// Copyright 2018, Google
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

import "google/api/annotations.proto";

package pyre.proto;

message AuthorizeAccountRequest {}

message AuthorizeAccountResponse {
  // The identifier for the account.
  string account_id = 1;
  // An authorization token to use with all calls, other than
  // b2_authorize_account, that need an Authorization header. This
  // authorization token is valid for at most 24 hours.
  string authorization_token = 2;
  // The base URL to use for all API calls except for uploading and downloading
  // files.
  string api_url = 3;
  // The base URL to use for downloading files.
  string download_url = 4;
  // The recommended size for each part of a large file. We recommend using
  // this part size for optimal upload performance.
  int32 recommended_part_size = 5;
  // The smallest possible size of a part of a large file (except the last
  // one). This is smaller than the recommended part size. If you use it, you
  // may find that it takes longer overall to upload a large file.
  int32 absolute_minimum_part_size = 6;
  int32 minimum_part_size = 7; // alias for recommended_part_size
}

message ListBucketsRequest {
  // The ID of your account.
  string account_id = 1;
  // When specified, the result will be a list containing just this bucket, if
  // it's present in the account, or no buckets if the account does not have a
  // bucket with this ID.
  string bucket_id = 2;
  // When specified, the result will be a list containing just this bucket, if
  // it's present in the account, or no buckets if the account does not have a
  // bucket with this ID.
  string bucket_name = 3;
  // If present, B2 will use it as a filter for bucket types returned in the
  // list buckets response. If not present, only buckets with bucket types
  // "allPublic", "allPrivate" and "snapshot" will be returned. A special
  // filter value of ["all"] will return all bucket types. 
  //
  // If present, it must be in the form of a json array of strings containing
  // valid bucket types in quotes and separated by a comma. Valid bucket types
  // include "allPrivate", "allPublic", "snapshot", and other values added in
  // the future. 
  //
  // A bad request error will be returned if "all" is used with other bucket
  // types, this field is empty, or invalid bucket types are requested.
  repeated string bucket_types = 4;
}

message LifecycleRule {
  // After a file is uploaded, the number of days before it can be hidden.
  int32 days_from_uploading_to_hiding = 1;
  // After a file is hidden, the number of days before it can be deleted.
  int32 days_from_hiding_to_deleting = 2;
  // The rule applies to files whose names start with this prefix.
  string file_name_prefix = 3;
}

message CorsRule {
  // A name for humans to recognize the rule in a user interface. Names must be
  // unique within a bucket. Names can consist of upper-case and lower-case
  // English letters, numbers, and "-". No other characters are allowed. A name
  // must be at least 6 characters long, and can be at most 50 characters long.
  // These are all allowed names: myPhotosSite, allowAnyHttps,
  // backblaze-images. Names that start with "b2-" are reserved for Backblaze
  // use.
  string cors_rule_name = 1;
  // A non-empty list specifying which origins the rule covers. Each value may
  // have one of many formats:
  //
  //  * The origin can be fully specified, such as http://www.example.com:8180
  //  or https://www.example.com:4433.
  //
  //  * The origin can omit a default port, such as https://www.example.com.
  //
  //  * The origin may have a single '*' as part of the domain name, such as
  //  https://*.example.com, https://*:8443 or https://*.
  //
  //  * The origin may be 'https' to match any origin that uses HTTPS. (This is
  //  broader than 'https://*' because it matches any port.)
  //  
  //  * Finally, the origin can be a single '*' to match any origin.
  //
  // If any entry is "*", it must be the only entry. There can be at most one
  // "https" entry and no entry after it may start with "https:".
  repeated string allowed_origins = 2;
  // A list specifying which operations the rule allows. At least one value
  // must be specified. All values must be from the following list. More values
  // may be added to this list at any time.
  //
  // b2_download_file_by_name
  // b2_download_file_by_id
  // b2_upload_file
  // b2_upload_part
  repeated string allowed_operations = 3;
  // If present, this is a list of headers that are allowed in a pre-flight
  // OPTIONS's request's Access-Control-Request-Headers header value. Each
  // value may have one of many formats:
  //
  //  * It may be a complete header name, such as x-bz-content-sha1.
  //
  //  * It may end with an asterisk, such as x-bz-info-*.
  // 
  //  * Finally, it may be a single '*' to match any header.
  //
  // If any entry is "*", it must be the only entry in the list. If this list
  // is missing, it is be treated as if it is a list with no entries.
  repeated string allowed_headers = 4;
  // If present, this is a list of headers that may be exposed to an
  // application inside the client (eg. exposed to Javascript in a browser).
  // Each entry in the list must be a complete header name (eg.
  // "x-bz-content-sha1"). If this list is missing or empty, no headers will be
  // exposed.
  repeated string expose_headers = 5;
  // This specifies the maximum number of seconds that a browser may cache the
  // response to a preflight request. The value must not be negative and it
  // must not be more than 86,400 seconds (one day).
  int32 max_age_seconds = 6;
}

message Bucket {
  string account_id = 1;
  string bucket_id = 2;
  string bucket_name = 3;
  string bucket_type = 4;
  map<string, string> bucket_info = 5;
  repeated CorsRule cores_rules = 6;
  repeated LifecycleRule lifecycle_rules = 7;
  int32 revision = 8;
}

message ListBucketsResponse {
  repeated Bucket buckets = 1;
}

message GetUploadUrlRequest {
  string bucket_id = 1;
}

message GetUploadUrlResponse {
  string bucket_id = 1;
  string upload_url = 2;
  string authorization_token = 3;
}

message UploadFileResponse {
  string file_id = 1;
  string file_name = 2;
  string account_id = 3;
  string bucket_id = 4;
  int32 content_length = 5;
  string content_sha1 = 6;
  string content_type = 7;
  map<string, string> file_info = 8;
  string action = 9;
  int64 upload_timestamp = 10;
}

message StartLargeFileRequest {
  string bucket_id = 1;
  string file_name = 2;
  string content_type = 3;
  map<string, string> file_info = 4;
}

message StartLargeFileResponse {
  string file_id = 1;
  string file_name = 2;
  string account_id = 3;
  string bucket_id = 4;
  string content_type = 5;
  map<string, string> file_info = 6;
  int64 upload_timestamp = 7;
}

message GetUploadPartUrlRequest {
  string file_id = 1;
}

message GetUploadPartUrlResponse {
  string file_id = 1;
  string upload_url = 2;
  string authorization_token = 3;
}

message FinishLargeFileRequest {
  string file_id = 1;
  repeated string part_sha1_array = 2;
  // string sha1 = 3;
}

message FinishLargeFileResponse {
  string file_id = 1;
  string file_name = 2;
  string account_id = 3;
  string bucket_id = 4;
  int64 content_length = 5;
  string content_sha1 = 6; // always "none"
  string content_type = 7;
  map<string, string> file_info = 8;
  string action = 9;
  int64 upload_timestamp = 10;
}

message ListFileVersionsRequest {
  string bucket_id = 1;
  string start_file_name = 2;
  string start_file_id = 3;
  int32 max_file_count = 4;
  string prefix = 5;
  string delimiter = 6;
}

message ListFileVersionsResponse {
  repeated File files = 1;
  string next_file_name = 2;
  string next_file_id = 3;
}

message File {
  string file_id = 1;
  string file_name = 2;
  int64 content_length = 3;
  string content_type = 4;
  string content_sha1 = 5;
  map<string, string> file_info = 6;
  string action = 7;
  int64 size = 8;
  int64 upload_timestamp = 9;
}

service PyreService {
  // Used to log in to the B2 API. Returns an authorization token that can be
  // used for account-level operations, and a URL that should be used as the
  // base URL for subsequent API calls.
  rpc AuthorizeAccount(AuthorizeAccountRequest) returns (AuthorizeAccountResponse) {
    option (google.api.http) = {
      get: "/b2api/v1/b2_authorize_account"
    };
  }

  // Lists buckets associated with an account, in alphabetical order by bucket
  // name.
  rpc ListBuckets(ListBucketsRequest) returns (ListBucketsResponse) {
    option (google.api.http) = {
      post: "/b2api/v1/b2_list_buckets"
      body: "*"
    };
  }

  // Creates a new bucket. A bucket belongs to the account used to create it.
  //
  // Buckets can be named. The name must be globally unique. No account can use
  // a bucket with the same name. Buckets are assigned a unique bucketId which
  // is used when uploading, downloading, or deleting files.
  //
  // There is a limit of 100 buckets per account.
  rpc CreateBucket(Bucket) returns (Bucket) {
    option (google.api.http) = {
      post: "/b2api/v1/b2_create_bucket"
      body: "*"
    };
  }

  // Deletes the bucket specified. Only buckets that contain no version of any
  // files can be deleted.
  rpc DeleteBucket(Bucket) returns (Bucket) {
    option (google.api.http) = {
      post: "/b2api/v1/b2_delete_bucket"
      body: "*"
    };
  }

  rpc GetUploadUrl(GetUploadUrlRequest) returns (GetUploadUrlResponse) {
    option (google.api.http) = {
      post: "/b2api/v1/b2_get_upload_url"
      body: "*"
    };
  }

  // Prepares for uploading the parts of a large file.
  rpc StartLargeFile(StartLargeFileRequest) returns (StartLargeFileResponse) {
    option (google.api.http) = {
      post: "/b2api/v1/b2_start_large_file"
      body: "*"
    };
  }

  // Gets an URL to use for uploading parts of a large file.
  rpc GetUploadPartUrl(GetUploadPartUrlRequest) returns (GetUploadPartUrlResponse) {
    option (google.api.http) = {
      post: "/b2api/v1/b2_get_upload_part_url"
      body: "*"
    };
  }

  // Converts the parts that have been uploaded into a single B2 file.
  rpc FinishLargeFile(FinishLargeFileRequest) returns (FinishLargeFileResponse) {
    option (google.api.http) = {
      post: "/b2api/v1/b2_finish_large_file"
      body: "*"
    };
  }

  // Lists all of the versions of all of the files contained in one bucket, in
  // alphabetical order by file name, and by reverse of date/time uploaded for
  // versions of files with the same name.
  rpc ListFileVersions(ListFileVersionsRequest) returns (ListFileVersionsResponse) {
    option (google.api.http) = {
      post: "/b2api/v1/b2_list_file_versions"
      body: "*"
    };
  }
}