| 1 | 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* Copyright The OpenTelemetry Authors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * https://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/* eslint-disable @typescript-eslint/no-explicit-any */\n\nimport { isPlainObject } from './lodash.merge';\n\nconst MAX_LEVEL = 20;\n\ninterface ObjectInto {\n obj: any;\n key: string;\n}\n\n/**\n * Merges objects together\n * @param args - objects / values to be merged\n */\nexport function merge(...args: any[]): any {\n let result: any = args.shift();\n const objects: WeakMap<any, ObjectInto[]> | undefined = new WeakMap<\n any,\n ObjectInto[]\n >();\n while (args.length > 0) {\n result = mergeTwoObjects(result, args.shift(), 0, objects);\n }\n\n return result;\n}\n\nfunction takeValue(value: any): any {\n if (isArray(value)) {\n return value.slice();\n }\n return value;\n}\n\n/**\n * Merges two objects\n * @param one - first object\n * @param two - second object\n * @param level - current deep level\n * @param objects - objects holder that has been already referenced - to prevent\n * cyclic dependency\n */\nfunction mergeTwoObjects(\n one: any,\n two: any,\n level = 0,\n objects: WeakMap<any, ObjectInto[]>\n): any {\n let result: any;\n if (level > MAX_LEVEL) {\n return undefined;\n }\n level++;\n if (isPrimitive(one) || isPrimitive(two) || isFunction(two)) {\n result = takeValue(two);\n } else if (isArray(one)) {\n result = one.slice();\n if (isArray(two)) {\n for (let i = 0, j = two.length; i < j; i++) {\n result.push(takeValue(two[i]));\n }\n } else if (isObject(two)) {\n const keys = Object.keys(two);\n for (let i = 0, j = keys.length; i < j; i++) {\n const key = keys[i];\n result[key] = takeValue(two[key]);\n }\n }\n } else if (isObject(one)) {\n if (isObject(two)) {\n if (!shouldMerge(one, two)) {\n return two;\n }\n result = Object.assign({}, one);\n const keys = Object.keys(two);\n\n for (let i = 0, j = keys.length; i < j; i++) {\n const key = keys[i];\n const twoValue = two[key];\n\n if (isPrimitive(twoValue)) {\n if (typeof twoValue === 'undefined') {\n delete result[key];\n } else {\n // result[key] = takeValue(twoValue);\n result[key] = twoValue;\n }\n } else {\n const obj1 = result[key];\n const obj2 = twoValue;\n\n if (\n wasObjectReferenced(one, key, objects) ||\n wasObjectReferenced(two, key, objects)\n ) {\n delete result[key];\n } else {\n if (isObject(obj1) && isObject(obj2)) {\n const arr1 = objects.get(obj1) || [];\n const arr2 = objects.get(obj2) || [];\n arr1.push({ obj: one, key });\n arr2.push({ obj: two, key });\n objects.set(obj1, arr1);\n objects.set(obj2, arr2);\n }\n\n result[key] = mergeTwoObjects(\n result[key],\n twoValue,\n level,\n objects\n );\n }\n }\n }\n } else {\n result = two;\n }\n }\n\n return result;\n}\n\n/**\n * Function to check if object has been already reference\n * @param obj\n * @param key\n * @param objects\n */\nfunction wasObjectReferenced(\n obj: any,\n key: string,\n objects: WeakMap<any, ObjectInto[]>\n): boolean {\n const arr = objects.get(obj[key]) || [];\n for (let i = 0, j = arr.length; i < j; i++) {\n const info = arr[i];\n if (info.key === key && info.obj === obj) {\n return true;\n }\n }\n return false;\n}\n\nfunction isArray(value: any): boolean {\n return Array.isArray(value);\n}\n\nfunction isFunction(value: any): boolean {\n return typeof value === 'function';\n}\n\nfunction isObject(value: any): boolean {\n return (\n !isPrimitive(value) &&\n !isArray(value) &&\n !isFunction(value) &&\n typeof value === 'object'\n );\n}\n\nfunction isPrimitive(value: any): boolean {\n return (\n typeof value === 'string' ||\n typeof value === 'number' ||\n typeof value === 'boolean' ||\n typeof value === 'undefined' ||\n value instanceof Date ||\n value instanceof RegExp ||\n value === null\n );\n}\n\nfunction shouldMerge(one: any, two: any): boolean {\n if (!isPlainObject(one) || !isPlainObject(two)) {\n return false;\n }\n\n return true;\n}\n"]} |