@langchain/core/dist/messages/block_translators/bedrock_converse.cjs.map

Core LangChain.js abstractions and schemas

{"version":3,"file":"bedrock_converse.cjs","names":["_isObject","_isString","_isBytesArray","_isArray","_isContentBlock","iife","_isNumber"],"sources":["../../../src/messages/block_translators/bedrock_converse.ts"],"sourcesContent":["import { AIMessage } from \"../ai.js\";\nimport { ContentBlock } from \"../content/index.js\";\nimport { KNOWN_BLOCK_TYPES } from \"../content/tools.js\";\nimport type { StandardContentBlockTranslator } from \"./index.js\";\nimport {\n  _isArray,\n  _isBytesArray,\n  _isContentBlock,\n  _isNumber,\n  _isObject,\n  _isString,\n  iife,\n} from \"./utils.js\";\n\n// see `/libs/providers/langchain-aws/src/utils/compat.ts:convertFileFormatToMimeType`\nfunction convertFileFormatToMimeType(format: string): string {\n  switch (format) {\n    // DocumentBlock\n    case \"csv\":\n      return \"text/csv\";\n    case \"doc\":\n      return \"application/vnd.openxmlformats-officedocument.wordprocessingml.document\";\n    case \"docx\":\n      return \"application/vnd.openxmlformats-officedocument.wordprocessingml.document\";\n    case \"html\":\n      return \"text/html\";\n    case \"md\":\n      return \"text/markdown\";\n    case \"pdf\":\n      return \"application/pdf\";\n    case \"txt\":\n      return \"text/plain\";\n    case \"xls\":\n      return \"application/vnd.ms-excel\";\n    case \"xlsx\":\n      return \"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet\";\n    // ImageBlock\n    case \"gif\":\n      return \"image/gif\";\n    case \"jpeg\":\n      return \"image/jpeg\";\n    case \"jpg\":\n      return \"image/jpeg\";\n    case \"png\":\n      return \"image/png\";\n    case \"webp\":\n      return \"image/webp\";\n    // VideoBlock\n    case \"flv\":\n      return \"video/flv\";\n    case \"mkv\":\n      return \"video/mkv\";\n    case \"mov\":\n      return \"video/mov\";\n    case \"mp4\":\n      return \"video/mp4\";\n    case \"mpeg\":\n      return \"video/mpeg\";\n    case \"mpg\":\n      return \"video/mpg\";\n    case \"three_gp\":\n      return \"video/three_gp\";\n    case \"webm\":\n      return \"video/webm\";\n    case \"wmv\":\n      return \"video/wmv\";\n    default:\n      return \"application/octet-stream\";\n  }\n}\n\nfunction convertConverseDocumentBlock(\n  block: ContentBlock\n): ContentBlock.Standard {\n  if (_isObject(block.document) && _isObject(block.document.source)) {\n    const format =\n      _isObject(block.document) && _isString(block.document.format)\n        ? block.document.format\n        : \"\";\n    const mimeType = convertFileFormatToMimeType(format);\n\n    if (_isObject(block.document.source)) {\n      if (\n        _isObject(block.document.source.s3Location) &&\n        _isString(block.document.source.s3Location.uri)\n      ) {\n        return {\n          type: \"file\",\n          mimeType,\n          fileId: block.document.source.s3Location.uri,\n        };\n      }\n      if (_isBytesArray(block.document.source.bytes)) {\n        return {\n          type: \"file\",\n          mimeType,\n          data: block.document.source.bytes,\n        };\n      }\n      if (_isString(block.document.source.text)) {\n        return {\n          type: \"file\",\n          mimeType,\n          data: Buffer.from(block.document.source.text).toString(\"base64\"),\n        };\n      }\n      if (_isArray(block.document.source.content)) {\n        const data = block.document.source.content.reduce(\n          (acc: string, item) => {\n            if (_isObject(item) && _isString(item.text)) {\n              return acc + item.text;\n            }\n            return acc;\n          },\n          \"\"\n        );\n        return {\n          type: \"file\",\n          mimeType,\n          data,\n        };\n      }\n    }\n  }\n  return { type: \"non_standard\", value: block };\n}\n\nfunction convertConverseImageBlock(block: ContentBlock): ContentBlock.Standard {\n  if (_isContentBlock(block, \"image\") && _isObject(block.image)) {\n    const format =\n      _isObject(block.image) && _isString(block.image.format)\n        ? block.image.format\n        : \"\";\n    const mimeType = convertFileFormatToMimeType(format);\n\n    if (_isObject(block.image.source)) {\n      if (\n        _isObject(block.image.source.s3Location) &&\n        _isString(block.image.source.s3Location.uri)\n      ) {\n        return {\n          type: \"image\",\n          mimeType,\n          fileId: block.image.source.s3Location.uri,\n        };\n      }\n      if (_isBytesArray(block.image.source.bytes)) {\n        return {\n          type: \"image\",\n          mimeType,\n          data: block.image.source.bytes,\n        };\n      }\n    }\n  }\n  return { type: \"non_standard\", value: block };\n}\n\nfunction convertConverseVideoBlock(block: ContentBlock): ContentBlock.Standard {\n  if (_isContentBlock(block, \"video\") && _isObject(block.video)) {\n    const format =\n      _isObject(block.video) && _isString(block.video.format)\n        ? block.video.format\n        : \"\";\n    const mimeType = convertFileFormatToMimeType(format);\n\n    if (_isObject(block.video.source)) {\n      if (\n        _isObject(block.video.source.s3Location) &&\n        _isString(block.video.source.s3Location.uri)\n      ) {\n        return {\n          type: \"video\",\n          mimeType,\n          fileId: block.video.source.s3Location.uri,\n        };\n      }\n      if (_isBytesArray(block.video.source.bytes)) {\n        return {\n          type: \"video\",\n          mimeType,\n          data: block.video.source.bytes,\n        };\n      }\n    }\n  }\n  return { type: \"non_standard\", value: block };\n}\n\nexport function convertToV1FromChatBedrockConverseInput(\n  message: AIMessage\n): Array<ContentBlock.Standard> {\n  function* iterateContent(): Iterable<ContentBlock.Standard> {\n    const content =\n      typeof message.content === \"string\"\n        ? [{ type: \"text\", text: message.content }]\n        : message.content;\n    const blocks = content.map((block) => {\n      if (_isContentBlock(block, \"non_standard\") && \"value\" in block) {\n        return block.value as ContentBlock;\n      }\n      return block;\n    });\n    for (const block of blocks) {\n      if (_isContentBlock(block, \"text\") && _isString(block.text)) {\n        yield { type: \"text\", text: block.text };\n        continue;\n      } else if (\n        _isContentBlock(block, \"document\") &&\n        _isObject(block.document)\n      ) {\n        yield convertConverseDocumentBlock(block);\n        continue;\n      } else if (_isContentBlock(block, \"image\") && _isObject(block.image)) {\n        yield convertConverseImageBlock(block);\n        continue;\n      } else if (_isContentBlock(block, \"video\") && _isObject(block.video)) {\n        yield convertConverseVideoBlock(block);\n        continue;\n      }\n      if (KNOWN_BLOCK_TYPES.includes(block.type)) {\n        yield block as ContentBlock.Standard;\n      } else {\n        yield { type: \"non_standard\", value: block };\n      }\n    }\n  }\n  return Array.from(iterateContent());\n}\n\nfunction convertToV1FromChatBedrockConverseMessage(\n  message: AIMessage\n): Array<ContentBlock.Standard> {\n  // see `/libs/providers/langchain-aws/src/utils/message_outputs.ts:convertConverseMessageToLangChainMessage`\n  function* iterateContent(): Iterable<ContentBlock.Standard> {\n    const content =\n      typeof message.content === \"string\"\n        ? [{ type: \"text\", text: message.content }]\n        : message.content;\n    for (const block of content) {\n      if (_isContentBlock(block, \"cache_point\")) {\n        yield { type: \"non_standard\", value: block };\n        continue;\n      } else if (\n        _isContentBlock(block, \"citations_content\") &&\n        _isObject(block.citationsContent)\n      ) {\n        const text = _isArray(block.citationsContent.content)\n          ? block.citationsContent.content.reduce((acc: string, item) => {\n              if (_isObject(item) && _isString(item.text)) {\n                return acc + item.text;\n              }\n              return acc;\n            }, \"\")\n          : \"\";\n        const annotations = _isArray(block.citationsContent.citations)\n          ? block.citationsContent.citations.reduce(\n              (acc: Array<ContentBlock.Citation>, item) => {\n                if (_isObject(item)) {\n                  const citedText = _isArray(item.sourceContent)\n                    ? item.sourceContent.reduce((acc: string, item) => {\n                        if (_isObject(item) && _isString(item.text)) {\n                          return acc + item.text;\n                        }\n                        return acc;\n                      }, \"\")\n                    : \"\";\n                  const properties = iife(() => {\n                    if (_isObject(item.location)) {\n                      const location =\n                        item.location.documentChar ||\n                        item.location.documentPage ||\n                        item.location.documentChunk;\n                      if (_isObject(location)) {\n                        return {\n                          source: _isNumber(location.documentIndex)\n                            ? location.documentIndex.toString()\n                            : undefined,\n                          startIndex: _isNumber(location.start)\n                            ? location.start\n                            : undefined,\n                          endIndex: _isNumber(location.end)\n                            ? location.end\n                            : undefined,\n                        };\n                      }\n                    }\n                    return {};\n                  });\n                  acc.push({ type: \"citation\", citedText, ...properties });\n                }\n                return acc;\n              },\n              []\n            )\n          : [];\n        yield { type: \"text\", text, annotations };\n        continue;\n      } else if (\n        _isContentBlock(block, \"document\") &&\n        _isObject(block.document)\n      ) {\n        yield convertConverseDocumentBlock(block);\n        continue;\n      } else if (_isContentBlock(block, \"guard_content\")) {\n        yield {\n          type: \"non_standard\",\n          value: block,\n        };\n        continue;\n      } else if (_isContentBlock(block, \"image\") && _isObject(block.image)) {\n        yield convertConverseImageBlock(block);\n        continue;\n      } else if (\n        _isContentBlock(block, \"reasoning_content\") &&\n        _isString(block.reasoningText)\n      ) {\n        yield {\n          type: \"reasoning\",\n          reasoning: block.reasoningText,\n        };\n        continue;\n      } else if (_isContentBlock(block, \"text\") && _isString(block.text)) {\n        yield { type: \"text\", text: block.text };\n        continue;\n      } else if (_isContentBlock(block, \"tool_result\")) {\n        yield { type: \"non_standard\", value: block };\n        continue;\n      } else if (_isContentBlock(block, \"tool_call\")) {\n        // no-op - filtered to tools\n        continue;\n      } else if (_isContentBlock(block, \"video\") && _isObject(block.video)) {\n        yield convertConverseVideoBlock(block);\n        continue;\n      }\n      yield { type: \"non_standard\", value: block };\n    }\n  }\n  return Array.from(iterateContent());\n}\n\nexport const ChatBedrockConverseTranslator: StandardContentBlockTranslator = {\n  translateContent: convertToV1FromChatBedrockConverseMessage,\n  translateContentChunk: 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