#!/bin/bash

channel_name=${1}
if [ "" == "${channel_name}" ]
then
    echo "Usage: ${0} <channel_name>"
	exit 1
fi

url=$(jq -r '.MATTERMOST.url' ${HOME}/.creds)
team=$(jq -r '.MATTERMOST.team' ${HOME}/.creds)
bearer=$(jq -r '.MATTERMOST.bearer' ${HOME}/.creds)


get_channel_url="${url}/api/v4/teams/name/${team}/channels/name/${channel_name}"

Cmd="curl -s"
Cmd="${Cmd} -X GET"
Cmd="${Cmd} -H \"Content-Type: Application/JSON\""
Cmd="${Cmd} -H \"Authorization: Bearer ${bearer}\""
Cmd="${Cmd} ${get_channel_url}"
Cmd="${Cmd} | jq -r '.id'"

channel_id=$(eval ${Cmd})

input="$(cat)"

body="{"
body="${body}\"channel_id\":\"${channel_id}\""
body="${body}, \"message\":\"${input}\""
body="${body}}"

# replace new line with literal \n
body=$(echo "${body}" |awk '{printf "%s\\n", $0}')

post_url="${url}/api/v4/posts"

Cmd="curl -s"
Cmd="${Cmd} --request POST"
Cmd="${Cmd} --header \"Content-Type: Application/JSON\""
Cmd="${Cmd} --header \"Authorization: Bearer ${bearer}\""
Cmd="${Cmd} --data @-"
Cmd="${Cmd} ${post_url}"

(echo "${body}" | eval ${Cmd}) > /dev/null