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Prepare exported ANSI messages by ensuring they are < 79 characters in length, using ESC[A ESC[<N>C to adjust long lines

This commit is contained in:
Bryan Ashby 2017-08-26 20:37:20 -06:00
parent 968a22c5eb
commit d132f3932a
3 changed files with 221 additions and 108 deletions
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216
core/ftn_mail_packet.js
View File

@ -636,108 +636,144 @@ function Packet(options) {
});
};
this.getMessageEntryBuffer = function(message, options) {
let basicHeader = new Buffer(34);
this.getMessageEntryBuffer = function(message, options, cb) {
basicHeader.writeUInt16LE(FTN_PACKET_MESSAGE_TYPE, 0);
basicHeader.writeUInt16LE(message.meta.FtnProperty.ftn_orig_node, 2);
basicHeader.writeUInt16LE(message.meta.FtnProperty.ftn_dest_node, 4);
basicHeader.writeUInt16LE(message.meta.FtnProperty.ftn_orig_network, 6);
basicHeader.writeUInt16LE(message.meta.FtnProperty.ftn_dest_network, 8);
basicHeader.writeUInt16LE(message.meta.FtnProperty.ftn_attr_flags, 10);
basicHeader.writeUInt16LE(message.meta.FtnProperty.ftn_cost, 12);
const dateTimeBuffer = new Buffer(ftn.getDateTimeString(message.modTimestamp) + '\0');
dateTimeBuffer.copy(basicHeader, 14);
// toUserName & fromUserName: up to 36 bytes in length, NULL term'd
// :TODO: DRY...
let toUserNameBuf = iconv.encode(message.toUserName + '\0', 'CP437').slice(0, 36);
toUserNameBuf[toUserNameBuf.length - 1] = '\0'; // ensure it's null term'd
let fromUserNameBuf = iconv.encode(message.fromUserName + '\0', 'CP437').slice(0, 36);
fromUserNameBuf[fromUserNameBuf.length - 1] = '\0'; // ensure it's null term'd
// subject: up to 72 bytes in length, NULL term'd
let subjectBuf = iconv.encode(message.subject + '\0', 'CP437').slice(0, 72);
subjectBuf[subjectBuf.length - 1] = '\0'; // ensure it's null term'd
//
// message: unbound length, NULL term'd
//
// We need to build in various special lines - kludges, area,
// seen-by, etc.
//
// :TODO: Put this in it's own method
let msgBody = '';
function appendMeta(k, m) {
function getAppendMeta(k, m) {
let append = '';
if(m) {
let a = m;
if(!_.isArray(a)) {
a = [ a ];
}
a.forEach(v => {
msgBody += `${k}: ${v}\r`;
append += `${k}: ${v}\r`;
});
}
return append;
}
async.waterfall(
[
function prepareHeaderAndKludges(callback) {
const basicHeader = new Buffer(34);
//
// FTN-0004.001 @ http://ftsc.org/docs/fts-0004.001
// AREA:CONFERENCE
// Should be first line in a message
//
if(message.meta.FtnProperty.ftn_area) {
msgBody += `AREA:${message.meta.FtnProperty.ftn_area}\r`; // note: no ^A (0x01)
}
Object.keys(message.meta.FtnKludge).forEach(k => {
// we want PATH to be last
if('PATH' !== k) {
appendMeta(`\x01${k}`, message.meta.FtnKludge[k]);
basicHeader.writeUInt16LE(FTN_PACKET_MESSAGE_TYPE, 0);
basicHeader.writeUInt16LE(message.meta.FtnProperty.ftn_orig_node, 2);
basicHeader.writeUInt16LE(message.meta.FtnProperty.ftn_dest_node, 4);
basicHeader.writeUInt16LE(message.meta.FtnProperty.ftn_orig_network, 6);
basicHeader.writeUInt16LE(message.meta.FtnProperty.ftn_dest_network, 8);
basicHeader.writeUInt16LE(message.meta.FtnProperty.ftn_attr_flags, 10);
basicHeader.writeUInt16LE(message.meta.FtnProperty.ftn_cost, 12);
const dateTimeBuffer = new Buffer(ftn.getDateTimeString(message.modTimestamp) + '\0');
dateTimeBuffer.copy(basicHeader, 14);
// toUserName & fromUserName: up to 36 bytes in length, NULL term'd
// :TODO: DRY...
let toUserNameBuf = iconv.encode(message.toUserName + '\0', 'CP437').slice(0, 36);
toUserNameBuf[toUserNameBuf.length - 1] = '\0'; // ensure it's null term'd
let fromUserNameBuf = iconv.encode(message.fromUserName + '\0', 'CP437').slice(0, 36);
fromUserNameBuf[fromUserNameBuf.length - 1] = '\0'; // ensure it's null term'd
// subject: up to 72 bytes in length, NULL term'd
let subjectBuf = iconv.encode(message.subject + '\0', 'CP437').slice(0, 72);
subjectBuf[subjectBuf.length - 1] = '\0'; // ensure it's null term'd
//
// message: unbound length, NULL term'd
//
// We need to build in various special lines - kludges, area,
// seen-by, etc.
//
// :TODO: Put this in it's own method
let msgBody = '';
//
// FTN-0004.001 @ http://ftsc.org/docs/fts-0004.001
// AREA:CONFERENCE
// Should be first line in a message
//
if(message.meta.FtnProperty.ftn_area) {
msgBody += `AREA:${message.meta.FtnProperty.ftn_area}\r`; // note: no ^A (0x01)
}
Object.keys(message.meta.FtnKludge).forEach(k => {
// we want PATH to be last
if('PATH' !== k) {
msgBody += getAppendMeta(`\x01${k}`, message.meta.FtnKludge[k]);
}
});
return callback(null, basicHeader, toUserNameBuf, fromUserNameBuf, subjectBuf, msgBody);
},
function prepareAnsiMessageBody(basicHeader, toUserNameBuf, fromUserNameBuf, subjectBuf, msgBody, callback) {
if(!strUtil.isAnsi(message.message)) {
return callback(null, basicHeader, toUserNameBuf, fromUserNameBuf, subjectBuf, msgBody, message.message);
}
strUtil.prepAnsi(
message.message,
{
cols : 80,
rows : 'auto',
preserveTextLines : true,
forceLineTerm : true,
exportMode : true,
},
(err, preppedMsg) => {
return callback(null, basicHeader, toUserNameBuf, fromUserNameBuf, subjectBuf, msgBody, preppedMsg || message.message);
}
);
},
function addMessageBody(basicHeader, toUserNameBuf, fromUserNameBuf, subjectBuf, msgBody, preppedMsg, callback) {
msgBody += preppedMsg + '\r';
//
// FTN-0004.001 @ http://ftsc.org/docs/fts-0004.001
// Tear line should be near the bottom of a message
//
if(message.meta.FtnProperty.ftn_tear_line) {
msgBody += `${message.meta.FtnProperty.ftn_tear_line}\r`;
}
//
// Origin line should be near the bottom of a message
//
if(message.meta.FtnProperty.ftn_origin) {
msgBody += `${message.meta.FtnProperty.ftn_origin}\r`;
}
//
// FTN-0004.001 @ http://ftsc.org/docs/fts-0004.001
// SEEN-BY and PATH should be the last lines of a message
//
msgBody += getAppendMeta('SEEN-BY', message.meta.FtnProperty.ftn_seen_by); // note: no ^A (0x01)
msgBody += getAppendMeta('\x01PATH', message.meta.FtnKludge['PATH']);
let msgBodyEncoded;
try {
msgBodyEncoded = iconv.encode(msgBody + '\0', options.encoding);
} catch(e) {
msgBodyEncoded = iconv.encode(msgBody + '\0', 'ascii');
}
return callback(
null,
Buffer.concat( [
basicHeader,
toUserNameBuf,
fromUserNameBuf,
subjectBuf,
msgBodyEncoded
])
);
}
],
(err, msgEntryBuffer) => {
return cb(err, msgEntryBuffer);
}
});
msgBody += message.message + '\r';
//
// FTN-0004.001 @ http://ftsc.org/docs/fts-0004.001
// Tear line should be near the bottom of a message
//
if(message.meta.FtnProperty.ftn_tear_line) {
msgBody += `${message.meta.FtnProperty.ftn_tear_line}\r`;
}
//
// Origin line should be near the bottom of a message
//
if(message.meta.FtnProperty.ftn_origin) {
msgBody += `${message.meta.FtnProperty.ftn_origin}\r`;
}
//
// FTN-0004.001 @ http://ftsc.org/docs/fts-0004.001
// SEEN-BY and PATH should be the last lines of a message
//
appendMeta('SEEN-BY', message.meta.FtnProperty.ftn_seen_by); // note: no ^A (0x01)
appendMeta('\x01PATH', message.meta.FtnKludge['PATH']);
let msgBodyEncoded;
try {
msgBodyEncoded = iconv.encode(msgBody + '\0', options.encoding);
} catch(e) {
msgBodyEncoded = iconv.encode(msgBody + '\0', 'ascii');
}
return Buffer.concat( [
basicHeader,
toUserNameBuf,
fromUserNameBuf,
subjectBuf,
msgBodyEncoded
]);
);
};
this.writeMessage = function(message, ws, options) {

24
core/scanner_tossers/ftn_bso.js
View File

@ -608,16 +608,22 @@ function FTNMessageScanTossModule() {
callback(null);
},
function appendMessage(callback) {
const msgBuf = packet.getMessageEntryBuffer(message, exportOpts);
currPacketSize += msgBuf.length;
packet.getMessageEntryBuffer(message, exportOpts, (err, msgBuf) => {
if(err) {
return callback(err);
}
currPacketSize += msgBuf.length;
if(currPacketSize >= self.moduleConfig.packetTargetByteSize) {
remainMessageBuf = msgBuf; // save for next packet
remainMessageId = message.messageId;
} else {
ws.write(msgBuf);
}
callback(null);
if(currPacketSize >= self.moduleConfig.packetTargetByteSize) {
remainMessageBuf = msgBuf; // save for next packet
remainMessageId = message.messageId;
} else {
ws.write(msgBuf);
}
return callback(null);
});
},
function storeStateFlags0Meta(callback) {
message.persistMetaValue('System', 'state_flags0', Message.StateFlags0.Exported.toString(), err => {

89
core/string_util.js
View File

@ -217,8 +217,9 @@ function stringFromNullTermBuffer(buf, encoding) {
}
const PIPE_REGEXP = /(\|[A-Z\d]{2})/g;
const ANSI_REGEXP = /[\u001b\u009b][[()#;?]*([0-9]{1,4}(?:;[0-9]{0,4})*)?([0-9A-ORZcf-npqrsuy=><])/g;
const ANSI_OR_PIPE_REGEXP = new RegExp(PIPE_REGEXP.source + '|' + ANSI_REGEXP.source, 'g');
//const ANSI_REGEXP = /[\u001b\u009b][[()#;?]*([0-9]{1,4}(?:;[0-9]{0,4})*)?([0-9A-ORZcf-npqrsuy=><])/g;
//const ANSI_OR_PIPE_REGEXP = new RegExp(PIPE_REGEXP.source + '|' + ANSI_REGEXP.source, 'g');
const ANSI_OR_PIPE_REGEXP = new RegExp(PIPE_REGEXP.source + '|' + ANSI.getFullMatchRegExp().source, 'g');
//
// Similar to substr() but works with ANSI/Pipe code strings
@ -393,6 +394,7 @@ function prepAnsi(input, options, cb) {
options.rows = options.rows || options.termHeight || 'auto';
options.startCol = options.startCol || 1;
options.preserveTextLines = options.preserveTextLines || false;
options.exportMode = options.exportMode || false;
const canvas = Array.from( { length : 'auto' === options.rows ? 25 : options.rows }, () => Array.from( { length : options.cols}, () => new Object() ) );
const parser = new ANSIEscapeParser( { termHeight : options.termHeight, termWidth : options.termWidth } );
@ -516,12 +518,81 @@ function prepAnsi(input, options, cb) {
output += `${ANSI.blackBG()}${row.slice(i).map( () => ' ').join('')}${lastSgr}`;
}
if(options.startCol + options.cols < options.termWidth || options.forceLineTerm) {
//if(options.startCol + options.cols < options.termWidth || options.forceLineTerm) {
if(options.startCol + i < options.termWidth || options.forceLineTerm) {
output += '\r\n';
}
}
});
if(options.exportMode) {
//
// If we're in export mode, we do some additional hackery:
//
// * Hard wrap ALL lines at <= 79 *characters* (not visible columns)
// if a line must wrap early, we'll place a ESC[A ESC[<N>C where <N>
// represents chars to get back to the position we were previously at
//
// * Replace contig spaces with ESC[<N>C as well to save... space.
//
// :TODO: this would be better to do as part of the processing above, but this will do for now
const MAX_CHARS = 79 - 8; // 79 max, - 8 for max ESC seq's we may prefix a line with
let exportOutput = '';
let m;
let afterSeq;
let wantMore;
let renderStart;
splitTextAtTerms(output).forEach(fullLine => {
renderStart = 0;
while(fullLine.length > 0) {
let splitAt;
const ANSI_REGEXP = ANSI.getFullMatchRegExp();
wantMore = true;
while((m = ANSI_REGEXP.exec(fullLine))) {
afterSeq = m.index + m[0].length;
if(afterSeq < MAX_CHARS) {
// after current seq
splitAt = afterSeq;
} else {
if(m.index < MAX_CHARS) {
// before last found seq
splitAt = m.index;
wantMore = false; // can't eat up any more
}
break; // seq's beyond this point are >= MAX_CHARS
}
}
if(splitAt) {
if(wantMore) {
splitAt = Math.min(fullLine.length, MAX_CHARS - 1);
}
} else {
splitAt = Math.min(fullLine.length, MAX_CHARS - 1);
}
const part = fullLine.slice(0, splitAt);
fullLine = fullLine.slice(splitAt);
renderStart += renderStringLength(part);
exportOutput += `${part}\r\n`;
if(fullLine.length > 0) { // more to go for this line?
exportOutput += `${ANSI.up()}${ANSI.right(renderStart)}`;
} else {
exportOutput += ANSI.up();
}
}
});
return cb(null, exportOutput);
}
return cb(null, output);
});
@ -561,17 +632,17 @@ function isAnsi(input) {
function splitTextAtTerms(s) {
return s.split(/\r\n|[\n\v\f\r\x85\u2028\u2029]/g);
}
/*
const fs = require('graceful-fs');
//let data = fs.readFileSync('/home/nuskooler/Downloads/art3.ans');
let data = fs.readFileSync('/home/nuskooler/Downloads/art3.ans');
//let data = fs.readFileSync('/home/nuskooler/dev/enigma-bbs/mods/themes/nu-xibalba/MATRIX1.ANS');
//let data = fs.readFileSync('/home/nuskooler/Downloads/ansi_diz_test/file_id.diz.2.ans');
let data = fs.readFileSync('/home/nuskooler/Downloads/acidunder.ans');
data = data.toString().replace(/\n/g,'\r\n');
//data = iconv.decode(data, 'cp437');
prepAnsi(data, { cols : 80, rows : 50 }, (err, out) => {
data = fs.readFileSync('/home/nuskooler/ownCloud/temp/BS-AUW.ANS');
data = iconv.decode(data, 'cp437');
prepAnsi(data, { cols : 80, rows : 50, exportMode : true, forceLineTerm : true }, (err, out) => {
out = iconv.encode(out, 'cp437');
fs.writeFileSync('/home/nuskooler/Downloads/art4.ans', out);
});
*/