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https://github.com/diamondburned/arikawa.git
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348 lines
11 KiB
Go
348 lines
11 KiB
Go
package api
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import (
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"github.com/pkg/errors"
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"github.com/diamondburned/arikawa/v2/discord"
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"github.com/diamondburned/arikawa/v2/utils/httputil"
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"github.com/diamondburned/arikawa/v2/utils/json/option"
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)
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// the limit of max messages per request, as imposed by Discord
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const maxMessageFetchLimit = 100
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// Messages returns a slice filled with the most recent messages sent in the
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// channel with the passed ID. The method automatically paginates until it
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// reaches the passed limit, or, if the limit is set to 0, has fetched all
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// messages in the channel.
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//
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// As the underlying endpoint is capped at a maximum of 100 messages per
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// request, at maximum a total of limit/100 rounded up requests will be made,
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// although they may be less, if no more messages are available.
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//
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// When fetching the messages, those with the highest ID, will be fetched
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// first.
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// The returned slice will be sorted from latest to oldest.
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func (c *Client) Messages(channelID discord.ChannelID, limit uint) ([]discord.Message, error) {
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// Since before is 0 it will be omitted by the http lib, which in turn
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// will lead discord to send us the most recent messages without having to
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// specify a Snowflake.
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return c.MessagesBefore(channelID, 0, limit)
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}
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// MessagesAround returns messages around the ID, with a limit of 100.
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func (c *Client) MessagesAround(
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channelID discord.ChannelID, around discord.MessageID, limit uint) ([]discord.Message, error) {
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return c.messagesRange(channelID, 0, 0, around, limit)
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}
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// MessagesBefore returns a slice filled with the messages sent in the channel
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// with the passed id. The method automatically paginates until it reaches the
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// passed limit, or, if the limit is set to 0, has fetched all messages in the
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// channel with an id smaller than before.
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//
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// As the underlying endpoint has a maximum of 100 messages per request, at
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// maximum a total of limit/100 rounded up requests will be made, although they
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// may be less, if no more messages are available.
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//
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// The returned slice will be sorted from latest to oldest.
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func (c *Client) MessagesBefore(
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channelID discord.ChannelID, before discord.MessageID, limit uint) ([]discord.Message, error) {
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msgs := make([]discord.Message, 0, limit)
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fetch := uint(maxMessageFetchLimit)
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// Check if we are truly fetching unlimited messages to avoid confusion
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// later on, if the limit reaches 0.
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unlimited := limit == 0
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for limit > 0 || unlimited {
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if limit > 0 {
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// Only fetch as much as we need. Since limit gradually decreases,
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// we only need to fetch min(fetch, limit).
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if fetch > limit {
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fetch = limit
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}
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limit -= maxMessageFetchLimit
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}
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m, err := c.messagesRange(channelID, before, 0, 0, fetch)
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if err != nil {
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return msgs, err
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}
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// Append the older messages into the list of newer messages.
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msgs = append(msgs, m...)
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if len(m) < maxMessageFetchLimit {
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break
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}
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before = m[len(m)-1].ID
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}
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if len(msgs) == 0 {
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return nil, nil
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}
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return msgs, nil
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}
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// MessagesAfter returns a slice filled with the messages sent in the channel
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// with the passed ID. The method automatically paginates until it reaches the
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// passed limit, or, if the limit is set to 0, has fetched all messages in the
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// channel with an id higher than after.
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//
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// As the underlying endpoint has a maximum of 100 messages per request, at
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// maximum a total of limit/100 rounded up requests will be made, although they
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// may be less, if no more messages are available.
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//
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// The returned slice will be sorted from latest to oldest.
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func (c *Client) MessagesAfter(
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channelID discord.ChannelID, after discord.MessageID, limit uint) ([]discord.Message, error) {
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// 0 is uint's zero value and will lead to the after param getting omitted,
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// which in turn will lead to the most recent messages being returned.
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// Setting this to 1 will prevent that.
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if after == 0 {
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after = 1
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}
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var msgs []discord.Message
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fetch := uint(maxMessageFetchLimit)
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// Check if we are truly fetching unlimited messages to avoid confusion
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// later on, if the limit reaches 0.
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unlimited := limit == 0
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for limit > 0 || unlimited {
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if limit > 0 {
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// Only fetch as much as we need. Since limit gradually decreases,
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// we only need to fetch min(fetch, limit).
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if fetch > limit {
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fetch = limit
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}
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limit -= maxMessageFetchLimit
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}
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m, err := c.messagesRange(channelID, 0, after, 0, fetch)
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if err != nil {
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return msgs, err
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}
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// Prepend the older messages into the newly-fetched messages list.
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msgs = append(m, msgs...)
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if len(m) < maxMessageFetchLimit {
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break
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}
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after = m[0].ID
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}
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if len(msgs) == 0 {
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return nil, nil
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}
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return msgs, nil
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}
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func (c *Client) messagesRange(
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channelID discord.ChannelID, before, after, around discord.MessageID, limit uint) ([]discord.Message, error) {
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switch {
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case limit == 0:
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limit = 50
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case limit > 100:
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limit = 100
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}
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var param struct {
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Before discord.MessageID `schema:"before,omitempty"`
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After discord.MessageID `schema:"after,omitempty"`
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Around discord.MessageID `schema:"around,omitempty"`
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Limit uint `schema:"limit"`
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}
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param.Before = before
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param.After = after
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param.Around = around
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param.Limit = limit
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var msgs []discord.Message
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return msgs, c.RequestJSON(
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&msgs, "GET",
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EndpointChannels+channelID.String()+"/messages",
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httputil.WithSchema(c, param),
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)
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}
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// Message returns a specific message in the channel.
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//
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// If operating on a guild channel, this endpoint requires the
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// READ_MESSAGE_HISTORY permission to be present on the current user.
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func (c *Client) Message(channelID discord.ChannelID, messageID discord.MessageID) (*discord.Message, error) {
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var msg *discord.Message
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return msg, c.RequestJSON(&msg, "GET",
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EndpointChannels+channelID.String()+"/messages/"+messageID.String())
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}
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// SendText posts a only-text message to a guild text or DM channel.
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//
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// If operating on a guild channel, this endpoint requires the SEND_MESSAGES
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// permission to be present on the current user.
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//
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// Fires a Message Create Gateway event.
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func (c *Client) SendText(channelID discord.ChannelID, content string) (*discord.Message, error) {
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return c.SendMessageComplex(channelID, SendMessageData{
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Content: content,
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})
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}
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// SendEmbed posts an Embed to a guild text or DM channel.
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//
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// If operating on a guild channel, this endpoint requires the SEND_MESSAGES
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// permission to be present on the current user.
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//
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// Fires a Message Create Gateway event.
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func (c *Client) SendEmbed(
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channelID discord.ChannelID, e discord.Embed) (*discord.Message, error) {
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return c.SendMessageComplex(channelID, SendMessageData{
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Embed: &e,
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})
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}
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// SendMessage posts a message to a guild text or DM channel.
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//
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// If operating on a guild channel, this endpoint requires the SEND_MESSAGES
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// permission to be present on the current user.
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//
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// Fires a Message Create Gateway event.
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func (c *Client) SendMessage(
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channelID discord.ChannelID, content string, embed *discord.Embed) (*discord.Message, error) {
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return c.SendMessageComplex(channelID, SendMessageData{
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Content: content,
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Embed: embed,
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})
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}
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// https://discord.com/developers/docs/resources/channel#edit-message-json-params
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type EditMessageData struct {
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// Content is the new message contents (up to 2000 characters).
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Content option.NullableString `json:"content,omitempty"`
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// Embed contains embedded rich content.
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Embed *discord.Embed `json:"embed,omitempty"`
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// AllowedMentions are the allowed mentions for a message.
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AllowedMentions *AllowedMentions `json:"allowed_mentions,omitempty"`
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// Flags edits the flags of a message (only SUPPRESS_EMBEDS can currently
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// be set/unset)
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//
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// This field is nullable.
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Flags *discord.MessageFlags `json:"flags,omitempty"`
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}
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// EditText edits the contents of a previously sent message. For more
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// documentation, refer to EditMessageComplex.
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func (c *Client) EditText(
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channelID discord.ChannelID, messageID discord.MessageID, content string) (*discord.Message, error) {
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return c.EditMessageComplex(channelID, messageID, EditMessageData{
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Content: option.NewNullableString(content),
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})
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}
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// EditEmbed edits the embed of a previously sent message. For more
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// documentation, refer to EditMessageComplex.
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func (c *Client) EditEmbed(
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channelID discord.ChannelID, messageID discord.MessageID, embed discord.Embed) (*discord.Message, error) {
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return c.EditMessageComplex(channelID, messageID, EditMessageData{
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Embed: &embed,
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})
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}
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// EditMessage edits a previously sent message. For more documentation, refer to
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// EditMessageComplex.
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func (c *Client) EditMessage(
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channelID discord.ChannelID, messageID discord.MessageID, content string,
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embed *discord.Embed, suppressEmbeds bool) (*discord.Message, error) {
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var data = EditMessageData{
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Content: option.NewNullableString(content),
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Embed: embed,
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}
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if suppressEmbeds {
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data.Flags = &discord.SuppressEmbeds
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}
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return c.EditMessageComplex(channelID, messageID, data)
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}
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// EditMessageComplex edits a previously sent message. The fields Content,
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// Embed, AllowedMentions and Flags can be edited by the original message
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// author. Other users can only edit flags and only if they have the
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// MANAGE_MESSAGES permission in the corresponding channel. When specifying
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// flags, ensure to include all previously set flags/bits in addition to ones
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// that you are modifying. Only flags documented in EditMessageData may be
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// modified by users (unsupported flag changes are currently ignored without
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// error).
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//
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// Fires a Message Update Gateway event.
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func (c *Client) EditMessageComplex(
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channelID discord.ChannelID, messageID discord.MessageID, data EditMessageData) (*discord.Message, error) {
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if data.AllowedMentions != nil {
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if err := data.AllowedMentions.Verify(); err != nil {
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return nil, errors.Wrap(err, "allowedMentions error")
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}
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}
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if data.Embed != nil {
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if err := data.Embed.Validate(); err != nil {
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return nil, errors.Wrap(err, "embed error")
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}
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}
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var msg *discord.Message
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return msg, c.RequestJSON(
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&msg, "PATCH",
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EndpointChannels+channelID.String()+"/messages/"+messageID.String(),
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httputil.WithJSONBody(data),
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)
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}
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// DeleteMessage delete a message. If operating on a guild channel and trying
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// to delete a message that was not sent by the current user, this endpoint
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// requires the MANAGE_MESSAGES permission.
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func (c *Client) DeleteMessage(channelID discord.ChannelID, messageID discord.MessageID) error {
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return c.FastRequest("DELETE", EndpointChannels+channelID.String()+
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"/messages/"+messageID.String())
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}
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// DeleteMessages deletes multiple messages in a single request. This endpoint
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// can only be used on guild channels and requires the MANAGE_MESSAGES
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// permission. This endpoint only works for bots.
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//
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// This endpoint will not delete messages older than 2 weeks, and will fail if
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// any message provided is older than that or if any duplicate message IDs are
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// provided.
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//
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// Fires a Message Delete Bulk Gateway event.
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func (c *Client) DeleteMessages(channelID discord.ChannelID, messageIDs []discord.MessageID) error {
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var param struct {
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Messages []discord.MessageID `json:"messages"`
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}
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param.Messages = messageIDs
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return c.FastRequest(
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"POST",
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EndpointChannels+channelID.String()+"/messages/bulk-delete",
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httputil.WithJSONBody(param),
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)
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}
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