syntax = "proto3";
package filesync;

option go_package = "commonfile/fileproto";

enum ErrCodes {
    Unexpected = 0;
    CIDNotFound = 1;
    ErrorOffset = 200;
}

service File {
    // BlockGet gets one block from a server
    rpc BlockGet(BlockGetRequest) returns (BlockGetResponse);
    // BlockPush pushes one block to a server
    rpc BlockPush(BlockPushRequest) returns (BlockPushResponse);
    // BlocksCheck checks is CIDs exists
    rpc BlocksCheck(BlocksCheckRequest) returns (BlocksCheckResponse);
    // BlocksBind binds CIDs to space
    rpc BlocksBind(BlocksBindRequest) returns (BlocksBindResponse);
    // FilesDelete deletes files by id
    rpc FilesDelete(FilesDeleteRequest) returns (FilesDeleteResponse);
    // FileCheck checks file CIDs and children for exists
    rpc FilesCheck(FilesCheckRequest) returns (FilesCheckResponse);
    // Check checks the connection and credentials
    rpc Check(CheckRequest) returns (CheckResponse);
    // SpaceInfo returns usage, limit, etc about space
    rpc SpaceInfo(SpaceInfoRequest) returns (SpaceInfoResponse);
}

message BlockGetRequest {
    string spaceId = 1;
    bytes cid = 2;
}

message BlockGetResponse {
    bytes cid = 1;
    bytes data = 2;
}

message BlockPushRequest {
    string spaceId = 1;
    string fileId = 2;
    bytes cid = 3;
    bytes data = 4;
}

message BlockPushResponse {}

message BlocksDeleteRequest {
    string spaceId = 1;
    repeated bytes cids = 2;
}

message BlocksDeleteResponse {}


message BlocksCheckRequest {
    string spaceId = 1;
    repeated bytes cids = 2;
}

message BlocksCheckResponse {
    repeated BlockAvailability blocksAvailability = 1;
}

message BlockAvailability {
    bytes cid = 1;
    AvailabilityStatus status = 2;
}

enum AvailabilityStatus {
    NotExists = 0;
    Exists = 1;
    ExistsInSpace = 2;
}

message BlocksBindRequest {
    string spaceId = 1;
    string fileId = 2;
    repeated bytes cids = 3;
}

message BlocksBindResponse {}


message FilesDeleteRequest {
    string spaceId = 1;
    repeated bytes fileIds = 2;
}

message FilesDeleteResponse {}

message FilesCheckRequest {
    string spaceId = 1;
    repeated bytes fileIds = 2;
}

message FilesCheckResponse {
    repeated BlockAvailability blocksAvailability = 1;
}

message CheckRequest {}

message CheckResponse {
    repeated string spaceIds = 1;
    bool allowWrite = 2;
}

message SpaceInfoRequest {
    string spaceId = 1;
}

message SpaceInfoResponse {
    uint64 limitBytes = 1;
    uint64 usageBytes = 2;
    uint64 cidsCount = 3;
    uint64 filesCount = 4;
}