feat: Add various tools for document processing and management

- Introduced `docx-extractor` for extracting content and metadata from Word .docx files.
- Added `docx2md` for converting Word .docx files to Markdown format.
- Implemented `gpt` for generating text using OpenAI's GPT models.
- Created `html2text` for converting HTML content to plain text.
- Developed `mbox2eml` for converting MBOX mailbox files to individual .eml files.
- Added `md2pdf` for converting Markdown files to PDF format.
- Introduced `mdscraper` for combining text files into a single markdown document.
- Created `pdf-extractor` for extracting content and metadata from PDF files.
- Developed `pdf2md` for converting PDF files to Markdown format.
- Implemented `protonmail` for managing ProtonMail emails via Bridge.
- Added `schedule` for managing systemd timers and services.
- Introduced `search` for managing searchable collections of files.
- Added `text-extractor` for extracting content and metadata from text files.
- Removed outdated recommendations document.

components/pdf-extractor/src/pdf_extractor/main.py

@@ -0,0 +1,168 @@
+#!/usr/bin/env python3
+"""
+pdf-extractor: Extract content and metadata from PDF files
+
+Reads a PDF file and outputs a JSON object containing the file's content
+and metadata including filename, size, page count, title, author, etc.
+
+Usage: pdf-extractor [options] [FILE]
+
+Examples:
+  pdf-extractor document.pdf           # Extract from a PDF file
+  cat document.pdf | pdf-extractor     # Read from stdin (if applicable)
+"""
+
+import sys
+import os
+import json
+import argparse
+import fitz  # PyMuPDF
+from datetime import datetime
+import mimetypes
+from pathlib import Path
+import tempfile
+
+
+def get_file_metadata(file_path):
+    """Get file metadata including creation time, modification time, size, etc."""
+    path = Path(file_path)
+    stat = path.stat()
+
+    # Get file modification and creation times
+    mtime = datetime.fromtimestamp(stat.st_mtime).isoformat()
+    try:
+        ctime = datetime.fromtimestamp(stat.st_ctime).isoformat()
+    except Exception:
+        ctime = mtime  # Fallback if creation time not available
+
+    # Get mime type
+    mime_type, _ = mimetypes.guess_type(file_path)
+    if not mime_type:
+        mime_type = "application/pdf"  # Default to PDF
+
+    return {
+        "filename": path.name,
+        "path": str(path.absolute()),
+        "size": stat.st_size,
+        "created_at": ctime,
+        "modified_at": mtime,
+        "mime_type": mime_type,
+        "extension": path.suffix.lstrip(".") if path.suffix else "pdf",
+    }
+
+
+def extract_pdf_content(file_path):
+    """Extract content and metadata from a PDF file."""
+    try:
+        doc = fitz.open(file_path)
+
+        # Extract PDF metadata
+        metadata = doc.metadata if doc.metadata else {}
+        pdf_metadata = {
+            "page_count": doc.page_count,
+            "title": metadata.get("title", ""),
+            "author": metadata.get("author", ""),
+            "subject": metadata.get("subject", ""),
+            "keywords": metadata.get("keywords", ""),
+            "creator": metadata.get("creator", ""),
+            "producer": metadata.get("producer", ""),
+            "creation_date": metadata.get("creationDate", ""),
+            "modification_date": metadata.get("modDate", ""),
+        }
+
+        # Extract text content from all pages
+        content = ""
+        for page_num in range(doc.page_count):
+            page = doc[page_num]
+            content += page.get_text()  # type: ignore
+            content += "\n\n"  # Add spacing between pages
+
+        doc.close()
+        return content, pdf_metadata
+    except Exception as e:
+        sys.stderr.write(f"Error extracting PDF content: {e}\n")
+        return "", {}
+
+
+def process_file(file_path):
+    """Extract content and metadata from the file."""
+    # Check if we're dealing with stdin or a file
+    temp_file = None
+
+    try:
+        if not file_path or file_path == "-":
+            # Reading from stdin, save to temporary file
+            temp_file = tempfile.NamedTemporaryFile(delete=False, suffix=".pdf")
+            temp_file.write(sys.stdin.buffer.read())
+            temp_file.close()
+            file_path = temp_file.name
+
+            # Create basic metadata for stdin input
+            metadata = {
+                "filename": "stdin",
+                "path": "stdin",
+                "size": os.path.getsize(file_path),
+                "created_at": datetime.now().isoformat(),
+                "modified_at": datetime.now().isoformat(),
+                "mime_type": "application/pdf",
+                "extension": "pdf",
+            }
+        else:
+            # Reading from a file
+            if not os.path.exists(file_path):
+                sys.stderr.write(f"Error: File '{file_path}' not found.\n")
+                return {}
+
+            # Get file metadata
+            metadata = get_file_metadata(file_path)
+
+        # Extract PDF content and PDF-specific metadata
+        content, pdf_metadata = extract_pdf_content(file_path)
+
+        # Create result object
+        result = {
+            **metadata,
+            **pdf_metadata,
+            "content": content,
+            "title": pdf_metadata.get("title") or metadata["filename"],
+            "tags": [tag.strip() for tag in pdf_metadata.get("keywords", "").split(",")]
+            if pdf_metadata.get("keywords")
+            else [],
+        }
+
+        return result
+    finally:
+        # Clean up the temporary file if one was created
+        if temp_file and os.path.exists(temp_file.name):
+            os.unlink(temp_file.name)
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Extract content and metadata from PDF files",
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+        epilog=__doc__.split("\n\n", 1)[1]
+        if __doc__
+        else "",  # Use the docstring as extended help
+    )
+    parser.add_argument("file", nargs="?", help="Input file (default: stdin)")
+    parser.add_argument(
+        "-v", "--version", action="version", version="pdf-extractor 1.0.0"
+    )
+    args = parser.parse_args()
+
+    try:
+        # Process the file
+        result = process_file(args.file)
+
+        # Output the result as JSON
+        print(json.dumps(result, indent=2))
+
+        return 0
+    except Exception as e:
+        sys.stderr.write(f"Error: {e}\n")
+        return 1
+
+
+if __name__ == "__main__":
+    sys.exit(main())