syntax = "proto3";

package memos.api.v1;

import "google/api/annotations.proto";
import "google/api/client.proto";
import "google/api/field_behavior.proto";
import "google/api/resource.proto";
import "google/protobuf/empty.proto";
import "google/protobuf/field_mask.proto";

option go_package = "gen/api/v1";

// SpaceService manages collaborative spaces and their memberships.
service SpaceService {
  // CreateSpace creates a space and makes the authenticated caller its first
  // administrator.
  rpc CreateSpace(CreateSpaceRequest) returns (Space) {
    option (google.api.http) = {
      post: "/api/v1/spaces"
      body: "space"
    };
    option (google.api.method_signature) = "space";
  }

  // ListSpaces lists spaces of which the authenticated caller is a member.
  rpc ListSpaces(ListSpacesRequest) returns (ListSpacesResponse) {
    option (google.api.http) = {get: "/api/v1/spaces"};
    option (google.api.method_signature) = "";
  }

  // GetSpace gets a space of which the authenticated caller is a member.
  rpc GetSpace(GetSpaceRequest) returns (Space) {
    option (google.api.http) = {get: "/api/v1/{name=spaces/*}"};
    option (google.api.method_signature) = "name";
  }

  // UpdateSpace updates space metadata.
  rpc UpdateSpace(UpdateSpaceRequest) returns (Space) {
    option (google.api.http) = {
      patch: "/api/v1/{space.name=spaces/*}"
      body: "space"
    };
    option (google.api.method_signature) = "space,update_mask";
  }

  // DeleteSpace permanently deletes a space and every memo currently placed
  // in it. It never follows memo relations to other memos.
  rpc DeleteSpace(DeleteSpaceRequest) returns (google.protobuf.Empty) {
    option (google.api.http) = {delete: "/api/v1/{name=spaces/*}"};
    option (google.api.method_signature) = "name";
  }

  // CreateSpaceInvitation invites an existing active user to a space.
  rpc CreateSpaceInvitation(CreateSpaceInvitationRequest) returns (SpaceInvitation) {
    option (google.api.http) = {
      post: "/api/v1/{parent=spaces/*}/invitations"
      body: "space_invitation"
    };
    option (google.api.method_signature) = "parent,space_invitation";
  }

  // ListSpaceInvitations lists the pending invitations for a space.
  rpc ListSpaceInvitations(ListSpaceInvitationsRequest) returns (ListSpaceInvitationsResponse) {
    option (google.api.http) = {get: "/api/v1/{parent=spaces/*}/invitations"};
    option (google.api.method_signature) = "parent";
  }

  // ListUserSpaceInvitations lists the authenticated user's pending space invitations.
  rpc ListUserSpaceInvitations(ListUserSpaceInvitationsRequest) returns (ListUserSpaceInvitationsResponse) {
    option (google.api.http) = {get: "/api/v1/{parent=users/*}/spaceInvitations"};
    option (google.api.method_signature) = "parent";
  }

  // GetSpaceInvitation gets one pending invitation.
  rpc GetSpaceInvitation(GetSpaceInvitationRequest) returns (SpaceInvitation) {
    option (google.api.http) = {get: "/api/v1/{name=spaces/*/invitations/*}"};
    option (google.api.method_signature) = "name";
  }

  // DeleteSpaceInvitation revokes a pending invitation.
  rpc DeleteSpaceInvitation(DeleteSpaceInvitationRequest) returns (google.protobuf.Empty) {
    option (google.api.http) = {delete: "/api/v1/{name=spaces/*/invitations/*}"};
    option (google.api.method_signature) = "name";
  }

  // AcceptSpaceInvitation accepts a pending invitation and creates a membership.
  rpc AcceptSpaceInvitation(AcceptSpaceInvitationRequest) returns (SpaceMember) {
    option (google.api.http) = {
      post: "/api/v1/{name=spaces/*/invitations/*}:accept"
      body: "*"
    };
    option (google.api.method_signature) = "name";
  }

  // DeclineSpaceInvitation declines a pending invitation.
  rpc DeclineSpaceInvitation(DeclineSpaceInvitationRequest) returns (google.protobuf.Empty) {
    option (google.api.http) = {
      post: "/api/v1/{name=spaces/*/invitations/*}:decline"
      body: "*"
    };
    option (google.api.method_signature) = "name";
  }

  // ListSpaceMembers lists the members of a space.
  rpc ListSpaceMembers(ListSpaceMembersRequest) returns (ListSpaceMembersResponse) {
    option (google.api.http) = {get: "/api/v1/{parent=spaces/*}/members"};
    option (google.api.method_signature) = "parent";
  }

  // GetSpaceMember gets one membership in a space.
  rpc GetSpaceMember(GetSpaceMemberRequest) returns (SpaceMember) {
    option (google.api.http) = {get: "/api/v1/{name=spaces/*/members/*}"};
    option (google.api.method_signature) = "name";
  }

  // UpdateSpaceMember changes a member's space role.
  rpc UpdateSpaceMember(UpdateSpaceMemberRequest) returns (SpaceMember) {
    option (google.api.http) = {
      patch: "/api/v1/{space_member.name=spaces/*/members/*}"
      body: "space_member"
    };
    option (google.api.method_signature) = "space_member,update_mask";
  }

  // DeleteSpaceMember removes a member. A member may delete their own
  // membership to leave the space.
  rpc DeleteSpaceMember(DeleteSpaceMemberRequest) returns (google.protobuf.Empty) {
    option (google.api.http) = {delete: "/api/v1/{name=spaces/*/members/*}"};
    option (google.api.method_signature) = "name";
  }
}

// Space is a collaboration boundary for placed memos.
message Space {
  option (google.api.resource) = {
    type: "memos.api.v1/Space"
    pattern: "spaces/{space}"
    name_field: "name"
    singular: "space"
    plural: "spaces"
  };

  // The resource name of the space. Format: spaces/{space}.
  string name = 1 [(google.api.field_behavior) = IDENTIFIER];

  // Required. The human-readable title.
  string title = 2 [(google.api.field_behavior) = REQUIRED];

  // Optional. A description of the space.
  string description = 3 [(google.api.field_behavior) = OPTIONAL];

  // Output only. The authenticated user's membership role in this space.
  // ROLE_UNSPECIFIED when this Space is exposed as metadata-only.
  SpaceMember.Role current_user_role = 4 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The number of accepted members in this space. Pending
  // invitations are excluded. Zero when this Space is exposed as metadata-only.
  int32 member_count = 5 [(google.api.field_behavior) = OUTPUT_ONLY];
}

// SpaceMember is a user's membership and governance role in a space.
message SpaceMember {
  option (google.api.resource) = {
    type: "memos.api.v1/SpaceMember"
    pattern: "spaces/{space}/members/{member}"
    name_field: "name"
    singular: "spaceMember"
    plural: "spaceMembers"
  };

  enum Role {
    ROLE_UNSPECIFIED = 0;
    ADMIN = 1;
    USER = 2;
  }

  // The resource name. Format: spaces/{space}/members/{username}.
  string name = 1 [(google.api.field_behavior) = IDENTIFIER];

  // Required. The member user. Format: users/{username}.
  string user = 2 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/User"}
  ];

  // Required. The member's role within this space.
  Role role = 3 [(google.api.field_behavior) = REQUIRED];
}

// SpaceInvitation is a pending invitation for an existing user to join a space.
message SpaceInvitation {
  option (google.api.resource) = {
    type: "memos.api.v1/SpaceInvitation"
    pattern: "spaces/{space}/invitations/{invitation}"
    name_field: "name"
    singular: "spaceInvitation"
    plural: "spaceInvitations"
  };

  // The resource name. Format: spaces/{space}/invitations/{username}.
  string name = 1 [(google.api.field_behavior) = IDENTIFIER];

  // Required. The invited user. Format: users/{username}.
  string invitee = 2 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/User"}
  ];

  // Required. The role the user will receive after accepting the invitation.
  SpaceMember.Role role = 3 [(google.api.field_behavior) = REQUIRED];

  // Output only. The Space the user is invited to. This lets an invitee
  // understand the invitation without granting membership-based GetSpace access.
  Space space = 4 [(google.api.field_behavior) = OUTPUT_ONLY];
}

message CreateSpaceRequest {
  // Required. The space to create.
  Space space = 1 [(google.api.field_behavior) = REQUIRED];

  // Optional. The space UID to use for this space.
  // If empty, a canonical UUID v4 will be generated.
  // Format: ^[a-zA-Z0-9]([a-zA-Z0-9-]{0,34}[a-zA-Z0-9])?$
  string space_id = 2 [(google.api.field_behavior) = OPTIONAL];
}

message ListSpacesRequest {
  // Optional. The maximum number of spaces to return.
  int32 page_size = 1 [(google.api.field_behavior) = OPTIONAL];

  // Optional. A token from a previous ListSpaces response.
  string page_token = 2 [(google.api.field_behavior) = OPTIONAL];
}

message ListSpacesResponse {
  repeated Space spaces = 1;
  string next_page_token = 2;
}

message GetSpaceRequest {
  // Required. The resource name of the space.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Space"}
  ];
}

message UpdateSpaceRequest {
  // Required. The space with updated values.
  Space space = 1 [(google.api.field_behavior) = REQUIRED];

  // Required. The fields to update: title or description.
  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = REQUIRED];
}

message DeleteSpaceRequest {
  // Required. The resource name of the space.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Space"}
  ];
}

message CreateSpaceInvitationRequest {
  // Required. The parent space. Format: spaces/{space}.
  string parent = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {child_type: "memos.api.v1/SpaceInvitation"}
  ];

  // Required. The invitation to create.
  SpaceInvitation space_invitation = 2 [(google.api.field_behavior) = REQUIRED];
}

message ListSpaceInvitationsRequest {
  // Required. The parent space. Format: spaces/{space}.
  string parent = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {child_type: "memos.api.v1/SpaceInvitation"}
  ];

  // Optional. The maximum number of invitations to return.
  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];

  // Optional. A token from a previous ListSpaceInvitations response.
  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
}

message ListSpaceInvitationsResponse {
  repeated SpaceInvitation space_invitations = 1;
  string next_page_token = 2;
}

message ListUserSpaceInvitationsRequest {
  // Required. The authenticated user. Format: users/{username}.
  string parent = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/User"}
  ];

  // Optional. The maximum number of invitations to return.
  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];

  // Optional. A token from a previous ListUserSpaceInvitations response.
  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
}

message ListUserSpaceInvitationsResponse {
  repeated SpaceInvitation space_invitations = 1;
  string next_page_token = 2;
}

message GetSpaceInvitationRequest {
  // Required. Format: spaces/{space}/invitations/{username}.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/SpaceInvitation"}
  ];
}

message DeleteSpaceInvitationRequest {
  // Required. Format: spaces/{space}/invitations/{username}.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/SpaceInvitation"}
  ];
}

message AcceptSpaceInvitationRequest {
  // Required. Format: spaces/{space}/invitations/{username}.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/SpaceInvitation"}
  ];
}

message DeclineSpaceInvitationRequest {
  // Required. Format: spaces/{space}/invitations/{username}.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/SpaceInvitation"}
  ];
}

message ListSpaceMembersRequest {
  // Required. The parent space. Format: spaces/{space}.
  string parent = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {child_type: "memos.api.v1/SpaceMember"}
  ];

  // Optional. The maximum number of members to return.
  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];

  // Optional. A token from a previous ListSpaceMembers response.
  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
}

message ListSpaceMembersResponse {
  repeated SpaceMember space_members = 1;
  string next_page_token = 2;
}

message GetSpaceMemberRequest {
  // Required. Format: spaces/{space}/members/{username}.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/SpaceMember"}
  ];
}

message UpdateSpaceMemberRequest {
  // Required. The membership with the new role.
  SpaceMember space_member = 1 [(google.api.field_behavior) = REQUIRED];

  // Required. Only role is supported.
  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = REQUIRED];
}

message DeleteSpaceMemberRequest {
  // Required. Format: spaces/{space}/members/{username}.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/SpaceMember"}
  ];
}