@expressots/core
Version:
Expressots - modern, fast, lightweight nodejs web framework (@core)
69 lines (68 loc) • 2.77 kB
JavaScript
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.typeConstraint = exports.namedConstraint = exports.taggedConstraint = exports.traverseAncerstors = void 0;
const METADATA_KEY = __importStar(require("../constants/metadata_keys"));
const metadata_1 = require("../planning/metadata");
const traverseAncerstors = (request, constraint) => {
const parent = request.parentRequest;
if (parent !== null) {
return constraint(parent) ? true : traverseAncerstors(parent, constraint);
}
else {
return false;
}
};
exports.traverseAncerstors = traverseAncerstors;
// This helpers use currying to help you to generate constraints
const taggedConstraint = (key) => (value) => {
const constraint = (request) => request !== null &&
request.target !== null &&
request.target.matchesTag(key)(value);
constraint.metaData = new metadata_1.Metadata(key, value);
return constraint;
};
exports.taggedConstraint = taggedConstraint;
const namedConstraint = taggedConstraint(METADATA_KEY.NAMED_TAG);
exports.namedConstraint = namedConstraint;
const typeConstraint = (type) => (request) => {
// Using index 0 because constraints are applied
// to one binding at a time (see Planner class)
let binding = null;
if (request !== null) {
binding = request.bindings[0];
if (typeof type === "string") {
const serviceIdentifier = binding.serviceIdentifier;
return serviceIdentifier === type;
}
else {
const constructor = request.bindings[0]
.implementationType;
return type === constructor;
}
}
return false;
};
exports.typeConstraint = typeConstraint;