msg_matrix

#!/bin/sh -eu
#
# Sends standard input to Matrix homeserver. Ugly, dirty, and
# slow. Rewrite with python or PHP later.
#
# Required environment variables:
#
# type      m.text, m.notice, etc.
# server    Server hostname, including protocol
# room      Room ID (not name!)
# token     Access token
#
# Optional:
#
# link      Link to a page
# linktext  Link text content

export type
export room
export link
export linktext

matrix () {
    curl -X $1 --header 'Content-Type: application/json' \
	 --header 'Accept: application/json' -d @- "$2/_matrix/client/r0/$3"
}

get_id () {
    jq -nr '(env.room | @uri)' | {
	read -r room_esc
	matrix POST "$server" "join/$room_esc?access_token=$token" |
	    jq -cr '(.room_id | @uri)'
    }
}
    
jq -sRc '{body:(. + " " + env.linktext + "" + env.notify),msgtype: env.type, formatted_body: ((.|@html)+" <a href=\""+env.link+"\">"+env.linktext+"</a>"+(env.notify | @html)), format: "org.matrix.custom.html"}' |
    matrix PUT "$server" "rooms/`get_id`/send/m.room.message/`date +%s`?access_token=$token" |
    jq -er .event_id