Initial cut for local provider, to handle mh/mailbox/maildir at

	least.
	Checking in to make a backup.

svn path=/trunk/; revision=6575

1 files changed, 320 insertions, 0 deletions

diff --git a/camel/providers/local/camel-mh-summary.c b/camel/providers/local/camel-mh-summary.c
new file mode 100644
index 0000000000..b6b31664b4
--- /dev/null
+++ b/camel/providers/local/camel-mh-summary.c
@@ -0,0 +1,320 @@
+/*
+ *  Copyright (C) 2000 Helix Code Inc.
+ *
+ *  Authors: Not Zed <notzed@lostzed.mmc.com.au>
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public License
+ *  as published by the Free Software Foundation; either version 2 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 Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public
+ *  License along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "camel-mh-summary.h"
+#include <camel/camel-mime-message.h>
+
+#include <sys/stat.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <sys/types.h>
+#include <dirent.h>
+
+#include <ctype.h>
+
+#define d(x) (printf("%s(%d): ", __FILE__, __LINE__),(x))
+
+#define CAMEL_MH_SUMMARY_VERSION (0x2000)
+
+static CamelMessageInfo *message_info_new(CamelFolderSummary *, struct _header_raw *);
+
+static int mh_summary_check(CamelLocalSummary *cls, CamelFolderChangeInfo *changeinfo, CamelException *ex);
+static int mh_summary_sync(CamelLocalSummary *cls, gboolean expunge, CamelFolderChangeInfo *changeinfo, CamelException *ex);
+/*static int mh_summary_add(CamelLocalSummary *cls, CamelMimeMessage *msg, CamelMessageInfo *info, CamelFolderChangeInfo *, CamelException *ex);*/
+
+static char *mh_summary_next_uid_string(CamelFolderSummary *s);
+
+static void camel_mh_summary_class_init	(CamelMhSummaryClass *class);
+static void camel_mh_summary_init	(CamelMhSummary *gspaper);
+static void camel_mh_summary_finalise	(CamelObject *obj);
+
+#define _PRIVATE(x) (((CamelMhSummary *)(x))->priv)
+
+struct _CamelMhSummaryPrivate {
+	char *current_uid;
+};
+
+static CamelLocalSummaryClass *parent_class;
+
+CamelType
+camel_mh_summary_get_type (void)
+{
+	static CamelType type = CAMEL_INVALID_TYPE;
+	
+	if (type == CAMEL_INVALID_TYPE) {
+		type = camel_type_register(camel_local_summary_get_type (), "CamelMhSummary",
+					   sizeof(CamelMhSummary),
+					   sizeof(CamelMhSummaryClass),
+					   (CamelObjectClassInitFunc)camel_mh_summary_class_init,
+					   NULL,
+					   (CamelObjectInitFunc)camel_mh_summary_init,
+					   (CamelObjectFinalizeFunc)camel_mh_summary_finalise);
+	}
+	
+	return type;
+}
+
+static void
+camel_mh_summary_class_init (CamelMhSummaryClass *class)
+{
+	CamelFolderSummaryClass *sklass = (CamelFolderSummaryClass *) class;
+	CamelLocalSummaryClass *lklass = (CamelLocalSummaryClass *)class;
+
+	parent_class = (CamelLocalSummaryClass *)camel_type_get_global_classfuncs(camel_local_summary_get_type ());
+
+	/* override methods */
+	sklass->message_info_new = message_info_new;
+	sklass->next_uid_string = mh_summary_next_uid_string;
+
+	lklass->check = mh_summary_check;
+	lklass->sync = mh_summary_sync;
+	/*lklass->add = mh_summary_add;*/
+}
+
+static void
+camel_mh_summary_init (CamelMhSummary *o)
+{
+	struct _CamelFolderSummary *s = (CamelFolderSummary *) o;
+
+	o->priv = g_malloc0(sizeof(*o->priv));
+	/* set unique file version */
+	s->version += CAMEL_MH_SUMMARY_VERSION;
+}
+
+static void
+camel_mh_summary_finalise(CamelObject *obj)
+{
+	CamelMhSummary *o = (CamelMhSummary *)obj;
+
+	g_free(o->priv);
+}
+
+/**
+ * camel_mh_summary_new:
+ *
+ * Create a new CamelMhSummary object.
+ * 
+ * Return value: A new #CamelMhSummary object.
+ **/
+CamelMhSummary	*camel_mh_summary_new	(const char *filename, const char *mhdir, ibex *index)
+{
+	CamelMhSummary *o = (CamelMhSummary *)camel_object_new(camel_mh_summary_get_type ());
+
+	camel_local_summary_construct((CamelLocalSummary *)o, filename, mhdir, index);
+	return o;
+}
+
+static CamelMessageInfo *message_info_new(CamelFolderSummary * s, struct _header_raw *h)
+{
+	CamelMessageInfo *mi;
+	/*CamelMhSummary *mhs = (CamelMhSummary *)s;*/
+
+	mi = ((CamelFolderSummaryClass *) parent_class)->message_info_new(s, h);
+	/* hmm, this isn't quite right */
+	if (mi) {
+		/*mi->uid = mh_summary_next_uid_string(s);*/
+	}
+
+	return mi;
+}
+
+static char *mh_summary_next_uid_string(CamelFolderSummary *s)
+{
+	CamelMhSummary *mhs = (CamelMhSummary *)s;
+	CamelLocalSummary *cls = (CamelLocalSummary *)s;
+	int fd = -1;
+	guint32 uid;
+	char *name = NULL;
+
+	/* if we are working to add an existing file, then use current_uid */
+	if (mhs->priv->current_uid)
+		return g_strdup(mhs->priv->current_uid);
+
+	/* else scan for one - and create it too, to make sure */
+	do {
+		g_free(name);
+		close(fd);
+		uid = camel_folder_summary_next_uid(s);
+		name = g_strdup_printf("%s/%u", cls->folder_path, uid);
+		/* O_EXCL isn't guaranteed, sigh.  Oh well, bad luck, mh has problems anyway */
+		fd = open(name, O_WRONLY|O_CREAT|O_EXCL, 0600);
+	} while (fd == -1 && errno == EEXIST);
+
+	close(fd);
+
+	return g_strdup_printf("%u", uid);
+}
+
+static int camel_mh_summary_add(CamelLocalSummary *cls, const char *name, int forceindex)
+{
+	CamelMhSummary *mhs = (CamelMhSummary *)cls;
+	char *filename = g_strdup_printf("%s/%s", cls->folder_path, name);
+	int fd;
+	CamelMimeParser *mp;
+
+	d(printf("summarising: %s\n", name));
+
+	fd = open(filename, O_RDONLY);
+	if (fd == -1) {
+		g_warning("Cannot summarise/index: %s: %s", filename, strerror(errno));
+		g_free(filename);
+		return -1;
+	}
+	mp = camel_mime_parser_new();
+	camel_mime_parser_scan_from(mp, FALSE);
+	camel_mime_parser_init_with_fd(mp, fd);
+	if (cls->index && (forceindex || !ibex_contains_name(cls->index, (char *)name))) {
+		d(printf("forcing indexing of message content\n"));
+		camel_folder_summary_set_index((CamelFolderSummary *)mhs, cls->index);
+	} else {
+		camel_folder_summary_set_index((CamelFolderSummary *)mhs, NULL);
+	}
+	mhs->priv->current_uid = (char *)name;
+	camel_folder_summary_add_from_parser((CamelFolderSummary *)mhs, mp);
+	camel_object_unref((CamelObject *)mp);
+	mhs->priv->current_uid = NULL;
+	camel_folder_summary_set_index((CamelFolderSummary *)mhs, NULL);
+	g_free(filename);
+	return 0;
+}
+
+static void
+remove_summary(char *key, CamelMessageInfo *info, CamelLocalSummary *cls)
+{
+	d(printf("removing message %s from summary\n", key));
+	if (cls->index)
+		ibex_unindex(cls->index, info->uid);
+	camel_folder_summary_remove((CamelFolderSummary *)cls, info);
+}
+
+static int
+mh_summary_check(CamelLocalSummary *cls, CamelFolderChangeInfo *changeinfo, CamelException *ex)
+{
+	DIR *dir;
+	struct dirent *d;
+	char *p, c;
+	CamelMessageInfo *info;
+	GHashTable *left;
+	int i, count;
+	int forceindex;
+
+	/* FIXME: Handle changeinfo */
+
+	d(printf("checking summary ...\n"));
+
+	/* scan the directory, check for mail files not in the index, or index entries that
+	   no longer exist */
+	dir = opendir(cls->folder_path);
+	if (dir == NULL) {
+		camel_exception_setv(ex, 1, "Cannot open MH directory path: %s: %s", cls->folder_path, strerror(errno));
+		return -1;
+	}
+
+	/* keeps track of all uid's that have not been processed */
+	left = g_hash_table_new(g_str_hash, g_str_equal);
+	count = camel_folder_summary_count((CamelFolderSummary *)cls);
+	forceindex = count == 0;
+	for (i=0;i<count;i++) {
+		info = camel_folder_summary_index((CamelFolderSummary *)cls, i);
+		if (info) {
+			g_hash_table_insert(left, info->uid, info);
+		}
+	}
+
+	while ( (d = readdir(dir)) ) {
+		/* FIXME: also run stat to check for regular file */
+		p = d->d_name;
+		while ( (c = *p++) ) {
+			if (!isdigit(c))
+				break;
+		}
+		if (c==0) {
+			info = camel_folder_summary_uid((CamelFolderSummary *)cls, d->d_name);
+			if (info == NULL || (cls->index && (!ibex_contains_name(cls->index, d->d_name)))) {
+				/* need to add this file to the summary */
+				if (info != NULL) {
+					g_hash_table_remove(left, info->uid);
+					camel_folder_summary_remove((CamelFolderSummary *)cls, info);
+				}
+				camel_mh_summary_add(cls, d->d_name, forceindex);
+			} else {
+				g_hash_table_remove(left, info->uid);
+			}
+		}
+	}
+	closedir(dir);
+	g_hash_table_foreach(left, (GHFunc)remove_summary, cls);
+	g_hash_table_destroy(left);
+
+	/* FIXME: move this up a class */
+
+	/* force a save of the index, just to make sure */
+	/* note this could be expensive so possibly shouldn't be here
+	   as such */
+	if (cls->index) {
+		ibex_save(cls->index);
+	}
+
+	return 0;
+}
+
+
+
+/* sync the summary with the ondisk files.
+   It doesnt store the state in the file, the summary only, == MUCH faster */
+static int
+mh_summary_sync(CamelLocalSummary *cls, gboolean expunge, CamelFolderChangeInfo *changes, CamelException *ex)
+{
+	int count, i;
+	CamelMessageInfo *info;
+	char *name;
+
+	d(printf("summary_sync(expunge=%s)\n", expunge?"true":"false"));
+
+	if (cls->index) {
+		ibex_save(cls->index);
+	}
+	if (!expunge)
+		return 0;
+
+	count = camel_folder_summary_count((CamelFolderSummary *)cls);
+	for (i=count-1;i>=0;i--) {
+		info = camel_folder_summary_index((CamelFolderSummary *)cls, i);
+		if (info && info->flags & CAMEL_MESSAGE_DELETED) {
+			name = g_strdup_printf("%s/%s", cls->folder_path, info->uid);
+			d(printf("deleting %s\n", name));
+			if (unlink(name) == 0 || errno==ENOENT) {
+
+				/* FIXME: put this in folder_summary::remove()? */
+				if (cls->index)
+					ibex_unindex(cls->index, info->uid);
+
+				camel_folder_change_info_remove_uid(changes, info->uid);
+				camel_folder_summary_remove((CamelFolderSummary *)cls, info);
+			}
+		}
+	}
+	return 0;
+}
+