rank-torrents.sh

#!/bin/bash
#
# Calculate ratio per day for torrents managed by transmission-daemon
# Adds a lock emoji for private tracker torrents.
#

set -euo pipefail

TR_CMD="transmission-remote"

echo "Fetching torrent list..."
# Get IDs, ignoring the header and footer
TORRENT_IDS=$($TR_CMD --list | awk 'NR>1 && $1 ~ /^[0-9]+(\*?)$/ {gsub(/[^0-9]/,"",$1); print $1}')

printf "%-5s | %-8s | %-10s | %-10s | %s\n" "ID" "Ratio" "Days" "Ratio/Day" "Name"
printf "%0.s-" {1..100}; echo

RESULTS=()

for ID in $TORRENT_IDS; do
    INFO=$($TR_CMD -t "$ID" --info)

    # Parsing fields using awk
    NAME=$(echo "$INFO" | awk -F': ' '/Name:/ {print substr($0, index($0,$2))}')
    RATIO=$(echo "$INFO" | awk -F': ' '/Ratio:/ {print $2}')
    IS_PUBLIC=$(echo "$INFO" | awk -F': ' '/Public torrent:/ {print $2}')
    
    # Extract seeding days
    SEED_DAYS=$(echo "$INFO" | awk -F'[ ()]+' '/Seeding Time:/ {
        for (i=1;i<=NF;i++) {
            if ($i=="days") {print $(i-1); exit}
        }
    }')

    # Skip if seeding for less than 10 days or if SEED_DAYS is empty
    if [[ -z "$SEED_DAYS" || "$SEED_DAYS" -lt 10 ]]; then
        continue
    fi

    # Determine if private tracker (Public torrent: No)
    LOCK_ICON=""
    if [[ "$IS_PUBLIC" == "No" ]]; then
        LOCK_ICON="🔒 "
    fi

    # Calculate Ratio/Day
    RATIO_PER_DAY=$(awk "BEGIN {printf \"%.3f\", $RATIO / $SEED_DAYS}")

    # Store result (using a tab or unique delimiter for the name to handle spaces)
    RESULTS+=("$ID|$RATIO|$SEED_DAYS|$RATIO_PER_DAY|$LOCK_ICON$NAME")
done

# Sort by ratio per day descending
# We use -t'|' to tell sort that the delimiter is the pipe character
IFS=$'\n' SORTED=($(sort -t'|' -k4 -nr <<<"${RESULTS[*]}"))
unset IFS

for ENTRY in "${SORTED[@]}"; do
    IFS='|' read -r ID RATIO SEED_DAYS RATIO_PER_DAY NAME <<<"$ENTRY"
    printf "%-5s | %-8s | %-10s | %-10s | %s\n" "$ID" "$RATIO" "$SEED_DAYS" "$RATIO_PER_DAY" "$NAME"
done

Example output and usage:

ansible@server:~$ bash script.sh 
Fetching torrent list...
ID    | Ratio    | Days       | Ratio/Day  | Name
----------------------------------------------------------------------------------------------------
38    | 41.2     | 104        | 0.396      | Some linux iso
31    | 122      | 313        | 0.390      | another iso
45    | 31.9     | 82         | 0.389      | a pure video