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Viewing: Schema.js

'use strict';

var identity = require('../nodes/identity.js');
var map = require('./common/map.js');
var seq = require('./common/seq.js');
var string = require('./common/string.js');
var tags = require('./tags.js');

const sortMapEntriesByKey = (a, b) => a.key < b.key ? -1 : a.key > b.key ? 1 : 0;
class Schema {
    constructor({ compat, customTags, merge, resolveKnownTags, schema, sortMapEntries, toStringDefaults }) {
        this.compat = Array.isArray(compat)
            ? tags.getTags(compat, 'compat')
            : compat
                ? tags.getTags(null, compat)
                : null;
        this.name = (typeof schema === 'string' && schema) || 'core';
        this.knownTags = resolveKnownTags ? tags.coreKnownTags : {};
        this.tags = tags.getTags(customTags, this.name, merge);
        this.toStringOptions = toStringDefaults ?? null;
        Object.defineProperty(this, identity.MAP, { value: map.map });
        Object.defineProperty(this, identity.SCALAR, { value: string.string });
        Object.defineProperty(this, identity.SEQ, { value: seq.seq });
        // Used by createMap()
        this.sortMapEntries =
            typeof sortMapEntries === 'function'
                ? sortMapEntries
                : sortMapEntries === true
                    ? sortMapEntriesByKey
                    : null;
    }
    clone() {
        const copy = Object.create(Schema.prototype, Object.getOwnPropertyDescriptors(this));
        copy.tags = this.tags.slice();
        return copy;
    }
}

exports.Schema = Schema;

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