@ohm-vision/react-async
Version:
Extentions to React to support asynchronous calls
194 lines (193 loc) • 8.7 kB
JavaScript
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __rest = (this && this.__rest) || function (s, e) {
var t = {};
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
t[p] = s[p];
if (s != null && typeof Object.getOwnPropertySymbols === "function")
for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
t[p[i]] = s[p[i]];
}
return t;
};
import { useState } from "react";
import { useAsync } from "./useAsync";
/**
* Represents a core fetch request
* @param param0 standard `fetch` props
* @param deps Dependency list
* @param destructor destructor
* @returns [ loading, `Response`, Error ]
*/
export function useFetch(_a, deps, destructor) {
var _this = this;
var url = _a.url, responseType = _a.responseType, init = __rest(_a, ["url", "responseType"]);
var _b = useState(), error = _b[0], setError = _b[1];
var _c = useAsync(function (_a) { return __awaiter(_this, [_a], void 0, function (_b) {
var response, error, originalResponse, body, _c, e_1;
var signal = _b.signal;
return __generator(this, function (_d) {
switch (_d.label) {
case 0:
response = incompleteResponse(url, responseType);
error = null;
_d.label = 1;
case 1:
_d.trys.push([1, 16, 17, 18]);
return [4 /*yield*/, fetch(url, __assign(__assign({}, init), { signal: signal }))];
case 2:
originalResponse = _d.sent();
// short-circuit to prevent further processing
if (signal.aborted) {
return [2 /*return*/];
}
if (!(responseType === "raw" || !response.ok)) return [3 /*break*/, 3];
// pass-through: no further processing
response = originalResponse;
return [3 /*break*/, 15];
case 3:
body = null;
_c = responseType;
switch (_c) {
case "arrayBuffer": return [3 /*break*/, 4];
case "blob": return [3 /*break*/, 6];
case "formData": return [3 /*break*/, 8];
case "text": return [3 /*break*/, 10];
case "json": return [3 /*break*/, 12];
}
return [3 /*break*/, 14];
case 4: return [4 /*yield*/, originalResponse.arrayBuffer()];
case 5:
body = _d.sent();
return [3 /*break*/, 14];
case 6: return [4 /*yield*/, originalResponse.blob()];
case 7:
body = _d.sent();
return [3 /*break*/, 14];
case 8: return [4 /*yield*/, originalResponse.formData()];
case 9:
body = _d.sent();
return [3 /*break*/, 14];
case 10: return [4 /*yield*/, originalResponse.text()];
case 11:
body = _d.sent();
return [3 /*break*/, 14];
case 12: return [4 /*yield*/, originalResponse.json()];
case 13:
body = _d.sent();
return [3 /*break*/, 14];
case 14:
response = {
ok: originalResponse.ok,
headers: originalResponse.headers,
redirected: originalResponse.redirected,
status: originalResponse.status,
statusText: originalResponse.statusText,
type: originalResponse.type,
url: originalResponse.url,
body: body
};
_d.label = 15;
case 15: return [3 /*break*/, 18];
case 16:
e_1 = _d.sent();
// only capture the error if it is not a result of a cancellation
if (signal.aborted) {
return [2 /*return*/];
}
error = e_1;
return [3 /*break*/, 18];
case 17:
setError(error);
return [2 /*return*/, response];
case 18: return [2 /*return*/];
}
});
}); }, deps, destructor), response = _c[0], loading = _c[1];
if (loading) {
return [loading, incompleteResponse(url, responseType), null];
}
return [loading, response, error];
}
/**
* Generates a fake response object to prevent null exceptions on initial deconstruction
* @param url
* @param responseType
* @returns
*/
function incompleteResponse(url, responseType) {
var res = {
headers: new Headers(),
ok: false,
redirected: false,
status: 0,
statusText: "LOADING",
type: "default",
url: toUrlString(url),
body: null,
};
if (responseType === "raw") {
return __assign(__assign({}, res), { bodyUsed: false, arrayBuffer: noopAsync, blob: noopAsync, formData: noopAsync, json: noopAsync, text: noopAsync, clone: function () { return incompleteResponse(url, responseType); } });
}
return res;
}
function noopAsync() {
return Promise.resolve();
}
function toUrlString(url) {
if (url instanceof URL) {
return url.toString();
}
else if (url instanceof Request) {
return url.url;
}
else {
return url;
}
}