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All rights reserved.\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\n\nimport * as i18n from '../../../core/i18n/i18n.js';\nimport * as Extras from '../extras/extras.js';\nimport type * as Handlers from '../handlers/handlers.js';\nimport * as Helpers from '../helpers/helpers.js';\nimport type * as Types from '../types/types.js';\n\nimport {estimateCompressionRatioForScript, metricSavingsForWastedBytes} from './Common.js';\nimport {\n  InsightCategory,\n  InsightKeys,\n  type InsightModel,\n  type InsightSetContext,\n  type PartialInsightModel,\n} from './types.js';\n\nexport const UIStrings = {\n  /**\n   * @description Title of an insight that identifies multiple copies of the same JavaScript sources, and recommends removing the duplication.\n   */\n  title: 'Duplicated JavaScript',\n  /**\n   * @description Description of an insight that identifies multiple copies of the same JavaScript sources, and recommends removing the duplication.\n   */\n  description:\n      'Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.',\n  /** Label for a column in a data table; entries will be the locations of JavaScript or CSS code, e.g. the name of a Javascript package or module. */\n  columnSource: 'Source',\n  /** Label for a column in a data table; entries will be the number of wasted bytes due to duplication of a web resource. */\n  columnDuplicatedBytes: 'Duplicated bytes',\n} as const;\n\nconst str_ = i18n.i18n.registerUIStrings('models/trace/insights/DuplicatedJavaScript.ts', UIStrings);\nexport const i18nString = i18n.i18n.getLocalizedString.bind(undefined, str_);\n\nexport type DuplicatedJavaScriptInsightModel = InsightModel<typeof UIStrings, {\n  duplication: Extras.ScriptDuplication.ScriptDuplication,\n  duplicationGroupedByNodeModules: Extras.ScriptDuplication.ScriptDuplication,\n  scriptsWithDuplication: Handlers.ModelHandlers.Scripts.Script[],\n  scripts: Handlers.ModelHandlers.Scripts.Script[],\n  mainDocumentUrl: string,\n}>;\n\nfunction finalize(partialModel: PartialInsightModel<DuplicatedJavaScriptInsightModel>):\n    DuplicatedJavaScriptInsightModel {\n  const requests = partialModel.scriptsWithDuplication.map(script => script.request).filter(e => !!e);\n\n  return {\n    insightKey: InsightKeys.DUPLICATE_JAVASCRIPT,\n    strings: UIStrings,\n    title: i18nString(UIStrings.title),\n    description: i18nString(UIStrings.description),\n    category: InsightCategory.LCP,\n    state: Boolean(partialModel.duplication.values().next().value) ? 'fail' : 'pass',\n    relatedEvents: [...new Set(requests)],\n    ...partialModel,\n  };\n}\n\nexport function isDuplicatedJavaScript(model: InsightModel): model is DuplicatedJavaScriptInsightModel {\n  return model.insightKey === InsightKeys.DUPLICATE_JAVASCRIPT;\n}\n\nexport function generateInsight(\n    parsedTrace: Handlers.Types.ParsedTrace, context: InsightSetContext): DuplicatedJavaScriptInsightModel {\n  const scripts = parsedTrace.Scripts.scripts.filter(script => {\n    if (script.frame !== context.frameId) {\n      return false;\n    }\n\n    if (script.url?.startsWith('chrome-extension://')) {\n      return false;\n    }\n\n    return Helpers.Timing.timestampIsInBounds(context.bounds, script.ts);\n  });\n\n  const compressionRatios = new Map<string, number>();\n  for (const script of scripts) {\n    if (script.request) {\n      compressionRatios.set(script.request.args.data.requestId, estimateCompressionRatioForScript(script));\n    }\n  }\n\n  const {duplication, duplicationGroupedByNodeModules} =\n      Extras.ScriptDuplication.computeScriptDuplication({scripts}, compressionRatios);\n  const scriptsWithDuplication = [...duplication.values().flatMap(data => data.duplicates.map(d => d.script))];\n\n  const wastedBytesByRequestId = new Map<string, number>();\n  for (const {duplicates} of duplication.values()) {\n    for (let i = 1; i < duplicates.length; i++) {\n      const sourceData = duplicates[i];\n      if (!sourceData.script.request) {\n        continue;\n      }\n\n      const transferSize = sourceData.attributedSize;\n      const requestId = sourceData.script.request.args.data.requestId;\n      wastedBytesByRequestId.set(requestId, (wastedBytesByRequestId.get(requestId) || 0) + transferSize);\n    }\n  }\n\n  return finalize({\n    duplication,\n    duplicationGroupedByNodeModules,\n    scriptsWithDuplication: [...new Set(scriptsWithDuplication)],\n    scripts,\n    mainDocumentUrl: context.navigation?.args.data?.url ?? parsedTrace.Meta.mainFrameURL,\n    metricSavings: metricSavingsForWastedBytes(wastedBytesByRequestId, context),\n    wastedBytes: wastedBytesByRequestId.values().reduce((acc, cur) => acc + cur, 0),\n  });\n}\n\nexport function createOverlays(model: DuplicatedJavaScriptInsightModel): Types.Overlays.Overlay[] {\n  return model.scriptsWithDuplication.map(script => script.request).filter(e => !!e).map(request => {\n    return {\n      type: 'ENTRY_OUTLINE',\n      entry: request,\n      outlineReason: 'ERROR',\n    };\n  });\n}\n"]}