tmux.lua

local T = {}

local TMUX = os.getenv('TMUX')
local TMUX_PANE = os.getenv('TMUX_PANE')

local tmux_directions = {
    p = 'l',
    h = 'L',
    k = 'U',
    l = 'R',
    j = 'D',
}

-- Do we really using tmux
T.is_tmux = TMUX ~= nil

-- For getting tmux socket
function T.get_socket()
    -- The socket path is the first value in the comma-separated list of $TMUX.
    return vim.split(TMUX, ',')[1]
end

-- For executing a tmux command
function T.execute(arg)
    local t_cmd = string.format('tmux -S %s %s', T.get_socket(), arg)

    local handle = assert(io.popen(t_cmd), string.format('Navigator: Unable to execute > [%s]', t_cmd))
    local result = handle:read()

    handle:close()

    return result
end

-- For execting `tmux select-pane` command
function T.change_pane(direction)
    local arg = string.format("select-pane -t '%s' -%s", TMUX_PANE, tmux_directions[direction])

    T.execute(arg)
end

function T.is_zoomed()
    -- if result is 1 then tmux pane is zoomed
    return T.execute("display-message -p '#{window_zoomed_flag}'") == '1'
end

return T