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>
*
* 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 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 <purple.h> may be included directly"
#endif
#ifndef PURPLE_PROTOCOL_CHAT_H
#define PURPLE_PROTOCOL_CHAT_H
/**
* SECTION:purpleprotocolchat
* @section_id: libpurple-purpleprotocolchat
* @short_description: Protocol Chat Interface
* @title: ProtocolChat Interface
*
* #PurpleProtocolChat describes the API that protocols need to implement for
* handling multiple user conversations.
*/
#include <glib.h>
#include <glib-object.h>
#include <libpurple/connection.h>
#include <libpurple/purplemessage.h>
#include <libpurple/protocol.h>
/**
* PURPLE_TYPE_PROTOCOL_CHAT:
*
* The standard _TYPE_ macro for #PurpleProtocolChat.
*
* Since: 3.0.0
*/
#define PURPLE_TYPE_PROTOCOL_CHAT (purple_protocol_chat_get_type())
/**
* purple_protocol_chat_get_type:
*
* Gets the #GType for #PurpleProtocolChat.
*
* Returns: The #GType for #PurpleProtocolChat.
*
* Since: 3.0.0
*/
/**
* PurpleProtocolChat:
*
* An opaque representation of an object that implements
* #PurpleProtocolChatInterface.
*
* Since: 3.0.0
*/
G_DECLARE_INTERFACE(PurpleProtocolChat, purple_protocol_chat, PURPLE,
PROTOCOL_CHAT, PurpleProtocol)
G_BEGIN_DECLS
/**
* PurpleProtocolChatInterface:
* @info: Returns a list of #PurpleProtocolChatEntry structs, which represent
* information required by the protocol to join a chat. libpurple will
* call join_chat along with the information filled by the user.
* @info_defaults: Returns a hashtable which maps #PurpleProtocolChatEntry
* struct identifiers to default options as strings based on
* @chat_name. The resulting hashtable should be created with
* #g_hash_table_new_full(#g_str_hash, #g_str_equal, %NULL,
* #g_free). Use @get_name if you instead need to extract a chat
* name from a hashtable.
* @join: Called when the user requests joining a chat. Should arrange for
* purple_serv_got_joined_chat() to be called.
* @reject: Called when the user refuses a chat invitation.
* @get_name: Returns a chat name based on the information in components. Use
* @info_defaults if you instead need to generate a hashtable from a
* chat name.
* @invite: Invite a user to join a chat.
* @leave: Called when the user requests leaving a chat.
* @send: Send a message to a chat.
* @get_user_real_name: Gets the real name of a participant in a chat. For
* example, on XMPP this turns a chat room nick
* <literal>foo</literal> into
* <literal>room\@server/foo</literal>.
* @set_topic: Called to set the topic for the given chat.
*
* The protocol chat interface.
*
* This interface provides callbacks needed by protocols that implement chats.
*/
struct _PurpleProtocolChatInterface {
/*< private >*/
GTypeInterface parent;
/*< public >*/
GList *(*info)(PurpleProtocolChat *protocol_chat, PurpleConnection *connection);
GHashTable *(*info_defaults)(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, const gchar *chat_name);
void (*join)(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, GHashTable *components);
void (*reject)(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, GHashTable *components);
gchar *(*get_name)(PurpleProtocolChat *protocol_chat, GHashTable *components);
void (*invite)(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, gint id, const gchar *message, const gchar *who);
void (*leave)(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, gint id);
gint (*send)(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, gint id, PurpleMessage *message);
gchar *(*get_user_real_name)(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, gint id, const gchar *who);
void (*set_topic)(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, gint id, const gchar *topic);
/*< private >*/
gpointer reserved[8];
};
/**
* purple_protocol_chat_info:
* @protocol_chat: The #PurpleProtocolChat instance.
* @connection: The #PurpleConnection instance.
*
* Gets the list of #PurpleProtocolChatEntry's that are required to join a
* multi user chat.
*
* Returns: (transfer full) (element-type PurpleProtocolChatEntry): The list
* of #PurpleProtocolChatEntry's that are used to join a chat.
*
* Since: 3.0.0
*/
GList *purple_protocol_chat_info(PurpleProtocolChat *protocol_chat, PurpleConnection *connection);
/**
* purple_protocol_chat_info_defaults:
* @protocol_chat: The #PurpleProtocolChat instance.
* @connection: The #PurpleConnection instance.
* @chat_name: The name of the chat.
*
* Returns a #GHashTable of the default protocol dependent components that will
* be passed to purple_protocol_chat_join().
*
* Returns: (transfer full) (element-type utf8 utf8): The values that will be
* used to join the chat.
*
* Since: 3.0.0
*/
GHashTable *purple_protocol_chat_info_defaults(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, const gchar *chat_name);
/**
* purple_protocol_chat_join:
* @protocol_chat: The #PurpleProtocolChat instance.
* @connection: The #PurpleConnection instance.
* @components: (element-type utf8 utf8) (transfer none): The protocol
* dependent join components.
*
* Joins the chat described in @components.
*
* Since: 3.0.0
*/
void purple_protocol_chat_join(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, GHashTable *components);
/**
* purple_protocol_chat_reject:
* @protocol_chat: The #PurpleProtocolChat instance.
* @connection: The #PurpleConnection instance.
* @components: (element-type utf8 utf8) (transfer none): The protocol
* dependent join components.
*
* Used to reject a chat invite.
*
* Since: 3.0.0
*/
void purple_protocol_chat_reject(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, GHashTable *components);
/**
* purple_protocol_chat_get_name:
* @protocol_chat: The #PurpleProtocolChat instance.
* @components: (element-type utf8 utf8) (transfer none): The protocol
* dependent join components.
*
* Gets the name from @components.
*
* Returns: (transfer full): The chat name from @components.
*
* Since: 3.0.0
*/
gchar *purple_protocol_chat_get_name(PurpleProtocolChat *protocol_chat, GHashTable *components);
/**
* purple_protocol_chat_invite:
* @protocol_chat: The #PurpleProtocolChat instance.
* @connection: The #PurpleConnection instance.
* @id: The id of the chat.
* @message: The invite message.
* @who: The target of the invite.
*
* Sends an invite to @who with @message.
*
* Since: 3.0.0
*/
void purple_protocol_chat_invite(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, gint id, const gchar *message, const gchar *who);
/**
* purple_protocol_chat_leave:
* @protocol_chat: The #PurpleProtocolChat instance.
* @connection: The #PurpleConnection instance.
* @id: The id of the chat.
*
* Leaves the chat identified by @id.
*
* Since: 3.0.0
*/
void purple_protocol_chat_leave(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, gint id);
/**
* purple_protocol_chat_send:
* @protocol_chat: The #PurpleProtocolChat instance.
* @connection: The #PurpleConnection instance.
* @id: The id of the chat.
* @message: The message to send.
*
* Sends @message to the chat identified by @id.
*
* Returns: 0 on success, non-zero on failure.
*
* Since: 3.0.0
*/
gint purple_protocol_chat_send(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, gint id, PurpleMessage *message);
/**
* purple_protocol_chat_get_user_real_name:
* @protocol_chat: The #PurpleProtocolChat instance.
* @connection: The #PurpleConnection instance.
* @id: The id of the chat.
* @who: The username.
*
* Gets the real name of @who.
*
* Returns: (transfer full): The realname of @who.
*
* Since: 3.0.0
*/
gchar *purple_protocol_chat_get_user_real_name(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, gint id, const gchar *who);
/**
* purple_protocol_chat_set_topic:
* @protocol_chat: The #PurpleProtocolChat instance.
* @connection: The #PurpleConnection instance.
* @id: The id of the chat.
* @topic: The new topic.
*
* Sets the topic for the chat with id @id to @topic.
*
* Since: 3.0.0
*/
void purple_protocol_chat_set_topic(PurpleProtocolChat *protocol_chat, PurpleConnection *connection, gint id, const gchar *topic);
G_END_DECLS
#endif /* PURPLE_PROTOCOL_CHAT_H */