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const spawn = require('child_process').spawn;
const fs = require('fs');
const { ConsoleTransportOptions } = require('winston/lib/winston/transports');
/*
\\"".fp - R cmunrm
\\"".fp - I cmunti
\\"".fp - B cmunrb
\\"".fp - BI cmunbi
*/
const prelude = `
.fp - CMEX CMEX10
.fp - CMSY CMSY10
.fp - CMMI CMMI10
.fp - CB CB
.fspecial R CMEX CMSY
.fspecial I CMMI
.EQ
define <=> %{vcenter roman " \\\\N'arrowdblboth' "}%
define appr %{vcenter roman "≈"}%
define intd %{vcenter roman "\\\\N'integraldisplay'"}%
delim $$
.EN
.LP
.ps +20
\\m[white]
`;
module.exports.loadModule = function loadModule(bot) {
bot.handler.endpoint(/^tr(?:off)?!?(?: |\n)([\s\S]*)$/m, [], (match, message) => {
ma = match[1].replace(/^\.sy\s.*$/gm, '');
ma = ma.replace(/^sh\s.*$/gm, '');
ma = ma.replace(/^\.?co\s.*$/gm, '');
ma = ma.replace(/^\\X.*$/gm, '');
if (ma !== match[1]) console.log('had to sanitize');
const subprocess0 = spawn('pic');
console.log(ma);
subprocess0.stdin.write(prelude + '\n' + ma + '\n');
subprocess0.stdin.end();
const subprocess1 = spawn('eqn');
subprocess0.stdout.pipe(subprocess1.stdin);
const subprocess2 = spawn('roff', ['-ms']);
subprocess1.stdout.pipe(subprocess2.stdin);
const subprocess3 = spawn('pdf', ['-p', '10000x10000']);
subprocess2.stdout.pipe(subprocess3.stdin);
const subprocess4 = spawn('convert', ['-', '-trim', 'png:-']);
subprocess3.stdout.pipe(subprocess4.stdin);
let ch = Buffer.from("");
subprocess4.stdout.on('data', (data) => {
ch = Buffer.concat([ch, data]);
});
subprocess4.stdout.on('end', () => {
message.channel.createMessage('', {name: 'troff.png', file: ch});
});
});
};
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