graphql-modules/cjs/di/decorators.js

Create reusable, maintainable, testable and extendable GraphQL modules

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Injectable = Injectable;
exports.Optional = Optional;
exports.Inject = Inject;
exports.ExecutionContext = ExecutionContext;
const providers_1 = require("./providers");
const metadata_1 = require("./metadata");
function ensureReflect() {
    if (!(Reflect && Reflect.getOwnMetadata)) {
        throw 'reflect-metadata shim is required when using class decorators';
    }
}
function Injectable(options) {
    return (target) => {
        var _a;
        ensureReflect();
        const params = (Reflect.getMetadata('design:paramtypes', target) || []).map((param) => ((0, providers_1.isType)(param) ? param : null));
        const existingMeta = (0, metadata_1.readInjectableMetadata)(target);
        const meta = {
            params: ((_a = existingMeta === null || existingMeta === void 0 ? void 0 : existingMeta.params) === null || _a === void 0 ? void 0 : _a.length) > 0 && params.length === 0
                ? existingMeta === null || existingMeta === void 0 ? void 0 : existingMeta.params
                : params.map((param, i) => {
                    var _a;
                    const existingParam = (_a = existingMeta === null || existingMeta === void 0 ? void 0 : existingMeta.params) === null || _a === void 0 ? void 0 : _a[i];
                    return {
                        type: (existingParam === null || existingParam === void 0 ? void 0 : existingParam.type) || param,
                        optional: typeof (existingParam === null || existingParam === void 0 ? void 0 : existingParam.optional) === 'boolean'
                            ? existingParam.optional
                            : false,
                    };
                }),
            options: {
                ...((existingMeta === null || existingMeta === void 0 ? void 0 : existingMeta.options) || {}),
                ...(options || {}),
            },
        };
        target[metadata_1.INJECTABLE] = meta;
        return target;
    };
}
function Optional() {
    return (target, _, index) => {
        ensureReflect();
        (0, metadata_1.ensureInjectableMetadata)(target);
        const meta = (0, metadata_1.readInjectableMetadata)(target);
        meta.params[index] = {
            ...meta.params[index],
            optional: true,
        };
    };
}
function Inject(type) {
    return (target, _, index) => {
        ensureReflect();
        (0, metadata_1.ensureInjectableMetadata)(target);
        const meta = (0, metadata_1.readInjectableMetadata)(target);
        meta.params[index] = {
            type,
            optional: false,
        };
    };
}
function ExecutionContext() {
    return (obj, propertyKey) => {
        ensureReflect();
        const target = obj.constructor;
        (0, metadata_1.ensureInjectableMetadata)(target);
        const meta = (0, metadata_1.readInjectableMetadata)(target);
        if (!meta.options) {
            meta.options = {};
        }
        if (!meta.options.executionContextIn) {
            meta.options.executionContextIn = [];
        }
        meta.options.executionContextIn.push(propertyKey);
    };
}