ClearUrls/core_js/utils/Multimap.js

"use strict";
/*
 * ClearURLs
 * Copyright (c) 2017-2022 Kevin Röbert.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * Models a multimap backed by a {@link Set}.
 */
class Multimap {
    constructor() {
        Object.defineProperty(this, "_map", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: void 0
        });
        Object.defineProperty(this, "_size", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: void 0
        });
        this._size = 0;
        this._map = new Map();
    }
    get size() {
        return this._size;
    }
    get(key) {
        const values = this._map.get(key);
        if (values) {
            return new Set(values);
        }
        else {
            return new Set();
        }
    }
    put(key, value) {
        let values = this._map.get(key);
        if (!values) {
            values = new Set();
        }
        const count = values.size;
        values.add(value);
        if (values.size === count) {
            return false;
        }
        this._map.set(key, values);
        this._size++;
        return true;
    }
    has(key) {
        return this._map.has(key);
    }
    hasEntry(key, value) {
        const values = this._map.get(key);
        if (!values) {
            return false;
        }
        return values.has(value);
    }
    delete(key) {
        const values = this._map.get(key);
        if (values && this._map.delete(key)) {
            this._size -= values.size;
            return true;
        }
        return false;
    }
    deleteEntry(key, value) {
        const values = this._map.get(key);
        if (values) {
            if (!values.delete(value)) {
                return false;
            }
            this._size--;
            return true;
        }
        return false;
    }
    clear() {
        this._map.clear();
        this._size = 0;
    }
    entries() {
        const self = this;
        function* gen() {
            for (const [key, values] of self._map.entries()) {
                for (const value of values) {
                    yield [key, value];
                }
            }
        }
        return gen();
    }
    values() {
        const self = this;
        function* gen() {
            for (const [, value] of self.entries()) {
                yield value;
            }
        }
        return gen();
    }
    keys() {
        return this._map.keys();
    }
    forEach(callback, thisArg) {
        for (const [key, value] of this.entries()) {
            callback.call(thisArg === undefined ? this : thisArg, key, value, this);
        }
    }
    [Symbol.iterator]() {
        return this.entries();
    }
}