PoC for bookmark ignore

```
~/.local/share/profanity % cat bookmark_ignore
[ignore]
profanity@rooms.dismail.de=
```

Regards https://github.com/profanity-im/profanity/issues/1115

2 files changed, 127 insertions, 0 deletions

diff --git a/src/tools/bookmark_ignore.c b/src/tools/bookmark_ignore.c
new file mode 100644
index 00000000..18dfb869
--- /dev/null
+++ b/src/tools/bookmark_ignore.c
@@ -0,0 +1,86 @@
+/*
+ * bookmark_ignore.c
+ * vim: expandtab:ts=4:sts=4:sw=4
+ *
+ * Copyright (C) 2020 Michael Vetter <jubalh@iodoru.org>
+ *
+ * This file is part of Profanity.
+ *
+ * Profanity 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.
+ *
+ * Profanity 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 Profanity.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link the code of portions of this program with the OpenSSL library under
+ * certain conditions as described in each individual source file, and
+ * distribute linked combinations including the two.
+ *
+ * You must obey the GNU General Public License in all respects for all of the
+ * code used other than OpenSSL. If you modify file(s) with this exception, you
+ * may extend this exception to your version of the file(s), but you are not
+ * obligated to do so. If you do not wish to do so, delete this exception
+ * statement from your version. If you delete this exception statement from all
+ * source files in the program, then also delete it here.
+ *
+ */
+
+#include "config.h"
+
+#include <glib.h>
+#include <glib/gstdio.h>
+#include <stdlib.h>
+#include "config/files.h"
+#include "config/preferences.h"
+
+#include "log.h"
+
+static gchar**
+bookmark_ignore_get_list(gsize *len)
+{
+    char *bi_loc;
+    GKeyFile *bi;
+
+    bi_loc = files_get_data_path(FILE_BOOKMARK_AUTOJOIN_IGNORE);
+
+    if (g_file_test(bi_loc, G_FILE_TEST_EXISTS)) {
+        g_chmod(bi_loc, S_IRUSR | S_IWUSR);
+    }
+
+    bi = g_key_file_new();
+    g_key_file_load_from_file(bi, bi_loc, G_KEY_FILE_KEEP_COMMENTS, NULL);
+
+    if (!g_key_file_has_group(bi, "ignore")) {
+        return NULL;
+    }
+
+    gchar **keys = g_key_file_get_keys(bi, "ignore"/*PREF_GROUP_ALIAS*/, len, NULL);
+
+    return keys;
+}
+
+gboolean
+bookmark_ignored(Bookmark *bookmark)
+{
+    gsize len;
+    gchar **ignored = bookmark_ignore_get_list(&len);
+    int i;
+
+    for (i=0; i<len; i++) {
+        if (g_strcmp0(bookmark->barejid, ignored[i]) == 0) {
+            g_strfreev(ignored);
+            return TRUE;
+        }
+    }
+
+    g_strfreev(ignored);
+    return FALSE;
+}
diff --git a/src/tools/bookmark_ignore.h b/src/tools/bookmark_ignore.h
new file mode 100644
index 00000000..ea37f0c6
--- /dev/null
+++ b/src/tools/bookmark_ignore.h
@@ -0,0 +1,41 @@
+/*
+ * bookmark_ignore.h
+ * vim: expandtab:ts=4:sts=4:sw=4
+ *
+ * Copyright (C) 2020 Michael Vetter <jubalh@iodoru.org>
+ *
+ * This file is part of Profanity.
+ *
+ * Profanity 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.
+ *
+ * Profanity 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 Profanity.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link the code of portions of this program with the OpenSSL library under
+ * certain conditions as described in each individual source file, and
+ * distribute linked combinations including the two.
+ *
+ * You must obey the GNU General Public License in all respects for all of the
+ * code used other than OpenSSL. If you modify file(s) with this exception, you
+ * may extend this exception to your version of the file(s), but you are not
+ * obligated to do so. If you do not wish to do so, delete this exception
+ * statement from your version. If you delete this exception statement from all
+ * source files in the program, then also delete it here.
+ *
+ */
+
+#ifndef BOOKMARK_IGNORE_H
+#define BOOKMARK_IGNORE_H
+
+gboolean bookmark_ignored(Bookmark *bookmark);
+
+#endif