json_outline

#!/bin/bash

# json_outline - A tool to display JSON structure without values
# Usage: json_outline [file] or cat file.json | json_outline
#
#
# Handy tool to have a quick look at json outline, 
# good if you have json with long strings, to look on keys structure first.
#
# can take filename as parameter or stdin.
#
# example:
#
# ```
# $ echo '{"code": 200, "data": {"title": "Test", "nested": {"value": 123}}}' |
#  ./json_outline
# {
#   "code": ...
#   "data": {
#     "title": ...
#     "nested": {
#       "value": ...
#     }
#   }
# }
# ```

# Check if jq is installed
if ! command -v jq &> /dev/null; then
    echo "Error: jq is not installed. Please install it first."
    echo "On Debian/Ubuntu: sudo apt install jq"
    echo "On Fedora/RHEL: sudo dnf install jq"
    echo "On Arch Linux: sudo pacman -S jq"
    exit 1
fi

# Process input (either file or stdin)
if [ $# -eq 1 ]; then
    # Input from file
    if [ ! -f "$1" ]; then
        echo "Error: File '$1' not found."
        exit 1
    fi
    jq -r . "$1" | sed 's/: \([^{[].*\)/: .../g'
else
    # Input from stdin
    jq -r . | sed 's/: \([^{[].*\)/: .../g'
fi