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15 lines
641 B
TypeScript
15 lines
641 B
TypeScript
import type { Message } from "@langchain/langgraph-sdk";
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/**
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* Extracts a string summary from a message's content, supporting multimodal (text, image, file, etc.).
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* - If text is present, returns the joined text.
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* - If not, returns a label for the first non-text modality (e.g., 'Image', 'Other').
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* - If unknown, returns 'Multimodal message'.
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*/
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export function getContentString(content: Message["content"]): string {
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if (typeof content === "string" || !content) return content;
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const texts = content
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.filter((c): c is { type: "text"; text: string } => c.type === "text")
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.map((c) => c.text);
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return texts.join(" ");
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}
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