86 lines
1.9 KiB
JavaScript
86 lines
1.9 KiB
JavaScript
// Copyright IBM Corp. 2016,2019. All Rights Reserved.
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// Node module: loopback-datasource-juggler
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// This file is licensed under the MIT License.
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// License text available at https://opensource.org/licenses/MIT
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'use strict';
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const traverse = require('traverse');
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exports.ContextRecorder = ContextRecorder;
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exports.deepCloneToObject = deepCloneToObject;
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exports.aCtxForModel = aCtxForModel;
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function ContextRecorder(initialValue) {
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if (!(this instanceof ContextRecorder)) {
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return new ContextRecorder(initialValue);
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}
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this.records = initialValue;
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}
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ContextRecorder.prototype.recordAndNext = function(transformFm) {
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const self = this;
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return function(context, next) {
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if (typeof transformFm === 'function') {
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transformFm(context);
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}
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if (Array.isArray(context)) {
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context = context.map(ctx => {
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const ctxCopy = deepCloneToObject(ctx);
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ctxCopy.hookState.test = true;
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return ctxCopy;
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});
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} else {
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context = deepCloneToObject(context);
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context.hookState.test = true;
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}
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if (typeof self.records === 'string') {
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self.records = context;
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return next();
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}
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if (!Array.isArray(self.records)) {
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self.records = [self.records];
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}
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if (Array.isArray(context)) {
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self.records.push(...context);
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} else {
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self.records.push(context);
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}
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next();
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};
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};
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function deepCloneToObject(obj) {
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return traverse(obj).map(function(x) {
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if (x === undefined) {
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// RDBMSs return null
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return null;
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}
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if (x && x.toObject)
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return x.toObject(true);
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if (x && typeof x === 'function' && x.modelName)
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return '[ModelCtor ' + x.modelName + ']';
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});
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}
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function aCtxForModel(TestModel, ctx) {
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ctx.Model = TestModel;
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if (!ctx.hookState) {
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ctx.hookState = {};
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}
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if (!('test' in ctx.hookState)) {
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ctx.hookState.test = true;
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}
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if (!ctx.options) {
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ctx.options = {};
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}
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return deepCloneToObject(ctx);
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}
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