1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120

use crate::{
    client::Client,
    error::Error as HttpError,
    request::{attachment::AttachmentManager, Request, TryIntoRequest},
    response::{marker::EmptyBody, ResponseFuture},
    routing::Route,
};
use twilight_model::{
    http::interaction::InteractionResponse,
    id::{marker::InteractionMarker, Id},
};

/// Respond to an interaction, by its ID and token.
#[must_use = "requests must be configured and executed"]
pub struct CreateResponse<'a> {
    interaction_id: Id<InteractionMarker>,
    interaction_token: &'a str,
    response: &'a InteractionResponse,
    http: &'a Client,
}

impl<'a> CreateResponse<'a> {
    pub(crate) const fn new(
        http: &'a Client,
        interaction_id: Id<InteractionMarker>,
        interaction_token: &'a str,
        response: &'a InteractionResponse,
    ) -> Self {
        Self {
            interaction_id,
            interaction_token,
            response,
            http,
        }
    }

    /// Execute the request, returning a future resolving to a [`Response`].
    ///
    /// [`Response`]: crate::response::Response
    pub fn exec(self) -> ResponseFuture<EmptyBody> {
        let http = self.http;

        match self.try_into_request() {
            Ok(request) => http.request(request),
            Err(source) => ResponseFuture::error(source),
        }
    }
}

impl TryIntoRequest for CreateResponse<'_> {
    fn try_into_request(self) -> Result<Request, HttpError> {
        let mut request = Request::builder(&Route::InteractionCallback {
            interaction_id: self.interaction_id.get(),
            interaction_token: self.interaction_token,
        });

        // Interaction executions don't need the authorization token, only the
        // interaction token.
        request = request.use_authorization_token(false);

        // Determine whether we need to use a multipart/form-data body or a JSON
        // body.
        if let Some(attachments) = self
            .response
            .data
            .as_ref()
            .and_then(|data| data.attachments.as_ref())
        {
            let fields = crate::json::to_vec(&self.response).map_err(HttpError::json)?;

            let form = AttachmentManager::new()
                .set_files(attachments.iter().collect())
                .build_form(&fields);

            request = request.form(form);
        } else {
            request = request.json(&self.response)?;
        }

        Ok(request.build())
    }
}

#[cfg(test)]
mod tests {
    use crate::{client::Client, request::TryIntoRequest};
    use std::error::Error;
    use twilight_http_ratelimiting::Path;
    use twilight_model::{
        http::interaction::{InteractionResponse, InteractionResponseType},
        id::Id,
    };

    #[test]
    fn test_interaction_callback() -> Result<(), Box<dyn Error>> {
        let application_id = Id::new(1);
        let interaction_id = Id::new(2);
        let token = "foo".to_owned().into_boxed_str();

        let client = Client::new(String::new());

        let response = InteractionResponse {
            kind: InteractionResponseType::DeferredUpdateMessage,
            data: None,
        };

        let req = client
            .interaction(application_id)
            .create_response(interaction_id, &token, &response)
            .try_into_request()?;

        assert!(!req.use_authorization_token());
        assert_eq!(
            &Path::InteractionCallback(interaction_id.get()),
            req.ratelimit_path()
        );

        Ok(())
    }
}