download_x_video.sh

#!/bin/bash

# Exit immediately if a command exits with a non-zero status or an unset variable is used.
set -euo pipefail

# A script to convert Twitter/X status URLs to the fixupx.com direct video link format
# and initiate a download using wget.

# Function: convert_x_link
# Purpose: Takes a full Twitter/X status URL, strips tracking parameters, and 
#          converts it to a fixupx.com direct video link by extracting the status ID.
# Arguments:
#   $1 - The full URL (e.g., https://x.com/user/status/12345?t=tracking)
# Output: The converted fixupx URL.
convert_x_link() {
    local url="$1"
    
    # 1. Check if the input is empty
    if [[ -z "$url" ]]; then
        echo ""
        return
    fi

    # 2. Strip any query parameters (everything from the first '?' to the end).
    # This uses Bash parameter expansion: '%%' removes the longest match from the end.
    local clean_url="${url%%\?*}"

    # 3. Extract the status ID using Bash parameter expansion.
    # This removes the longest matching pattern from the beginning of the string up to the last '/'.
    # Example: https://x.com/.../status/12345 becomes 12345
    local status_id="${clean_url##*/}"

    # 4. Basic validation for the extracted ID (should be purely numeric and long)
    if ! [[ "$status_id" =~ ^[0-9]{15,}$ ]]; then
        # Print error to standard error stream
        echo "Error: Skipped invalid status link: $url (ID: $status_id)" >&2
        echo ""
        return
    fi

    # 5. Construct the new target URL for wget
    local fixupx_url="https://fixupx.com/i/status/${status_id}.mp4"
    
    # Return the new URL
    echo "$fixupx_url"
}

# --- Main Script Execution ---

# Check if any arguments were provided
if [[ $# -eq 0 ]]; then
    echo "Usage: $0 <x_link_1> [x_link_2]..."
    exit 1
fi

# Array to store the final converted URLs.
DOWNLOAD_URLS=()

# Loop through all command-line arguments passed to the script ($@)
for link in "$@"; do
    converted_link=$(convert_x_link "$link")
    
    # Only add successful conversions to the array
    if [[ -n "$converted_link" ]]; then
        DOWNLOAD_URLS+=("$converted_link")
    fi
done

# Check if any valid URLs were collected
if [[ ${#DOWNLOAD_URLS[@]} -eq 0 ]]; then
    echo "Aborting: No valid X/Twitter status links were converted."
    exit 1
fi

echo "--- Converted URLs Ready for Download ---"
echo "Target URLs: ${DOWNLOAD_URLS[@]}"
echo ""
echo "Initiating 'wget' to download..."

# Execute wget with the array of converted URLs.
# 'exec' replaces the current shell process with the wget process.
# The quoting "${DOWNLOAD_URLS[@]}" ensures each element is passed as a separate, safe argument.
exec wget "${DOWNLOAD_URLS[@]}"