#!/usr/bin/php
# Usage example: matrix_cp /tmp/test.jpg glasgow
# this will send the test.jpg to the glasgow room
# this also supports remote URLs
<?php
$usage = "Usage: ".$argv[0]." filename room_name alt_text[optional]\n";
$filename = "";
$room_name = "#pythia";
$alt_text = "Image attachment";
$homeserver = "glasgow.social";
$access_token = "access_token_goes_here"
// I have a lookup list of friendly room names to full IDs here
$channels["glasgow"] = "!BOrDFgeDdZZbUvfjjs:glasgow.social";

if(!empty($argv[2]))
   $room_name = $argv[2];
if(!empty($argv[3]))
   $alt_text = $argv[3];

$room = $channels[$room_name];
if(empty($room))
   die($room_name." not in room list");

if(empty($argv[1]))
   die("Filename is required. $usage");

$filename = $argv[1];
$image_data = file_get_contents($filename);

// this whole temporary file saving is all done to support mime_type lookups for remote URLs
$tmp_filename = "/tmp/".md5($argv[0].time());

if(empty($image_data))
   die("Unable to read file location");
file_put_contents($tmp_filename, $image_data);
$mime_type = mime_content_type($tmp_filename);

$url = "https://$homeserver/_matrix/media/r0/upload?access_token=$access_token";
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: $mime_type"));
curl_setopt($ch, CURLOPT_POSTFIELDS, $image_data);
$response = curl_exec($ch);

if(!empty($response_json['content_uri'])) {
      $url = "https://$homeserver/_matrix/client/r0/rooms/$room/send/m.room.message?access_token=$access_token";
      $msgtype = "m.image";
      $mxc_url = $response_json['content_uri'];
      $ch = curl_init($url);
      $payload = json_encode(array("msgtype"=>$msgtype, "body"=>$alt_text, "url"=>$mxc_url));
      curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
      $response = curl_exec($ch);
      // SUCCESS.  No output.
   } else {
      echo "Error uploading $filename. ";
      echo implode(" : ", $response_json)."\n";
   }