* refactoring: split off 'mu find' and 'mu index' stuff from mu-cmd into
separate files
This commit is contained in:
Dirk-Jan C. Binnema
338
src/mu-cmd-find.c
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338
src/mu-cmd-find.c
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/*
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** Copyright (C) 2010 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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**
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** This program is free software; you can redistribute it and/or modify it
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** under the terms of the GNU General Public License as published by the
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** Free Software Foundation; either version 3, or (at your option) any
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** later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software Foundation,
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** Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**
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*/
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#include "config.h"
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <signal.h>
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#include "mu-msg-gmime.h"
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#include "mu-maildir.h"
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#include "mu-index.h"
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#include "mu-query-xapian.h"
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#include "mu-msg-iter-xapian.h"
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#include "mu-msg-str.h"
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#include "mu-util.h"
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#include "mu-util-xapian.h"
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#include "mu-cmd-find.h"
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static void
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update_warning (void)
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{
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g_warning ("the database needs to be updated to version %s",
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MU_XAPIAN_DB_VERSION);
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g_message ("please run 'mu index --empty' (see the manpage)");
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}
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static gboolean
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print_query (MuQueryXapian *xapian, const gchar *query)
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{
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char *querystr;
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MU_WRITE_LOG ("query: '%s' (xquery)", query);
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querystr = mu_query_xapian_as_string (xapian, query);
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g_print ("%s\n", querystr);
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g_free (querystr);
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return TRUE;
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}
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static const gchar*
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display_field (MuMsgIterXapian *iter, const MuMsgField* field)
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{
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gint64 val;
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switch (mu_msg_field_type(field)) {
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case MU_MSG_FIELD_TYPE_STRING:
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return mu_msg_iter_xapian_get_field (iter, field);
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case MU_MSG_FIELD_TYPE_INT:
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if (mu_msg_field_id(field) == MU_MSG_FIELD_ID_PRIORITY) {
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val = mu_msg_iter_xapian_get_field_numeric (iter, field);
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return mu_msg_str_prio ((MuMsgPriority)val);
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}
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if (mu_msg_field_id(field) == MU_MSG_FIELD_ID_FLAGS) {
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val = mu_msg_iter_xapian_get_field_numeric (iter, field);
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return mu_msg_str_flags_s ((MuMsgPriority)val);
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}
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return mu_msg_iter_xapian_get_field (iter, field); /* as string */
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case MU_MSG_FIELD_TYPE_TIME_T:
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val = mu_msg_iter_xapian_get_field_numeric (iter, field);
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return mu_msg_str_date_s ((time_t)val);
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case MU_MSG_FIELD_TYPE_BYTESIZE:
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val = mu_msg_iter_xapian_get_field_numeric (iter, field);
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return mu_msg_str_size_s ((time_t)val);
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default:
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g_return_val_if_reached (NULL);
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}
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}
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/* returns NULL if there is an error */
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const MuMsgField*
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sort_field_from_string (const char* fieldstr)
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{
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const MuMsgField *field;
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field = mu_msg_field_from_name (fieldstr);
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if (!field && strlen(fieldstr) == 1)
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field = mu_msg_field_from_shortcut(fieldstr[0]);
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if (!field)
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g_printerr ("not a valid sort field: '%s'\n",
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fieldstr);
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return field;
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}
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static gboolean
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print_rows (MuQueryXapian *xapian, const gchar *query, MuConfigOptions *opts)
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{
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MuMsgIterXapian *iter;
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const MuMsgField *sortfield;
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MU_WRITE_LOG ("query: '%s' (iters)", query);
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sortfield = NULL;
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if (opts->sortfield) {
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sortfield = sort_field_from_string (opts->sortfield);
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if (!sortfield) /* error occured? */
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return FALSE;
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}
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iter = mu_query_xapian_run (xapian, query, sortfield,
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!opts->descending,
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0);
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if (!iter) {
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g_printerr ("error: running query failed\n");
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return FALSE;
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} else if (mu_msg_iter_xapian_is_done (iter)) {
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g_printerr ("No matches found\n");
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mu_msg_iter_xapian_destroy (iter);
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return FALSE;
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}
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/* iterate over the found iters */
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do {
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const char* fields = opts->fields;
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int printlen = 0;
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while (*fields) {
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const MuMsgField* field;
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field = mu_msg_field_from_shortcut (*fields);
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if (!field ||
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!mu_msg_field_is_xapian_enabled (field))
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printlen += printf ("%c", *fields);
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else
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printlen +=
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printf ("%s",
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display_field(iter, field));
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++fields;
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}
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if (printlen > 0)
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printf ("\n");
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mu_msg_iter_xapian_next (iter);
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} while (!mu_msg_iter_xapian_is_done (iter));
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mu_msg_iter_xapian_destroy (iter);
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return TRUE;
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}
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static gboolean
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do_output_text (MuQueryXapian *xapian, MuConfigOptions* opts,
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const gchar **params)
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{
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gchar *query;
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gboolean retval = TRUE;
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query = mu_query_xapian_combine (params, FALSE);
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/* if xquery is set, we print the xapian query instead of the
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* output; this is for debugging purposes */
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if (opts->xquery)
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retval = print_query (xapian, query);
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else
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retval = print_rows (xapian, query, opts);
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g_free (query);
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return retval;
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}
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/* create a linksdir if it not exist yet; if it already existed,
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* remove old links if opts->clearlinks was specified */
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static gboolean
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create_or_clear_linksdir_maybe (MuConfigOptions* opts)
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{
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if (access (opts->linksdir, F_OK) != 0) {
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if (!mu_maildir_mkmdir (opts->linksdir, 0700, TRUE))
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return FALSE;
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} else if (opts->clearlinks)
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mu_maildir_clear_links (opts->linksdir);
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return TRUE;
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}
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static gboolean
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do_output_links (MuQueryXapian *xapian, MuConfigOptions* opts,
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const gchar **params)
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{
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gchar *query;
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gboolean retval = TRUE;
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MuMsgIterXapian *iter;
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const MuMsgField *pathfield;
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if (!create_or_clear_linksdir_maybe (opts))
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return FALSE;
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query = mu_query_xapian_combine (params, FALSE);
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MU_WRITE_LOG ("query: '%s' (links)", query);
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iter = mu_query_xapian_run (xapian, query, NULL, FALSE, 0);
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if (!iter) {
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g_printerr ("error: running query failed\n");
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return FALSE;
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} else if (mu_msg_iter_xapian_is_done (iter)) {
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g_printerr ("No matches found\n");
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mu_msg_iter_xapian_destroy (iter);
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return FALSE;
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}
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pathfield = mu_msg_field_from_id (MU_MSG_FIELD_ID_PATH);
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/* iterate over the found iters */
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for (; !mu_msg_iter_xapian_is_done (iter);
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mu_msg_iter_xapian_next (iter)) {
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const char *path;
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path = mu_msg_iter_xapian_get_field (iter, pathfield);
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if (!path)
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continue;
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/* this might happen if the database is not up-to-date */
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if (access (path, R_OK) != 0) {
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g_warning ("Cannot read source message %s: %s",
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path, strerror (errno));
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continue;
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}
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if (!mu_maildir_link (path, opts->linksdir))
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break;
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}
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mu_msg_iter_xapian_destroy (iter);
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g_free (query);
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return retval;
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}
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static gboolean
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query_params_valid (MuConfigOptions *opts)
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{
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if (opts->linksdir)
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if (opts->xquery) {
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g_warning ("Invalid option for '--linksdir'");
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return FALSE;
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}
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if (!opts->params[0] || !opts->params[1]) {
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g_warning ("Missing search expression");
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return FALSE;
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}
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if (mu_util_check_dir (opts->xpath, TRUE, FALSE))
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return TRUE;
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g_warning ("%s is not a readable Xapian directory", opts->xpath);
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g_message ("Did you run 'mu index'?");
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return FALSE;
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}
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gboolean
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mu_cmd_find (MuConfigOptions *opts)
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{
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MuQueryXapian *xapian;
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gboolean rv;
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const gchar **params;
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g_return_val_if_fail (opts, FALSE);
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if (!query_params_valid (opts))
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return FALSE;
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if (mu_util_xapian_db_is_empty (opts->xpath)) {
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g_warning ("The database is empty; "
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"use 'mu index' to add some messages");
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return FALSE;
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}
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if (!mu_util_xapian_db_version_up_to_date (opts->xpath)) {
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update_warning ();
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return FALSE;
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}
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/* first param is 'query', search params are after that */
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params = (const gchar**)&opts->params[1];
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mu_msg_gmime_init();
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xapian = mu_query_xapian_new (opts->xpath);
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if (!xapian) {
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g_warning ("Failed to create Xapian query");
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mu_msg_gmime_uninit ();
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return FALSE;
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}
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if (opts->linksdir)
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rv = do_output_links (xapian, opts, params);
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else
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rv = do_output_text (xapian, opts, params);
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mu_query_xapian_destroy (xapian);
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mu_msg_gmime_uninit();
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return rv;
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}
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