opendash/dist/hooks/useDataItemHistory.js

open.DASH data visualization framework

var __spreadArrays = (this && this.__spreadArrays) || function () {
    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;
    for (var r = Array(s), k = 0, i = 0; i < il; i++)
        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)
            r[k] = a[j];
    return r;
};
import { useState, useEffect, useRef } from "react";
import { useOpenDashServices, } from "..";
export function useDataItemHistory(item, options) {
    var _a, _b, _c, _d, _e, _f, _g;
    var DataService = useOpenDashServices().DataService;
    var loadingRef = useRef(false);
    var bufferRef = useRef([]);
    var _h = useState([]), result = _h[0], setResult = _h[1];
    useEffect(function () {
        var _a;
        if (item && ((_a = options) === null || _a === void 0 ? void 0 : _a.live)) {
            return DataService.subscribeValue(item, function () {
                var value = DataService._getValueOrThrowSync(item);
                if (loadingRef.current) {
                    bufferRef.current.push(value);
                }
                else {
                    setResult(function (current) { return __spreadArrays(current, [value]); });
                }
            });
        }
    }, [(_a = item) === null || _a === void 0 ? void 0 : _a.id, (_b = item) === null || _b === void 0 ? void 0 : _b.source, (_c = options) === null || _c === void 0 ? void 0 : _c.live]);
    useEffect(function () {
        if (item) {
            loadingRef.current = true;
            DataService.fetchValues(item, options).then(function (result) {
                loadingRef.current = false;
                setResult(__spreadArrays(result, bufferRef.current));
            }, function (error) {
                loadingRef.current = false;
                console.error(error);
                setResult([]);
            });
        }
        else {
            setResult([]);
        }
    }, [(_d = item) === null || _d === void 0 ? void 0 : _d.id, (_e = item) === null || _e === void 0 ? void 0 : _e.source, (_f = options) === null || _f === void 0 ? void 0 : _f.start, (_g = options) === null || _g === void 0 ? void 0 : _g.end]);
    return result;
}
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