_network_functions

# Determine if a listener is active (useful for non-http endpoints)
function _listener_ready() {
    local endpoint=$1
    if ! shift 1; then echo "ERROR: ${FUNCNAME[0]}() Missing argument"; return 1; fi
    curl -sf --max-time 1 "gopher://${endpoint}"

    # '28 Operation timeout' means that curl WAS able to connect
    [[ $? == 28 ]]
}

# Sleep until listener becomes active
function _wait_for_listener() {
    local endpoint=$1
    if ! shift 1; then echo "ERROR: ${FUNCNAME[0]}() Missing argument"; return 1; fi

    echo -n "Waiting for ${endpoint} "
    local -i sec=0
    while ! _listener_ready ${endpoint}; do
        echo -n "."
        sleep 1
        sec+=1
    done
    echo "(${sec}s)"
}

function _endpoint_ready() {
    local url=$1
    if ! shift 1; then echo "ERROR: ${FUNCNAME[0]}() Missing argument"; return 1; fi

    curl -sf --max-time 1 "${url}" > /dev/null 2>&1
}

# Sleep until listener becomes active
# Usage: _wait_for_endpoint <uri> [<timeout>]
function _wait_for_endpoint() {
    local url=$1
    if ! shift 1; then echo "ERROR: ${FUNCNAME[0]}() Missing argument"; return 1; fi
    local -i timeout=$2

    local -i sec=0
    echo -n "Waiting for ${url} "
    while ! _endpoint_ready ${url}; do
        echo -n "."
        sleep 1
        sec+=1
    done
    echo "(${sec}s)"
}