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// file : mod/mod-package-search.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <mod/mod-package-search.hxx>
#include <libstudxml/serializer.hxx>
#include <odb/session.hxx>
#include <odb/database.hxx>
#include <odb/transaction.hxx>
#include <odb/schema-catalog.hxx>
#include <web/xhtml.hxx>
#include <web/module.hxx>
#include <web/mime-url-encoding.hxx>
#include <libbrep/package.hxx>
#include <libbrep/package-odb.hxx>
#include <mod/page.hxx>
#include <mod/options.hxx>
using namespace odb::core;
using namespace brep::cli;
// While currently the user-defined copy constructor is not required (we don't
// need to deep copy nullptr's), it is a good idea to keep the placeholder
// ready for less trivial cases.
//
brep::package_search::
package_search (const package_search& r)
: database_module (r),
options_ (r.initialized_ ? r.options_ : nullptr)
{
}
void brep::package_search::
init (scanner& s)
{
HANDLER_DIAG;
options_ = make_shared<options::package_search> (
s, unknown_mode::fail, unknown_mode::fail);
database_module::init (*options_, options_->package_db_retry ());
if (options_->root ().empty ())
options_->root (dir_path ("/"));
// Check that the database 'package' schema matches the current one. It's
// enough to perform the check in just a single module implementation (and we
// don't do in the dispatcher because it doesn't use the database).
//
// Note that the failure can be reported by each web server worker process.
// While it could be tempting to move the check to the
// repository_root::version() function, it would be wrong. The function can
// be called by a different process (usually the web server root one) not
// having the proper permissions to access the database.
//
const string ds ("package");
if (schema_catalog::current_version (*package_db_, ds) !=
package_db_->schema_version (ds))
fail << "database 'package' schema differs from the current one (module "
<< BREP_VERSION_ID << ")";
}
template <typename T>
static inline query<T>
search_param (const brep::string& q)
{
using query = query<T>;
return "(" +
(q.empty ()
? query ("NULL")
: "plainto_tsquery (" + query::_val (q) + ")") +
")";
}
bool brep::package_search::
handle (request& rq, response& rs)
{
using namespace web::xhtml;
HANDLER_DIAG;
const size_t res_page (options_->search_results ());
const dir_path& root (options_->root ());
const string& title (options_->search_title ());
params::package_search params;
try
{
name_value_scanner s (rq.parameters (8 * 1024));
params = params::package_search (
s, unknown_mode::fail, unknown_mode::fail);
}
catch (const cli::exception& e)
{
throw invalid_request (400, e.what ());
}
size_t page (params.page ());
const string& squery (params.query ());
string squery_param (squery.empty ()
? ""
: "?q=" + web::mime_url_encode (squery));
xml::serializer s (rs.content (), title);
s << HTML
<< HEAD
<< TITLE
<< title;
if (!squery.empty ())
s << " " << squery;
s << ~TITLE
<< CSS_LINKS (path ("package-search.css"), root)
//
// This hack is required to avoid the "flash of unstyled content", which
// happens due to the presence of the autofocus attribute in the input
// element of the search form. The problem appears in Firefox and has a
// (4-year old, at the time of this writing) bug report:
//
// https://bugzilla.mozilla.org/show_bug.cgi?id=712130
//
// @@ An update: claimed to be fixed in Firefox 60 that is released in
// May 2018. Is it time to cleanup? Remember to cleanup in all places.
//
<< SCRIPT << " " << ~SCRIPT
<< ~HEAD
<< BODY
<< DIV_HEADER (root, options_->logo (), options_->menu ())
<< DIV(ID="content");
session sn;
transaction t (package_db_->begin ());
auto pkg_count (
package_db_->query_value<latest_package_count> (
search_param<latest_package_count> (squery)));
s << FORM_SEARCH (squery)
<< DIV_COUNTER (pkg_count, "Package", "Packages");
// Enclose the subsequent tables to be able to use nth-child CSS selector.
//
s << DIV;
for (const auto& pr:
package_db_->query<latest_package_search_rank> (
search_param<latest_package_search_rank> (squery) +
"ORDER BY rank DESC, name" +
"OFFSET" + to_string (page * res_page) +
"LIMIT" + to_string (res_page)))
{
shared_ptr<package> p (package_db_->load<package> (pr.id));
s << TABLE(CLASS="proplist package")
<< TBODY
<< TR_NAME (p->id.name, squery_param, root)
<< TR_SUMMARY (p->summary)
<< TR_LICENSE (p->license_alternatives)
<< TR_TAGS (p->tags, root)
<< TR_DEPENDS (p->dependencies, root)
<< TR_REQUIRES (p->requirements)
<< ~TBODY
<< ~TABLE;
}
s << ~DIV;
t.commit ();
s << DIV_PAGER (page, pkg_count, res_page, options_->search_pages (),
root.string () + squery_param)
<< ~DIV
<< ~BODY
<< ~HTML;
return true;
}
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