package api import ( "github.com/diamondburned/arikawa/v2/discord" "github.com/diamondburned/arikawa/v2/utils/httputil" ) const MaxMessageReactionFetchLimit = 100 // React creates a reaction for the message. // // This endpoint requires the READ_MESSAGE_HISTORY permission to be present on // the current user. Additionally, if nobody else has reacted to the message // using this emoji, this endpoint requires the 'ADD_REACTIONS' permission to // be present on the current user. func (c *Client) React( channelID discord.ChannelID, messageID discord.MessageID, emoji discord.APIEmoji) error { return c.FastRequest( "PUT", EndpointChannels+channelID.String()+ "/messages/"+messageID.String()+ "/reactions/"+emoji.PathString()+"/@me", ) } // Unreact removes a reaction the current user has made for the message. func (c *Client) Unreact( channelID discord.ChannelID, messageID discord.MessageID, emoji discord.APIEmoji) error { return c.DeleteUserReaction(channelID, messageID, 0, emoji) } // Reactions returns a list of users that reacted with the passed Emoji. This // method automatically paginates until it reaches the passed limit, or, if the // limit is set to 0, has fetched all users within the passed range. // // As the underlying endpoint has a maximum of 100 users per request, at // maximum a total of limit/100 rounded up requests will be made, although they // may be less, if no more guilds are available. // // When fetching the users, those with the smallest ID will be fetched first. func (c *Client) Reactions( channelID discord.ChannelID, messageID discord.MessageID, emoji discord.APIEmoji, limit uint) ([]discord.User, error) { return c.ReactionsAfter(channelID, messageID, 0, emoji, limit) } // ReactionsBefore returns a list of users that reacted with the passed Emoji. // This method automatically paginates until it reaches the passed limit, or, // if the limit is set to 0, has fetched all users with an id smaller than // before. // // As the underlying endpoint has a maximum of 100 users per request, at // maximum a total of limit/100 rounded up requests will be made, although they // may be less, if no more guilds are available. func (c *Client) ReactionsBefore( channelID discord.ChannelID, messageID discord.MessageID, before discord.UserID, emoji discord.APIEmoji, limit uint) ([]discord.User, error) { users := make([]discord.User, 0, limit) fetch := uint(MaxMessageReactionFetchLimit) unlimited := limit == 0 for limit > 0 || unlimited { if limit > 0 { // Only fetch as much as we need. Since limit gradually decreases, // we only need to fetch min(fetch, limit). fetch = uint(min(MaxMessageReactionFetchLimit, int(limit))) limit -= fetch } r, err := c.reactionsRange(channelID, messageID, before, 0, emoji, fetch) if err != nil { return users, err } users = append(r, users...) if len(r) < MaxMessageReactionFetchLimit { break } before = r[0].ID } if len(users) == 0 { return nil, nil } return users, nil } // ReactionsAfter returns a list of users that reacted with the passed Emoji. // This method automatically paginates until it reaches the passed limit, or, // if the limit is set to 0, has fetched all users with an id higher than // after. // // As the underlying endpoint has a maximum of 100 users per request, at // maximum a total of limit/100 rounded up requests will be made, although they // may be less, if no more guilds are available. func (c *Client) ReactionsAfter( channelID discord.ChannelID, messageID discord.MessageID, after discord.UserID, emoji discord.APIEmoji, limit uint) ([]discord.User, error) { users := make([]discord.User, 0, limit) fetch := uint(MaxMessageReactionFetchLimit) unlimited := limit == 0 for limit > 0 || unlimited { if limit > 0 { // Only fetch as much as we need. Since limit gradually decreases, // we only need to fetch min(fetch, limit). fetch = uint(min(MaxMessageReactionFetchLimit, int(limit))) limit -= fetch } r, err := c.reactionsRange(channelID, messageID, 0, after, emoji, fetch) if err != nil { return users, err } users = append(users, r...) if len(r) < MaxMessageReactionFetchLimit { break } after = r[len(r)-1].ID } if len(users) == 0 { return nil, nil } return users, nil } // reactionsRange get users before and after IDs. Before, after, and limit are // optional. A maximum limit of only 100 reactions could be returned. func (c *Client) reactionsRange( channelID discord.ChannelID, messageID discord.MessageID, before, after discord.UserID, emoji discord.APIEmoji, limit uint) ([]discord.User, error) { switch { case limit == 0: limit = 25 case limit > 100: limit = 100 } var param struct { Before discord.UserID `schema:"before,omitempty"` After discord.UserID `schema:"after,omitempty"` Limit uint `schema:"limit"` } param.Before = before param.After = after param.Limit = limit var users []discord.User return users, c.RequestJSON( &users, "GET", EndpointChannels+channelID.String()+ "/messages/"+messageID.String()+ "/reactions/"+emoji.PathString(), httputil.WithSchema(c, param), ) } // DeleteReaction deletes another user's reaction. // // This endpoint requires the MANAGE_MESSAGES permission to be present on the // current user. func (c *Client) DeleteUserReaction( channelID discord.ChannelID, messageID discord.MessageID, userID discord.UserID, emoji discord.APIEmoji) error { var user = "@me" if userID > 0 { user = userID.String() } return c.FastRequest( "DELETE", EndpointChannels+channelID.String()+ "/messages/"+messageID.String()+ "/reactions/"+emoji.PathString()+"/"+user, ) } // DeleteReactions deletes all the reactions for a given emoji on a message. // // This endpoint requires the MANAGE_MESSAGES permission to be present on the // current user. // Fires a Message Reaction Remove Emoji Gateway event. func (c *Client) DeleteReactions( channelID discord.ChannelID, messageID discord.MessageID, emoji discord.APIEmoji) error { return c.FastRequest( "DELETE", EndpointChannels+channelID.String()+ "/messages/"+messageID.String()+ "/reactions/"+emoji.PathString(), ) } // DeleteAllReactions deletes all reactions on a message. // // This endpoint requires the MANAGE_MESSAGES permission to be present on the // current user. // Fires a Message Reaction Remove All Gateway event. func (c *Client) DeleteAllReactions( channelID discord.ChannelID, messageID discord.MessageID) error { return c.FastRequest( "DELETE", EndpointChannels+channelID.String()+"/messages/"+messageID.String()+"/reactions", ) }