libify: Move library sources down into lib directory.

A "make" invocation still works from the top-level, but not from
down inside the lib directory yet.

1 files changed, 301 insertions, 0 deletions

diff --git a/lib/query.cc b/lib/query.cc
new file mode 100644
index 00000000..ed576614
--- /dev/null
+++ b/lib/query.cc
@@ -0,0 +1,301 @@
+/* query.cc - Support for searching a notmuch database
+ *
+ * Copyright © 2009 Carl Worth
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see http://www.gnu.org/licenses/ .
+ *
+ * Author: Carl Worth <cworth@cworth.org>
+ */
+
+#include "notmuch-private.h"
+#include "database-private.h"
+
+#include <glib.h> /* GHashTable, GPtrArray */
+
+#include <xapian.h>
+
+struct _notmuch_query {
+    notmuch_database_t *notmuch;
+    const char *query_string;
+    notmuch_sort_t sort;
+};
+
+struct _notmuch_messages {
+    notmuch_database_t *notmuch;
+    Xapian::MSetIterator iterator;
+    Xapian::MSetIterator iterator_end;
+};
+
+struct _notmuch_threads {
+    notmuch_database_t *notmuch;
+    GPtrArray *threads;
+    unsigned int index;
+};
+
+notmuch_query_t *
+notmuch_query_create (notmuch_database_t *notmuch,
+		      const char *query_string)
+{
+    notmuch_query_t *query;
+
+#ifdef DEBUG_QUERY
+    fprintf (stderr, "Query string is:\n%s\n", query_string);
+#endif
+
+    query = talloc (NULL, notmuch_query_t);
+    if (unlikely (query == NULL))
+	return NULL;
+
+    query->notmuch = notmuch;
+
+    query->query_string = talloc_strdup (query, query_string);
+
+    query->sort = NOTMUCH_SORT_DATE_OLDEST_FIRST;
+
+    return query;
+}
+
+void
+notmuch_query_set_sort (notmuch_query_t *query, notmuch_sort_t sort)
+{
+    query->sort = sort;
+}
+
+/* We end up having to call the destructors explicitly because we had
+ * to use "placement new" in order to initialize C++ objects within a
+ * block that we allocated with talloc. So C++ is making talloc
+ * slightly less simple to use, (we wouldn't need
+ * talloc_set_destructor at all otherwise).
+ */
+static int
+_notmuch_messages_destructor (notmuch_messages_t *messages)
+{
+    messages->iterator.~MSetIterator ();
+    messages->iterator_end.~MSetIterator ();
+
+    return 0;
+}
+
+notmuch_messages_t *
+notmuch_query_search_messages (notmuch_query_t *query)
+{
+    notmuch_database_t *notmuch = query->notmuch;
+    const char *query_string = query->query_string;
+    notmuch_messages_t *messages;
+
+    messages = talloc (query, notmuch_messages_t);
+    if (unlikely (messages == NULL))
+	return NULL;
+
+    try {
+	Xapian::Enquire enquire (*notmuch->xapian_db);
+	Xapian::Query mail_query (talloc_asprintf (query, "%s%s",
+						   _find_prefix ("type"),
+						   "mail"));
+	Xapian::Query string_query, final_query;
+	Xapian::MSet mset;
+	unsigned int flags = (Xapian::QueryParser::FLAG_BOOLEAN |
+			      Xapian::QueryParser::FLAG_PHRASE |
+			      Xapian::QueryParser::FLAG_LOVEHATE |
+			      Xapian::QueryParser::FLAG_BOOLEAN_ANY_CASE |
+			      Xapian::QueryParser::FLAG_WILDCARD);
+
+	if (strcmp (query_string, "") == 0) {
+	    final_query = mail_query;
+	} else {
+	    string_query = notmuch->query_parser->
+		parse_query (query_string, flags);
+	    final_query = Xapian::Query (Xapian::Query::OP_AND,
+					 mail_query, string_query);
+	}
+
+	switch (query->sort) {
+	case NOTMUCH_SORT_DATE_OLDEST_FIRST:
+	    enquire.set_sort_by_value (NOTMUCH_VALUE_TIMESTAMP, FALSE);
+	    break;
+	case NOTMUCH_SORT_DATE_NEWEST_FIRST:
+	    enquire.set_sort_by_value (NOTMUCH_VALUE_TIMESTAMP, TRUE);
+	    break;
+	case NOTMUCH_SORT_MESSAGE_ID:
+	    enquire.set_sort_by_value (NOTMUCH_VALUE_MESSAGE_ID, FALSE);
+	    break;
+	}
+
+#if DEBUG_QUERY
+	fprintf (stderr, "Final query is:\n%s\n", final_query.get_description().c_str());
+#endif
+
+	enquire.set_query (final_query);
+
+	mset = enquire.get_mset (0, notmuch->xapian_db->get_doccount ());
+
+	messages->notmuch = notmuch;
+
+	new (&messages->iterator) Xapian::MSetIterator ();
+	new (&messages->iterator_end) Xapian::MSetIterator ();
+
+	talloc_set_destructor (messages, _notmuch_messages_destructor);
+
+	messages->iterator = mset.begin ();
+	messages->iterator_end = mset.end ();
+
+    } catch (const Xapian::Error &error) {
+	fprintf (stderr, "A Xapian exception occurred: %s\n",
+		 error.get_msg().c_str());
+    }
+
+    return messages;
+}
+
+/* Glib objects force use to use a talloc destructor as well, (but not
+ * nearly as ugly as the for messages due to C++ objects). At
+ * this point, I'd really like to have some talloc-friendly
+ * equivalents for the few pieces of glib that I'm using. */
+static int
+_notmuch_threads_destructor (notmuch_threads_t *threads)
+{
+    g_ptr_array_free (threads->threads, TRUE);
+
+    return 0;
+}
+
+notmuch_threads_t *
+notmuch_query_search_threads (notmuch_query_t *query)
+{
+    notmuch_threads_t *threads;
+    notmuch_thread_t *thread;
+    const char *thread_id;
+    notmuch_messages_t *messages;
+    notmuch_message_t *message;
+    GHashTable *seen;
+
+    threads = talloc (query, notmuch_threads_t);
+    if (threads == NULL)
+	return NULL;
+
+    threads->notmuch = query->notmuch;
+    threads->threads = g_ptr_array_new ();
+    threads->index = 0;
+
+    talloc_set_destructor (threads, _notmuch_threads_destructor);
+
+    seen = g_hash_table_new_full (g_str_hash, g_str_equal,
+				  free, NULL);
+
+    for (messages = notmuch_query_search_messages (query);
+	 notmuch_messages_has_more (messages);
+	 notmuch_messages_advance (messages))
+    {
+	message = notmuch_messages_get (messages);
+
+	thread_id = notmuch_message_get_thread_id (message);
+
+	if (! g_hash_table_lookup_extended (seen,
+					    thread_id, NULL,
+					    (void **) &thread))
+	{
+	    thread = _notmuch_thread_create (query, query->notmuch,
+					     thread_id);
+
+	    g_hash_table_insert (seen, xstrdup (thread_id), thread);
+
+	    g_ptr_array_add (threads->threads, thread);
+	}
+
+	_notmuch_thread_add_message (thread, message);
+
+	notmuch_message_destroy (message);
+    }
+
+    g_hash_table_unref (seen);
+
+    return threads;
+}
+
+void
+notmuch_query_destroy (notmuch_query_t *query)
+{
+    talloc_free (query);
+}
+
+notmuch_bool_t
+notmuch_messages_has_more (notmuch_messages_t *messages)
+{
+    return (messages->iterator != messages->iterator_end);
+}
+
+notmuch_message_t *
+notmuch_messages_get (notmuch_messages_t *messages)
+{
+    notmuch_message_t *message;
+    Xapian::docid doc_id;
+    notmuch_private_status_t status;
+
+    if (! notmuch_messages_has_more (messages))
+	return NULL;
+
+    doc_id = *messages->iterator;
+
+    message = _notmuch_message_create (messages,
+				       messages->notmuch, doc_id,
+				       &status);
+
+    if (message == NULL &&
+	status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND)
+    {
+	INTERNAL_ERROR ("a messages iterator contains a non-existent document ID.\n");
+    }
+
+    return message;
+}
+
+void
+notmuch_messages_advance (notmuch_messages_t *messages)
+{
+    messages->iterator++;
+}
+
+void
+notmuch_messages_destroy (notmuch_messages_t *messages)
+{
+    talloc_free (messages);
+}
+
+notmuch_bool_t
+notmuch_threads_has_more (notmuch_threads_t *threads)
+{
+    return (threads->index < threads->threads->len);
+}
+
+notmuch_thread_t *
+notmuch_threads_get (notmuch_threads_t *threads)
+{
+    if (! notmuch_threads_has_more (threads))
+	return NULL;
+
+    return (notmuch_thread_t *) g_ptr_array_index (threads->threads,
+						   threads->index);
+}
+
+void
+notmuch_threads_advance (notmuch_threads_t *threads)
+{
+    threads->index++;
+}
+
+void
+notmuch_threads_destroy (notmuch_threads_t *threads)
+{
+    talloc_free (threads);
+}