zip-tz
Version:
Convert ZIP code to Time Zone
85 lines (81 loc) • 6.16 kB
JavaScript
/* zip-tz@1.0.1 MIT https://alecperkins.net/tools/zip-tz/ */
"use strict";
const MAPPING = {
"America/New_York": [[501, 99], [500, 31399], [31955, 2], [32100, 2402], 36353, [36362, 1], [36366, 3], [36371, 1], [36376, 1], [36801, 2], [36806, 5], [36813, 3], [36819, 3], [36824, 1], 36828, [36830, 2], [36835, 2], 36840, [36842, 1], [36849, 1], [36852, 1], [36860, 3], [36868, 4], 36876, 36878, 36880, [36883, 2], [36890, 2], [36900, 99], [37100, 121], [37223, 276], [39312, 297], [39616, 1], [39620, 18], 39641, [39649, 1], [39654, 14], 39674, 39676, [39700, 1799], 41583, 41649, 41702, 41708, 41734, 41750, [41756, 1], [41766, 5], [41782, 1], 41786, 41874, 41902, [42000, 100], [42130, 10], [42146, 64], [42217, 1], [42223, 1], [42231, 8], 42247, [42256, 1], [42275, 5], [42282, 3517], [46000, 29], [46035, 431], [46469, 543], [47015, 3], [47020, 1], 47023, [47026, 3], [47031, 3], [47040, 8], [47052, 2], [47056, 16], 47074, 47077, [47079, 5], [47089, 10], 47113, [47159, 4], 47226, 47238, [47240, 5], [47300, 120], [47422, 19], [47443, 3], [47448, 1], [47451, 10], [47464, 11], [47479, 2020], [56400, 99]],
"America/Puerto_Rico": [[601, 199], [300, 99]],
"America/St_Thomas": [[801, 99]],
"America/Chicago": [[32401, 54], [58, 141], [2603, 1849], [4454, 7], [4464, 1], 4470, [4473, 2], [4478, 422], [4904, 1], 4912, [4917, 1], 4923, [4926, 1], 4929, [4933, 1], [4938, 1], 4941, [4944, 4], 4951, [4954, 5], [4964, 3], [4973, 2], 4977, 4979, [4981, 1], [4986, 3], [4993, 6], [5100, 99], 5322, [5600, 1811], [7710, 5], [7718, 1], [7739, 1], [7742, 6], [7751, 2], [7769, 4], 7775, [7777, 22], [9600, 82], [9684, 64], [9750, 51], [9803, 4], [9809, 24], [9835, 14], [9851, 4], [9858, 7], [9872, 9], [9884, 1], [9887, 86], [9975, 26], [10003, 96], [10201, 28], [10241, 4], [10311, 5], [10319, 3], [10325, 5], [10340, 6], [10348, 7], [10358, 16], 10381, [13900, 199], [14130, 4], [14567, 1], [15113, 1], 15119, 15122, [15124, 1], 15130, [15135, 4], [15149, 2], 15155, 15173, [15175, 1], 15178, [15185, 3], [15200, 12], [15214, 44], [15264, 61], [15327, 10], 15339, [15346, 53], 15521, 15542, 15547, 15550, [15562, 1], [15576, 2], [17600, 6899], [24600, 519], [25121, 14], [25137, 4], [25143, 2], [25147, 2], [25154, 11], [25167, 5], 25175, [25178, 21], [25230, 1], [25245, 2], [25600, 527], [26129, 2], [26134, 26], 26162, [26164, 3], [26169, 30], 26230, 26237, [26300, 299], [27600, 7731], 35333, [35335, 4], [35342, 14], [35363, 71], [35436, 19], [35458, 18], [35479, 1140], 36621, [36623, 2], [36627, 1], 36631, [36633, 2], [36637, 2], [36641, 2], [36645, 74], [36722, 1], 36729, 36731, [36734, 4], [36741, 1], 36750, [36756, 2], 36760, [36762, 1], [36765, 1], [36768, 20], [36800, 9], [36811, 3], 36816, [36819, 80], [37600, 9819], [47429, 4], [47441, 4], 47447, 47451, [47453, 46]],
"America/Denver": [57521, 16, 22, 26, [30, 3], 46, [53, 1], [56, 1], [80, 29], [112, 12], [128, 351], 1008, [1012, 1], 1041, 1043, 1048, [1080, 29], [1111, 5], [1118, 61], [1480, 999], 10212, 10214, [10220, 1], [10237, 5], 10315, [10336, 1], [10357, 1], 11500, 11502, 11506, [11509, 1], 11512, 11516, 11520, 11524, [11600, 1], [11604, 4], 11610, [11612, 1], [11619, 1], [11623, 6], [11631, 4], 11639, 11641, 11644, 11647, [11669, 10], 11690, 11695, [11697, 1], [11780, 699], [22300, 8], [22314, 6], 22326, [22328, 2], 22332, [22380, 3599], 26026, [26028, 2], [26080, 199], [26480, 999], 28483, 28499, 28510, 28512, 28514, [28519, 1], [28523, 1], [28532, 247], [28982, 51], [29035, 2344], [40380, 2], 40385, [40387, 92]],
"America/Los_Angeles": [[83501, 45], 47, [51, 48], [300, 199], [5400, 122], [5524, 7675], [13500, 899], [14403, 1], 14406, [14500, 1499]],
"America/Phoenix": [[85001, 1002], [1004, 14], [1020, 9], 1031, 1033, [1035, 3], [1041, 1], [1045, 6], [1300, 201], 1554, 4023],
"Pacific/Honolulu": [[96701, 97], [100, 96]],
"Pacific/Pago_Pago": [[96799, 1]],
"Pacific/Wake": [[96898, 11]],
"Pacific/Guam": [[96910, 28]],
"Pacific/Palau": [[96939, 1]],
"Pacific/Pohnpei": [96941],
"Pacific/Chuuk": [[96942, 1]],
"Pacific/Kosrae": [[96944, 5]],
"Pacific/Saipan": [[96950, 9]],
"Pacific/Majuro": [[96960, 9]],
"Pacific/Kwajalein": [[96970, 30]],
"America/Anchorage": [[99501, 44], [47, 402]],
"America/Adak": [[99546, 1]],
};
const ZIP_REGEX = /^\d{5}(-\d{4})?$/;
let range_list;
const tz_names = [];
function zipTZ(zip) {
if (!range_list) {
range_list = [];
const entries = Object.entries(MAPPING);
entries.forEach((entry, i) => {
const [tz, ranges] = entry;
let offset = 0;
tz_names.push(tz);
for (const r of ranges) {
if (typeof r === "number") {
range_list.push([r + offset, r + offset, i]);
}
else {
const range_start = r[0];
const range_end_diff = r[1];
range_list.push([
range_start + offset,
range_end_diff + range_start + offset,
i,
]);
}
if (!offset) {
offset = typeof ranges[0] === "number" ? ranges[0] : ranges[0][0];
}
}
});
range_list.sort((a, b) => a[0] - b[0]);
}
if (typeof zip !== "string" || !ZIP_REGEX.test(zip)) {
throw new Error(`Invalid ZIP code format: ${zip}`);
}
const zipN = parseInt(zip);
let lower = 0;
let upper = range_list.length - 1;
while (lower <= upper) {
const mid = Math.round((upper - lower) / 2) + lower;
const [start, end, tz_i] = range_list[mid];
if (zipN > end) {
lower = mid + 1;
}
else if (zipN < start) {
upper = mid - 1;
}
else {
return tz_names[tz_i];
}
}
return null;
}
Object.defineProperty(module.exports, "version", { value: "1.0.1" });
Object.defineProperty(module.exports, "__esModule", { value: true });
Object.assign(zipTZ, exports);
module.exports = zipTZ;
module.exports.default = zipTZ;