scryfall-sdk/out/util/MagicEmitter.js

A Node.js SDK for https://scryfall.com/docs/api written in Typescript.

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __await = (this && this.__await) || function (v) { return this instanceof __await ? (this.v = v, this) : new __await(v); }
var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _arguments, generator) {
    if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
    var g = generator.apply(thisArg, _arguments || []), i, q = [];
    return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i;
    function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }
    function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }
    function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }
    function fulfill(value) { resume("next", value); }
    function reject(value) { resume("throw", value); }
    function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }
};
Object.defineProperty(exports, "__esModule", { value: true });
const EventEmitter_1 = require("./EventEmitter");
class MagicEmitter extends EventEmitter_1.default {
    get ended() {
        return this._ended;
    }
    get cancelled() {
        return this._cancelled;
    }
    get willCancelAfterPage() {
        return this._willCancelAfterPage;
    }
    constructor() {
        super();
        this._ended = false;
        this._cancelled = false;
        this._willCancelAfterPage = false;
        this.mappers = [];
        this.on("end", () => { this._ended = true; });
        this.on("cancel", () => { this._ended = true; });
    }
    on(event, listener) {
        super.on(event, listener);
        return this;
    }
    emit(event, ...data) {
        if (event === "data")
            return super.emit(event, this.mappers.reduce((current, mapper) => mapper(current), data[0]));
        return super.emit(event, ...data);
    }
    emitAll(event, ...data) {
        for (const item of data) {
            super.emit(event, event !== "data" ? item : this.mappers.reduce((current, mapper) => mapper(current), item));
            if (this._cancelled)
                break;
        }
    }
    cancel() {
        this._cancelled = true;
        this.emit("cancel");
        return this;
    }
    cancelAfterPage() {
        this._willCancelAfterPage = true;
        return this;
    }
    waitForAll() {
        return __awaiter(this, void 0, void 0, function* () {
            return new Promise((resolve, reject) => {
                const results = [];
                results.not_found = [];
                this.on("data", result => { results.push(result); });
                this.on("not_found", notFound => { results.not_found.push(notFound); });
                this.on("done", () => resolve(results));
                this.on("error", reject);
            });
        });
    }
    [Symbol.asyncIterator]() {
        return this.generate("data");
    }
    all() {
        return this.generate("data");
    }
    notFound() {
        return this.generate("not_found");
    }
    map(mapper) {
        this.mappers.push(mapper);
        return this;
    }
    generate(event) {
        return __asyncGenerator(this, arguments, function* generate_1() {
            // save the new data on each event
            const unyielded = [];
            this.on(event, data => unyielded.push(data));
            while (!this._ended) {
                // wait for the next event before yielding any new data
                yield __await(new Promise(resolve => this.once(event, resolve)));
                let data;
                while (data = unyielded.shift())
                    yield yield __await(data);
            }
        });
    }
}
exports.default = MagicEmitter;