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Copyright (c) Microsoft Corporation.\n// Licensed under the MIT license.\n\nimport {\n HttpOperationMode,\n LongRunningOperation,\n LroResourceLocationConfig,\n LroResponse,\n RawResponse,\n ResponseBody,\n} from \"./models.js\";\nimport {\n LroError,\n OperationConfig,\n OperationStatus,\n RestorableOperationState,\n StateProxy,\n} from \"../poller/models.js\";\nimport { initOperation, pollOperation } from \"../poller/operation.js\";\nimport { AbortSignalLike } from \"@azure/abort-controller\";\nimport { logger } from \"../logger.js\";\n\nfunction getOperationLocationPollingUrl(inputs: {\n operationLocation?: string;\n azureAsyncOperation?: string;\n}): string | undefined {\n const { azureAsyncOperation, operationLocation } = inputs;\n return operationLocation ?? azureAsyncOperation;\n}\n\nfunction getLocationHeader(rawResponse: RawResponse): string | undefined {\n return rawResponse.headers[\"location\"];\n}\n\nfunction getOperationLocationHeader(rawResponse: RawResponse): string | undefined {\n return rawResponse.headers[\"operation-location\"];\n}\n\nfunction getAzureAsyncOperationHeader(rawResponse: RawResponse): string | undefined {\n return rawResponse.headers[\"azure-asyncoperation\"];\n}\n\nfunction findResourceLocation(inputs: {\n requestMethod?: string;\n location?: string;\n requestPath?: string;\n resourceLocationConfig?: LroResourceLocationConfig;\n}): string | undefined {\n const { location, requestMethod, requestPath, resourceLocationConfig } = inputs;\n switch (requestMethod) {\n case \"PUT\": {\n return requestPath;\n }\n case \"DELETE\": {\n return undefined;\n }\n case \"PATCH\": {\n return getDefault() ?? requestPath;\n }\n default: {\n return getDefault();\n }\n }\n\n function getDefault() {\n switch (resourceLocationConfig) {\n case \"azure-async-operation\": {\n return undefined;\n }\n case \"original-uri\": {\n return requestPath;\n }\n case \"location\":\n default: {\n return location;\n }\n }\n }\n}\n\nexport function inferLroMode(inputs: {\n rawResponse: RawResponse;\n requestPath?: string;\n requestMethod?: string;\n resourceLocationConfig?: LroResourceLocationConfig;\n}): (OperationConfig & { mode: HttpOperationMode }) | undefined {\n const { rawResponse, requestMethod, requestPath, resourceLocationConfig } = inputs;\n const operationLocation = getOperationLocationHeader(rawResponse);\n const azureAsyncOperation = getAzureAsyncOperationHeader(rawResponse);\n const pollingUrl = getOperationLocationPollingUrl({ operationLocation, azureAsyncOperation });\n const location = getLocationHeader(rawResponse);\n const normalizedRequestMethod = requestMethod?.toLocaleUpperCase();\n if (pollingUrl !== undefined) {\n return {\n mode: \"OperationLocation\",\n operationLocation: pollingUrl,\n resourceLocation: findResourceLocation({\n requestMethod: normalizedRequestMethod,\n location,\n requestPath,\n resourceLocationConfig,\n }),\n };\n } else if (location !== undefined) {\n return {\n mode: \"ResourceLocation\",\n operationLocation: location,\n };\n } else if (normalizedRequestMethod === \"PUT\" && requestPath) {\n return {\n mode: \"Body\",\n operationLocation: requestPath,\n };\n } else {\n return undefined;\n }\n}\n\nfunction transformStatus(inputs: { status: unknown; statusCode: number }): OperationStatus {\n const { status, statusCode } = inputs;\n if (typeof status !== \"string\" && status !== undefined) {\n throw new Error(\n `Polling was unsuccessful. Expected status to have a string value or no value but it has instead: ${status}. This doesn't necessarily indicate the operation has failed. Check your Azure subscription or resource status for more information.`,\n );\n }\n switch (status?.toLocaleLowerCase()) {\n case undefined:\n return toOperationStatus(statusCode);\n case \"succeeded\":\n return \"succeeded\";\n case \"failed\":\n return \"failed\";\n case \"running\":\n case \"accepted\":\n case \"started\":\n case \"canceling\":\n case \"cancelling\":\n return \"running\";\n case \"canceled\":\n case \"cancelled\":\n return \"canceled\";\n default: {\n logger.verbose(`LRO: unrecognized operation status: ${status}`);\n return status as OperationStatus;\n }\n }\n}\n\nfunction getStatus(rawResponse: RawResponse): OperationStatus {\n const { status } = (rawResponse.body as ResponseBody) ?? {};\n return transformStatus({ status, statusCode: rawResponse.statusCode });\n}\n\nfunction getProvisioningState(rawResponse: RawResponse): OperationStatus {\n const { properties, provisioningState } = (rawResponse.body as ResponseBody) ?? {};\n const status = properties?.provisioningState ?? provisioningState;\n return transformStatus({ status, statusCode: rawResponse.statusCode });\n}\n\nfunction toOperationStatus(statusCode: number): OperationStatus {\n if (statusCode === 202) {\n return \"running\";\n } else if (statusCode < 300) {\n return \"succeeded\";\n } else {\n return \"failed\";\n }\n}\n\nexport function parseRetryAfter({ rawResponse }: LroResponse): number | undefined {\n const retryAfter: string | undefined = rawResponse.headers[\"retry-after\"];\n if (retryAfter !== undefined) {\n // Retry-After header value is either in HTTP date format, or in seconds\n const retryAfterInSeconds = parseInt(retryAfter);\n return isNaN(retryAfterInSeconds)\n ? calculatePollingIntervalFromDate(new Date(retryAfter))\n : retryAfterInSeconds * 1000;\n }\n return undefined;\n}\n\nexport function getErrorFromResponse(response: LroResponse): LroError | undefined {\n const error = accessBodyProperty(response, \"error\");\n if (!error) {\n logger.warning(\n `The long-running operation failed but there is no error property in the response's body`,\n );\n return;\n }\n if (!error.code || !error.message) {\n logger.warning(\n `The long-running operation failed but the error property in the response's body doesn't contain code or message`,\n );\n return;\n }\n return error as LroError;\n}\n\nfunction calculatePollingIntervalFromDate(retryAfterDate: Date): number | undefined {\n const timeNow = Math.floor(new Date().getTime());\n const retryAfterTime = retryAfterDate.getTime();\n if (timeNow < retryAfterTime) {\n return retryAfterTime - timeNow;\n }\n return undefined;\n}\n\nexport function getStatusFromInitialResponse(inputs: {\n response: LroResponse;\n state: RestorableOperationState;\n operationLocation?: string;\n}): OperationStatus {\n const { response, state, operationLocation } = inputs;\n function helper(): OperationStatus {\n const mode = state.config.metadata?.[\"mode\"];\n switch (mode) {\n case undefined:\n return toOperationStatus(response.rawResponse.statusCode);\n case \"Body\":\n return getOperationStatus(response, state);\n default:\n return \"running\";\n }\n }\n const status = helper();\n return status === \"running\" && operationLocation === undefined ? \"succeeded\" : status;\n}\n\n/**\n * Initiates the long-running operation.\n */\nexport async function initHttpOperation(inputs: {\n stateProxy: StateProxy;\n resourceLocationConfig?: LroResourceLocationConfig;\n processResult?: (result: unknown, state: TState) => TResult;\n setErrorAsResult: boolean;\n lro: LongRunningOperation;\n}): Promise> {\n const { stateProxy, resourceLocationConfig, processResult, lro, setErrorAsResult } = inputs;\n return initOperation({\n init: async () => {\n const response = await lro.sendInitialRequest();\n const config = inferLroMode({\n rawResponse: response.rawResponse,\n requestPath: lro.requestPath,\n requestMethod: lro.requestMethod,\n resourceLocationConfig,\n });\n return {\n response,\n operationLocation: config?.operationLocation,\n resourceLocation: config?.resourceLocation,\n ...(config?.mode ? { metadata: { mode: config.mode } } : {}),\n };\n },\n stateProxy,\n processResult: processResult\n ? ({ flatResponse }, state) => processResult(flatResponse, state)\n : ({ flatResponse }) => flatResponse as TResult,\n getOperationStatus: getStatusFromInitialResponse,\n setErrorAsResult,\n });\n}\n\nexport function getOperationLocation(\n { rawResponse }: LroResponse,\n state: RestorableOperationState,\n): string | undefined {\n const mode = state.config.metadata?.[\"mode\"];\n switch (mode) {\n case \"OperationLocation\": {\n return getOperationLocationPollingUrl({\n operationLocation: getOperationLocationHeader(rawResponse),\n azureAsyncOperation: getAzureAsyncOperationHeader(rawResponse),\n });\n }\n case \"ResourceLocation\": {\n return getLocationHeader(rawResponse);\n }\n case \"Body\":\n default: {\n return undefined;\n }\n }\n}\n\nexport function getOperationStatus(\n { rawResponse }: LroResponse,\n state: RestorableOperationState,\n): OperationStatus {\n const mode = state.config.metadata?.[\"mode\"];\n switch (mode) {\n case \"OperationLocation\": {\n return getStatus(rawResponse);\n }\n case \"ResourceLocation\": {\n return toOperationStatus(rawResponse.statusCode);\n }\n case \"Body\": {\n return getProvisioningState(rawResponse);\n }\n default:\n throw new Error(`Internal error: Unexpected operation mode: ${mode}`);\n }\n}\n\nfunction accessBodyProperty

(\n { flatResponse, rawResponse }: LroResponse,\n prop: P,\n): ResponseBody[P] {\n return (flatResponse as ResponseBody)?.[prop] ?? (rawResponse.body as ResponseBody)?.[prop];\n}\n\nexport function getResourceLocation(\n res: LroResponse,\n state: RestorableOperationState,\n): string | undefined {\n const loc = accessBodyProperty(res, \"resourceLocation\");\n if (loc && typeof loc === \"string\") {\n state.config.resourceLocation = loc;\n }\n return state.config.resourceLocation;\n}\n\nexport function isOperationError(e: Error): boolean {\n return e.name === \"RestError\";\n}\n\n/** Polls the long-running operation. */\nexport async function pollHttpOperation(inputs: {\n lro: LongRunningOperation;\n stateProxy: StateProxy;\n processResult?: (result: unknown, state: TState) => TResult;\n updateState?: (state: TState, lastResponse: LroResponse) => void;\n isDone?: (lastResponse: LroResponse, state: TState) => boolean;\n setDelay: (intervalInMs: number) => void;\n options?: { abortSignal?: AbortSignalLike };\n state: RestorableOperationState;\n setErrorAsResult: boolean;\n}): Promise {\n const {\n lro,\n stateProxy,\n options,\n processResult,\n updateState,\n setDelay,\n state,\n setErrorAsResult,\n } = inputs;\n return pollOperation({\n state,\n stateProxy,\n setDelay,\n processResult: processResult\n ? ({ flatResponse }, inputState) => processResult(flatResponse, inputState)\n : ({ flatResponse }) => flatResponse as TResult,\n getError: getErrorFromResponse,\n updateState,\n getPollingInterval: parseRetryAfter,\n getOperationLocation,\n getOperationStatus,\n isOperationError,\n getResourceLocation,\n options,\n /**\n * The expansion here is intentional because `lro` could be an object that\n * references an inner this, so we need to preserve a reference to it.\n */\n poll: async (location: string, inputOptions?: { abortSignal?: AbortSignalLike }) =>\n lro.sendPollRequest(location, inputOptions),\n setErrorAsResult,\n });\n}\n"]}