bash_skype

#!/bin/bash

# Most of the below utilites depends on the "jq" tool for parsing the 
# See https://stedolan.github.io/jq/ for installing jq tool.
# JSON reponse from JIRA rest API. Below environment variables need to
# be configured for the tool to function.
# SKYPE_BOT_ID - Skype bot id from Azure
# SKYPE_BOT_PASSWORD - Skype bot password from Azure
# SKYPE_BOT_AUTH_URL - Skype bot login url 
# SKYPE_BOT_API_URL - Skype bot service url
# SKYPE_AUTH_TOKEN_DB - File to cache auth token for Skype bot

# configure bot credentials here.
export SKYPE_BOT_ID=
export SKYPE_BOT_PASSWORD=

export SKYPE_BOT_AUTH_URL="https://login.microsoftonline.com/botframework.com/oauth2/v2.0/token"
export SKYPE_BOT_API_URL="https://smba.trafficmanager.net/apis"
export SKYPE_AUTH_TOKEN_DB="/tmp/.skype_get_auth_token.db"


skype_send_chat() {
	local conversation_id message token OPTIND choice
	while getopts 'c:m:h' choice
	do
		case $choice in
			c) conversation_id=$OPTARG ;;
			m) message=$OPTARG ;;
			h) echo "Usage: skype_send_chat -c conversation_id -m message [-h]"; return 
		esac
	done

	if [[ -z "$conversation_id" || -z "$message" ]]; then
		skype_send_chat -h
		return
	fi

	if ! [ -e $SKYPE_AUTH_TOKEN_DB ]; then
		_skype_get_auth_token > $SKYPE_AUTH_TOKEN_DB
	fi

	token=`cat $SKYPE_AUTH_TOKEN_DB`
	response=`_skype_send_message "$conversation_id" "$message" "$token"`
	response_code=`echo "$response" | awk 'NR==1{print $2}'`

	if [ $response_code == "401" ]; then #Unautohrized
		_skype_get_auth_token > $SKYPE_AUTH_TOKEN_DB
		token=`cat $SKYPE_AUTH_TOKEN_DB`
		response=`_skype_send_message "$conversation_id" "$message" "$token"`
		response_code=`echo "$response" | awk 'NR==1{print $2}'`
	fi 

	if [ $response_code == "201" ]; then
		echo "Skype message has been sent successfully."
	else
		echo "Something went wrong, the message is not sent. reponse = $response"
	fi
}

_skype_get_auth_token() {
	curl -s -X POST $SKYPE_BOT_AUTH_URL -H 'Content-Type: application/x-www-form-urlencoded' \
	--data-urlencode 'grant_type=client_credentials' \
	--data-urlencode "client_id=$SKYPE_BOT_ID" \
	--data-urlencode "client_secret=$SKYPE_BOT_PASSWORD" \
	--data-urlencode 'scope=https://api.botframework.com/.default' | jq -r '.access_token'
}

_skype_send_message() {
	local message conversation_id toekn url payload token

	conversation_id="$1"
	message="$2"
	token="$3"
	url="$SKYPE_BOT_API_URL/v3/conversations/$conversation_id/activities"
	payload=$(jq -n \
		--arg t "message" \
		--arg m "$message" \
		'{type: $t, text: $m}')
	
	curl -s -i -X POST -H "Authorization: Bearer $token" -H "Content-Type: application/json" "$url" -d "$payload"
}