@expressots/core
Version:
Expressots - modern, fast, lightweight nodejs web framework (@core)
179 lines (178 loc) • 9.1 kB
JavaScript
;
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.getFunctionName = void 0;
exports.getDependencies = getDependencies;
exports.getBaseClassDependencyCount = getBaseClassDependencyCount;
const lazy_service_identifier_1 = require("../annotation/lazy_service_identifier");
const ERROR_MSGS = __importStar(require("../constants/error_msgs"));
const literal_types_1 = require("../constants/literal_types");
const METADATA_KEY = __importStar(require("../constants/metadata_keys"));
const serialization_1 = require("../utils/serialization");
Object.defineProperty(exports, "getFunctionName", { enumerable: true, get: function () { return serialization_1.getFunctionName; } });
const target_1 = require("./target");
function getDependencies(metadataReader, func) {
const constructorName = (0, serialization_1.getFunctionName)(func);
return getTargets(metadataReader, constructorName, func, false);
}
function getTargets(metadataReader, constructorName, func, isBaseClass) {
const metadata = metadataReader.getConstructorMetadata(func);
// TypeScript compiler generated annotations
const serviceIdentifiers = metadata.compilerGeneratedMetadata;
// All types resolved must be annotated with @injectable
if (serviceIdentifiers === undefined) {
const msg = `${ERROR_MSGS.MISSING_INJECTABLE_ANNOTATION} ${constructorName}.`;
throw new Error(msg);
}
// User generated annotations
const constructorArgsMetadata = metadata.userGeneratedMetadata;
const keys = Object.keys(constructorArgsMetadata);
const hasUserDeclaredUnknownInjections = func.length === 0 && keys.length > 0;
const hasOptionalParameters = keys.length > func.length;
const iterations = hasUserDeclaredUnknownInjections || hasOptionalParameters
? keys.length
: func.length;
// Target instances that represent constructor arguments to be injected
const constructorTargets = getConstructorArgsAsTargets(isBaseClass, constructorName, serviceIdentifiers, constructorArgsMetadata, iterations);
// Target instances that represent properties to be injected
const propertyTargets = getClassPropsAsTargets(metadataReader, func, constructorName);
const targets = [...constructorTargets, ...propertyTargets];
return targets;
}
function getConstructorArgsAsTarget(index, isBaseClass, constructorName, serviceIdentifiers, constructorArgsMetadata) {
// Create map from array of metadata for faster access to metadata
const targetMetadata = constructorArgsMetadata[index.toString()] || [];
const metadata = formatTargetMetadata(targetMetadata);
const isManaged = metadata.unmanaged !== true;
// Take types to be injected from user-generated metadata
// if not available use compiler-generated metadata
let serviceIdentifier = serviceIdentifiers[index];
const injectIdentifier = metadata.inject || metadata.multiInject;
serviceIdentifier = (injectIdentifier ? injectIdentifier : serviceIdentifier);
// we unwrap LazyServiceIdentifier wrappers to allow circular dependencies on symbols
if (serviceIdentifier instanceof lazy_service_identifier_1.LazyServiceIdentifier) {
serviceIdentifier = serviceIdentifier.unwrap();
}
// Types Object and Function are too ambiguous to be resolved
// user needs to generate metadata manually for those
if (isManaged) {
const isObject = serviceIdentifier === Object;
const isFunction = serviceIdentifier === Function;
const isUndefined = serviceIdentifier === undefined;
const isUnknownType = isObject || isFunction || isUndefined;
if (!isBaseClass && isUnknownType) {
const msg = `${ERROR_MSGS.MISSING_INJECT_ANNOTATION} argument ${index} in class ${constructorName}.`;
throw new Error(msg);
}
const target = new target_1.Target(literal_types_1.TargetTypeEnum.ConstructorArgument, metadata.targetName, serviceIdentifier);
target.metadata = targetMetadata;
return target;
}
return null;
}
function getConstructorArgsAsTargets(isBaseClass, constructorName, serviceIdentifiers, constructorArgsMetadata, iterations) {
const targets = [];
for (let i = 0; i < iterations; i++) {
const index = i;
const target = getConstructorArgsAsTarget(index, isBaseClass, constructorName, serviceIdentifiers, constructorArgsMetadata);
if (target !== null) {
targets.push(target);
}
}
return targets;
}
function _getServiceIdentifierForProperty(inject, multiInject, propertyName, className) {
const serviceIdentifier = inject || multiInject;
if (serviceIdentifier === undefined) {
const msg = `${ERROR_MSGS.MISSING_INJECTABLE_ANNOTATION} for property ${String(propertyName)} in class ${className}.`;
throw new Error(msg);
}
return serviceIdentifier;
}
function getClassPropsAsTargets(metadataReader, constructorFunc, constructorName) {
const classPropsMetadata = metadataReader.getPropertiesMetadata(constructorFunc);
let targets = [];
const symbolKeys = Object.getOwnPropertySymbols(classPropsMetadata);
const stringKeys = Object.keys(classPropsMetadata);
const keys = stringKeys.concat(symbolKeys);
for (const key of keys) {
// the metadata for the property being injected
const targetMetadata = classPropsMetadata[key];
// the metadata formatted for easier access
const metadata = formatTargetMetadata(targetMetadata);
const identifier = metadata.targetName || key;
// Take types to be injected from user-generated metadata
const serviceIdentifier = _getServiceIdentifierForProperty(metadata.inject, metadata.multiInject, key, constructorName);
// The property target
const target = new target_1.Target(literal_types_1.TargetTypeEnum.ClassProperty, identifier, serviceIdentifier);
target.metadata = targetMetadata;
targets.push(target);
}
// Check if base class has injected properties
const baseConstructor = Object.getPrototypeOf(constructorFunc.prototype).constructor;
if (baseConstructor !== Object) {
const baseTargets = getClassPropsAsTargets(metadataReader, baseConstructor, constructorName);
targets = [...targets, ...baseTargets];
}
return targets;
}
function getBaseClassDependencyCount(metadataReader, func) {
const baseConstructor = Object.getPrototypeOf(func.prototype).constructor;
if (baseConstructor !== Object) {
// get targets for base class
const baseConstructorName = (0, serialization_1.getFunctionName)(baseConstructor);
const targets = getTargets(metadataReader, baseConstructorName, baseConstructor, true);
// get unmanaged metadata
const metadata = targets.map((t) => t.metadata.filter((m) => m.key === METADATA_KEY.UNMANAGED_TAG));
// Compare the number of constructor arguments with the number of
// unmanaged dependencies unmanaged dependencies are not required
const unmanagedCount = [].concat.apply([], metadata).length;
const dependencyCount = targets.length - unmanagedCount;
if (dependencyCount > 0) {
return dependencyCount;
}
else {
return getBaseClassDependencyCount(metadataReader, baseConstructor);
}
}
else {
return 0;
}
}
// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
function formatTargetMetadata(targetMetadata) {
// Create map from array of metadata for faster access to metadata
const targetMetadataMap = {};
targetMetadata.forEach((m) => {
targetMetadataMap[m.key.toString()] = m.value;
});
// user generated metadata
return {
inject: targetMetadataMap[METADATA_KEY.INJECT_TAG],
multiInject: targetMetadataMap[METADATA_KEY.MULTI_INJECT_TAG],
targetName: targetMetadataMap[METADATA_KEY.NAME_TAG],
unmanaged: targetMetadataMap[METADATA_KEY.UNMANAGED_TAG],
};
}