syntax = "proto3";

package space;

option go_package = "./proto;space";

service Space {
	rpc Create(CreateRequest) returns (CreateResponse) {}
	rpc Update(UpdateRequest) returns (UpdateResponse) {}
	rpc Delete(DeleteRequest) returns (DeleteResponse) {}
	rpc List(ListRequest) returns (ListResponse) {}
	rpc Head(HeadRequest) returns (HeadResponse) {}
	rpc Read(ReadRequest) returns (ReadResponse) {}
	rpc Download(DownloadRequest) returns (DownloadResponse) {}
	rpc Upload(UploadRequest) returns (UploadResponse) {}
}

// Create an object. Returns error if object with this name already exists. If you want to update an existing object use the `Update` endpoint
// You need to send the request as a multipart/form-data rather than the usual application/json
// with each parameter as a form field.
message CreateRequest {
	// The contents of the object
	bytes object = 1;
	// The name of the object. Use forward slash delimiter to implement a nested directory-like structure e.g. images/foo.jpg
	string name = 2;
	// Who can see this object? "public" or "private", defaults to "private"
	string visibility = 3;
}

message CreateResponse {
	// A public URL to access the object if visibility is "public"
	string url = 1;
}

// Update an object. If an object with this name does not exist, creates a new one.
// You need to send the request as a multipart/form-data rather than the usual application/json
// with each parameter as a form field.
message UpdateRequest {
	// The contents of the object
	bytes object = 1;
	// The name of the object. Use forward slash delimiter to implement a nested directory-like structure e.g. images/foo.jpg
	string name = 2;
	// Who can see this object? "public" or "private", defaults to "private"
	string visibility = 3;
}

message UpdateResponse {
	// A public URL to access the object if visibility is "public"
	string url = 1;
}

// Delete an object from space
message DeleteRequest {
	// Name of the object
	string name = 1;
}

message DeleteResponse {}

// List the objects in space
message ListRequest {
	// optional prefix for the name e.g. to return all the objects in the images directory pass images/
	string prefix = 1;
}

message ListResponse {
	repeated ListObject objects = 1;
}

message ListObject {
	string name = 1;
	// when was this last modified
	string modified = 2;
	string url = 3;
	string visibility = 4;
	string created = 5;
}

// Retrieve meta information about an object
message HeadRequest {
	// name of the object
	string name = 1;
}

message HeadResponse {
	HeadObject object = 1;
}

message HeadObject {
	string name = 1;
	// when was this last modified
	string modified = 2;
	// when was this created
	string created = 3;
	// is this public or private
	string visibility = 4;
	// URL to access the object if it is public
	string url = 5;
}

message Object {
	// name of object
	string name = 1;
	// when was this last modified
	string modified = 2;
	// when was this created
	string created = 3;
	// is this public or private
	string visibility = 4;
	// URL to access the object if it is public
	string url = 5;
	// the data within the object
	bytes data = 6;
}

// Read an object in space
message ReadRequest {
	// name of the object
	string name = 1;
}

// Returns the raw object
message ReadResponse {
	// The object itself
	Object object = 1;
}

// Download an object via a presigned url
message DownloadRequest {
	// name of object
	string name = 1;
}

message DownloadResponse {
	// presigned url
	string url = 2;
}

// Upload a large object. Returns a time limited presigned URL to be used for uploading the object
message UploadRequest {
	string name = 1;
	// is this object public or private
	string visibility = 2;
}

message UploadResponse {
	// a presigned url to be used for uploading
	string url = 1;
}