Extract text content from a local file (pdf or text) and append to a prompt

Reads a local PDF or plain text file and appends the extracted content to the provided instruction prompt, wrapped in delimiters. For PDFs, text is extracted using pdftools::pdf_text(). For plain text files (including .txt, .mod, and .ctl), lines are read with readLines(). The resulting prompt is returned and intended to be passed directly as the user message to the LLM.

Usage

extract_file_content(
  file_path,
  file_name,
  detected_type,
  instruction_prompt,
  debug = TRUE
)

Arguments

file_path

Path to the local file to extract text from

file_name

Original filename including extension, used for debug messaging only

detected_type

MIME type of the file. Use "application/pdf" for PDF files and "text/plain" for all plain text formats

instruction_prompt

Base instruction prompt string to which the extracted file content will be appended

debug

If TRUE, prints the extracted character count to the console

Value

A single character string containing instruction_prompt followed by the extracted file content wrapped in --- FILE CONTENT START --- and --- FILE CONTENT END --- delimiters