Struct Context 

pub struct Context {
    pub data: Arc<RwLock<TypeMap>>,
    pub shard: ShardMessenger,
    pub shard_id: ShardId,
    pub http: Arc<Http>,
    pub cache: Arc<Cache>,
}

Available on crate feature client only.

The context is a general utility struct provided on event dispatches.

The Context helps with dealing with the current “context” of the event dispatch. The context also acts as a general high-level interface over the associated Shard which received the event, or the low-level http module.

The context contains “shortcuts”, like for interacting with the shard. Methods like Self::set_activity will unlock the shard and perform an update for you to save a bit of work.

A context will only live for the event it was dispatched for. After the event handler finished, it is destroyed and will not be re-used.

Fields

data: Arc<RwLock<TypeMap>>

A clone of Client::data. Refer to its documentation for more information.

shard: ShardMessenger

The messenger to communicate with the shard runner.

shard_id: ShardId

The ID of the shard this context is related to.

http: Arc<Http>

cache: Arc<Cache>

Available on crate feature cache only.

Implementations

impl Context

pub fn online(&self)

Available on crate feature gateway only.

Sets the current user as being Online. This maintains the current activity.

Examples

Set the current user to being online on the shard:

#[serenity::async_trait]
impl EventHandler for Handler {
    async fn message(&self, ctx: Context, msg: Message) {
        if msg.content == "!online" {
            ctx.online();
        }
    }
}

pub fn idle(&self)

Available on crate feature gateway only.

Sets the current user as being Idle. This maintains the current activity.

Examples

Set the current user to being idle on the shard:

#[serenity::async_trait]
impl EventHandler for Handler {
    async fn message(&self, ctx: Context, msg: Message) {
        if msg.content == "!idle" {
            ctx.idle();
        }
    }
}

pub fn dnd(&self)

Available on crate feature gateway only.

Sets the current user as being DoNotDisturb. This maintains the current activity.

Examples

Set the current user to being Do Not Disturb on the shard:

#[serenity::async_trait]
impl EventHandler for Handler {
    async fn message(&self, ctx: Context, msg: Message) {
        if msg.content == "!dnd" {
            ctx.dnd();
        }
    }
}

pub fn invisible(&self)

Available on crate feature gateway only.

Sets the current user as being Invisible. This maintains the current activity.

Examples

Set the current user to being invisible on the shard:

#[serenity::async_trait]
impl EventHandler for Handler {
    async fn message(&self, ctx: Context, msg: Message) {
        if msg.content == "!invisible" {
            ctx.invisible();
        }
    }
}

pub fn reset_presence(&self)

Available on crate feature gateway only.

“Resets” the current user’s presence, by setting the activity to None and the online status to Online.

Use Self::set_presence for fine-grained control over individual details.

Examples

Reset the current user’s presence on the shard:

#[serenity::async_trait]
impl EventHandler for Handler {
    async fn message(&self, ctx: Context, msg: Message) {
        if msg.content == "!reset_presence" {
            ctx.reset_presence();
        }
    }
}

pub fn set_activity(&self, activity: Option<ActivityData>)

Available on crate feature gateway only.

Sets the current activity.

Examples

Create a command named ~setgame that accepts a name of a game to be playing:

use serenity::gateway::ActivityData;

#[serenity::async_trait]
impl EventHandler for Handler {
    async fn message(&self, ctx: Context, msg: Message) {
        let mut args = msg.content.splitn(2, ' ');

        if let (Some("~setgame"), Some(game)) = (args.next(), args.next()) {
            ctx.set_activity(Some(ActivityData::playing(game)));
        }
    }
}

pub fn set_presence(&self, activity: Option<ActivityData>, status: OnlineStatus)

Available on crate feature gateway only.

Sets the current user’s presence, providing all fields to be passed.

Examples

Setting the current user as having no activity and being Idle:

#[serenity::async_trait]
impl EventHandler for Handler {
    async fn ready(&self, ctx: Context, _: Ready) {
        use serenity::model::user::OnlineStatus;

        ctx.set_presence(None, OnlineStatus::Idle);
    }
}

Setting the current user as playing "Heroes of the Storm", while being DoNotDisturb:

#[serenity::async_trait]
impl EventHandler for Handler {
    async fn ready(&self, context: Context, _: Ready) {
        use serenity::gateway::ActivityData;
        use serenity::model::user::OnlineStatus;

        let activity = ActivityData::playing("Heroes of the Storm");
        let status = OnlineStatus::DoNotDisturb;

        context.set_presence(Some(activity), status);
    }
}

pub async fn get_application_emojis(&self) -> Result<Vec<Emoji>>

Gets all emojis for the current application.

Errors

Returns an error if the Application ID is not known.

pub async fn get_application_emoji(&self, emoji_id: EmojiId) -> Result<Emoji>

Gets information about an application emoji.

Errors

Returns an error if the emoji does not exist.

pub async fn create_application_emoji( &self, name: &str, image: &str, ) -> Result<Emoji>

Creates an application emoji with a name and base64-encoded image.

Errors

See Guild::create_emoji for information about name and filesize requirements. This method will error if said requirements are not met.

pub async fn edit_application_emoji( &self, emoji_id: EmojiId, name: &str, ) -> Result<Emoji>

Changes the name of an application emoji.

Errors

Returns an error if the emoji does not exist.

pub async fn delete_application_emoji(&self, emoji_id: EmojiId) -> Result<()>

Deletes an application emoji.

Errors

Returns an error if the emoji does not exist.

Trait Implementations

impl AsRef<Arc<Cache>> for Context

Available on crate feature cache only.

fn as_ref(&self) -> &Arc<Cache>

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<Arc<Http>> for Context

fn as_ref(&self) -> &Arc<Http>

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<Cache> for Context

Available on crate feature cache only.

fn as_ref(&self) -> &Cache

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<Http> for Context

fn as_ref(&self) -> &Http

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<ShardMessenger> for Context

Available on crate feature gateway only.

fn as_ref(&self) -> &ShardMessenger

Converts this type into a shared reference of the (usually inferred) input type.

impl CacheHttp for Context

Available on crate feature http only.

fn http(&self) -> &Http

fn cache(&self) -> Option<&Arc<Cache>>

Available on crate feature cache only.

impl Clone for Context

fn clone(&self) -> Context

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Context

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.