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+#[derive(Serialize,Deserialize,Clone,Debug)] +pub struct SignedClientMessage { + message: ClientMessage, + // Should I enforce this being a ecdsa signature? + #[serde(with = "serde_bytes")] + signature: Box<[u8]> +} + +#[derive(Serialize,Deserialize,Clone,Debug)] +pub enum ClientMessage { + + Auth{ + username: String, + password: String + }, + // Maybe ask for email too? Or a potential invite code + UserCreate { + username: String, + password: String, + }, + // Used to require accounts to complete some kind of challenge. Simplest + // is giving a password/invite code to create an account or join a room + ChallengeAnswer { + response: String + }, + // TODO I still dont have key management commands + + // Should it be one message type or mutiple? + Message { + body: String, + }, + // Private message/invite mechanism + MessagePost { + body: String, + user: User + }, + // Replace the body of the message with a new one + MessageEdit { + body: String, + id: MessageId + }, + MessageDelete { + id: MessageId + }, + // State Actions + StateCreate { + path: StatePath, + ty: StateType, + permissions: Option> + }, + StateWrite { + path: StatePath, + content: StateValue + }, + StateDelete { + path: StatePath, + }, + StateAppend { + path: StatePath, + content: StateValue + }, + StateMove { + path: StatePath, + target: StatePath, + }, + StateRead { + path: StatePath + }, + PermissionAdd { + permission: StatePermission + }, + PermissionDelete { + permission: StatePermissionKey + }, + // Groups really should have a way to add permissions by user + // specifically for who can join or invite others + // + // Maybe make a group -> role -> member hierarchy? + // + // + // Could always do this through a bot that owns a group?? + GroupCreate { + group: Group, + users: Vec + }, + // Only the creator of a group or a server admin can delete groups + GroupDelete { + group: Group + }, + // Only the creator of a group or a server admin can delete groups + // same with adding, though there should be a way to add group officers + // at some point + GroupUserAdd { + group: Group, + users: Vec + }, + GroupUserRemove { + group: Group, + users: Vec + }, + GroupRoleCreate { + group: Group, + role: Role + }, + GroupRoleDelete { + group: Group, + role: Role + }, + GroupRoleUserAdd { + group: Group, + role: Role, + users: Vec + }, + GroupRoleUserRemove { + group: Group, + role: Role, + users: Vec + }, + // Should work like discord roles + // Can control who can invite to the group + // Can be used with permissions to make rooms that are private for individual roles + GroupRolePowerAdd { + group: Group, + role: Role, + power: GroupPower + }, + GroupRolePowerRemove { + group: Group, + role: Role, + power: GroupPower + }, + // Returns an ID to use for message sending + // The server can potentially use the current username to associate media uploads + // with users + MediaUpload { + #[serde(with = "serde_bytes")] + bytes: Vec + }, + // Join and subscribe + Join { + room_id: RoomId, + }, + SubscribeMessages { + room_id: RoomId, + }, + SubscribeState { + room_id: RoomId, + state: StatePath + }, + FetchMessages { + count: u64, + end: MessageId, + } +} + +#[derive(Serialize,Deserialize)] +enum ServerError { + InvalidPermission, + // Server can specify the required challenge + ChallengeInvitecode, + +} + +#[derive(Serialize,Deserialize)] +enum ServerMessage { + // Returned on fetch or naturally from subscribe + Messages(Vec), + MediaUploaded(Uuid), + Error(ServerError), + // Returned both on read and from subscribe + State(StateValue), + Ok, +} diff --git a/src/federation.rs b/src/federation.rs new file mode 100644 index 0000000..e89804c --- /dev/null +++ b/src/federation.rs @@ -0,0 +1,60 @@ +use serde::{Deserialize, Serialize}; +use uuid::Uuid; + +use crate::state::{StatePath,StateValue,StatePermissionKey}; +use crate::message::Message; +use crate::{RoomId,User}; +use crate::client::TaggedClientMessage; +// How do remote subscriptions work? +// Server pushes subscription to remote +// remote keeps track of list, filters on message broadcast +// forwards message +// local server sends over local channel +// local server checks for message ack +// if no acks for N times then subscription is cancelled +// NOTE: should acks be sent by the client?? +// NOTE 2: Should they be sent by the server to avoid traffic multiplication attacks? +#[derive(Serialize,Deserialize)] +pub enum ServerRequest { + SubscribeMessages { + room_id: RoomId, + user: User, + + }, + UnsubscribeMessages { + room_id: RoomId + }, + SubscribeState { + room_id: RoomId, + user: User, + state: StatePath + }, + UnsubscribeState { + room_id: RoomId, + state: StatePath + }, + FetchRemoteMedia { + id: Uuid + }, + // Check to see if a user is in any of the given groups on the remote server + CheckGroups { + user: User, + groups: Vec + }, + //NOTE: It doesn't make sense to forward every kind of message + // But duplicating work here doesn't make sense + ForwardedMessage(TaggedClientMessage) +} +#[derive(Serialize,Deserialize)] +pub enum ServerResponse { + Messages(Vec), + Error(FederationError), + State(StateValue), + Media(Uuid,#[serde(with = "serde_bytes")] Vec), + ValidGroups(User,Vec) +} + +#[derive(Serialize,Deserialize)] +pub enum FederationError { + InvalidPermission, +} diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..d2caa19 --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,38 @@ +use serde::{Deserialize,Serialize}; + +pub mod client; +pub mod federation; +pub mod state; +pub mod message; + +// Room coordinates and originating server +#[derive(Serialize,Deserialize,Clone,Debug)] +pub struct RoomId{ + coordinates: Vec, + server: Option +} + +#[derive(Serialize,Deserialize,Clone,Hash,Eq,PartialEq,Debug)] +pub struct User { + name: String, + // Should be a fqdn probably, dunno if its worth enforcing that here + server: String +} + +#[derive(Serialize,Deserialize,Clone,Hash,Eq,PartialEq,Debug)] +pub struct Group { + name: String, + // Should be a fqdn probably, dunno if its worth enforcing that here + server: String +} + +// Might want to standardize this, idk which powers would be useful though +// should be things like who can manage roles, group members, and more specific +// stuff like who can post images or join different rooms +#[derive(Serialize,Deserialize,Clone,Debug)] +pub struct GroupPower(String); + +#[derive(Serialize,Deserialize,Clone,Hash,Eq,PartialEq,Debug)] +pub struct Role { + name: String +} diff --git a/src/message.rs b/src/message.rs new file mode 100644 index 0000000..5d56b39 --- /dev/null +++ b/src/message.rs @@ -0,0 +1,15 @@ +use crate::User; +use time::OffsetDateTime; +use serde::{Deserialize, Serialize}; + +//Monotonically increasing messageID +#[derive(Serialize,Deserialize,Debug,Clone)] +pub struct MessageId(u64); + +#[derive(Serialize,Deserialize,Debug,Clone)] +pub struct Message { + body: String, + signature: Box<[u8]>, + sender: User, + timestamp: OffsetDateTime +} diff --git a/src/state.rs b/src/state.rs new file mode 100644 index 0000000..29191af --- /dev/null +++ b/src/state.rs @@ -0,0 +1,37 @@ +use serde::{Deserialize,Serialize}; +use crate::{User,Group,Role}; +#[derive(Serialize,Deserialize,Clone,Debug)] +pub enum StateValue { + String(String), + Binary(Vec) +} +#[derive(Serialize,Deserialize,Debug,Clone)] +pub enum StateType { + Directory, + String, + Binary +} + + +#[derive(Serialize,Deserialize,Clone,Hash,Eq,PartialEq,Debug)] +pub enum StatePermissionKey { + User(User), + Group(Group), + Role(Group,Role), + //This is a string for now but could get compiled later into an actual regex + //should be able to match on name and server + UserRegex(String) +} +#[derive(Serialize,Deserialize,Clone,Debug)] +pub enum StatePermissionValue { + None, + Read, + ReadWrite, + // Can only set value, does not allow appending + Write +} +#[derive(Serialize,Deserialize,Clone,Debug)] +pub struct StatePermission(StatePermissionKey,StatePermissionValue); + +#[derive(Serialize,Deserialize,Clone,Debug)] +pub struct StatePath(Vec);