@prezly/theme-kit-react/build/hooks/useInfiniteLoading.mjs

Data layer and utility library for developing Prezly themes with NextJS

'use client';

function asyncGeneratorStep(n, t, e, r, o, a, c) { try { var i = n[a](c), u = i.value; } catch (n) { return void e(n); } i.done ? t(u) : Promise.resolve(u).then(r, o); }
function _asyncToGenerator(n) { return function () { var t = this, e = arguments; return new Promise(function (r, o) { var a = n.apply(t, e); function _next(n) { asyncGeneratorStep(a, r, o, _next, _throw, "next", n); } function _throw(n) { asyncGeneratorStep(a, r, o, _next, _throw, "throw", n); } _next(void 0); }); }; }
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
function _defineProperty(e, r, t) { return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, { value: t, enumerable: !0, configurable: !0, writable: !0 }) : e[r] = t, e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == typeof i ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != typeof t || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != typeof i) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
import { useCallback, useEffect, useReducer } from 'react';
var DEFAULT_RETRIES = 3;
function reduce(state, action) {
  switch (action.type) {
    case 'LOAD':
      {
        return _objectSpread(_objectSpread({}, state), {}, {
          loading: true,
          error: undefined,
          tries: state.tries + 1
        });
      }
    case 'LOADED':
      {
        var {
          data,
          offset: _offset,
          total
        } = action;
        return _objectSpread(_objectSpread({}, state), {}, {
          loading: false,
          data: [...state.data.slice(0, _offset), ...data],
          total,
          tries: 0
        });
      }
    case 'ERROR':
      {
        return _objectSpread(_objectSpread({}, state), {}, {
          loading: false,
          error: action.error
        });
      }
    default:
      return state;
  }
}
function initReducer() {
  var {
    data,
    total
  } = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
  return {
    error: undefined,
    data: data !== null && data !== void 0 ? data : [],
    loading: typeof data === 'undefined',
    total,
    tries: 0
  };
}
export function useInfiniteLoading(loaderFn, initialData) {
  var {
    retryOnError = DEFAULT_RETRIES
  } = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
  var [state, dispatch] = useReducer(reduce, initialData && Array.isArray(initialData) ? {
    data: initialData
  } : initialData, initReducer);
  var {
    loading,
    tries,
    error,
    data,
    total
  } = state;
  var offset = data.length;
  var load = useCallback(/*#__PURE__*/_asyncToGenerator(function* () {
    if (loading) return;
    dispatch({
      type: 'LOAD'
    });
    try {
      var loaded = yield loaderFn(offset);
      dispatch({
        type: 'LOADED',
        offset,
        data: loaded.data,
        total: loaded.total
      });
    } catch (loadingError) {
      dispatch({
        type: 'ERROR',
        error: toError(loadingError)
      });
    }
  }), [loading, offset, loaderFn]);
  useEffect(() => {
    if (data.length === 0 && (typeof total === 'undefined' || total > 0)) {
      load();
    }
  }, []); // eslint-disable-line react-hooks/exhaustive-deps

  useEffect(() => {
    if (error && tries <= retryOnError) {
      load();
    }
  }, [error, tries, retryOnError, load]);
  return {
    load,
    loading,
    error,
    data,
    count: data.length,
    total,
    done: typeof total !== 'undefined' && data.length >= total
  };
}
function toError(value) {
  if (value instanceof Error) {
    return value;
  }
  return new Error("Unknown error.");
}