ladybird/Userland/Utilities/fortune.cpp
Tim Ledbetter 7f99f3bf29 fortune: Use simple formatting when stdout isn't connected to a terminal
This changes the default behavior, so that, by default, color codes,
hyperlinks and additional spacing are only emitted when standard
output is connected to a terminal.

The default coloring behavior can be overridden with the `--color`
option. Valid arguments for this option are: 'always', 'never' and
'auto' (default).
2023-08-06 08:58:00 +02:00

156 lines
5.2 KiB
C++

/*
* Copyright (c) 2021, Ben Wiederhake <BenWiederhake.GitHub@gmx.de>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/JsonValue.h>
#include <AK/Optional.h>
#include <AK/Random.h>
#include <AK/Vector.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/DateTime.h>
#include <LibCore/File.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
class Quote {
public:
static Optional<Quote> try_parse(JsonValue const& value)
{
if (!value.is_object())
return {};
auto& entry = value.as_object();
Quote q;
if (!entry.has_string("quote"sv) || !entry.has_string("author"sv) || !entry.has_u64("utc_time"sv) || !entry.has_string("url"sv))
return {};
// From here on, trust that it's probably fine.
q.m_quote = entry.get_deprecated_string("quote"sv).value();
q.m_author = entry.get_deprecated_string("author"sv).value();
q.m_utc_time = entry.get_u64("utc_time"sv).value();
q.m_url = entry.get_deprecated_string("url"sv).value();
if (entry.has("context"sv))
q.m_context = entry.get_deprecated_string("context"sv).value();
return q;
}
DeprecatedString const& quote() const { return m_quote; }
DeprecatedString const& author() const { return m_author; }
u64 const& utc_time() const { return m_utc_time; }
DeprecatedString const& url() const { return m_url; }
Optional<DeprecatedString> const& context() const { return m_context; }
private:
Quote() = default;
DeprecatedString m_quote;
DeprecatedString m_author;
u64 m_utc_time;
DeprecatedString m_url;
Optional<DeprecatedString> m_context;
};
static Vector<Quote> parse_all(JsonArray const& array)
{
Vector<Quote> quotes;
for (size_t i = 0; i < array.size(); ++i) {
Optional<Quote> q = Quote::try_parse(array[i]);
if (!q.has_value()) {
warnln("WARNING: Could not parse quote #{}!", i);
} else {
quotes.append(q.value());
}
}
return quotes;
}
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
TRY(Core::System::pledge("stdio rpath"));
StringView path = "/res/fortunes.json"sv;
Optional<bool> force_color;
Core::ArgsParser args_parser;
args_parser.set_general_help("Open a fortune cookie, receive a free quote for the day!");
args_parser.add_option(Core::ArgsParser::Option {
.argument_mode = Core::ArgsParser::OptionArgumentMode::Required,
.help_string = "Chose when to color the output. Valid options are always, never and auto (default). When color is set to auto, color codes will be emitted when stdout is a terminal",
.long_name = "color",
.value_name = "when",
.accept_value = [&force_color](StringView color_when_string) {
if (color_when_string.equals_ignoring_ascii_case("always"sv)) {
force_color = true;
} else if (color_when_string.equals_ignoring_ascii_case("never"sv)) {
force_color = false;
} else if (!color_when_string.equals_ignoring_ascii_case("auto"sv)) {
warnln("Unknown argument '{}'. Valid arguments for --color are always, never and auto", color_when_string);
return false;
}
return true;
},
});
args_parser.add_positional_argument(path, "Path to JSON file with quotes (/res/fortunes.json by default)", "path", Core::ArgsParser::Required::No);
args_parser.parse(arguments);
auto file = TRY(Core::File::open(path, Core::File::OpenMode::Read));
TRY(Core::System::unveil("/etc/timezone", "r"));
TRY(Core::System::unveil(nullptr, nullptr));
auto file_contents = TRY(file->read_until_eof());
auto json = TRY(JsonValue::from_string(file_contents));
if (!json.is_array()) {
warnln("{} does not contain an array of quotes", path);
return 1;
}
auto const quotes = parse_all(json.as_array());
if (quotes.is_empty()) {
warnln("{} does not contain any valid quotes", path);
return 1;
}
u32 i = get_random_uniform(quotes.size());
auto const& chosen_quote = quotes[i];
auto datetime = Core::DateTime::from_timestamp(chosen_quote.utc_time());
auto stdout_is_tty = TRY(Core::System::isatty(STDOUT_FILENO));
auto show_color = force_color.has_value() ? force_color.value() : stdout_is_tty;
if (stdout_is_tty) {
outln(); // Tasteful spacing
out("\033]8;;{}\033\\", chosen_quote.url()); // Begin link
}
if (show_color) {
out("\033[34m({})\033[m", datetime.to_deprecated_string());
out(" \033[34;1m<{}>\033[m", chosen_quote.author());
out(" \033[32m{}\033[m", chosen_quote.quote());
} else {
out("({})", datetime.to_deprecated_string());
out(" <{}>", chosen_quote.author());
out(" {}", chosen_quote.quote());
}
if (stdout_is_tty)
out("\033]8;;\033\\"); // End link
outln();
if (chosen_quote.context().has_value())
outln("{}", chosen_quote.context().value());
if (stdout_is_tty)
outln(); // Tasteful spacing
return 0;
}