pidgin/pidgin

GSoC History API including sqlite history adapter

2021-10-12, James Culver
741992355ead
GSoC History API including sqlite history adapter

The History API has been created to drive all message handling in purple3. It will be used to update existing messages for edits, reactions, pinning, read/deliver receipts, etc. The API uses an adapter pattern, to abstract out backends, but provides a SQLite3 backend by default.

It also provides search capabilities using a custom query language that can easily be expanded over time. It will be use by both the end user to search messages and the frontends to implement features like a pinned messages button. A command line utility is also provided for searching outside of the program itself.

## Remaining Items

**These all will most likely be done by the Pidgin core team after GSoC when we figure out exactly how to solve them.**

Need to store database in purple config directory
* Gary has spent some time looking at this and it looks like the purple-history cli will need to become a purple-ui to make this work write as in the future other adapters will be plugins.

Other things to consider:
- For simplicity, the SqliteHistoryAdapter is parsing the query itself, but for consistency having `PurpleHistoryAdapter` parse the query and pass tokens to the subclass might be something we want to do.

Testing Done:
## Unit Tests
History Manager
History Adapter

## Integration Tests
purplehistorycore created for integration tests.
PurpleSqliteHistoryAdapter functionality tested:
- Creates proper db schema
- Writes logs
- Reads logs
- Queries using query language
- Deletes using query language

Bugs closed: PIDGIN-17526, PIDGIN-17532, PIDGIN-17533, PIDGIN-17534

Reviewed at https://reviews.imfreedom.org/r/877/
/*
* Purple - Internet Messaging Library
* Copyright (C) Pidgin Developers <devel@pidgin.im>
*
* This program 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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#if !defined(PURPLE_GLOBAL_HEADER_INSIDE) && !defined(PURPLE_COMPILATION)
# error "only <pidgin.h> may be included directly"
#endif
#ifndef PURPLE_PROTOCOL_MANAGER_H
#define PURPLE_PROTOCOL_MANAGER_H
#include <glib.h>
#include <glib-object.h>
#include "protocol.h"
G_BEGIN_DECLS
/**
* SECTION:purpleprotocolmanager
* @section_id: libpurple-purpleprotocolmanager
* @title: Purple Protocol Manager
* @short_description: Management of protocols.
*
* #PurpleProtocolManager keeps track of all protocols and emits signals when
* protocols are registered and unregistered.
*/
/**
* PURPLE_PROTOCOL_MANAGER_DOMAIN:
*
* A #GError domain for errors from #PurpleProtocolManager.
*
* Since: 3.0.0
*/
#define PURPLE_PROTOCOL_MANAGER_DOMAIN (g_quark_from_static_string("purple-protocol-manager"))
/**
* PURPLE_TYPE_PROTOCOL_MANAGER:
*
* The standard _get_type macro for #PurpleProtocolManager.
*/
#define PURPLE_TYPE_PROTOCOL_MANAGER (purple_protocol_manager_get_type())
G_DECLARE_DERIVABLE_TYPE(PurpleProtocolManager, purple_protocol_manager,
PURPLE, PROTOCOL_MANAGER, GObject)
/**
* PurpleProtocolManager:
*
* An opaque data structure that manages protocols.
*
* Since: 3.0.0
*/
/**
* PurpleProtocolManagerClass:
* @registered: The default signal handler for when a protocol is registered.
* @unregistered: The default signal handler for when a protocol is
* unregistered.
*
* The class structure for #PurpleProtocolManager.
*
* Since: 3.0.0
*/
struct _PurpleProtocolManagerClass {
/*< private >*/
GObjectClass parent;
/*< public >*/
void (*registered)(PurpleProtocolManager *manager, PurpleProtocol *protocol);
void (*unregistered)(PurpleProtocolManager *manager, PurpleProtocol *protocol);
/*< private >*/
gpointer reserved[4];
};
/**
* PurpleProtocolManagerForeachFunc:
* @protocol: The #PurpleProtocol instance.
* @data: User supplied data.
*
* A function to be used as a callback with purple_protocol_manager_foreach().
*
* Since: 3.0.0
*/
typedef void (*PurpleProtocolManagerForeachFunc)(PurpleProtocol *protocol, gpointer data);
/**
* purple_protocol_manager_get_default:
*
* Gets the default #PurpleProtocolManager instance.
*
* Returns: (transfer none): The default #PurpleProtocolManager instance.
*
* Since: 3.0.0
*/
PurpleProtocolManager *purple_protocol_manager_get_default(void);
/**
* purple_protocol_manager_register:
* @manager: The #PurpleProtocolManager instance.
* @protocol: The #PurpleProtocol to register.
* @error: (out) (optional) (nullable): A return address for a #GError.
*
* Registers @protocol with @manager.
*
* Returns: %TRUE if @protocol was successfully registered with @manager,
* %FALSE otherwise.
*
* Since: 3.0.0
*/
gboolean purple_protocol_manager_register(PurpleProtocolManager *manager, PurpleProtocol *protocol, GError **error);
/**
* purple_protocol_manager_unregister:
* @manager: The #PurpleProtocolManager instance.
* @protocol: The #PurpleProtocol to unregister.
* @error: (out) (optional) (nullable): A return address for a #GError.
*
* Unregisters @protocol from @manager.
*
* Returns: %TRUE if @protocol was successfully unregistered from @manager,
* %FALSE otherwise.
*
* Since: 3.0.0
*/
gboolean purple_protocol_manager_unregister(PurpleProtocolManager *manager, PurpleProtocol *protocol, GError **error);
/**
* purple_protocol_manager_find:
* @manager: The #PurpleProtocolManager instance.
* @id: The id of the #PurpleProtocol to find.
*
* Gets the #PurpleProtocol identified by @id if found, otherwise %NULL.
*
* Returns: (transfer none): The #PurpleProtocol identified by @id or %NULL.
*
* Since: 3.0.0
*/
PurpleProtocol *purple_protocol_manager_find(PurpleProtocolManager *manager, const gchar *id);
/**
* purple_protocol_manager_foreach:
* @manager: The #PurpleProtocolManager instance.
* @func: (scope call): The #PurpleProtocolManagerForeachFunc to call.
* @data: User data to pass to @func.
*
* Calls @func for each #PurpleProtocol that @manager knows about.
*
* Since: 3.0.0
*/
void purple_protocol_manager_foreach(PurpleProtocolManager *manager, PurpleProtocolManagerForeachFunc func, gpointer data);
/**
* purple_protocol_manager_get_all:
* @manager: The #PurpleProtocolManager instance.
*
* Gets a sorted list of all #PurpleProtocols that are currently registered in
* @manager.
*
* Returns: (transfer container) (element-type PurpleProtocol): The list
* containing all of the #PurpleProtocols registered with @manager.
*
* Since: 3.0.0
*/
GList *purple_protocol_manager_get_all(PurpleProtocolManager *manager);
G_END_DECLS
#endif /* PURPLE_PROTOCOL_MANAGER_H */