diffusion/src/internal/topics/selector-set.js

Diffusion JavaScript client

"use strict";
/**
 * @module Topics
 */
var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        if (typeof b !== "function" && b !== null)
            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
var __values = (this && this.__values) || function(o) {
    var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
    if (m) return m.call(o);
    if (o && typeof o.length === "number") return {
        next: function () {
            if (o && i >= o.length) o = void 0;
            return { value: o && o[i++], done: !o };
        }
    };
    throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.SelectorSet = exports.DELIMITER = void 0;
var abstract_topic_selector_1 = require("./../topics/abstract-topic-selector");
var utils = require("./../topics/topic-path-utils");
var math_1 = require("./../util/math");
var topic_selector_1 = require("../../selectors/topic-selector");
exports.DELIMITER = '////';
/**
 * Extract the longest common prefix from a set of topic selectors
 *
 * @param  selectors  the topic selectors
 * @return            the longest common prefix
 */
function extractCommonPrefix(selectors) {
    var e_1, _a;
    if (selectors.length === 0) {
        return '';
    }
    // set initial value to Integer.MAX_VALUE
    var minimum = math_1.MAX_INT32;
    var prefixes = [];
    selectors.forEach(function (selector, i) {
        var part = utils.split(selector.prefix);
        minimum = Math.min(minimum, part.length);
        prefixes[i] = part;
    });
    var composite = [];
    assembly: for (var j = 0; j < minimum; ++j) {
        var part = prefixes[0][j];
        try {
            for (var prefixes_1 = (e_1 = void 0, __values(prefixes)), prefixes_1_1 = prefixes_1.next(); !prefixes_1_1.done; prefixes_1_1 = prefixes_1.next()) {
                var prefix = prefixes_1_1.value;
                if (part !== prefix[j]) {
                    break assembly;
                }
            }
        }
        catch (e_1_1) { e_1 = { error: e_1_1 }; }
        finally {
            try {
                if (prefixes_1_1 && !prefixes_1_1.done && (_a = prefixes_1.return)) _a.call(prefixes_1);
            }
            finally { if (e_1) throw e_1.error; }
        }
        composite.push(part);
        composite.push(utils.PATH_SEPARATOR);
    }
    return utils.canonicalise(composite.join(''));
}
/**
 * Implementation of {@link AbstractTopicSelector} for selector sets
 */
var SelectorSet = /** @class */ (function (_super) {
    __extends(SelectorSet, _super);
    /**
     * Create a new SelectorSet instance
     *
     * @param  selectors  the topic selectors in the set
     */
    function SelectorSet(selectors) {
        var _this = this;
        var expanded = [];
        selectors.forEach(function (selector) {
            if (selector instanceof SelectorSet) {
                selector.selectors.forEach(function (nested) {
                    expanded.push(nested);
                });
            }
            else {
                expanded.push(selector);
            }
        });
        var remainder = expanded.join(exports.DELIMITER);
        var prefix = extractCommonPrefix(expanded);
        _this = _super.call(this, topic_selector_1.Type.SELECTOR_SET, prefix, topic_selector_1.Prefix.SELECTOR_SET + remainder) || this;
        _this.selectors = expanded;
        return _this;
    }
    /**
     * @inheritdoc
     */
    SelectorSet.prototype.selects = function (topicPath) {
        var e_2, _a;
        try {
            for (var _b = __values(this.selectors), _c = _b.next(); !_c.done; _c = _b.next()) {
                var selector = _c.value;
                if (selector.selects(topicPath)) {
                    return true;
                }
            }
        }
        catch (e_2_1) { e_2 = { error: e_2_1 }; }
        finally {
            try {
                if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
            }
            finally { if (e_2) throw e_2.error; }
        }
        return false;
    };
    /**
     * @inheritdoc
     */
    SelectorSet.prototype.doSelects = function (canonical) {
        return this.selects(canonical);
    };
    return SelectorSet;
}(abstract_topic_selector_1.AbstractTopicSelector));
exports.SelectorSet = SelectorSet;