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Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT license.\n// See LICENSE in the project root for license information.\n\nimport fs from 'fs';\nimport { VSCODE_PID_ENV_VAR_NAME } from './constants';\n\nexport interface ISuppression {\n  file: string;\n  scopeId: string;\n  rule: string;\n}\n\nexport interface IBulkSuppressionsConfig {\n  serializedSuppressions: Set<string>;\n  jsonObject: IBulkSuppressionsJson;\n  newSerializedSuppressions: Set<string>;\n  newJsonObject: IBulkSuppressionsJson;\n}\n\nexport interface IBulkSuppressionsJson {\n  suppressions: ISuppression[];\n}\n\nconst IS_RUNNING_IN_VSCODE: boolean = process.env[VSCODE_PID_ENV_VAR_NAME] !== undefined;\nconst TEN_SECONDS_MS: number = 10 * 1000;\nconst SUPPRESSIONS_JSON_FILENAME: string = '.eslint-bulk-suppressions.json';\n\nfunction throwIfAnythingOtherThanNotExistError(e: NodeJS.ErrnoException): void | never {\n  if (e?.code !== 'ENOENT') {\n    // Throw an error if any other error than file not found\n    throw e;\n  }\n}\n\ninterface ICachedBulkSuppressionsConfig {\n  readTime: number;\n  suppressionsConfig: IBulkSuppressionsConfig;\n}\nconst suppressionsJsonByFolderPath: Map<string, ICachedBulkSuppressionsConfig> = new Map();\nexport function getSuppressionsConfigForEslintrcFolderPath(\n  eslintrcFolderPath: string\n): IBulkSuppressionsConfig {\n  const cachedSuppressionsConfig: ICachedBulkSuppressionsConfig | undefined =\n    suppressionsJsonByFolderPath.get(eslintrcFolderPath);\n\n  let shouldLoad: boolean;\n  let suppressionsConfig: IBulkSuppressionsConfig;\n  if (cachedSuppressionsConfig) {\n    shouldLoad = IS_RUNNING_IN_VSCODE && cachedSuppressionsConfig.readTime < Date.now() - TEN_SECONDS_MS;\n    suppressionsConfig = cachedSuppressionsConfig.suppressionsConfig;\n  } else {\n    shouldLoad = true;\n  }\n\n  if (shouldLoad) {\n    const suppressionsPath: string = `${eslintrcFolderPath}/${SUPPRESSIONS_JSON_FILENAME}`;\n    let rawJsonFile: string | undefined;\n    try {\n      rawJsonFile = fs.readFileSync(suppressionsPath).toString();\n    } catch (e) {\n      throwIfAnythingOtherThanNotExistError(e);\n    }\n\n    if (!rawJsonFile) {\n      suppressionsConfig = {\n        serializedSuppressions: new Set(),\n        jsonObject: { suppressions: [] },\n        newSerializedSuppressions: new Set(),\n        newJsonObject: { suppressions: [] }\n      };\n    } else {\n      const jsonObject: IBulkSuppressionsJson = JSON.parse(rawJsonFile);\n      validateSuppressionsJson(jsonObject);\n\n      const serializedSuppressions: Set<string> = new Set();\n      for (const suppression of jsonObject.suppressions) {\n        serializedSuppressions.add(serializeSuppression(suppression));\n      }\n\n      suppressionsConfig = {\n        serializedSuppressions,\n        jsonObject,\n        newSerializedSuppressions: new Set(),\n        newJsonObject: { suppressions: [] }\n      };\n    }\n\n    suppressionsJsonByFolderPath.set(eslintrcFolderPath, { readTime: Date.now(), suppressionsConfig });\n  }\n\n  return suppressionsConfig!;\n}\n\nexport function getAllBulkSuppressionsConfigsByEslintrcFolderPath(): [string, IBulkSuppressionsConfig][] {\n  const result: [string, IBulkSuppressionsConfig][] = [];\n  for (const [eslintrcFolderPath, { suppressionsConfig }] of suppressionsJsonByFolderPath) {\n    result.push([eslintrcFolderPath, suppressionsConfig]);\n  }\n\n  return result;\n}\n\nexport function writeSuppressionsJsonToFile(\n  eslintrcFolderPath: string,\n  suppressionsConfig: IBulkSuppressionsConfig\n): void {\n  suppressionsJsonByFolderPath.set(eslintrcFolderPath, { readTime: Date.now(), suppressionsConfig });\n  const suppressionsPath: string = `${eslintrcFolderPath}/${SUPPRESSIONS_JSON_FILENAME}`;\n  if (suppressionsConfig.jsonObject.suppressions.length === 0) {\n    deleteFile(suppressionsPath);\n  } else {\n    suppressionsConfig.jsonObject.suppressions.sort(compareSuppressions);\n    fs.writeFileSync(suppressionsPath, JSON.stringify(suppressionsConfig.jsonObject, undefined, 2));\n  }\n}\n\nexport function deleteBulkSuppressionsFileInEslintrcFolder(eslintrcFolderPath: string): void {\n  const suppressionsPath: string = `${eslintrcFolderPath}/${SUPPRESSIONS_JSON_FILENAME}`;\n  deleteFile(suppressionsPath);\n}\n\nfunction deleteFile(filePath: string): void {\n  try {\n    fs.unlinkSync(filePath);\n  } catch (e) {\n    throwIfAnythingOtherThanNotExistError(e);\n  }\n}\n\nexport function serializeSuppression({ file, scopeId, rule }: ISuppression): string {\n  return `${file}|${scopeId}|${rule}`;\n}\n\nfunction compareSuppressions(a: ISuppression, b: ISuppression): -1 | 0 | 1 {\n  if (a.file < b.file) {\n    return -1;\n  } else if (a.file > b.file) {\n    return 1;\n  } else if (a.scopeId < b.scopeId) {\n    return -1;\n  } else if (a.scopeId > b.scopeId) {\n    return 1;\n  } else if (a.rule < b.rule) {\n    return -1;\n  } else if (a.rule > b.rule) {\n    return 1;\n  } else {\n    return 0;\n  }\n}\n\nfunction validateSuppressionsJson(json: IBulkSuppressionsJson): json is IBulkSuppressionsJson {\n  if (typeof json !== 'object') {\n    throw new Error(`Invalid JSON object: ${JSON.stringify(json, null, 2)}`);\n  }\n\n  if (!json) {\n    throw new Error('JSON object is null.');\n  }\n\n  const EXPECTED_ROOT_PROPERTY_NAMES: Set<keyof IBulkSuppressionsJson> = new Set(['suppressions']);\n\n  for (const propertyName of Object.getOwnPropertyNames(json)) {\n    if (!EXPECTED_ROOT_PROPERTY_NAMES.has(propertyName as keyof IBulkSuppressionsJson)) {\n      throw new Error(`Unexpected property name: ${propertyName}`);\n    }\n  }\n\n  const { suppressions } = json;\n  if (!suppressions) {\n    throw new Error('Missing \"suppressions\" property.');\n  }\n\n  if (!Array.isArray(suppressions)) {\n    throw new Error('\"suppressions\" property is not an array.');\n  }\n\n  const EXPECTED_SUPPRESSION_PROPERTY_NAMES: Set<keyof ISuppression> = new Set(['file', 'scopeId', 'rule']);\n  for (const suppression of suppressions) {\n    if (typeof suppression !== 'object') {\n      throw new Error(`Invalid suppression: ${JSON.stringify(suppression, null, 2)}`);\n    }\n\n    if (!suppression) {\n      throw new Error(`Suppression is null: ${JSON.stringify(suppression, null, 2)}`);\n    }\n\n    for (const propertyName of Object.getOwnPropertyNames(suppression)) {\n      if (!EXPECTED_SUPPRESSION_PROPERTY_NAMES.has(propertyName as keyof ISuppression)) {\n        throw new Error(`Unexpected property name: ${propertyName}`);\n      }\n    }\n\n    for (const propertyName of EXPECTED_SUPPRESSION_PROPERTY_NAMES) {\n      if (!suppression.hasOwnProperty(propertyName)) {\n        throw new Error(\n          `Missing \"${propertyName}\" property in suppression: ${JSON.stringify(suppression, null, 2)}`\n        );\n      } else if (typeof suppression[propertyName] !== 'string') {\n        throw new Error(\n          `\"${propertyName}\" property in suppression is not a string: ${JSON.stringify(suppression, null, 2)}`\n        );\n      }\n    }\n  }\n\n  return true;\n}\n"]}