@juspay/neurolink/dist/rag/chunkers/LaTeXChunker.js

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/**
 * LaTeX Chunker
 *
 * Splits LaTeX documents by sections and environments.
 */
import { BaseChunker, DEFAULT_CHUNKER_CONFIG } from "./BaseChunker.js";
/**
 * LaTeX Chunker
 */
export class LaTeXChunker extends BaseChunker {
    strategy = "latex";
    getDefaultConfig() {
        return {
            ...DEFAULT_CHUNKER_CONFIG,
            maxSize: 1000,
            overlap: 0,
        };
    }
    async doChunk(content, config) {
        const maxSize = config.maxSize ?? 1000;
        // Split by sections
        const sectionPattern = /\\(?:section|subsection|subsubsection|chapter|paragraph)\{[^}]+\}/g;
        const sections = [];
        let lastIndex = 0;
        let match;
        while ((match = sectionPattern.exec(content)) !== null) {
            if (match.index > lastIndex) {
                sections.push(content.slice(lastIndex, match.index));
            }
            lastIndex = match.index;
        }
        if (lastIndex < content.length) {
            sections.push(content.slice(lastIndex));
        }
        if (sections.length === 0) {
            sections.push(content);
        }
        const chunks = [];
        let offset = 0;
        for (const section of sections) {
            const trimmed = section.trim();
            if (!trimmed) {
                continue;
            }
            if (trimmed.length <= maxSize) {
                const startOffset = content.indexOf(trimmed, offset);
                chunks.push(this.createChunk(trimmed, chunks.length, startOffset >= 0 ? startOffset : offset, startOffset >= 0
                    ? startOffset + trimmed.length
                    : offset + trimmed.length));
                if (startOffset >= 0) {
                    offset = startOffset + 1;
                }
            }
            else {
                const segments = this.splitBySizeWithOverlap(trimmed, maxSize, 0);
                for (const segment of segments) {
                    chunks.push(this.createChunk(segment.text, chunks.length, segment.start, segment.end));
                }
            }
        }
        return chunks;
    }
}