semantic-network
Version:
A utility library for manipulating a list of links that form a semantic interface to a network of resources.
162 lines • 9.54 kB
JavaScript
;
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var __importDefault = (this && this.__importDefault) || function (mod) {
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Object.defineProperty(exports, "__esModule", { value: true });
exports.NamedRepresentationFactory = exports.firstLinkNameStrategy = void 0;
var semantic_link_1 = require("semantic-link");
var linkRelConvertUtil_1 = require("../utils/linkRelConvertUtil");
var linkRelation_1 = require("../linkRelation");
var trackedRepresentationUtil_1 = require("../utils/trackedRepresentationUtil");
var trackedRepresentationFactory_1 = require("./trackedRepresentationFactory");
var anylogger_1 = __importDefault(require("anylogger"));
var sparseRepresentationFactory_1 = require("./sparseRepresentationFactory");
var representationUtil_1 = require("../utils/representationUtil");
var log = (0, anylogger_1.default)('NamedRepresentationFactory');
/**
* Where the rel is multiple pick the first matched link to be converted as the name, otherwise use the given rel
* @param rel
* @param representation
*/
var firstLinkNameStrategy = function (includeTitle) { return function (rel, representation) {
if (representation && Array.isArray(rel)) {
var _a = __read(semantic_link_1.LinkUtil.filter(representation, rel), 1), first = _a[0];
if (first) {
return linkRelConvertUtil_1.LinkRelConvertUtil.relTypeToCamel(first, includeTitle);
}
else {
// broken and should not fall through
// what is the return strategy on link not found?
log.error('Rel not found on representation');
return '';
}
}
else {
return linkRelConvertUtil_1.LinkRelConvertUtil.relTypeToCamel(rel, includeTitle);
}
}; };
exports.firstLinkNameStrategy = firstLinkNameStrategy;
var NamedRepresentationFactory = exports.NamedRepresentationFactory = /** @class */ (function () {
function NamedRepresentationFactory() {
}
/**
* Manages the loading (returning) of a named resource (sub-resource collection or singleton) on a context based on
* the {@link ResourceQueryOptions.rel}.
*
* Note: the naming strategy is currently not injectable but the value can be overridden {@link ResourceQueryOptions.name}
* @see LinkRelConvertUtil.relTypeToCamel
*
* @see TrackedRepresentationFactory
* @param resource context resource that has the sub-resource added (and is tracked {@link State.collection} and {@link State.singleton})
* @param options specify the {@link ResourceQueryOptions.rel} to pick the name resource
*/
NamedRepresentationFactory.load = function (resource, options) {
return __awaiter(this, void 0, void 0, function () {
var rel, useLegacyNameStrategy, nameStrategy, name, namedResource, uri, sparse, namedResource;
var _a, _b, _c, _d, _e;
return __generator(this, function (_f) {
switch (_f.label) {
case 0:
rel = (_a = __assign({}, options), _b = _a.rel, _b === void 0 ? undefined : _b), useLegacyNameStrategy = (_c = _a.useLegacyNameStrategy, _c === void 0 ? false : _c);
nameStrategy = (_d = __assign({}, options).nameStrategy, _d === void 0 ? useLegacyNameStrategy ? (0, exports.firstLinkNameStrategy)(false) : NamedRepresentationFactory.defaultNameStrategy : _d);
name = (_e = __assign({}, options).name, _e === void 0 ? nameStrategy(rel, resource) : _e);
if (!(rel && name)) return [3 /*break*/, 6];
if (!trackedRepresentationUtil_1.TrackedRepresentationUtil.isTracked(resource, name)) return [3 /*break*/, 3];
namedResource = representationUtil_1.RepresentationUtil.getProperty(resource, name);
if (!namedResource) return [3 /*break*/, 2];
log.debug('');
return [4 /*yield*/, trackedRepresentationFactory_1.TrackedRepresentationFactory.load(namedResource, __assign(__assign({}, options), { rel: linkRelation_1.LinkRelation.Self }))];
case 1:
// don't just return value but ensure it has loading rules respected (eg expires)
return [2 /*return*/, _f.sent()];
case 2:
// if the resource is tracked it is very unlikely that this resource doesn't exist
log.warn('Named resource \'%s\' on %s is undefined', name, semantic_link_1.LinkUtil.getUri(resource, linkRelation_1.LinkRelation.Self));
return [3 /*break*/, 5];
case 3:
uri = semantic_link_1.LinkUtil.getUri(resource, rel);
if (!uri) return [3 /*break*/, 5];
sparse = sparseRepresentationFactory_1.SparseRepresentationFactory.make(__assign(__assign({}, options), { uri: uri }));
return [4 /*yield*/, trackedRepresentationFactory_1.TrackedRepresentationFactory.load(sparse, __assign(__assign({}, options), { rel: linkRelation_1.LinkRelation.Self }))];
case 4:
namedResource = _f.sent();
if (namedResource) {
trackedRepresentationUtil_1.TrackedRepresentationUtil.add(resource, name, namedResource, options);
}
return [2 /*return*/, namedResource];
case 5: return [3 /*break*/, 7];
case 6:
log.warn('Named resource \'%s\' not found on %s', name, semantic_link_1.LinkUtil.getUri(resource, linkRelation_1.LinkRelation.Self));
return [2 /*return*/, Promise.reject('No named resource (or rel) specified')];
case 7: return [2 /*return*/, undefined];
}
});
});
};
NamedRepresentationFactory.defaultNameStrategy = (0, exports.firstLinkNameStrategy)(true);
return NamedRepresentationFactory;
}());
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