@wocker/core/lib/core/InstanceWrapper.js

Core of the Wocker

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.InstanceWrapper = void 0;
const env_1 = require("../env");
class InstanceWrapper {
    constructor(module, provider) {
        this.module = module;
        this.provider = provider;
        const [token, type, instance] = this.normalizeProvider(provider);
        this._token = token;
        this._type = type;
        this._instance = instance;
    }
    normalizeProvider(provider) {
        if (provider && typeof provider === "object") {
            if ("provide" in provider && "useValue" in provider) {
                return [provider.provide, null, provider.useValue];
            }
            if ("provide" in provider && "useClass" in provider) {
                return [provider.provide, provider.useClass, null];
            }
        }
        return [
            Reflect.getMetadata(env_1.INJECT_TOKEN_METADATA, provider) || provider,
            provider,
            null
        ];
    }
    get type() {
        return this._type;
    }
    get token() {
        return this._token;
    }
    get instance() {
        if (!this._instance) {
            if (!this._type) {
                throw new Error("Type not defined");
            }
            const types = Reflect.getMetadata(env_1.PARAMTYPES_METADATA, this._type) || [];
            const selfTypes = Reflect.getMetadata(env_1.SELF_DECLARED_DEPS_METADATA, this._type) || [];
            if (selfTypes.length > 0) {
                selfTypes.forEach(({ index, token }) => {
                    types[index] = token;
                });
            }
            const params = types.map((type) => {
                return this.module.get(type);
            });
            this._instance = new this._type(...params);
        }
        return this._instance;
    }
    replace(provider) {
        const [token, type, instance] = this.normalizeProvider(provider);
        this._token = token;
        this._type = type;
        this._instance = instance;
    }
}
exports.InstanceWrapper = InstanceWrapper;