#!/bin/sh

# Utility functions for shell script


# Very simple 'logger' for shell script support JSON output
# To turn on JSON output, set env LOG_IN_JSON_FMT=1
# ---------------------
logging_info () {
    msg="${1}"
    logging_msg "INFO" "\${msg}"
}

logging_warning () {
    msg="${1}"
    logging_msg "WARNING" "\${msg}"
}

logging_error () {
    msg="${1}"
    logging_msg "ERROR" "\${msg}"
}

logging_msg () {
    eval level="${1}"
    eval msg="${2}"
    #TODO, handle 4 env or detect if it is k8s
    if [ ! -z "$LOG_IN_JSON_FMT" ]; then
        echo_json_log "INFO" "\${msg}"
    else
        # echo "$ENV - $msg"
        echo "$msg"
    fi  
}

echo_json_log () {
    eval level="$1"
    eval msg="${2}"

    # Handle double quote
    msg="${msg//[\"]/\\\"}"
    # Handle mutliline
    msg=$(echo "$msg" | sed -e '1h;2,$H;$!d;g' -re 's/([^\n]*)\n([^\n]*)/\1\\n\2/g' )

    #Replace %N with %3N for milliseconds, %6N for micro-seconds...
    # now=`date '+%FT%T.%3N%:z'`
    now=`date '+%FT%T%z'`
    echo "{\"time\": \"${now}\", \"level\": \"${level}\", \"message\": \"${msg}\"}"
}