djlogan2 / chesspgn Goto Github PK

const exporter = require("exporter");

const tags = {
    Event: "An event",
    White: "Guy, White",
    Black: "Guy, Black"
};

const movelist = [
    {variations: [0]},
    {move: "e4", prev: 0, variations[1]},
    {move: "e5", prev: 1}
];
const config = {
    // If this exists, it will be written as a comment just before the final result
    textresult: "White Resigns",
    // If this exists, it will export no more than this many variations.
    // zero means it will only export the main line.
    maxvariations: 0,
    // If this exists, it will make the max line length of the movelist this.
    // The default is 255, per the pgn specification.
    linelength: 80,
    // If this exists, and isn't truthy, it will write only the movelist with no tags
    // at all. Usually used for things like getting only a movelist in unit tests.
    writetags: true,
    // If this exists, it won't write tags, any result, extra new lines, etc. It will
    // JUST return the moves. It's an extension of above really because it was still
    // writing other stuff. This will return JUST the move string. You can also use it
    // in combination with linelength and maxvariations.
    movesonly: false
};
// config itself can be left out (undefined)
const pgnstring = exporter.exportToPgn(tags, movelist, config);

importer.import('[Event "someevent"] *');
console.log(importer.gamelist);

importer.import(stream)
    .events.on('gamesready', (gamelist) => {
        // There will be one or more game objects here:
        console.log("tags=" + gamelist[0].tags + ", movelist=" + gamelist[0].movelist);
    })
    .on('end', () => {
        console.log("There are no more games in stream");
    });
// Because "gamesready" was listened to, this variable is unreliable. Do not use it.
console.log(importer.gamelist);

const node = {
  move: "e4", // The move being made in this node of the tree
  prev: 23,   // The index of this nodes parent. movelist[23] is this nodes parent
  variations: [40, 52, 63] // Our children. movelist[40], movelist[52], and movelist[63] are all variations of moves made in response to e4, with movelist[40], or the first variation in the list, being main line.
  comment: "This comment will show up in exported PGNs as the text in the {curly braces}. Imported {curly braces} will be here",
  nag: "$3", // This will be imported if valid nag syntax is found. On export though, it will export anything in this field, making PGNs invalid if it's not a true NAG.
  nonstandardcomment: "This comment appeared BEFORE the move", // If we have non-standard PGN comments, they will be saved here
  nonstandardnag: ["$4", "$5", "$6"] // If we have nonstandard NAGs (i.e. multiples, particularly non-standardized like 6. 'Nf6?? +- = !' they will be saved in this array.
};