module JsonTruncate

# File lib/json_truncate/truncate.rb, line 2
def self.truncate(object, opts = {})
    process(object, opts)
end

# File lib/json_truncate/truncate.rb, line 8
def self.process(object, opts, depth = 0)
    depth += 1

    if opts[:max_array_length] && object.is_a?(Array) && object.length > opts[:max_array_length]
        object = object.dup
        object.slice!(opts[:max_array_length]..-1)
        object.push('...')
    end

    if opts[:max_string_length] && object.is_a?(String) && object.length > opts[:max_string_length]
        object = object.dup
        object.slice!(opts[:max_string_length]..-1)
        object << '...'
    end

    if opts[:max_depth] && depth > opts[:max_depth] && [ Array, Hash ].include?(object.class)
        object = object.dup
        object.delete_if { |_| true }
    end

    if object.is_a?(Hash)
        object = object.dup
        object.each do |k,v|
            object[k] = process(v, opts, depth)
        end
    elsif object.is_a?(Array)
        object = object.map do |v|
            process(v, opts, depth)
        end
    end

    object
end