util

#!/usr/bin/env bash

function _require() {
    [[ -z "$2" ]] && echo "no service $1 provided" && exit 1
}

function _to_config_entry() {
    uppercase=$(echo "$service" | tr '[:lower:]' '[:upper:]')
    ref="${uppercase}_REF"
    if [ 'ontology' != "$service" ]; then
	echo "INGEST_$ref"
    else
	echo "$ref"
    fi
    
}

function _replace_config() {
    config_entry=$1
    update=$2
    env=$3
    sed -i '' "s/${config_entry}.*/${update}/g" config/environment_${env}
}

function _source_env() {
    target=$(echo "$1" | tr '[:upper:]' '[:lower:]')
    if [ "staging" == "$target" ]; then
	echo 'dev'
    elif [ "prod" == "$target" ]; then
	echo 'staging'
    fi
}

function release() {
    service=$1
    version=$2
    _require "service" $service
    _require "version" $version
    config_entry=$(_to_config_entry $service)
    _replace_config "$config_entry" "${config_entry}=${version}" dev
}

function promote() {    
    to_env=$1
    service=$2    
    _require "deployment environment" $to_env
    _require "service" $service
    from_env=$(_source_env "$to_env")
    [[ -z "$from_env" ]] && echo "cannot determine source for '$to_env'" && exit 1
    config_entry=$(_to_config_entry "$service")
    update=$(grep -ioE "${config_entry}.*" config/environment_${from_env})
    _replace_config $config_entry $update $to_env
}

"$@"