JPY USD Conversion (usable with Alfred)

usd-jpy-jpy-usd.sh

#!/bin/bash

query="$1"

# Simple function to add commas using Python (most reliable)
add_commas() {
    python3 -c "print(f'{float('$1'):,.2f}')"
}

if [[ $query =~ ^([0-9]+\.?[0-9]*)$ ]]; then
    amount="$1"
    
    # Get exchange rate
    rate=$(curl -s "https://api.exchangerate-api.com/v4/latest/USD" | grep -o '"JPY":[0-9.]*' | cut -d':' -f2)
    if [[ -z "$rate" ]]; then
        rate="145.0"
    fi
    
    # Calculate conversions
    usd_to_jpy_raw=$(echo "$amount * $rate" | bc -l)
    jpy_to_usd_raw=$(echo "scale=4; $amount / $rate" | bc -l)
    
    # Format with commas
    amount_fmt=$(add_commas "$amount")
    usd_to_jpy_fmt=$(add_commas "$usd_to_jpy_raw")
    jpy_to_usd_fmt=$(add_commas "$jpy_to_usd_raw")
    
    # Output JSON
    cat << EOF
{
  "items": [
    {
      "uid": "usd-to-jpy",
      "title": "\$$amount_fmt USD = ¥$usd_to_jpy_fmt JPY",
      "subtitle": "Press Enter to show both conversions on screen",
      "arg": "\$$amount_fmt USD = ¥$usd_to_jpy_fmt JPY\n¥$amount_fmt JPY = \$$jpy_to_usd_fmt USD\n\nRate: 1 USD = ¥$rate JPY"
    },
    {
      "uid": "jpy-to-usd",
      "title": "¥$amount_fmt JPY = \$$jpy_to_usd_fmt USD",
      "subtitle": "Press Enter to show both conversions on screen", 
      "arg": "\$$amount_fmt USD = ¥$usd_to_jpy_fmt JPY\n¥$amount_fmt JPY = \$$jpy_to_usd_fmt USD\n\nRate: 1 USD = ¥$rate JPY"
    },
    {
      "uid": "rate",
      "title": "Rate: 1 USD = ¥$rate JPY",
      "subtitle": "Press Enter to show both conversions on screen",
      "arg": "\$$amount_fmt USD = ¥$usd_to_jpy_fmt JPY\n¥$amount_fmt JPY = \$$jpy_to_usd_fmt USD\n\nRate: 1 USD = ¥$rate JPY"
    }
  ]
}
EOF

else
    cat << EOF
{
  "items": [
    {
      "uid": "usage",
      "title": "Enter a number for USD/JPY conversion",
      "subtitle": "Example: j 100",
      "valid": false
    }
  ]
}
EOF
fi