audiobookshelf/client/assets/fastSort.js

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2021-08-19 03:18:44 +02:00
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global['fast-sort'] = {}));
}(this, (function (exports) {
'use strict';
// >>> INTERFACES <<<
// >>> HELPERS <<<
var castComparer = function (comparer) { return function (a, b, order) { return comparer(a, b, order) * order; }; };
var throwInvalidConfigErrorIfTrue = function (condition, context) {
if (condition)
throw Error("Invalid sort config: " + context);
};
var unpackObjectSorter = function (sortByObj) {
var _a = sortByObj || {}, asc = _a.asc, desc = _a.desc;
var order = asc ? 1 : -1;
var sortBy = (asc || desc);
// Validate object config
throwInvalidConfigErrorIfTrue(!sortBy, 'Expected `asc` or `desc` property');
throwInvalidConfigErrorIfTrue(asc && desc, 'Ambiguous object with `asc` and `desc` config properties');
var comparer = sortByObj.comparer && castComparer(sortByObj.comparer);
return { order: order, sortBy: sortBy, comparer: comparer };
};
// >>> SORTERS <<<
var multiPropertySorterProvider = function (defaultComparer) {
return function multiPropertySorter(sortBy, sortByArr, depth, order, comparer, a, b) {
var valA;
var valB;
if (typeof sortBy === 'string') {
valA = a[sortBy];
valB = b[sortBy];
}
else if (typeof sortBy === 'function') {
valA = sortBy(a);
valB = sortBy(b);
}
else {
var objectSorterConfig = unpackObjectSorter(sortBy);
return multiPropertySorter(objectSorterConfig.sortBy, sortByArr, depth, objectSorterConfig.order, objectSorterConfig.comparer || defaultComparer, a, b);
}
var equality = comparer(valA, valB, order);
if ((equality === 0 || (valA == null && valB == null)) &&
sortByArr.length > depth) {
return multiPropertySorter(sortByArr[depth], sortByArr, depth + 1, order, comparer, a, b);
}
return equality;
};
};
function getSortStrategy(sortBy, comparer, order) {
// Flat array sorter
if (sortBy === undefined || sortBy === true) {
return function (a, b) { return comparer(a, b, order); };
}
// Sort list of objects by single object key
if (typeof sortBy === 'string') {
throwInvalidConfigErrorIfTrue(sortBy.includes('.'), 'String syntax not allowed for nested properties.');
return function (a, b) { return comparer(a[sortBy], b[sortBy], order); };
}
// Sort list of objects by single function sorter
if (typeof sortBy === 'function') {
return function (a, b) { return comparer(sortBy(a), sortBy(b), order); };
}
// Sort by multiple properties
if (Array.isArray(sortBy)) {
var multiPropSorter_1 = multiPropertySorterProvider(comparer);
return function (a, b) { return multiPropSorter_1(sortBy[0], sortBy, 1, order, comparer, a, b); };
}
// Unpack object config to get actual sorter strategy
var objectSorterConfig = unpackObjectSorter(sortBy);
return getSortStrategy(objectSorterConfig.sortBy, objectSorterConfig.comparer || comparer, objectSorterConfig.order);
}
var sortArray = function (order, ctx, sortBy, comparer) {
var _a;
if (!Array.isArray(ctx)) {
return ctx;
}
// Unwrap sortBy if array with only 1 value to get faster sort strategy
if (Array.isArray(sortBy) && sortBy.length < 2) {
_a = sortBy, sortBy = _a[0];
}
return ctx.sort(getSortStrategy(sortBy, comparer, order));
};
// >>> Public <<<
var createNewSortInstance = function (opts) {
var comparer = castComparer(opts.comparer);
return function (_ctx) {
var ctx = Array.isArray(_ctx) && !opts.inPlaceSorting
? _ctx.slice()
: _ctx;
return {
/**
* Sort array in ascending order.
* @example
* sort([3, 1, 4]).asc();
* sort(users).asc(u => u.firstName);
* sort(users).asc([
* U => u.firstName
* u => u.lastName,
* ]);
*/
asc: function (sortBy) {
return sortArray(1, ctx, sortBy, comparer);
},
/**
* Sort array in descending order.
* @example
* sort([3, 1, 4]).desc();
* sort(users).desc(u => u.firstName);
* sort(users).desc([
* U => u.firstName
* u => u.lastName,
* ]);
*/
desc: function (sortBy) {
return sortArray(-1, ctx, sortBy, comparer);
},
/**
* Sort array in ascending or descending order. It allows sorting on multiple props
* in different order for each of them.
* @example
* sort(users).by([
* { asc: u => u.score }
* { desc: u => u.age }
* ]);
*/
by: function (sortBy) {
return sortArray(1, ctx, sortBy, comparer);
},
};
};
};
var defaultComparer = function (a, b, order) {
if (a == null)
return order;
if (b == null)
return -order;
if (a < b)
return -1;
if (a === b)
return 0;
return 1;
};
var sort = createNewSortInstance({
comparer: defaultComparer,
});
var inPlaceSort = createNewSortInstance({
comparer: defaultComparer,
inPlaceSorting: true,
});
exports.createNewSortInstance = createNewSortInstance;
exports.inPlaceSort = inPlaceSort;
exports.sort = sort;
Object.defineProperty(exports, '__esModule', { value: true });
})));