@snap/camera-kit/dist/handlers/rateLimitingHandler.js

Camera Kit Web

import { __awaiter } from "tslib";
import { createMappingHandler } from "./mappingHandler";
const delay = (duration) => new Promise((resolve) => setTimeout(resolve, duration));
export const createRateLimitingHandler = (duration, pageVisibility) => {
    let mostRecentSendTime = undefined;
    const mappingHandler = createMappingHandler((request) => __awaiter(void 0, void 0, void 0, function* () {
        if (mostRecentSendTime !== undefined) {
            const millisUntilNextSend = duration - (Date.now() - mostRecentSendTime);
            if (millisUntilNextSend > 0)
                yield delay(millisUntilNextSend);
        }
        mostRecentSendTime = Date.now();
        return request;
    }), pageVisibility, 1);
    return (next) => (request, metadata) => {
        if (pageVisibility && pageVisibility.isDuringVisibilityTransition("hidden"))
            return next(request, metadata);
        return mappingHandler(next)(request, metadata);
    };
};
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