core

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 Go to latest Published: Mar 29, 2024 License: Apache-2.0 Imports: 5 Imported by: 0

Documentation

Overview

Package core contains all the tools to make and work with Users and Rooms.

A User is a client who has successfully logged into the server. You can think of clients who are not attached to a User as, for instance, someone in the login screen, but are still connected to the server. A client doesn't have to be a User to be able to call your CustomClientActions, so keep that in mind when making them (Refer to the Usage for CustomClientActions).

Users have their own variables which can be accessed and changed anytime. A User variable can be anything compatible with interface{}, so pretty much anything.

A Room represents a place on the server where a User can join other Users. Rooms can either be public or private. Private Rooms must be assigned an "owner", which is the name of a User, or the ServerName from ServerSettings. The server's name that will be used for ownership of private Rooms can be set with the ServerSettings option ServerName when starting the server. Though keep in mind, setting the ServerName in ServerSettings will prevent a User who wants to go by that name from logging in. Public Rooms will accept a join request from any User, and private Rooms will only accept a join request from someone who is on it's invite list. Only the owner of the Room or the server itself can invite Users to a private Room. But remember, just because a User owns a private room doesn't mean the server cannot also invite to the room via *Room.AddInvite() function.

Rooms have their own variables which can be accessed and changed anytime. Like User variables, a Room variable can be anything compatible with interface{}.

Index

Constants

View Source 
const (
	MessageTypeChat = iota
	MessageTypeServer
)

These represent the types of room messages the server sends.

View Source 
const (
	ServerMessageGame = iota
	ServerMessageNotice
	ServerMessageImportant
)

These are the sub-types that a MessageTypeServer will come with. Ordered by their visible priority for your UI.

View Source 
const (
	StatusAvailable = iota // User is available
	StatusInGame           // User is in a game
	StatusIdle             // User is idle
	StatusOffline          // User is offline
)

These represent the four statuses a User could be.

Variables

View Source 
var (

	// LoginCallback is only for internal Gopher Game Server mechanics.
	LoginCallback func(string, int, map[string]interface{}, map[string]interface{}) bool
	// LogoutCallback is only for internal Gopher Game Server mechanics.
	LogoutCallback func(string, int)
)

Functions

func AutoLogIn 

func AutoLogIn(tag string, pass string, newPass string, dbID int, conn *websocket.Conn, connUser **User, clientMux *sync.Mutex) (string, helpers.GopherError)

AutoLogIn logs a user in automatically with RememberMe and SqlFeatures enabled in ServerSettings.

WARNING: This is only meant for internal Gopher Game Server mechanics. If you want the "Remember Me" (AKA auto login) feature, enable it in ServerSettings along with the SqlFeatures and corresponding options. You can read more about the "Remember Me" login in the project's usage section.

func GetRoomTypes 

func GetRoomTypes() map[string]*RoomType

GetRoomTypes gets a map of all the RoomTypes.

func GetRoomsState 

func GetRoomsState() map[string]RoomRecoveryState

GetRoomsState is only for internal Gopher Game Server mechanics.

func Login 

func Login(userName string, dbID int, autologPass string, isGuest bool, remMe bool, socket *websocket.Conn,
	connUser **User, clientMux *sync.Mutex) (string, helpers.GopherError)

Login logs a User in to the service.

func Pause 

func Pause()

Pause is only for internal Gopher Game Server mechanics.

func Resume 

func Resume()

Resume is only for internal Gopher Game Server mechanics.

func RoomCount 

func RoomCount() int

RoomCount returns the number of Rooms created on the server.

func SetChatMessageCallback 

func SetChatMessageCallback(cb func(string, *Room, interface{}))

SetChatMessageCallback sets the callback function for when a *User sends a chat message to a *Room. The function passed must have the same parameter types as the following example: 

   func onChatMessage(userName string, room *core.Room, message interface{}) {
	     //code...
	 }

func SetPrivateMessageCallback 

func SetPrivateMessageCallback(cb func(*User, *User, interface{}))

SetPrivateMessageCallback sets the callback function for when a *User sends a private message to another *User. The function passed must have the same parameter types as the following example: 

   func onPrivateMessage(from *core.User, to *core.User, message interface{}) {
	     //code...
	 }

func SetServerMessageCallback 

func SetServerMessageCallback(cb func(*Room, int, interface{}))

SetServerMessageCallback sets the callback function for when the server sends a message to a *Room. The function passed must have the same parameter types as the following example: 

   func onServerMessage(room *core.Room, messageType int, message interface{}) {
	     //code...
	 }

The messageType value can be one of: core.ServerMessageGame, core.ServerMessageNotice, core.ServerMessageImportant, or a custom value you have set.

func SetServerStarted 

func SetServerStarted(val bool)

SetServerStarted is for Gopher Game Server internal mechanics only.

func SettingsSet 

func SettingsSet(kickDups bool, name string, deleteOnLeave bool, sqlFeat bool, remMe bool, multiConn bool, maxConns uint8)

SettingsSet is for Gopher Game Server internal mechanics only.

func UserCount 

func UserCount() int

UserCount returns the number of Users logged into the server.

Types

type Room 

type Room struct {
	// contains filtered or unexported fields
}

Room represents a room on the server that Users can join and leave. Use core.NewRoom() to make a new Room.

WARNING: When you use a *Room object in your code, DO NOT dereference it. Instead, there are many methods for *Room for maniupulating and retrieving any information about them you could possibly need. Dereferencing them could cause data races in the Room fields that get locked by mutexes.

func GetRoom 

func GetRoom(roomName string) (*Room, error)

GetRoom finds a Room on the server. If the room does not exit, an error will be returned.

func NewRoom 

func NewRoom(name string, rType string, isPrivate bool, maxUsers int, owner string) (*Room, error)

NewRoom adds a new room to the server. This can be called before or after starting the server. Parameters:

- name (string): Name of the Room

- rType (string): Room type name (Note: must be a valid RoomType's name)

- isPrivate (bool): Indicates if the room is private or not

- maxUsers (int): Maximum User capacity (Note: 0 means no limit)

- owner (string): The owner of the room. If provided a blank string, will set the owner to the ServerName from ServerSettings

func (*Room) AddInvite 

func (r *Room) AddInvite(userName string) error

AddInvite adds a User to a private Room's invite list. This is only meant for internal Gopher Game Server mechanics. If you want a User to invite someone to a private room, use the *User.Invite() function instead.

NOTE: Remember that private rooms are designed to have an "owner", and only the owner should be able to send an invite and revoke an invitation for their Rooms. Also, *User.Invite() will send an invite notification message to the invited User that the client API can easily receive. Though if you wish to make your own implementations for sending and receiving these notifications, this function is safe to use.

func (*Room) AddUser 

func (r *Room) AddUser(user *User, connID string) error

AddUser adds a User to the Room. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to that User. This must be provided when adding a User to a Room with MultiConnect enabled. Otherwise, an empty string can be used.

func (*Room) ChatMessage 

func (r *Room) ChatMessage(author string, message interface{}) error

ChatMessage sends a chat message to all Users in the Room.

func (*Room) DataMessage 

func (r *Room) DataMessage(message interface{}, recipients []string) error

DataMessage sends a data message to the specified recipients in the Room. The parameter recipients can be nil or an empty slice of string. In which case, the data message will be sent to all Users in the Room.

func (*Room) Delete 

func (r *Room) Delete() error

Delete deletes the Room from the server. Will also send a room leave message to all the Users in the Room that you can capture with the client APIs.

func (*Room) GetUserMap 

func (r *Room) GetUserMap() (map[string]*RoomUser, error)

GetUserMap retrieves all the RoomUsers as a map[string]*RoomUser.

func (*Room) GetVariable 

func (r *Room) GetVariable(key string) (interface{}, error)

GetVariable gets one of the Room's variables.

func (*Room) GetVariables 

func (r *Room) GetVariables(keys []string) (map[string]interface{}, error)

GetVariables gets all the specified (or all if not) Room variables as a map[string]interface{}.

func (*Room) InviteList 

func (r *Room) InviteList() ([]string, error)

InviteList gets a private Room's invite list.

func (*Room) IsPrivate 

func (r *Room) IsPrivate() bool

IsPrivate returns true of the Room is private.

func (*Room) MaxUsers 

func (r *Room) MaxUsers() int

MaxUsers gets the maximum User capacity of the Room.

func (*Room) Name 

func (r *Room) Name() string

Name gets the name of the Room.

func (*Room) NumUsers 

func (r *Room) NumUsers() int

NumUsers gets the number of Users in the Room.

func (*Room) Owner 

func (r *Room) Owner() string

Owner gets the name of the owner of the room

func (*Room) RemoveInvite 

func (r *Room) RemoveInvite(userName string) error

RemoveInvite removes a User from a private Room's invite list. To make a User remove someone from their room themselves, use the *User.RevokeInvite() function.

NOTE: You can use this function safely, but remember that private rooms are designed to have an "owner", and only the owner should be able to send an invite and revoke an invitation for their Rooms. But if you find the need to break the rules here, by all means do so!

func (*Room) RemoveUser 

func (r *Room) RemoveUser(user *User, connID string) error

RemoveUser removes a User from the room. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to that User. This must be provided when removing a User from a Room with MultiConnect enabled. Otherwise, an empty string can be used.

func (*Room) ServerMessage 

func (r *Room) ServerMessage(message interface{}, messageType int, recipients []string) error

ServerMessage sends a server message to the specified recipients in the Room. The parameter recipients can be nil or an empty slice of string. In which case, the server message will be sent to all Users in the Room.

func (*Room) SetVariable 

func (r *Room) SetVariable(key string, value interface{})

SetVariable sets a Room variable.

func (*Room) SetVariables 

func (r *Room) SetVariables(values map[string]interface{})

SetVariables sets all the specified Room variables at once.

func (*Room) Type 

func (r *Room) Type() string

Type gets the type of the Room.

func (*Room) VoiceStream 

func (r *Room) VoiceStream(userName string, userSocket *websocket.Conn, stream interface{})

VoiceStream sends a voice stream from the client API to all the users in the room besides the user who is speaking.

type RoomRecoveryState 

type RoomRecoveryState struct {
	T string                 // rType
	P bool                   // private
	O string                 // owner
	M int                    // maxUsers
	I []string               // inviteList
	V map[string]interface{} // vars
}

RoomRecoveryState is used internally for persisting room states on shutdown.

type RoomType 

type RoomType struct {
	// contains filtered or unexported fields
}

RoomType represents a type of room a client or the server can make. You can only make and set options for a RoomType before starting the server. Doing so at any other time will have no effect at all.

func NewRoomType 

func NewRoomType(name string, serverOnly bool) *RoomType

NewRoomType Adds a RoomType to the server. A RoomType is used in conjunction with it's corresponding callbacks and options. You cannot make a Room on the server until you have at least one RoomType to set it to. A RoomType requires at least a name and the serverOnly option, which when set to true will prevent the client API from being able to create, destroy, invite or revoke an invitation with that RoomType. Though you can always make a CustomClientAction to create a Room, initialize it, send requests, etc. When making a new RoomType you can chain the broadcasts and callbacks you want for it like so: 

rooms.NewRoomType("lobby", true).EnableBroadcastUserEnter().EnableBroadcastUserLeave().
     .SetCreateCallback(yourFunc).SetDeleteCallback(anotherFunc)

func (*RoomType) BroadcastUserEnter 

func (r *RoomType) BroadcastUserEnter() bool

BroadcastUserEnter returns true if this RoomType has a user entry broadcast

func (*RoomType) BroadcastUserLeave 

func (r *RoomType) BroadcastUserLeave() bool

BroadcastUserLeave returns true if this RoomType has a user leave broadcast

func (*RoomType) CreateCallback 

func (r *RoomType) CreateCallback() func(*Room)

CreateCallback returns the function that this RoomType calls when a Room of this RoomType is created.

func (*RoomType) DeleteCallback 

func (r *RoomType) DeleteCallback() func(*Room)

DeleteCallback returns the function that this RoomType calls when a Room of this RoomType is deleted.

func (*RoomType) EnableBroadcastUserEnter 

func (r *RoomType) EnableBroadcastUserEnter() *RoomType

EnableBroadcastUserEnter sends an "entry" message to all Users in the Room when another User enters the Room. You can capture these messages on the client side easily with the client APIs.

Note: You must call this BEFORE starting the server in order for it to take effect.

func (*RoomType) EnableBroadcastUserLeave 

func (r *RoomType) EnableBroadcastUserLeave() *RoomType

EnableBroadcastUserLeave sends a "left" message to all Users in the Room when another User leaves the Room. You can capture these messages on the client side easily with the client APIs.

Note: You must call this BEFORE starting the server in order for it to take effect.

func (*RoomType) EnableVoiceChat 

func (r *RoomType) EnableVoiceChat() *RoomType

EnableVoiceChat Enables voice chat for this RoomType.

Note: You must call this BEFORE starting the server in order for it to take effect.

func (*RoomType) HasCreateCallback 

func (r *RoomType) HasCreateCallback() bool

HasCreateCallback returns true if this RoomType has a creation callback.

func (*RoomType) HasDeleteCallback 

func (r *RoomType) HasDeleteCallback() bool

HasDeleteCallback returns true if this RoomType has a delete callback.

func (*RoomType) HasUserEnterCallback 

func (r *RoomType) HasUserEnterCallback() bool

HasUserEnterCallback returns true if this RoomType has a user enter callback.

func (*RoomType) HasUserLeaveCallback 

func (r *RoomType) HasUserLeaveCallback() bool

HasUserLeaveCallback returns true if this RoomType has a user leave callback.

func (*RoomType) ServerOnly 

func (r *RoomType) ServerOnly() bool

ServerOnly returns true if the RoomType can only be manipulated by the server.

func (*RoomType) SetCreateCallback 

func (r *RoomType) SetCreateCallback(callback func(*Room)) *RoomType

SetCreateCallback is executed when someone creates a Room of this RoomType by setting the creation callback. Your function must take in a Room object as the parameter which is a reference of the created room.

Note: You must call this BEFORE starting the server in order for it to take effect.

func (*RoomType) SetDeleteCallback 

func (r *RoomType) SetDeleteCallback(callback func(*Room)) *RoomType

SetDeleteCallback is executed when someone deletes a Room of this RoomType by setting the delete callback. Your function must take in a Room object as the parameter which is a reference of the deleted room.

Note: You must call this BEFORE starting the server in order for it to take effect.

func (*RoomType) SetUserEnterCallback 

func (r *RoomType) SetUserEnterCallback(callback func(*Room, *RoomUser)) *RoomType

SetUserEnterCallback is executed when a User enters a Room of this RoomType by setting the User enter callback. Your function must take in a Room and a string as the parameters. The Room is the Room in which the User entered, and the string is the name of the User that entered.

Note: You must call this BEFORE starting the server in order for it to take effect.

func (*RoomType) SetUserLeaveCallback 

func (r *RoomType) SetUserLeaveCallback(callback func(*Room, *RoomUser)) *RoomType

SetUserLeaveCallback is executed when a User leaves a Room of this RoomType by setting the User leave callback. Your function must take in a Room and a string as the parameters. The Room is the Room in which the User left, and the string is the name of the User that left.

Note: You must call this BEFORE starting the server in order for it to take effect.

func (*RoomType) UserEnterCallback 

func (r *RoomType) UserEnterCallback() func(*Room, *RoomUser)

UserEnterCallback returns the function that this RoomType calls when a User enters a Room of this RoomType.

func (*RoomType) UserLeaveCallback 

func (r *RoomType) UserLeaveCallback() func(*Room, *RoomUser)

UserLeaveCallback returns the function that this RoomType calls when a User leaves a Room of this RoomType.

func (*RoomType) VoiceChatEnabled 

func (r *RoomType) VoiceChatEnabled() bool

VoiceChatEnabled returns true if voice chat is enabled for this RoomType

type RoomUser 

type RoomUser struct {
	// contains filtered or unexported fields
}

RoomUser represents a User inside of a Room. Use the *RoomUser.User() function to get a *User from a *RoomUser

func (*RoomUser) ConnectionIDs 

func (u *RoomUser) ConnectionIDs() []string

ConnectionIDs returns a []string of all the RoomUser's connection IDs. With MultiConnect in ServerSettings enabled, this will give you all the connections for this User that are currently in the Room. Otherwise, if you want all the User's connection IDs (not just the connections in the specified Room), use *User.ConnectionIDs() after getting the *User object with the *RoomUser.User() function.

func (*RoomUser) User 

func (u *RoomUser) User() *User

User gets the *User object of a *RoomUser.

type User 

type User struct {
	// contains filtered or unexported fields
}

User represents a client who has logged into the service. A User can be a guest, join/leave/create rooms, and call any client action, including your custom client actions. If you are not using the built-in authentication, be aware that you will need to make sure any client who has not been authenticated by the server can't simply log themselves in through the client API. A User has a lot of useful information, so it's highly recommended you look through all the *User methods to get a good understanding about everything you can do with them.

WARNING: When you use a *User object in your code, DO NOT dereference it. Instead, there are many methods for *User for retrieving any information about them you could possibly need. Dereferencing them could cause data races (which will panic and stop the server) in the User fields that get locked for synchronizing access.

func GetUser 

func GetUser(userName string) (*User, error)

GetUser finds a logged in User by their name. Returns an error if the User is not online.

func (*User) AcceptFriendRequest 

func (u *User) AcceptFriendRequest(friendName string) error

AcceptFriendRequest accepts a friend request from another User by their name.

func (*User) ConnectionIDs 

func (u *User) ConnectionIDs() []string

ConnectionIDs returns a []string of all the User's connection IDs

func (*User) DataMessage 

func (u *User) DataMessage(data interface{}, connID string)

DataMessage sends a data message directly to the User.

func (*User) DatabaseID 

func (u *User) DatabaseID() int

DatabaseID gets the database table index of the User.

func (*User) DeclineFriendRequest 

func (u *User) DeclineFriendRequest(friendName string) error

DeclineFriendRequest declines a friend request from another User by their name.

func (*User) FriendRequest 

func (u *User) FriendRequest(friendName string) error

FriendRequest sends a friend request to another User by their name.

func (*User) Friends 

func (u *User) Friends() map[string]database.Friend

Friends gets the Friend list of the User as a map[string]database.Friend where the key string is the friend's User name.

func (*User) GetVariable 

func (u *User) GetVariable(key string, connID string) interface{}

GetVariable gets one of the User's variables by it's key. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to the inviting User. This must be provided when getting a User's variables with MultiConnect enabled. Otherwise, an empty string can be used.

func (*User) GetVariables 

func (u *User) GetVariables(keys []string, connID string) map[string]interface{}

GetVariables gets the specified (or all if nil) User variables as a map[string]interface{}. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to the inviting User. This must be provided when getting a User's variables with MultiConnect enabled. Otherwise, an empty string can be used.

func (*User) Invite 

func (u *User) Invite(invUser *User, connID string) error

Invite allows Users to invite other Users to their private Rooms. The inviting User must be in the Room, and the Room must be private and owned by the inviting User. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to the inviting User. This must be provided when making a User invite another with MultiConnect enabled. Otherwise, an empty string can be used.

func (*User) IsGuest 

func (u *User) IsGuest() bool

IsGuest returns true if the User is a guest.

func (*User) Join 

func (u *User) Join(r *Room, connID string) error

Join makes a User join a Room. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to that User. This must be provided when making a User join a Room with MultiConnect enabled. Otherwise, an empty string can be used.

func (*User) Kick 

func (u *User) Kick()

Kick will log off all connections on this User.

func (*User) Leave 

func (u *User) Leave(connID string) error

Leave makes a User leave their current room. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to that User. This must be provided when making a User leave a Room with MultiConnect enabled. Otherwise, an empty string can be used.

func (*User) Logout 

func (u *User) Logout(connID string)

Logout logs a User out from the service. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to that User. This must be provided when logging a User out with MultiConnect enabled. Otherwise, an empty string can be used.

func (*User) Name 

func (u *User) Name() string

Name gets the name of the User.

func (*User) PrivateMessage 

func (u *User) PrivateMessage(userName string, message interface{})

PrivateMessage sends a private message to another User by name.

func (*User) RemoveFriend 

func (u *User) RemoveFriend(friendName string) error

RemoveFriend removes a friend from this this User and this User from the friend's Friend list.

func (*User) RevokeInvite 

func (u *User) RevokeInvite(revokeUser string, connID string) error

RevokeInvite revokes the invite to the specified user to their current Room, provided they are online, the Room is private, and this User is the owner of the Room. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to the inviting User. This must be provided when making a User revoke an invite with MultiConnect enabled. Otherwise, an empty string can be used.

func (*User) RoomIn 

func (u *User) RoomIn(connID string) *Room

RoomIn gets the Room that the User is currently in. A nil Room pointer means the User is not in a Room. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to that User. This must be provided when getting a User's Room with MultiConnect enabled. Otherwise, an empty string can be used.

func (*User) SetStatus 

func (u *User) SetStatus(status int)

SetStatus sets the status of a User. Also sends a notification to all the User's Friends (with the request status "accepted") that they changed their status.

func (*User) SetVariable 

func (u *User) SetVariable(key string, value interface{}, connID string)

SetVariable sets a User variable. The client API of the User will also receive these changes. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to the inviting User. This must be provided when setting a User's variables with MultiConnect enabled. Otherwise, an empty string can be used.

func (*User) SetVariables 

func (u *User) SetVariables(values map[string]interface{}, connID string)

SetVariables sets all the specified User variables at once. The client API of the User will also receive these changes. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to the inviting User. This must be provided when setting a User's variables with MultiConnect enabled. Otherwise, an empty string can be used.

func (*User) Socket 

func (u *User) Socket(connID string) *websocket.Conn

Socket gets the WebSocket connection of a User. If you are using MultiConnect in ServerSettings, the connID parameter is the connection ID associated with one of the connections attached to that User. This must be provided when getting a User's socket connection with MultiConnect enabled. Otherwise, an empty string can be used.

func (*User) Status 

func (u *User) Status() int

Status gets the status of the User.

Source Files

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