A script to download a public Google Doc from its link, prompts for format with fzf

gdoc-download.sh

#!/bin/bash

# Check if fzf is installed
if ! command -v fzf &> /dev/null; then
    echo "Error: fzf is not installed. Please install it first."
    echo "You can install it with:"
    echo "  - On macOS: brew install fzf"
    echo "  - On Ubuntu/Debian: sudo apt install fzf"
    echo "  - On other systems: see https://github.com/junegunn/fzf#installation"
    exit 1
fi

# Check if curl is installed
if ! command -v curl &> /dev/null; then
    echo "Error: curl is not installed. Please install it first."
    exit 1
fi

# Check arguments
if [ -z "$1" ]; then
    echo "Usage: $0 <google-doc-url> [output-filename]"
    echo "Example: $0 https://docs.google.com/document/d/1234567890abcdefghijklmnopqrstuvwxyz/edit myfile"
    echo "Note: If output-filename is provided, the selected format extension will be added to it"
    exit 1
fi

# Extract document ID from URL
URL="$1"
CUSTOM_FILENAME="$2"

# More robust document ID extraction that works across different grep versions
if [[ "$URL" =~ /document/d/([^/]+) ]]; then
    DOC_ID="${BASH_REMATCH[1]}"
else
    # Try alternative extraction method as fallback
    DOC_ID=$(echo "$URL" | sed -E 's|.*/document/d/([^/?]+).*|\1|')
fi

if [ -z "$DOC_ID" ]; then
    echo "Error: Could not extract document ID from URL."
    echo "Please provide a valid Google Docs URL."
    exit 1
fi

# Format options for fzf (with PDF first) - using simple array instead of associative array
FORMAT_OPTIONS=(
"pdf|PDF Document (Default)" 
"docx|Word Document" 
"odt|OpenDocument Text" 
"txt|Plain Text" 
"html|HTML Document" 
"rtf|Rich Text Format"
"epub|EPUB E-book"
)

# Display format selection with fzf (removed --header-first option)
SELECTED_FORMAT=$(printf "%s\n" "${FORMAT_OPTIONS[@]}" | fzf --height=10 --layout=reverse --prompt="Select format to download: " --header="Press Enter to select, Esc to cancel")

# Exit if no format was selected (user pressed Esc)
if [ -z "$SELECTED_FORMAT" ]; then
    echo "Download cancelled."
    exit 0
fi

# Extract format code from selection
FORMAT=$(echo "$SELECTED_FORMAT" | cut -d'|' -f1)

# Define output filename
if [ -n "$CUSTOM_FILENAME" ]; then
    # Use custom filename with format extension
    FILENAME="${CUSTOM_FILENAME}.$FORMAT"
else
    # Use default naming scheme
    FILENAME="document.$FORMAT"
    COUNT=1

    # Check if file already exists and create a unique filename
    while [ -f "$FILENAME" ]; do
        FILENAME="document-$COUNT.$FORMAT"
        COUNT=$((COUNT+1))
    done
fi

echo "Downloading document as $FORMAT..."
echo "Document ID: $DOC_ID"
echo "Output file: $FILENAME"

# Download the file
curl -L "https://docs.google.com/document/d/$DOC_ID/export?format=$FORMAT" -o "$FILENAME"

# Check if download was successful
if [ $? -eq 0 ]; then
    echo "Download complete: $FILENAME"
else
    echo "Error: Download failed."
    exit 1
fi