rmux-server 0.1.0

Tokio daemon and request dispatcher for the RMUX terminal multiplexer.
Documentation 
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use rmux_proto::types::OptionScopeSelector;
use rmux_proto::{RmuxError, ScopeSelector};

use crate::pane_terminals::{session_not_found, HandlerState};

pub(crate) fn attached_client_required(command_name: &str) -> RmuxError {
    RmuxError::Server(format!("{command_name} requires an attached client"))
}

pub(crate) fn ambiguous_attached_client(command_name: &str) -> RmuxError {
    RmuxError::Server(format!(
        "{command_name} requires an unambiguous attached client"
    ))
}

pub(crate) fn ensure_scope_session_exists(
    state: &HandlerState,
    scope: &ScopeSelector,
) -> Result<(), RmuxError> {
    match scope {
        ScopeSelector::Global => Ok(()),
        ScopeSelector::Session(session_name) => {
            if state.sessions.contains_session(session_name) {
                Ok(())
            } else {
                Err(session_not_found(session_name))
            }
        }
        ScopeSelector::Window(target) => {
            let session = state
                .sessions
                .session(target.session_name())
                .ok_or_else(|| session_not_found(target.session_name()))?;
            if session.window_at(target.window_index()).is_some() {
                Ok(())
            } else {
                Err(RmuxError::invalid_target(
                    target.to_string(),
                    "window index does not exist in session",
                ))
            }
        }
        ScopeSelector::Pane(target) => {
            let session = state
                .sessions
                .session(target.session_name())
                .ok_or_else(|| session_not_found(target.session_name()))?;
            let window = session.window_at(target.window_index()).ok_or_else(|| {
                RmuxError::invalid_target(
                    format!("{}:{}", target.session_name(), target.window_index()),
                    "window index does not exist in session",
                )
            })?;
            if window.pane(target.pane_index()).is_some() {
                Ok(())
            } else {
                Err(RmuxError::invalid_target(
                    target.to_string(),
                    "pane index does not exist in session",
                ))
            }
        }
    }
}

pub(crate) fn ensure_option_scope_exists(
    state: &HandlerState,
    scope: &OptionScopeSelector,
) -> Result<(), RmuxError> {
    match scope {
        OptionScopeSelector::ServerGlobal
        | OptionScopeSelector::SessionGlobal
        | OptionScopeSelector::WindowGlobal => Ok(()),
        OptionScopeSelector::Session(session_name) => {
            if state.sessions.contains_session(session_name) {
                Ok(())
            } else {
                Err(session_not_found(session_name))
            }
        }
        OptionScopeSelector::Window(target) => {
            ensure_scope_session_exists(state, &ScopeSelector::Window(target.clone()))
        }
        OptionScopeSelector::Pane(target) => {
            ensure_scope_session_exists(state, &ScopeSelector::Pane(target.clone()))
        }
    }
}