#!/bin/bash
#####################################################################################
#
# Title:        dockerBuild.sh
# Author:       wildkindcc
# Date:         06/09/2019
# Description:  Easy execute script for ongoing development with docker.
#
#               Execution will kill any containers running for a defined image name,
#               re-build from a local Dockerfile and re-execute via "dockerRun" variable.
#
#####################################################################################
# Configuration Options
#
#====================================================================================
# Name is the image to build and create containers for. This can be anything, just make sure
#   it's unique, otherwise it will kill and remove other containers!
name="pythonwebserver"

# dockerRun is the final command to call which will re-load the container from the
#   freshly build image.  Change this however it suits your application.
dockerRun () {
    docker run -d -e PYTHONUNBUFFERED=0 -p 8000:8080 --rm $name
}

#====================================================================================
#
#####################################################################################
# Coloured Output
BLUE='\033[0;34m' 	# Blue
GREEN='\033[0;32m'	# Green
RED='\033[0;31m'	# Red
NC='\033[0m' 		# No Color

SUCCESS="${GREEN}[+] ${NC}"
ERROR="${RED}[!] ${NC}"
FAIL="${RED}[-] ${NC}"
EVENT="${BLUE}[*] ${NC}"
NOTIFICATION="[-] "

err() {
    echo -e "${ERROR}An error occured, check output.  Exiting..."
    exit 1
}

# Check if any containers for the defined image exist
var=$(docker ps -a | grep $name | awk '{ print $1 }')
if [[ -z $var ]]; then
    echo -e "${SUCCESS}No containers identified for image [$name]"
else
    echo -e "${EVENT}The following containers are present for [$name]:"
    for i in $var; do
        echo -e "${EVENT}$i"
    done
    echo ""
fi
var=$(docker ps -a | grep $name | awk '{ print $1 }')
# If containers exist, stop them
if [[ ! -z $var ]]; then
    for i in $var; do
        docker stop $i > /dev/null \
            && echo -e "${SUCCESS}[${i}] stopped." || err
    done
fi
var=$(docker ps -a | grep $name | awk '{ print $1 }')
# If containers exist, remove them (if they dont automatically)
if [[ ! -z $var ]]; then
    for i in $var; do
        docker rm $i > /dev/null \
            && echo -e "${SUCCESS}[${i}] removed." || err
    done
fi

# Check if any images exit:
var=$(docker images | grep $name | awk '{ print $3 }')
if [[ -z $var ]]; then
    echo -e "${SUCCESS}No docker images identified for specified name [$name]"
else
    echo -e "${EVENT}The following images are present for [$name]:"
    for i in $var; do
        echo -e "${EVENT}$i"
    done
    echo ""
fi
# If images exist, remove them
if [[ ! -z $var ]]; then
    for i in $var; do
        docker rmi $i > /dev/null \
            && echo -e "${SUCCESS}[${i}] stopped." || err
    done
fi

echo -e "${SUCCESS}Housekeeping complete :o)"
echo ""
echo -e "${EVENT}Commencing build for [${name}]"
docker build -t $name . \
    && echo -e "${SUCCESS}[${name}] built!." || err
echo ""
echo -e "${EVENT}See below for output of container [$name]"
echo -e "${EVENT}---------------------------------------------------------------"

dockerRun