151 lines
3.4 KiB
JavaScript
151 lines
3.4 KiB
JavaScript
var XMLHttpRequest = require('xmlhttprequest').XMLHttpRequest;
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var slackbot;
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var imgur;
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var cache = {};
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var cache_timeout = 3600; // 1h
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var output_dir = 'files';
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module.exports = {
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init: init,
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handle_msg: handle_msg
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};
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function init(_slackbot, imgur_client_id)
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{
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slackbot = _slackbot;
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imgur = require('imgur');
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imgur.setClientId(imgur_client_id);
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}
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function jsonrpc_call(method, params, callback) {
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var xhr = new XMLHttpRequest;
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xhr.addEventListener('load', function() {
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var response = JSON.parse(xhr.responseText);
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callback(response);
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});
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xhr.addEventListener('error', function (e) {
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callback({error: e})
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});
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xhr.open('POST', 'http://localhost:5279/lbryapi', true);
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xhr.send(JSON.stringify({
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'jsonrpc': '2.0',
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'method': method,
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'params': [params],
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'id': 0
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}));
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}
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function handle_msg(msg, channel)
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{
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var words = msg.trim().split(' ');
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words.forEach(function(word)
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{
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if (word.lastIndexOf('<lbry://', 0) === 0)
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{
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word = word.slice(8, -1); // strip <lbry:// and >
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handle_url(word, channel);
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}
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});
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}
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function check_url(url, callback)
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{
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jsonrpc_call('resolve_name', {'name': url}, function(response)
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{
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if (response.error)
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{
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callback(response.error);
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return;
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}
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var resolved = response.result;
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if (!resolved)
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{
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callback(false);
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return;
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}
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if (resolved.fee)
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{
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callback(false);
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return;
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}
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var meta_version = resolved.ver ? resolved.ver : '0.0.1';
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var field_name = (meta_version == '0.0.1' || meta_version == '0.0.2') ?
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'content-type' : 'content_type';
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var content_type = resolved[field_name];
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callback(content_type == 'image/gif');
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});
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}
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function handle_url(url, channel)
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{
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console.log('Detected URL', url, 'on channel', channel);
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if (!cache[channel])
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{
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cache[channel] = {};
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}
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var now = new Date().getTime() / 1000;
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if (cache[channel][url])
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{
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var elapsed = now - cache[channel][url];
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if (elapsed < cache_timeout)
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{
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console.log(url, 'is cached for this channel, ignoring...')
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return;
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}
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}
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cache[channel][url] = now;
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check_url(url, function(valid)
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{
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if (valid)
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{
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console.log('Fetching', url);
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fetch_url(url, channel);
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}
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else
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{
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console.log('Ignoring', url);
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}
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});
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}
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function fetch_url(url, channel)
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{
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jsonrpc_call('get', {'name': url, 'download_directory': output_dir},
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function(response)
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{
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var result = response.result;
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if (!result)
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{
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console.warn('Failed to fetch', url);
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console.warn(response);
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slackbot.postMessage(channel, 'Unable to fetch URL [' + url + ']. Insufficient funds?');
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return;
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}
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var filename = result.path;
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console.log('Uploading', filename);
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imgur.uploadFile(filename).then(function(uploaded)
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{
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var link = uploaded.data.link;
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console.log(link);
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var attachments = [{image_url: link, title: url}];
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slackbot.postMessage(channel, null, {attachments: attachments})
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}).catch(function(err)
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{
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console.error(err.message);
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});
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});
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}
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