40 lines
1.3 KiB
Markdown
40 lines
1.3 KiB
Markdown
# CLAUDE.md
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This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
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## Project Overview
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Single-script Python tool that extracts credit card transactions from BAC Costa Rica statement PDFs. Parses section "B) Detalle de compras del periodo" and outputs JSON.
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## Dependencies
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- pdfplumber (>=0.10.0)
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## Usage
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```bash
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python bac_extract.py <pdf_file> <card_suffix> [options]
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# Examples
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python bac_extract.py EstadodeCuenta.pdf 1234 --pretty
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python bac_extract.py statement.pdf 1234 -o output.json -v
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```
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Options:
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- `-o, --output`: Output JSON path (default: transactions.json)
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- `--pretty`: Pretty-print JSON
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- `-v, --verbose`: Enable debug logging
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## Architecture
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The extraction pipeline:
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1. Validates PDF is a BAC statement (`is_bac_statement`)
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2. Locates section B via regex patterns (`find_section_b_start`, `is_section_end`)
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3. Extracts tables page-by-page using pdfplumber
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4. Filters transactions by card suffix (last 4 digits)
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5. Parses Spanish dates (D-MMM-YY format) and amounts with comma separators
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Key parsing functions:
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- `parse_spanish_date`: Converts "15-ENE-25" to "2025-01-15"
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- `parse_amount`: Handles "1,234.56" and trailing negatives "100.00-"
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- `extract_card_holder`: Matches "************1234 NAME" pattern
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