Move module implementation from brep/ to mod/

1 files changed, 181 insertions, 0 deletions

diff --git a/mod/mod-package-search.cxx b/mod/mod-package-search.cxx
new file mode 100644
index 0000000..5654427
--- /dev/null
+++ b/mod/mod-package-search.cxx
@@ -0,0 +1,181 @@
+// file      : mod/mod-package-search.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <mod/mod-package-search>
+
+#include <xml/serializer>
+
+#include <odb/session.hxx>
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+#include <odb/schema-catalog.hxx>
+
+#include <web/xhtml>
+#include <web/module>
+#include <web/xhtml-fragment>
+#include <web/mime-url-encoding>
+
+#include <brep/version>
+#include <brep/package>
+#include <brep/package-odb>
+
+#include <mod/page>
+#include <mod/options>
+
+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)
+{
+  MODULE_DIAG;
+
+  options_ = make_shared<options::package_search> (
+    s, unknown_mode::fail, unknown_mode::fail);
+
+  database_module::init (*options_);
+
+  if (options_->root ().empty ())
+    options_->root (dir_path ("/"));
+
+  // Check that the database 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.
+  //
+  if (schema_catalog::current_version (*db_) != db_->schema_version ())
+    fail << "database schema differs from the current one (module "
+         << BREP_VERSION_STR << ")";
+}
+
+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;
+
+  MODULE_DIAG;
+
+  const size_t res_page (options_->search_results ());
+  const dir_path& root (options_->root ());
+
+  params::package_search params;
+
+  try
+  {
+    name_value_scanner s (rq.parameters ());
+    params = params::package_search (
+      s, unknown_mode::fail, unknown_mode::fail);
+  }
+  catch (const unknown_argument& 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));
+
+
+  static const string title ("Packages");
+  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.
+    //
+    <<     SCRIPT << " " << ~SCRIPT
+    <<   ~HEAD
+    <<   BODY
+    <<     DIV_HEADER (root, options_->logo (), options_->menu ())
+    <<     DIV(ID="content");
+
+  session sn;
+  transaction t (db_->begin ());
+
+  auto pkg_count (
+    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:
+           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 (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;
+}