#!/bin/bash

set -e

# Synchrony startup wrapper for systemd. Note: This expects the
# environment to be setup, usually by sourceing /etc/atl and
# /etc/atl.synchrony with EnvironmentFile. See the rest of this role
# for details. The rest of the variables below need to be calculated
# at runtime.

# Find the first Postgres driver in lib folder
SYNCHRONY_JWT_PRIVATE_KEY="UNSET"
SYNCHRONY_JWT_PUBLIC_KEY="UNSET"

ATL_POSTGRES_DRIVER_PATH=$(ls -t ${ATL_CONFLUENCE_INSTALL_DIR}/confluence/WEB-INF/lib/postgresql*.jar | head -n 1)
SYNCHRONY_CLASSPATH="${ATL_SYNCHRONY_JAR_PATH}:${ATL_POSTGRES_DRIVER_PATH}"


# To support retries these commands won't fail the script by virtue of using `--shell` option for xmllint.
function extractJWTKeyFromConfluenceConfig {
    local keyType=$1
    if [[ "${keyType}" != "jwt.private.key" && "${keyType}" != "jwt.public.key" ]]; then
        atl_log "Unexpected value for keyType - ${keyType} to extract JWT key from confluence.cfg.xml"
        exit 1
    fi
    echo "cat //properties/property[@name='${keyType}']/text()" | xmllint --nocdata --shell ${ATL_CONFLUENCE_SHARED_CONFIG_FILE} | sed '1d;$d'
}

# Synchrony requires JWT keys to communicate with Confluence application. These keys are written to the config file
# after admin will go through the setup and provide license. This function waits for the keys being available in the
# config file.
function waitForConfluenceConfigInSharedHome() {
    atl_log "=== BEGIN: Waiting for confluence.cfg.xml available in shared home folder ==="
    while [[ ! -f ${ATL_CONFLUENCE_SHARED_CONFIG_FILE} ]]; do
	sleep ${ATL_SYNCHRONY_WAITING_CONFIG_TIME}
	atl_log "====== :   Keep waiting for ${ATL_SYNCHRONY_WAITING_CONFIG_TIME} seconds ======"
    done

    atl_log "====== : Fetching JWT keys from Confluence config... ======"
    while [[ -z ${SYNCHRONY_JWT_PRIVATE_KEY} || -z ${SYNCHRONY_JWT_PUBLIC_KEY} ]]; do
    	SYNCHRONY_JWT_PRIVATE_KEY=$(extractJWTKeyFromConfluenceConfig 'jwt.private.key') >> ${ATL_LOG} 2>&1
        SYNCHRONY_JWT_PUBLIC_KEY=$(extractJWTKeyFromConfluenceConfig 'jwt.public.key') >> ${ATL_LOG} 2>&1
        if [[ -z ${SYNCHRONY_JWT_PRIVATE_KEY} || -z ${SYNCHRONY_JWT_PUBLIC_KEY} ]]; then
	    atl_log "====== :   Could not load value for JWT key; will wait for next ${ATL_SYNCHRONY_WAITING_CONFIG_TIME} seconds before reload ======"
	    sleep ${ATL_SYNCHRONY_WAITING_CONFIG_TIME}
        fi
    done

    atl_log "=== END: Waiting for confluence.cfg.xml available in shared home folder ==="
}


######################################################################
# Start Synchrony service

waitForConfluenceConfigInSharedHome

exec ${_RUNJAVA} \
     ${SYNCHRONY_CLASSPATH} \
     ${ATL_SYNCHRONY_JVM_PROPERTIES} \
     -Djwt.private.key=${SYNCHRONY_JWT_PRIVATE_KEY} \
     -Djwt.public.key=${SYNCHRONY_JWT_PUBLIC_KEY} \
     synchrony.core sql