse);
  rpc FetchSummaries (SummariesRequest) returns (SummariesResponse) {}
  rpc ParseBlobs (ParseRequest) returns (ParseResponse) {}
}

message SummariesRequest  {
  repeated BlobPair blobPairs = 1;
}

message ParseRequest {
  repeated Blob source = 1;
}

message BlobPair {
  Blob before = 1;
  Blob after = 2;
}

message Blob {
  string source = 1;
  string path = 2;
  string language = 3;
}

message SummariesResponse {
  repeated Summary changes = 1;
  repeated Error errors = 2;
}

message ParseResponse {
  bytes json_tree = 1;
  repeated Error errors = 2;
}

message Summary {
  string categoryName = 1;
  string termName = 2;
  Span span = 3;
  string changeType = 4;
}

message Error {
  string error = 1;
  Span span = 2;
  string language = 3;
}

message Span {
  Pos start = 1;
  Pos end = 2;
}

message Pos {
  int32 line = 1;
  int32 column = 2;
}