/*
 * Purple - Internet Messaging Library
 * Copyright (C) Pidgin Developers <devel@pidgin.im>
 *
 * Purple is the legal property of its developers, whose names are too numerous
 * to list here. Please refer to the COPYRIGHT file distributed with this
 * source distribution.
 *
 * This library 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 2 of the License, or (at your option)
 * any later version.
 *
 * This library 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 library; if not, see <https://www.gnu.org/licenses/>.
 */

#if !defined(PURPLE_GLOBAL_HEADER_INSIDE) && !defined(PURPLE_COMPILATION)
# error "only <purple.h> may be included directly"
#endif

#ifndef PURPLE_TAGS_H
#define PURPLE_TAGS_H

#include <glib.h>
#include <gio/gio.h>

#include "purpleversion.h"

#define PURPLE_TYPE_TAGS (purple_tags_get_type())

PURPLE_AVAILABLE_IN_3_0
G_DECLARE_FINAL_TYPE(PurpleTags, purple_tags, PURPLE, TAGS, GObject)

/**
 * PurpleTags:
 *
 * Tags is an object that can be used to keep track of arbitrary tags on
 * objects. Tags are simple strings that use the first ':' to delimit a value.
 * For example: `foo` is a tag with just a name and no value, but `foo:bar` is
 * a tag with a name and value. Also, `foo:` is still considered a name and
 * value, but the value is an empty string.
 *
 * Please note this distinction when the API calls for a name versus a tag
 * which would be the name and the value.
 *
 * Since: 3.0
 */

G_BEGIN_DECLS

/**
 * purple_tags_new:
 *
 * Creates a new tags object.
 *
 * Returns: (transfer full): The new tags object.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
PurpleTags *purple_tags_new(void);

/**
 * purple_tags_exists:
 * @tags: The instance.
 * @tag: The tag data.
 *
 * Checks if @tag exists in @tags.
 *
 * This checks both the tag name and value.
 *
 * Returns: %TRUE if @tag is in @tags, otherwise %FALSE.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
gboolean purple_tags_exists(PurpleTags *tags, const char *tag);

/**
 * purple_tags_lookup:
 * @tags: The instance.
 * @name: The name of the tag to check if it exists.
 * @found: (out) (nullable): A return address for a boolean on whether the tag
 *         was found or not.
 *
 * Gets the value of @name if it exists in @tags.
 *
 * If @found is non %NULL, it will be set to %TRUE if @name was found.
 *
 * Returns: The value of the first tag matching @name. If there is no value,
 *          %NULL is returned.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
const gchar *purple_tags_lookup(PurpleTags *tags, const gchar *name, gboolean *found);

/**
 * purple_tags_get:
 * @tags: The instance.
 * @name: The name of the tag to get.
 *
 * Gets the first tag that matches @name.
 *
 * Returns: The value of the first tag matching @name. If there is no value,
 *          %NULL is returned.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
const gchar *purple_tags_get(PurpleTags *tags, const gchar *name);

/**
 * purple_tags_add:
 * @tags: The instance.
 * @tag: The tag data.
 *
 * Adds @tag to @tags. If the tag already exists, the existing tag will be
 * replaced.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
void purple_tags_add(PurpleTags *tags, const gchar *tag);

/**
 * purple_tags_add_with_value:
 * @tags: The instance.
 * @name: The name of the tag.
 * @value: (nullable): The value of the tag.
 *
 * Formats @name and @value into a tag and adds it to @tags. If the tag already
 * exists, the existing tag will be replaced.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
void purple_tags_add_with_value(PurpleTags *tags, const char *name, const char *value);

/**
 * purple_tags_remove:
 * @tags: The instance.
 * @tag: The tag data.
 *
 * Removes @tag from @tags. Note that this is the tag name and value not just
 * the name.
 *
 * Returns: %TRUE if @tag was found and removed, otherwise %FALSE.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
gboolean purple_tags_remove(PurpleTags *tags, const gchar *tag);

/**
 * purple_tags_remove_with_value:
 * @tags: The instance.
 * @name: The tag name.
 * @value: (nullable): The tag value.
 *
 * A helper function around [method@Tags.remove] that builds the tag variable
 * from @name and @value.
 *
 * Returns: %TRUE if a tag was found and removed, otherwise %FALSE.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
gboolean purple_tags_remove_with_value(PurpleTags *tags, const char *name, const char *value);

/**
 * purple_tags_remove_all:
 * @tags: The instance.
 *
 * Removes all tags from @tags.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
void purple_tags_remove_all(PurpleTags *tags);

/**
 * purple_tags_get_count:
 * @tags: The instance.
 *
 * Gets the number of tags in @tags.
 *
 * Returns: The number of tags that @tags is keeping track of.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
guint purple_tags_get_count(PurpleTags *tags);

/**
 * purple_tags_get_all:
 * @tags: The instance.
 *
 * Gets a list of all the tags.
 *
 * Returns: (transfer none) (element-type utf8): The list of all the tags.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
GList *purple_tags_get_all(PurpleTags *tags);

/**
 * purple_tags_get_all_with_name:
 * @tags: The instance.
 * @name: The name of the tags to get.
 *
 * Gets a list of all tags that are named @name.
 *
 * Returns: (transfer container) (element-type utf8): The list of matching
 *          tags.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
GList *purple_tags_get_all_with_name(PurpleTags *tags, const char *name);

/**
 * purple_tags_to_string:
 * @tags: The instance.
 * @separator: (nullable): A string to separate the items.
 *
 * Creates a @separator delimited string containing each item in @tags.
 *
 * Returns: (transfer full): The string representation.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
gchar *purple_tags_to_string(PurpleTags *tags, const gchar *separator);

/**
 * purple_tag_split:
 * @tag: The tag.
 * @name: (nullable) (optional) (out): An optional return address for the name
 *        of the tag.
 * @value: (nullable) (optional) (out): An optional return address for the
 *         value of the tag.
 *
 * Splits a tag into its name and value parts.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
void purple_tag_split(const char *tag, char **name, char **value);

/**
 * purple_tags_contains:
 * @tags: The instance.
 * @needle: The tags to find.
 *
 * Checks if all of the tags in @needle can be found in @tags.
 *
 * This checks tags, which means names and values, and not just tag names.
 *
 * For example, if @tags contains `foo:bar, baz`, and @needle contains
 * `foo:bar, baz:1` this will return %FALSE because `baz:1` is not in @tags.
 *
 * Returns: %TRUE if all tags in @needle can be found in @tags.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
gboolean purple_tags_contains(PurpleTags *tags, PurpleTags *needle);

G_END_DECLS

#endif /* PURPLE_TAGS_H */
