#!/bin/bash

parse_desktop_file() {
    local file="$1"
    local section=""

    local mainexec=""
    local mainname=""

    while IFS= read -r line || [[ -n "$line" ]]; do
        if [[ "$line" =~ ^\;.* || "$line" =~ ^#.* || -z "$line" ]]; then
            continue
        fi

        if [[ "$line" =~ ^\[.*\]$ ]]; then
            section="${line:1:-1}"
            continue
        fi

        if [[ "$line" =~ ^([^=]+)=(.*)$ ]]; then
            key="${BASH_REMATCH[1]}"
            value="${BASH_REMATCH[2]}"
            # echo "[$section] $key = $value"
            
            if [ "$section" == "Desktop Entry" ]; then
                if [ "$key" == "Exec" ]; then mainexec=$value; fi
                if [ "$key" == "Name" ]; then mainname=$value; fi
            fi
        fi
    done < "$file"

    echo "{\"file\": \"$file\", \"name\": \"$mainname\", \"exec\": \"$mainexec\"}"
}

shopt -s nullglob
IFS=':' read -r -a paths <<< "$XDG_DATA_DIRS:/home/$USER/.local/share/"
for path in "${paths[@]}"; do
  AP=$(realpath "$path/applications")
  for appfile in $AP/*.desktop; do
     parse_desktop_file $appfile;
  done
done
shopt -u nullglob