79 lines
2.5 KiB
JavaScript
79 lines
2.5 KiB
JavaScript
import { __assign } from "tslib";
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function ItoI(a) {
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return a;
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}
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function innerCreateMedium(defaults, middleware) {
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if (middleware === void 0) { middleware = ItoI; }
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var buffer = [];
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var assigned = false;
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var medium = {
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read: function () {
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if (assigned) {
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throw new Error('Sidecar: could not `read` from an `assigned` medium. `read` could be used only with `useMedium`.');
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}
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if (buffer.length) {
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return buffer[buffer.length - 1];
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}
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return defaults;
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},
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useMedium: function (data) {
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var item = middleware(data, assigned);
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buffer.push(item);
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return function () {
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buffer = buffer.filter(function (x) { return x !== item; });
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};
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},
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assignSyncMedium: function (cb) {
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assigned = true;
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while (buffer.length) {
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var cbs = buffer;
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buffer = [];
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cbs.forEach(cb);
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}
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buffer = {
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push: function (x) { return cb(x); },
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filter: function () { return buffer; },
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};
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},
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assignMedium: function (cb) {
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assigned = true;
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var pendingQueue = [];
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if (buffer.length) {
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var cbs = buffer;
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buffer = [];
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cbs.forEach(cb);
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pendingQueue = buffer;
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}
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var executeQueue = function () {
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var cbs = pendingQueue;
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pendingQueue = [];
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cbs.forEach(cb);
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};
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var cycle = function () { return Promise.resolve().then(executeQueue); };
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cycle();
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buffer = {
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push: function (x) {
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pendingQueue.push(x);
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cycle();
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},
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filter: function (filter) {
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pendingQueue = pendingQueue.filter(filter);
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return buffer;
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},
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};
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},
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};
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return medium;
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}
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export function createMedium(defaults, middleware) {
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if (middleware === void 0) { middleware = ItoI; }
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return innerCreateMedium(defaults, middleware);
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}
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// eslint-disable-next-line @typescript-eslint/ban-types
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export function createSidecarMedium(options) {
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if (options === void 0) { options = {}; }
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var medium = innerCreateMedium(null);
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medium.options = __assign({ async: true, ssr: false }, options);
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return medium;
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}
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