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Help+man+LibManual: Move argument handling to LibManual

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This deduplicates argument handling logic from Help and man and makes it
more modular for future use cases. The argument handling works as
before: two arguments specify section and page (in this order), one
argument specifies either a page (the first section that it's found in
is used) or a path to a manpage markdown file.
This commit is contained in:
kleines Filmröllchen 2022-07-12 20:23:28 +02:00 • committed by Linus Groh
parent 64ca546a06
commit b65258c093
9 changed files with 149 additions and 125 deletions
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70
Userland/Libraries/LibManual/Node.cpp Normal file
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/*
* Copyright (c) 2022, kleines Filmröllchen <filmroellchen@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "Node.h"
#include "PageNode.h"
#include "SectionNode.h"
#include <AK/Assertions.h>
#include <AK/LexicalPath.h>
#include <AK/Optional.h>
#include <AK/StringView.h>
#include <LibCore/File.h>
#include <LibCore/Stream.h>
#include <LibManual/Path.h>
namespace Manual {
ErrorOr<NonnullRefPtr<PageNode>> Node::try_create_from_query(Vector<StringView, 2> const& query_parameters)
{
if (query_parameters.size() > 2)
return Error::from_string_literal("Queries longer than 2 strings are not supported yet");
auto query_parameter_iterator = query_parameters.begin();
if (query_parameter_iterator.is_end())
// BUG! No query was given.
VERIFY_NOT_REACHED();
auto first_query_parameter = *query_parameter_iterator;
++query_parameter_iterator;
if (query_parameter_iterator.is_end()) {
// [/path/to/docs.md]
auto path_from_query = LexicalPath { first_query_parameter };
if (path_from_query.is_absolute()
&& path_from_query.is_child_of(manual_base_path)
&& path_from_query.extension() == "md"sv) {
auto section_directory = path_from_query.parent();
auto man_string_location = section_directory.basename().find("man"sv);
if (!man_string_location.has_value())
return Error::from_string_literal("Page is inside invalid section");
auto section_name = section_directory.basename().substring_view(man_string_location.value() + 3);
auto section = TRY(SectionNode::try_create_from_number(section_name));
return try_make_ref_counted<PageNode>(section, TRY(String::from_utf8(path_from_query.title())));
}
// [page] (in any section)
Optional<NonnullRefPtr<PageNode>> maybe_page;
for (auto const& section : sections) {
auto const page = TRY(try_make_ref_counted<PageNode>(section, TRY(String::from_utf8(first_query_parameter))));
if (Core::File::exists(TRY(page->path()))) {
maybe_page = page;
break;
}
}
if (maybe_page.has_value())
return maybe_page.release_value();
return Error::from_string_literal("Page not found");
}
// [section] [name]
auto second_query_parameter = *query_parameter_iterator;
auto section = TRY(SectionNode::try_create_from_number(first_query_parameter));
auto const page = TRY(try_make_ref_counted<PageNode>(section, TRY(String::from_utf8(second_query_parameter))));
if (Core::File::exists(TRY(page->path())))
return page;
return Error::from_string_literal("Page doesn't exist in section");
}
}