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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173

use failure::Error;
use oauth2::basic::BasicClient;
use reqwest::{Client, get, RequestBuilder, StatusCode};
use serde::Serialize;

use crate::models::*;
use crate::token::AuthToken;

const SEARCH_URL: &str = "https://www.googleapis.com/youtube/v3/search";
const LIST_PLAYLISTS_URL: &str = "https://www.googleapis.com/youtube/v3/playlists";
const LIST_PLAYLIST_ITEMS_URL: &str = "https://www.googleapis.com/youtube/v3/playlistItems";

#[derive(Debug, Clone)]
pub(crate) struct YoutubeOAuth {
    pub(crate) client_id: String,
    pub(crate) client_secret: String,
    pub(crate) client: BasicClient,
    pub(crate) token: AuthToken,
}

#[derive(Debug, Clone)]
pub struct YoutubeApi {
    pub(crate) api_key: String,
    pub(crate) oauth: Option<YoutubeOAuth>,
    pub(crate) client: Client,
}

mod auth;

impl YoutubeApi {
    pub async fn get_video_info(id: &str) -> Result<VideoMetadata, failure::Error> {
        let url = format!("https://www.youtube.com/get_video_info?video_id={}", id);
        let res = get(&url).await?.error_for_status()?.text().await?;
        let response: VideoMetadataResponse = serde_urlencoded::from_str(&res)?;
        let metadata: VideoMetadata = serde_json::from_str(&response.player_response)?;

        Ok(metadata)
    }

    pub fn new<S: Into<String>>(api_key: S) -> Self {
        YoutubeApi {
            api_key: api_key.into(),
            oauth: None,
            client: Client::new(),
        }
    }


    pub async fn search(&self, search_request: SearchRequestBuilder) -> Result<SearchResponse, failure::Error> {
        let request = search_request.build(&self.api_key);
        let response = self.client.get(SEARCH_URL)
            .query(&request)
            .send()
            .await?
            .error_for_status()?
            .json()
            .await?;

        Ok(response)
    }

    pub async fn list_playlists(&self, request: ListPlaylistsRequestBuilder) -> Result<ListPlaylistsResponse, failure::Error> {
        let request = request.build();
        let response = self.api_get(LIST_PLAYLISTS_URL, request)
            .await?
            .json()
            .await?;

        Ok(response)
    }

    pub async fn list_playlist_items(&self, request: ListPlaylistItemsRequestBuilder) -> Result<ListPlaylistItemsResponse, failure::Error> {
        let request = request.build();
        let response = self.api_get(LIST_PLAYLIST_ITEMS_URL, request)
            .await?
            .json()
            .await?;

        Ok(response)
    }

    async fn api_get<S: Into<String>, T: Serialize>(
        &self,
        url: S,
        params: T,
    ) -> Result<reqwest::Response, Error> {
        let req = self.client.get(&url.into()).query(&params);
        if let Some(oauth) = self.oauth.as_ref() {
            if oauth.token.requires_new_token().await {
                oauth.token.refresh(&oauth.client).await?;
            }
            let res = req
                .try_clone()
                .unwrap()
                .bearer_auth(oauth.token.get_auth_header().await?)
                .send()
                .await?
                .error_for_status();
            if let Err(err) = res {
                self.retry_request(req, err, oauth).await
            } else {
                let res = res.unwrap();
                Ok(res)
            }
        } else {
            let res = req.send().await?.error_for_status()?;
            Ok(res)
        }
    }

    async fn retry_request(
        &self,
        req: RequestBuilder,
        err: reqwest::Error,
        oauth: &YoutubeOAuth,
    ) -> Result<reqwest::Response, Error> {
        if let Some(StatusCode::UNAUTHORIZED) = err.status() {
            oauth.token.refresh(&oauth.client).await?;
            let res = req
                .bearer_auth(oauth.token.get_auth_header().await?)
                .send()
                .await?
                .error_for_status()?;
            Ok(res)
        } else {
            Err(err.into())
        }
    }
}

#[cfg(test)]
mod test {
    use crate::models::SearchRequestBuilder;
    use crate::YoutubeApi;

    fn create_api() -> YoutubeApi {
        YoutubeApi::new(env!("YOUTUBE_API_KEY"))
    }

    #[tokio::test]
    async fn get_video_info() {
        let video_ids = vec![
            "yfqTCWepx4U",
            "ZGIfJHeZKKE",
            "btecuyQKH-E",
            "uM7JjfHDuFM",
            "BgWpK28dt6I",
            "8xe6nLVXEC0",
            "O3WKbJLai1g"
        ];
        for video_id in video_ids {
            let metadata = YoutubeApi::get_video_info(video_id).await;
            if metadata.is_err() {
                println!("{:?}", metadata);
            }
            assert!(metadata.is_ok());
        }
    }

    #[tokio::test]
    async fn search_should_work() {
        let api = create_api();
        let request = SearchRequestBuilder {
            query: Some(String::from("Don't stay in school")),
            ..SearchRequestBuilder::default()
        };

        let res = api.search(request).await;

        println!("{:?}", res);
        assert!(res.is_ok())
    }
}