#!/usr/bin/env sh

# Configurable Variables
DOCKER_SOCK_PATH="${DOCKER_SOCK_PATH:-/tmp/docker.sock}"
NETWORK_NAME="${NETWORK_NAME:-proxy}"
TEMPLATER_PATH="${TEMPLATER_PATH:-/docker-templater.sh}"
TEMPLATE_FOLDER_PATH="${TEMPLATE_FOLDER_PATH:-/templates}"

query_docker () {
    curl --unix-socket $DOCKER_SOCK_PATH --silent -g http://v1.41/$1$2
}

update_templates() {
    CONTAINER_LIST=$(query_docker "containers/json" "?filters={%22network%22:[%22${NETWORK_NAME}%22],%22status%22:[%22running%22]}")
    if [ "${CONTAINER_LIST}" != "${OLD_CONTAINER_LIST}" ]
    then
        for template in "${TEMPLATE_FOLDER_PATH}"/*
        do
            if ! "${TEMPLATER_PATH}" "${template}" "${CONTAINER_LIST}"
            then
                echo "Error Processing Template: ${template}"
            fi
        done
        OLD_CONTAINER_LIST="${CONTAINER_LIST}"
    fi
}

# Initial Generation
update_templates

# cannot filter because reailine no longer recognized lines otherwise (check how IFS changes)
query_docker "events" | while  true
do
    read -r;
    # wait for related events to finish
    while [ $? -eq 0 ]
    do
        read -t 8 -r
    done
    update_templates
done