svgicons2svgfont/dist/metadata.js

Read a set of SVG icons and output a SVG font

import { join, dirname, basename } from 'node:path';
import { rename } from 'node:fs';
function getMetadataService(options = {}) {
    const usedUnicodes = [];
    // Default options
    const _options = {
        prependUnicode: !!options.prependUnicode,
        startUnicode: 'number' === typeof options.startUnicode ? options.startUnicode : 0xea01,
    };
    return function getMetadataFromFile(file, cb) {
        const fileBasename = basename(file);
        const metadata = {
            path: file,
            name: '',
            unicode: [],
            renamed: false,
        };
        const matches = fileBasename.match(/^(?:((?:u[0-9a-f]{4,6},?)+)-)?(.+)\.svg$/i);
        metadata.name =
            matches && matches[2] ? matches[2] : 'icon' + _options.startUnicode;
        if (matches && matches[1]) {
            metadata.unicode = matches[1].split(',').map((match) => {
                match = match.substring(1);
                return match
                    .split('u')
                    .map((code) => String.fromCodePoint(parseInt(code, 16)))
                    .join('');
            });
            if (-1 !== usedUnicodes.indexOf(metadata.unicode[0])) {
                cb(new Error('The unicode codepoint of the glyph ' +
                    metadata.name +
                    ' seems to be already used by another glyph.'));
                return;
            }
            usedUnicodes.push(...metadata.unicode);
        }
        else {
            do {
                metadata.unicode[0] = String.fromCodePoint(_options.startUnicode++);
            } while (usedUnicodes.includes(metadata.unicode[0]));
            usedUnicodes.push(metadata.unicode[0]);
            if (_options.prependUnicode) {
                metadata.renamed = true;
                metadata.path = join(dirname(file), 'u' +
                    metadata.unicode[0].codePointAt(0)?.toString(16).toUpperCase() +
                    '-' +
                    fileBasename);
                rename(file, metadata.path, (err) => {
                    if (err) {
                        cb(new Error('Could not save codepoint: ' +
                            'u' +
                            metadata.unicode[0]
                                .codePointAt(0)
                                ?.toString(16)
                                .toUpperCase() +
                            ' for ' +
                            fileBasename));
                        return;
                    }
                    cb(null, metadata);
                });
            }
        }
        if (!metadata.renamed) {
            setImmediate(() => cb(null, metadata));
        }
    };
}
export { getMetadataService };
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