| 1 |
- {"ast":null,"code":"import _asyncToGenerator from \"F:/workspace/202226701027/huinongbao-app/node_modules/@babel/runtime/helpers/esm/asyncToGenerator.js\";\nimport { RunnableLambda } from \"../runnables/base.js\";\nimport { AIMessage, AIMessageChunk } from \"./ai.js\";\nimport { ChatMessage, ChatMessageChunk } from \"./chat.js\";\nimport { FunctionMessage, FunctionMessageChunk } from \"./function.js\";\nimport { HumanMessage, HumanMessageChunk } from \"./human.js\";\nimport { RemoveMessage } from \"./modifier.js\";\nimport { SystemMessage, SystemMessageChunk } from \"./system.js\";\nimport { ToolMessage, ToolMessageChunk } from \"./tool.js\";\nimport { convertToChunk } from \"./utils.js\";\nconst _isMessageType = (msg, types) => {\n const typesAsStrings = [...new Set(types === null || types === void 0 ? void 0 : types.map(t => {\n if (typeof t === \"string\") {\n return t;\n }\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n const instantiatedMsgClass = new t({});\n if (!(\"_getType\" in instantiatedMsgClass) || typeof instantiatedMsgClass._getType !== \"function\") {\n throw new Error(\"Invalid type provided.\");\n }\n return instantiatedMsgClass._getType();\n }))];\n const msgType = msg._getType();\n return typesAsStrings.some(t => t === msgType);\n};\nexport function filterMessages(messagesOrOptions, options) {\n if (Array.isArray(messagesOrOptions)) {\n return _filterMessages(messagesOrOptions, options);\n }\n return RunnableLambda.from(input => {\n return _filterMessages(input, messagesOrOptions);\n });\n}\nfunction _filterMessages(messages, options = {}) {\n const {\n includeNames,\n excludeNames,\n includeTypes,\n excludeTypes,\n includeIds,\n excludeIds\n } = options;\n const filtered = [];\n for (const msg of messages) {\n if (excludeNames && msg.name && excludeNames.includes(msg.name)) {\n continue;\n } else if (excludeTypes && _isMessageType(msg, excludeTypes)) {\n continue;\n } else if (excludeIds && msg.id && excludeIds.includes(msg.id)) {\n continue;\n }\n // default to inclusion when no inclusion criteria given.\n if (!(includeTypes || includeIds || includeNames)) {\n filtered.push(msg);\n } else if (includeNames && msg.name && includeNames.some(iName => iName === msg.name)) {\n filtered.push(msg);\n } else if (includeTypes && _isMessageType(msg, includeTypes)) {\n filtered.push(msg);\n } else if (includeIds && msg.id && includeIds.some(id => id === msg.id)) {\n filtered.push(msg);\n }\n }\n return filtered;\n}\nexport function mergeMessageRuns(messages) {\n if (Array.isArray(messages)) {\n return _mergeMessageRuns(messages);\n }\n return RunnableLambda.from(_mergeMessageRuns);\n}\nfunction _mergeMessageRuns(messages) {\n if (!messages.length) {\n return [];\n }\n const merged = [];\n for (const msg of messages) {\n const curr = msg; // Create a shallow copy of the message\n const last = merged.pop();\n if (!last) {\n merged.push(curr);\n } else if (curr._getType() === \"tool\" || !(curr._getType() === last._getType())) {\n merged.push(last, curr);\n } else {\n const lastChunk = convertToChunk(last);\n const currChunk = convertToChunk(curr);\n const mergedChunks = lastChunk.concat(currChunk);\n if (typeof lastChunk.content === \"string\" && typeof currChunk.content === \"string\") {\n mergedChunks.content = `${lastChunk.content}\\n${currChunk.content}`;\n }\n merged.push(_chunkToMsg(mergedChunks));\n }\n }\n return merged;\n}\nexport function trimMessages(messagesOrOptions, options) {\n if (Array.isArray(messagesOrOptions)) {\n const messages = messagesOrOptions;\n if (!options) {\n throw new Error(\"Options parameter is required when providing messages.\");\n }\n return _trimMessagesHelper(messages, options);\n } else {\n const trimmerOptions = messagesOrOptions;\n return RunnableLambda.from(input => _trimMessagesHelper(input, trimmerOptions));\n }\n}\nfunction _trimMessagesHelper(_x, _x2) {\n return _trimMessagesHelper2.apply(this, arguments);\n}\nfunction _trimMessagesHelper2() {\n _trimMessagesHelper2 = _asyncToGenerator(function* (messages, options) {\n const {\n maxTokens,\n tokenCounter,\n strategy = \"last\",\n allowPartial = false,\n endOn,\n startOn,\n includeSystem = false,\n textSplitter\n } = options;\n if (startOn && strategy === \"first\") {\n throw new Error(\"`startOn` should only be specified if `strategy` is 'last'.\");\n }\n if (includeSystem && strategy === \"first\") {\n throw new Error(\"`includeSystem` should only be specified if `strategy` is 'last'.\");\n }\n let listTokenCounter;\n if (\"getNumTokens\" in tokenCounter) {\n listTokenCounter = /*#__PURE__*/function () {\n var _ref = _asyncToGenerator(function* (msgs) {\n const tokenCounts = yield Promise.all(msgs.map(msg => tokenCounter.getNumTokens(msg.content)));\n return tokenCounts.reduce((sum, count) => sum + count, 0);\n });\n return function listTokenCounter(_x7) {\n return _ref.apply(this, arguments);\n };\n }();\n } else {\n listTokenCounter = /*#__PURE__*/function () {\n var _ref2 = _asyncToGenerator(function* (msgs) {\n return tokenCounter(msgs);\n });\n return function listTokenCounter(_x8) {\n return _ref2.apply(this, arguments);\n };\n }();\n }\n let textSplitterFunc = defaultTextSplitter;\n if (textSplitter) {\n if (\"splitText\" in textSplitter) {\n textSplitterFunc = textSplitter.splitText;\n } else {\n textSplitterFunc = /*#__PURE__*/function () {\n var _ref3 = _asyncToGenerator(function* (text) {\n return textSplitter(text);\n });\n return function textSplitterFunc(_x9) {\n return _ref3.apply(this, arguments);\n };\n }();\n }\n }\n if (strategy === \"first\") {\n return _firstMaxTokens(messages, {\n maxTokens,\n tokenCounter: listTokenCounter,\n textSplitter: textSplitterFunc,\n partialStrategy: allowPartial ? \"first\" : undefined,\n endOn\n });\n } else if (strategy === \"last\") {\n return _lastMaxTokens(messages, {\n maxTokens,\n tokenCounter: listTokenCounter,\n textSplitter: textSplitterFunc,\n allowPartial,\n includeSystem,\n startOn,\n endOn\n });\n } else {\n throw new Error(`Unrecognized strategy: '${strategy}'. Must be one of 'first' or 'last'.`);\n }\n });\n return _trimMessagesHelper2.apply(this, arguments);\n}\nfunction _firstMaxTokens(_x3, _x4) {\n return _firstMaxTokens2.apply(this, arguments);\n}\nfunction _firstMaxTokens2() {\n _firstMaxTokens2 = _asyncToGenerator(function* (messages, options) {\n const {\n maxTokens,\n tokenCounter,\n textSplitter,\n partialStrategy,\n endOn\n } = options;\n let messagesCopy = [...messages];\n let idx = 0;\n for (let i = 0; i < messagesCopy.length; i += 1) {\n const remainingMessages = i > 0 ? messagesCopy.slice(0, -i) : messagesCopy;\n if ((yield tokenCounter(remainingMessages)) <= maxTokens) {\n idx = messagesCopy.length - i;\n break;\n }\n }\n if (idx < messagesCopy.length - 1 && partialStrategy) {\n let includedPartial = false;\n if (Array.isArray(messagesCopy[idx].content)) {\n const excluded = messagesCopy[idx];\n if (typeof excluded.content === \"string\") {\n throw new Error(\"Expected content to be an array.\");\n }\n const numBlock = excluded.content.length;\n const reversedContent = partialStrategy === \"last\" ? [...excluded.content].reverse() : excluded.content;\n for (let i = 1; i <= numBlock; i += 1) {\n const partialContent = partialStrategy === \"first\" ? reversedContent.slice(0, i) : reversedContent.slice(-i);\n const fields = Object.fromEntries(Object.entries(excluded).filter(([k]) => k !== \"type\" && !k.startsWith(\"lc_\")));\n const updatedMessage = _switchTypeToMessage(excluded._getType(), {\n ...fields,\n content: partialContent\n });\n const slicedMessages = [...messagesCopy.slice(0, idx), updatedMessage];\n if ((yield tokenCounter(slicedMessages)) <= maxTokens) {\n messagesCopy = slicedMessages;\n idx += 1;\n includedPartial = true;\n } else {\n break;\n }\n }\n if (includedPartial && partialStrategy === \"last\") {\n excluded.content = [...reversedContent].reverse();\n }\n }\n if (!includedPartial) {\n const excluded = messagesCopy[idx];\n let text;\n if (Array.isArray(excluded.content) && excluded.content.some(block => typeof block === \"string\" || block.type === \"text\")) {\n const textBlock = excluded.content.find(block => block.type === \"text\" && block.text);\n text = textBlock === null || textBlock === void 0 ? void 0 : textBlock.text;\n } else if (typeof excluded.content === \"string\") {\n text = excluded.content;\n }\n if (text) {\n const splitTexts = yield textSplitter(text);\n const numSplits = splitTexts.length;\n if (partialStrategy === \"last\") {\n splitTexts.reverse();\n }\n for (let _ = 0; _ < numSplits - 1; _ += 1) {\n splitTexts.pop();\n excluded.content = splitTexts.join(\"\");\n if ((yield tokenCounter([...messagesCopy.slice(0, idx), excluded])) <= maxTokens) {\n if (partialStrategy === \"last\") {\n excluded.content = [...splitTexts].reverse().join(\"\");\n }\n messagesCopy = [...messagesCopy.slice(0, idx), excluded];\n idx += 1;\n break;\n }\n }\n }\n }\n }\n if (endOn) {\n const endOnArr = Array.isArray(endOn) ? endOn : [endOn];\n while (idx > 0 && !_isMessageType(messagesCopy[idx - 1], endOnArr)) {\n idx -= 1;\n }\n }\n return messagesCopy.slice(0, idx);\n });\n return _firstMaxTokens2.apply(this, arguments);\n}\nfunction _lastMaxTokens(_x5, _x6) {\n return _lastMaxTokens2.apply(this, arguments);\n}\nfunction _lastMaxTokens2() {\n _lastMaxTokens2 = _asyncToGenerator(function* (messages, options) {\n const {\n allowPartial = false,\n includeSystem = false,\n endOn,\n startOn,\n ...rest\n } = options;\n if (endOn) {\n const endOnArr = Array.isArray(endOn) ? endOn : [endOn];\n while (messages && !_isMessageType(messages[messages.length - 1], endOnArr)) {\n messages.pop();\n }\n }\n const swappedSystem = includeSystem && messages[0]._getType() === \"system\";\n let reversed_ = swappedSystem ? messages.slice(0, 1).concat(messages.slice(1).reverse()) : messages.reverse();\n reversed_ = yield _firstMaxTokens(reversed_, {\n ...rest,\n partialStrategy: allowPartial ? \"last\" : undefined,\n endOn: startOn\n });\n if (swappedSystem) {\n return [reversed_[0], ...reversed_.slice(1).reverse()];\n } else {\n return reversed_.reverse();\n }\n });\n return _lastMaxTokens2.apply(this, arguments);\n}\nconst _MSG_CHUNK_MAP = {\n human: {\n message: HumanMessage,\n messageChunk: HumanMessageChunk\n },\n ai: {\n message: AIMessage,\n messageChunk: AIMessageChunk\n },\n system: {\n message: SystemMessage,\n messageChunk: SystemMessageChunk\n },\n tool: {\n message: ToolMessage,\n messageChunk: ToolMessageChunk\n },\n function: {\n message: FunctionMessage,\n messageChunk: FunctionMessageChunk\n },\n generic: {\n message: ChatMessage,\n messageChunk: ChatMessageChunk\n },\n remove: {\n message: RemoveMessage,\n messageChunk: RemoveMessage // RemoveMessage does not have a chunk class.\n }\n};\nfunction _switchTypeToMessage(messageType, fields, returnChunk) {\n let chunk;\n let msg;\n switch (messageType) {\n case \"human\":\n if (returnChunk) {\n chunk = new HumanMessageChunk(fields);\n } else {\n msg = new HumanMessage(fields);\n }\n break;\n case \"ai\":\n if (returnChunk) {\n let aiChunkFields = {\n ...fields\n };\n if (\"tool_calls\" in aiChunkFields) {\n var _aiChunkFields$tool_c;\n aiChunkFields = {\n ...aiChunkFields,\n tool_call_chunks: (_aiChunkFields$tool_c = aiChunkFields.tool_calls) === null || _aiChunkFields$tool_c === void 0 ? void 0 : _aiChunkFields$tool_c.map(tc => ({\n ...tc,\n type: \"tool_call_chunk\",\n index: undefined,\n args: JSON.stringify(tc.args)\n }))\n };\n }\n chunk = new AIMessageChunk(aiChunkFields);\n } else {\n msg = new AIMessage(fields);\n }\n break;\n case \"system\":\n if (returnChunk) {\n chunk = new SystemMessageChunk(fields);\n } else {\n msg = new SystemMessage(fields);\n }\n break;\n case \"tool\":\n if (\"tool_call_id\" in fields) {\n if (returnChunk) {\n chunk = new ToolMessageChunk(fields);\n } else {\n msg = new ToolMessage(fields);\n }\n } else {\n throw new Error(\"Can not convert ToolMessage to ToolMessageChunk if 'tool_call_id' field is not defined.\");\n }\n break;\n case \"function\":\n if (returnChunk) {\n chunk = new FunctionMessageChunk(fields);\n } else {\n if (!fields.name) {\n throw new Error(\"FunctionMessage must have a 'name' field\");\n }\n msg = new FunctionMessage(fields);\n }\n break;\n case \"generic\":\n if (\"role\" in fields) {\n if (returnChunk) {\n chunk = new ChatMessageChunk(fields);\n } else {\n msg = new ChatMessage(fields);\n }\n } else {\n throw new Error(\"Can not convert ChatMessage to ChatMessageChunk if 'role' field is not defined.\");\n }\n break;\n default:\n throw new Error(`Unrecognized message type ${messageType}`);\n }\n if (returnChunk && chunk) {\n return chunk;\n }\n if (msg) {\n return msg;\n }\n throw new Error(`Unrecognized message type ${messageType}`);\n}\nfunction _chunkToMsg(chunk) {\n const chunkType = chunk._getType();\n let msg;\n const fields = Object.fromEntries(Object.entries(chunk).filter(([k]) => ![\"type\", \"tool_call_chunks\"].includes(k) && !k.startsWith(\"lc_\")));\n if (chunkType in _MSG_CHUNK_MAP) {\n msg = _switchTypeToMessage(chunkType, fields);\n }\n if (!msg) {\n throw new Error(`Unrecognized message chunk class ${chunkType}. Supported classes are ${Object.keys(_MSG_CHUNK_MAP)}`);\n }\n return msg;\n}\n/**\n * The default text splitter function that splits text by newlines.\n *\n * @param {string} text\n * @returns A promise that resolves to an array of strings split by newlines.\n */\nexport function defaultTextSplitter(text) {\n const splits = text.split(\"\\n\");\n return Promise.resolve([...splits.slice(0, -1).map(s => `${s}\\n`), splits[splits.length - 1]]);\n}","map":{"version":3,"names":["RunnableLambda","AIMessage","AIMessageChunk","ChatMessage","ChatMessageChunk","FunctionMessage","FunctionMessageChunk","HumanMessage","HumanMessageChunk","RemoveMessage","SystemMessage","SystemMessageChunk","ToolMessage","ToolMessageChunk","convertToChunk","_isMessageType","msg","types","typesAsStrings","Set","map","t","instantiatedMsgClass","_getType","Error","msgType","some","filterMessages","messagesOrOptions","options","Array","isArray","_filterMessages","from","input","messages","includeNames","excludeNames","includeTypes","excludeTypes","includeIds","excludeIds","filtered","name","includes","id","push","iName","mergeMessageRuns","_mergeMessageRuns","length","merged","curr","last","pop","lastChunk","currChunk","mergedChunks","concat","content","_chunkToMsg","trimMessages","_trimMessagesHelper","trimmerOptions","_x","_x2","_trimMessagesHelper2","apply","arguments","_asyncToGenerator","maxTokens","tokenCounter","strategy","allowPartial","endOn","startOn","includeSystem","textSplitter","listTokenCounter","_ref","msgs","tokenCounts","Promise","all","getNumTokens","reduce","sum","count","_x7","_ref2","_x8","textSplitterFunc","defaultTextSplitter","splitText","_ref3","text","_x9","_firstMaxTokens","partialStrategy","undefined","_lastMaxTokens","_x3","_x4","_firstMaxTokens2","messagesCopy","idx","i","remainingMessages","slice","includedPartial","excluded","numBlock","reversedContent","reverse","partialContent","fields","Object","fromEntries","entries","filter","k","startsWith","updatedMessage","_switchTypeToMessage","slicedMessages","block","type","textBlock","find","splitTexts","numSplits","_","join","endOnArr","_x5","_x6","_lastMaxTokens2","rest","swappedSystem","reversed_","_MSG_CHUNK_MAP","human","message","messageChunk","ai","system","tool","function","generic","remove","messageType","returnChunk","chunk","aiChunkFields","_aiChunkFields$tool_c","tool_call_chunks","tool_calls","tc","index","args","JSON","stringify","chunkType","keys","splits","split","resolve","s"],"sources":["F:/workspace/202226701027/huinongbao-app/node_modules/@langchain/core/dist/messages/transformers.js"],"sourcesContent":["import { RunnableLambda } from \"../runnables/base.js\";\nimport { AIMessage, AIMessageChunk } from \"./ai.js\";\nimport { ChatMessage, ChatMessageChunk, } from \"./chat.js\";\nimport { FunctionMessage, FunctionMessageChunk, } from \"./function.js\";\nimport { HumanMessage, HumanMessageChunk } from \"./human.js\";\nimport { RemoveMessage } from \"./modifier.js\";\nimport { SystemMessage, SystemMessageChunk } from \"./system.js\";\nimport { ToolMessage, ToolMessageChunk, } from \"./tool.js\";\nimport { convertToChunk } from \"./utils.js\";\nconst _isMessageType = (msg, types) => {\n const typesAsStrings = [\n ...new Set(types?.map((t) => {\n if (typeof t === \"string\") {\n return t;\n }\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n const instantiatedMsgClass = new t({});\n if (!(\"_getType\" in instantiatedMsgClass) ||\n typeof instantiatedMsgClass._getType !== \"function\") {\n throw new Error(\"Invalid type provided.\");\n }\n return instantiatedMsgClass._getType();\n })),\n ];\n const msgType = msg._getType();\n return typesAsStrings.some((t) => t === msgType);\n};\nexport function filterMessages(messagesOrOptions, options) {\n if (Array.isArray(messagesOrOptions)) {\n return _filterMessages(messagesOrOptions, options);\n }\n return RunnableLambda.from((input) => {\n return _filterMessages(input, messagesOrOptions);\n });\n}\nfunction _filterMessages(messages, options = {}) {\n const { includeNames, excludeNames, includeTypes, excludeTypes, includeIds, excludeIds, } = options;\n const filtered = [];\n for (const msg of messages) {\n if (excludeNames && msg.name && excludeNames.includes(msg.name)) {\n continue;\n }\n else if (excludeTypes && _isMessageType(msg, excludeTypes)) {\n continue;\n }\n else if (excludeIds && msg.id && excludeIds.includes(msg.id)) {\n continue;\n }\n // default to inclusion when no inclusion criteria given.\n if (!(includeTypes || includeIds || includeNames)) {\n filtered.push(msg);\n }\n else if (includeNames &&\n msg.name &&\n includeNames.some((iName) => iName === msg.name)) {\n filtered.push(msg);\n }\n else if (includeTypes && _isMessageType(msg, includeTypes)) {\n filtered.push(msg);\n }\n else if (includeIds && msg.id && includeIds.some((id) => id === msg.id)) {\n filtered.push(msg);\n }\n }\n return filtered;\n}\nexport function mergeMessageRuns(messages) {\n if (Array.isArray(messages)) {\n return _mergeMessageRuns(messages);\n }\n return RunnableLambda.from(_mergeMessageRuns);\n}\nfunction _mergeMessageRuns(messages) {\n if (!messages.length) {\n return [];\n }\n const merged = [];\n for (const msg of messages) {\n const curr = msg; // Create a shallow copy of the message\n const last = merged.pop();\n if (!last) {\n merged.push(curr);\n }\n else if (curr._getType() === \"tool\" ||\n !(curr._getType() === last._getType())) {\n merged.push(last, curr);\n }\n else {\n const lastChunk = convertToChunk(last);\n const currChunk = convertToChunk(curr);\n const mergedChunks = lastChunk.concat(currChunk);\n if (typeof lastChunk.content === \"string\" &&\n typeof currChunk.content === \"string\") {\n mergedChunks.content = `${lastChunk.content}\\n${currChunk.content}`;\n }\n merged.push(_chunkToMsg(mergedChunks));\n }\n }\n return merged;\n}\nexport function trimMessages(messagesOrOptions, options) {\n if (Array.isArray(messagesOrOptions)) {\n const messages = messagesOrOptions;\n if (!options) {\n throw new Error(\"Options parameter is required when providing messages.\");\n }\n return _trimMessagesHelper(messages, options);\n }\n else {\n const trimmerOptions = messagesOrOptions;\n return RunnableLambda.from((input) => _trimMessagesHelper(input, trimmerOptions));\n }\n}\nasync function _trimMessagesHelper(messages, options) {\n const { maxTokens, tokenCounter, strategy = \"last\", allowPartial = false, endOn, startOn, includeSystem = false, textSplitter, } = options;\n if (startOn && strategy === \"first\") {\n throw new Error(\"`startOn` should only be specified if `strategy` is 'last'.\");\n }\n if (includeSystem && strategy === \"first\") {\n throw new Error(\"`includeSystem` should only be specified if `strategy` is 'last'.\");\n }\n let listTokenCounter;\n if (\"getNumTokens\" in tokenCounter) {\n listTokenCounter = async (msgs) => {\n const tokenCounts = await Promise.all(msgs.map((msg) => tokenCounter.getNumTokens(msg.content)));\n return tokenCounts.reduce((sum, count) => sum + count, 0);\n };\n }\n else {\n listTokenCounter = async (msgs) => tokenCounter(msgs);\n }\n let textSplitterFunc = defaultTextSplitter;\n if (textSplitter) {\n if (\"splitText\" in textSplitter) {\n textSplitterFunc = textSplitter.splitText;\n }\n else {\n textSplitterFunc = async (text) => textSplitter(text);\n }\n }\n if (strategy === \"first\") {\n return _firstMaxTokens(messages, {\n maxTokens,\n tokenCounter: listTokenCounter,\n textSplitter: textSplitterFunc,\n partialStrategy: allowPartial ? \"first\" : undefined,\n endOn,\n });\n }\n else if (strategy === \"last\") {\n return _lastMaxTokens(messages, {\n maxTokens,\n tokenCounter: listTokenCounter,\n textSplitter: textSplitterFunc,\n allowPartial,\n includeSystem,\n startOn,\n endOn,\n });\n }\n else {\n throw new Error(`Unrecognized strategy: '${strategy}'. Must be one of 'first' or 'last'.`);\n }\n}\nasync function _firstMaxTokens(messages, options) {\n const { maxTokens, tokenCounter, textSplitter, partialStrategy, endOn } = options;\n let messagesCopy = [...messages];\n let idx = 0;\n for (let i = 0; i < messagesCopy.length; i += 1) {\n const remainingMessages = i > 0 ? messagesCopy.slice(0, -i) : messagesCopy;\n if ((await tokenCounter(remainingMessages)) <= maxTokens) {\n idx = messagesCopy.length - i;\n break;\n }\n }\n if (idx < messagesCopy.length - 1 && partialStrategy) {\n let includedPartial = false;\n if (Array.isArray(messagesCopy[idx].content)) {\n const excluded = messagesCopy[idx];\n if (typeof excluded.content === \"string\") {\n throw new Error(\"Expected content to be an array.\");\n }\n const numBlock = excluded.content.length;\n const reversedContent = partialStrategy === \"last\"\n ? [...excluded.content].reverse()\n : excluded.content;\n for (let i = 1; i <= numBlock; i += 1) {\n const partialContent = partialStrategy === \"first\"\n ? reversedContent.slice(0, i)\n : reversedContent.slice(-i);\n const fields = Object.fromEntries(Object.entries(excluded).filter(([k]) => k !== \"type\" && !k.startsWith(\"lc_\")));\n const updatedMessage = _switchTypeToMessage(excluded._getType(), {\n ...fields,\n content: partialContent,\n });\n const slicedMessages = [...messagesCopy.slice(0, idx), updatedMessage];\n if ((await tokenCounter(slicedMessages)) <= maxTokens) {\n messagesCopy = slicedMessages;\n idx += 1;\n includedPartial = true;\n }\n else {\n break;\n }\n }\n if (includedPartial && partialStrategy === \"last\") {\n excluded.content = [...reversedContent].reverse();\n }\n }\n if (!includedPartial) {\n const excluded = messagesCopy[idx];\n let text;\n if (Array.isArray(excluded.content) &&\n excluded.content.some((block) => typeof block === \"string\" || block.type === \"text\")) {\n const textBlock = excluded.content.find((block) => block.type === \"text\" && block.text);\n text = textBlock?.text;\n }\n else if (typeof excluded.content === \"string\") {\n text = excluded.content;\n }\n if (text) {\n const splitTexts = await textSplitter(text);\n const numSplits = splitTexts.length;\n if (partialStrategy === \"last\") {\n splitTexts.reverse();\n }\n for (let _ = 0; _ < numSplits - 1; _ += 1) {\n splitTexts.pop();\n excluded.content = splitTexts.join(\"\");\n if ((await tokenCounter([...messagesCopy.slice(0, idx), excluded])) <=\n maxTokens) {\n if (partialStrategy === \"last\") {\n excluded.content = [...splitTexts].reverse().join(\"\");\n }\n messagesCopy = [...messagesCopy.slice(0, idx), excluded];\n idx += 1;\n break;\n }\n }\n }\n }\n }\n if (endOn) {\n const endOnArr = Array.isArray(endOn) ? 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