semantic-network
Version:
A utility library for manipulating a list of links that form a semantic interface to a network of resources.
132 lines • 7.83 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) {
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function verb(n) { return function (v) { return step([n, v]); }; }
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case 0: case 1: t = op; break;
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var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.get = void 0;
var namedRepresentationFactory_1 = require("./namedRepresentationFactory");
var trackedRepresentationFactory_1 = require("./trackedRepresentationFactory");
var representationUtil_1 = require("../utils/representationUtil");
var anylogger_1 = __importDefault(require("anylogger"));
var instanceOfCollection_1 = require("../utils/instanceOf/instanceOfCollection");
var linkRelation_1 = require("../linkRelation");
var log = (0, anylogger_1.default)('get');
/**
* Retrieve a resource based on its context and options, and its current state (ie hydrated or not)
*
* Note: a returned resource will not always be the same (ie self) but rather a different linked resource.
*
* TODO: where 'named' resources are known, return that type based on the 'rel' in options.
*/
function get(resource, options) {
return __awaiter(this, void 0, void 0, function () {
var _a, _b, rel, _c, where, relIsNotSelfOrEmpty, namedSubResource, collection, item;
return __generator(this, function (_d) {
switch (_d.label) {
case 0:
_a = __assign({}, options), _b = _a.rel, rel = _b === void 0 ? undefined : _b, _c = _a.where, where = _c === void 0 ? undefined : _c;
relIsNotSelfOrEmpty = rel && rel !== linkRelation_1.LinkRelation.Self;
if (!relIsNotSelfOrEmpty) return [3 /*break*/, 2];
log.debug('get context resource on \'self\'');
return [4 /*yield*/, trackedRepresentationFactory_1.TrackedRepresentationFactory.load(resource, __assign(__assign({}, options), { rel: linkRelation_1.LinkRelation.Self }))];
case 1:
resource = _d.sent();
_d.label = 2;
case 2:
if (!where) return [3 /*break*/, 10];
log.debug('using \'where\' to locate resource on get');
if (!relIsNotSelfOrEmpty) return [3 /*break*/, 4];
return [4 /*yield*/, namedRepresentationFactory_1.NamedRepresentationFactory.load(resource, options)];
case 3:
namedSubResource = _d.sent();
if (namedSubResource) {
log.debug('named sub resource found on \'%s\'', rel);
resource = namedSubResource;
// now that sub resource is loaded, re-contextualise to this resource (ie will become 'self')
options === null || options === void 0 ? true : delete options.rel;
}
else {
log.warn('named sub resource not found on \'%s\'', rel);
}
_d.label = 4;
case 4:
if (!(0, instanceOfCollection_1.instanceOfCollection)(resource)) return [3 /*break*/, 9];
log.debug('get collection resource (with items: %s)', (options === null || options === void 0 ? void 0 : options.includeItems) || false);
return [4 /*yield*/, trackedRepresentationFactory_1.TrackedRepresentationFactory.load(resource, options)];
case 5:
collection = _d.sent();
item = representationUtil_1.RepresentationUtil.findInCollection(collection, options);
if (!item) return [3 /*break*/, 7];
log.debug('item in collection found');
return [4 /*yield*/, trackedRepresentationFactory_1.TrackedRepresentationFactory.load(item, options)];
case 6: return [2 /*return*/, _d.sent()];
case 7:
log.debug('item in collection not found ');
return [2 /*return*/, undefined];
case 8: return [3 /*break*/, 10];
case 9:
log.warn('Where options cannot be used outside of a collection, skipping where');
_d.label = 10;
case 10:
if (!relIsNotSelfOrEmpty) return [3 /*break*/, 12];
log.debug('get named singleton sub resource');
return [4 /*yield*/, namedRepresentationFactory_1.NamedRepresentationFactory.load(resource, options)];
case 11: return [2 /*return*/, _d.sent()];
case 12:
// otherwise all resources
log.debug('get resource');
return [4 /*yield*/, trackedRepresentationFactory_1.TrackedRepresentationFactory.load(resource, options)];
case 13: return [2 /*return*/, _d.sent()];
}
});
});
}
exports.get = get;
//# sourceMappingURL=get.js.map