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

Camera Kit Web

import { __awaiter } from "tslib";
export const createMappingHandler = (map, pageVisibility, maxMapConcurrency = Number.POSITIVE_INFINITY) => {
    const buffer = [];
    let mapConcurrency = 0;
    const processRequest = (request) => __awaiter(void 0, void 0, void 0, function* () {
        try {
            mapConcurrency++;
            const mapped = request.map();
            if (mapped instanceof Promise)
                request.next(yield mapped);
            else if (mapped)
                request.next(mapped);
        }
        catch (error) {
            request.reject(error);
        }
        finally {
            mapConcurrency--;
        }
        while (buffer.length > 0 && mapConcurrency < maxMapConcurrency) {
            processRequest(buffer.shift());
        }
    });
    if (pageVisibility) {
        pageVisibility.onPageHidden(() => {
            while (buffer.length > 0)
                processRequest(buffer.shift());
        });
    }
    return (next) => (request, metadata) => {
        return new Promise((resolve, reject) => {
            const mappableRequest = {
                map: () => map(request),
                next: (mappedRequest) => next(mappedRequest, metadata).then(resolve).catch(reject),
                reject,
            };
            if (mapConcurrency < maxMapConcurrency)
                processRequest(mappableRequest);
            else
                buffer.push(mappableRequest);
        });
    };
};
//# sourceMappingURL=mappingHandler.js.map