feature: /ignore command

Like it's already implemented in irc plugin, this commit adds the /ignore command. Now you can filter messages in group chats to not be shown, based on a part of Tox ID. The ignore list of IDs is manageable in this way:
[tox]  /ignore  list
                add <ID part>
                del <ID part>

ommit messages from people with certain Tox IDs

list: show the list of ignores
add: add an ID to the list
del: delete an ID from the list

src/twc-chat.c

@@ -280,6 +280,51 @@ twc_chat_search_buffer(struct t_gui_buffer *buffer)
     return NULL;
 }
 
+/**
+ * Set a prefix to a nickname in the nicklist of a chat.
+ */
+void
+twc_chat_update_prefix(struct t_twc_chat *chat, const char *id,
+                       const char *prefix, const char *prefix_color)
+{
+    struct t_gui_nick_group *ptr_group = NULL;
+    struct t_gui_nick *ptr_nick = NULL;
+
+    weechat_nicklist_get_next_item(chat->buffer, &ptr_group, &ptr_nick);
+    while (ptr_group || ptr_nick)
+    {
+        if (ptr_nick)
+        {
+            const char *name_field = weechat_nicklist_nick_get_string(
+                chat->buffer, ptr_nick, "name");
+            if (!weechat_strncasecmp(id, name_field + sizeof(char), strlen(id)))
+            {
+                weechat_nicklist_nick_set(chat->buffer, ptr_nick,
+                                          "prefix", prefix);
+                weechat_nicklist_nick_set(chat->buffer, ptr_nick,
+                                          "prefix_color", prefix_color);
+                weechat_nicklist_nick_set(chat->buffer, ptr_nick, "color",
+                                          "default");
+                return;
+            }
+        }
+        weechat_nicklist_get_next_item(chat->buffer, &ptr_group, &ptr_nick);
+    }
+}
+
+/**
+ * Update prefix for a certain nickname structure pointer.
+ */
+void
+twc_chat_update_prefix_by_nick(struct t_gui_buffer *buffer,
+                               struct t_gui_nick *nick, const char *prefix,
+                               const char *prefix_color)
+{
+    weechat_nicklist_nick_set(buffer, nick, "prefix", prefix);
+    weechat_nicklist_nick_set(buffer, nick, "prefix_color", prefix_color);
+    weechat_nicklist_nick_set(buffer, nick, "color", "default");
+}
+
 /**
  * Print a chat message to a chat's buffer.
  */

src/twc-chat.h

@@ -56,6 +56,15 @@ twc_chat_search_group(struct t_twc_profile *profile, int32_t group_number,
 struct t_twc_chat *
 twc_chat_search_buffer(struct t_gui_buffer *target_buffer);
 
+void
+twc_chat_update_prefix(struct t_twc_chat *chat, const char *id,
+                       const char *prefix, const char *prefix_color);
+
+void
+twc_chat_update_prefix_by_nick(struct t_gui_buffer *buffer,
+                               struct t_gui_nick *nick, const char *prefix,
+                               const char *prefix_color);
+
 enum t_twc_rc
 twc_chat_set_logging(struct t_twc_chat const *const chat, bool logging);
 

src/twc-commands.c

@@ -1381,6 +1381,102 @@ twc_input_complete(const void *pointer, void *data, struct t_gui_buffer *buffer,
     }
     return WEECHAT_RC_OK;
 }
+/**
+ * Update a certain nick's prefix in all opened group chats
+ */
+void
+twc_name_prefix_in_groupchats(struct t_twc_profile *profile, const char *id,
+                              const char *prefix, const char *prefix_color)
+{
+    struct t_twc_list_item *item;
+    struct t_twc_chat *chat;
+    size_t index;
+    twc_list_foreach (profile->chats, index, item)
+    {
+        chat = (struct t_twc_chat *)(item->chat);
+        if ((chat->group_number) >= 0)
+        {
+            twc_chat_update_prefix(chat, id, prefix, prefix_color);
+        }
+    }
+}
+
+/**
+ *  Command /ignore callback.
+ */
+int
+twc_cmd_ignore(const void *pointer, void *data, struct t_gui_buffer *buffer,
+               int argc, char **argv, char **argv_eol)
+{
+    struct t_twc_profile *profile = twc_profile_search_buffer(buffer);
+    TWC_CHECK_PROFILE(profile);
+    TWC_CHECK_PROFILE_LOADED(profile);
+
+    /* list ignores */
+    if ((argc == 1) ||
+        ((argc == 2) && (weechat_strcasecmp(argv[1], "list") == 0)))
+    {
+        if (!weechat_list_size(profile->ignores))
+        {
+            weechat_printf(profile->buffer, "ignore list is empty");
+            return WEECHAT_RC_OK;
+        }
+        weechat_printf(profile->buffer, "ignore list:");
+        size_t i = 0;
+        struct t_weelist_item *item;
+        for (item = weechat_list_get(profile->ignores, 0); item;
+             item = weechat_list_next(item))
+        {
+            weechat_printf(profile->buffer, "  [%d] %s", i,
+                           weechat_list_string(item));
+            i++;
+        }
+        return WEECHAT_RC_OK;
+    }
+    /* add ignore */
+
+    const char *id = argv_eol[2];
+    struct t_weelist_item *item;
+    item = weechat_list_casesearch(profile->ignores, id);
+
+    if (weechat_strcasecmp(argv[1], "add") == 0)
+    {
+        WEECHAT_COMMAND_MIN_ARGS(3, "add");
+        if (!item)
+        {
+            weechat_list_add(profile->ignores, id, WEECHAT_LIST_POS_END, NULL);
+            weechat_printf(profile->buffer,
+                           "%sID '%s' has been added to the ignore list",
+                           weechat_prefix("action"), id);
+            twc_name_prefix_in_groupchats(profile, id, "-", "yellow");
+        }
+        else
+            weechat_printf(profile->buffer,
+                           "%sID '%s' is already in the ignore list",
+                           weechat_prefix("error"), id);
+        return WEECHAT_RC_OK;
+    }
+
+    /* delete ignore */
+    if (weechat_strcasecmp(argv[1], "del") == 0)
+    {
+        WEECHAT_COMMAND_MIN_ARGS(3, "del");
+        if (item)
+        {
+            weechat_list_remove(profile->ignores, item);
+            weechat_printf(profile->buffer,
+                           "%sID '%s' has been deleted from the ignore list",
+                           weechat_prefix("action"), id);
+            twc_name_prefix_in_groupchats(profile, id, " ", "default");
+        }
+        else
+            weechat_printf(profile->buffer,
+                           "%sthere's no ID '%s' in the ignore list",
+                           weechat_prefix("error"), id);
+        return WEECHAT_RC_OK;
+    }
+    return WEECHAT_RC_ERROR;
+}
 
 /**
  * Register Tox-WeeChat commands.
@@ -1519,4 +1615,16 @@ twc_commands_init()
         "%(filename)"
         " || %(tox_friend_name)|%(tox_friend_tox_id) %(filename)",
         twc_cmd_send, NULL, NULL);
+    weechat_hook_command("ignore",
+                         "ommit messages from people with certain Tox IDs",
+                         "list"
+                         " || add <ID part>"
+                         " || del <ID part>",
+                         "list: show the list of ignores\n"
+                         "add: add an ID to the list\n"
+                         "del: delete an ID from the list\n",
+                         "list"
+                         " || add %*"
+                         " || del %*",
+                         twc_cmd_ignore, NULL, NULL);
 }

src/twc-config.c

@@ -35,6 +35,7 @@ struct t_config_file *twc_config_file = NULL;
 struct t_config_section *twc_config_section_look = NULL;
 struct t_config_section *twc_config_section_profile = NULL;
 struct t_config_section *twc_config_section_profile_default = NULL;
+struct t_config_section *twc_config_section_ignore = NULL;
 
 struct t_config_option *twc_config_friend_request_message;
 struct t_config_option *twc_config_short_id_size;
@@ -207,6 +208,80 @@ twc_config_profile_change_callback(const void *pointer, void *data,
     }
 }
 
+/*
+ * Reads ignore option from configuration file.
+ *
+ * Returns:
+ *   1: OK
+ *   0: error
+ */
+int
+twc_config_ignore_read_callback(const void *pointer, void *data,
+                                struct t_config_file *config_file,
+                                struct t_config_section *section,
+                                const char *option_name, const char *value)
+{
+    /* make C compiler happy */
+    (void)pointer;
+    (void)data;
+    (void)config_file;
+    (void)section;
+    if (option_name)
+    {
+        char *profile_name = strrchr(option_name, '.');
+        if (profile_name)
+        {
+            profile_name = strndup(option_name,
+                                   (profile_name - option_name) / sizeof(char));
+            struct t_twc_profile *profile =
+                twc_profile_search_name(profile_name);
+            if (profile)
+            {
+                weechat_list_add(profile->ignores, value, WEECHAT_LIST_POS_END,
+                                 NULL);
+            }
+            free(profile_name);
+        }
+    }
+    return 1;
+}
+
+/*
+ * Writes ignore section in tox configuration file.
+ */
+int
+twc_config_ignore_write_callback(const void *pointer, void *data,
+                                 struct t_config_file *config_file,
+                                 const char *section_name)
+{
+    /* make C compiler happy */
+    (void)pointer;
+    (void)data;
+
+    if (!weechat_config_write_line(config_file, section_name, NULL))
+        return WEECHAT_CONFIG_WRITE_ERROR;
+
+    struct t_twc_list_item *item;
+    size_t index;
+    twc_list_foreach (twc_profiles, index, item)
+    {
+        size_t option_name_len =
+            strlen(item->profile->name) + strlen(".ignore") + 1;
+        char option_name[option_name_len];
+        snprintf(option_name, option_name_len - 1, "%s.ignore",
+                 item->profile->name);
+        struct t_weelist_item *ignore_item;
+        for (ignore_item = weechat_list_get(item->profile->ignores, 0);
+             ignore_item; ignore_item = weechat_list_next(ignore_item))
+        {
+            if (!weechat_config_write_line(config_file, option_name,
+                                           weechat_list_string(ignore_item)))
+                return WEECHAT_CONFIG_WRITE_ERROR;
+        }
+    }
+    return WEECHAT_CONFIG_WRITE_OK;
+}
+
 /**
  * Create a new option for a profile. Returns NULL if an error occurs.
  */
@@ -351,6 +426,12 @@ twc_config_init()
         twc_config_file, "profile_default", 0, 0, NULL, NULL, NULL, NULL, NULL,
         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
 
+    twc_config_section_ignore = weechat_config_new_section(
+        twc_config_file, "ignore", 0, 0, twc_config_ignore_read_callback, NULL,
+        NULL, twc_config_ignore_write_callback, NULL, NULL,
+        twc_config_ignore_write_callback, NULL, NULL, NULL, NULL, NULL, NULL,
+        NULL, NULL);
+
     for (int i = 0; i < TWC_PROFILE_NUM_OPTIONS; ++i)
     {
         twc_config_profile_default[i] =

src/twc-profile.c

@@ -166,6 +166,7 @@ twc_profile_new(const char *name)
     profile->tox_online = false;
 
     profile->chats = twc_list_new();
+    profile->ignores = weechat_list_new();
     profile->friend_requests = twc_list_new();
     profile->group_chat_invites = twc_list_new();
     profile->message_queues = weechat_hashtable_new(
@@ -247,10 +248,10 @@ twc_tox_new_print_error(struct t_twc_profile *profile,
                            weechat_prefix("error"), options->proxy_host);
             break;
         case TOX_ERR_NEW_PROXY_BAD_PORT:
-            weechat_printf(profile->buffer,
-                           "%scould not load Tox (invalid proxy port: \"%"
-                           PRIu16 "\")",
-                           weechat_prefix("error"), options->proxy_port);
+            weechat_printf(
+                profile->buffer,
+                "%scould not load Tox (invalid proxy port: \"%" PRIu16 "\")",
+                weechat_prefix("error"), options->proxy_port);
             break;
         case TOX_ERR_NEW_PROXY_NOT_FOUND:
             weechat_printf(
@@ -698,6 +699,8 @@ twc_profile_free(struct t_twc_profile *profile)
 
     /* free things */
     twc_chat_free_list(profile->chats);
+    weechat_list_remove_all(profile->ignores);
+    weechat_list_free(profile->ignores);
     twc_friend_request_free_list(profile->friend_requests);
     twc_group_chat_invite_free_list(profile->group_chat_invites);
     twc_tfer_free(profile->tfer);

src/twc-profile.h

@@ -59,6 +59,7 @@ struct t_twc_profile
     struct t_hook *tox_do_timer;
 
     struct t_twc_list *chats;
+    struct t_weelist *ignores;
     struct t_twc_list *friend_requests;
     struct t_twc_list *group_chat_invites;
     struct t_hashtable *message_queues;

src/twc-tox-callbacks.c

@@ -408,13 +408,18 @@ twc_handle_group_message(Tox *tox, int32_t group_number, int32_t peer_number,
     bool rc;
     struct t_twc_profile *profile = data;
 
+    char *short_id =
+        twc_get_peer_id_short(profile->tox, group_number, peer_number);
+    if (twc_is_id_ignored(profile, short_id))
+    {
+        free(short_id);
+        return;
+    }
     struct t_twc_chat *chat =
         twc_chat_search_group(profile, group_number, true);
 
     char *myname = twc_get_self_name_nt(profile->tox);
     char *name = twc_get_peer_name_nt(profile->tox, group_number, peer_number);
-    char *short_id =
-        twc_get_peer_id_short(profile->tox, group_number, peer_number);
     char *full_name = twc_get_peer_name_prefixed(short_id, name);
     char *tags = "notify_message";
     char *message_nt = twc_null_terminate(message, length);
@@ -526,6 +531,12 @@ twc_group_peer_list_changed_callback(Tox *tox, uint32_t group_number,
             char *full_name = twc_get_peer_name_prefixed(short_id, name);
             weechat_nicklist_add_nick(chat->buffer, chat->nicklist_group,
                                       full_name, NULL, NULL, NULL, 1);
+            nick = weechat_nicklist_search_nick(
+                chat->buffer, chat->nicklist_group, full_name);
+            bool ignored = twc_is_id_ignored(profile, short_id);
+            twc_chat_update_prefix_by_nick(chat->buffer, nick,
+                                           ignored ? "-" : " ",
+                                           ignored ? "yellow" : "default");
             weechat_printf(
                 chat->buffer, "%s%s just joined the group chat",
                 weechat_prefix("join"),

src/twc-utils.c

@@ -276,6 +276,23 @@ twc_get_next_completion(struct t_weelist *completion_list,
     return comp;
 }
 
+/**
+ * Checks if an ID is ignored.
+ */
+bool
+twc_is_id_ignored(struct t_twc_profile *profile, const char *short_id)
+{
+    struct t_weelist_item *ignore_item;
+    for (ignore_item = weechat_list_get(profile->ignores, 0); ignore_item;
+         ignore_item = weechat_list_next(ignore_item))
+    {
+        if (!weechat_strncasecmp(short_id, weechat_list_string(ignore_item),
+                                 strlen(weechat_list_string(ignore_item))))
+            return true;
+    }
+    return false;
+}
+
 /**
  * reverse the bytes of a 32-bit integer.
  */