felgens 0.7.1

Bilibili live danmu websocket library
Documentation 
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mod dannmu_msg;
mod interact_word;
mod send_gift;
mod super_chat;
mod welcome_guard;

use serde::Deserialize;
use serde_json::Value;

use crate::ws_type::welcome_guard::WelcomeGuard;

pub use self::dannmu_msg::DanmuMessage;
pub use self::interact_word::InteractWord;
pub use self::send_gift::SendGift;
pub use self::super_chat::SuperChatMessage;

#[derive(Debug, Deserialize, Clone)]
pub struct WsStreamCtx {
    cmd: Option<String>,
    info: Option<Vec<Value>>,
    data: Option<WsStreamCtxData>,
    #[serde(flatten)]
    _v: Value,
}

#[derive(Debug, Deserialize, Clone)]
pub struct WsStreamCtxData {
    message: Option<String>,
    price: Option<u32>,
    start_time: Option<u64>,
    time: Option<u32>,
    uid: Option<Value>,
    user_info: Option<WsStreamCtxDataUser>,
    medal_info: Option<WsStreamCtxDataMedalInfo>,
    uname: Option<String>,
    fans_medal: Option<WsStreamCtxDataMedalInfo>,
    action: Option<String>,
    #[serde(rename = "giftName")]
    gift_name: Option<String>,
    num: Option<u64>,
    combo_num: Option<u64>,
    gift_num: Option<u64>,
    combo_send: Box<Option<WsStreamCtxData>>,
    guard_level: Option<u64>,
}

#[derive(Debug, Deserialize, Clone)]
pub struct WsStreamCtxDataMedalInfo {
    medal_name: Option<String>,
    medal_level: Option<u32>,
}

#[derive(Debug, Deserialize, Clone)]
pub struct WsStreamCtxDataUser {
    face: String,
    uname: String,
}

#[derive(Debug)]
pub enum WsStreamMessageType {
    DanmuMsg(DanmuMessage),
    WelcomeGuard(WelcomeGuard),
    // ENTRY_EFFECT,
    // WELCOME,
    // SUPER_CHAT_MESSAGE_JPN,
    SuperChatMessage(SuperChatMessage),
    InteractWord(InteractWord),
    SendGift(SendGift),
    // COMBO_SEND,
    // ANCHOR_LOT_START,
    // ANCHOR_LOT_END,
    // ANCHOR_LOT_AWARD,
    // GUARD_BUY,
    // USER_TOAST_MSG,
    // ACTIVITY_BANNER_UPDATE_V2,
    // ROOM_REAL_TIME_MESSAGE_UPDATE,
}

#[derive(thiserror::Error, Debug)]
pub enum LiveMessageError {
    #[error("Can't deserialize message: {0}")]
    CantParse(String),
    #[error("Can't get superchat message: {0:#?}")]
    SuperChatMessageError(WsStreamCtx),
    #[error("Can't get danmu message: {0:#?}")]
    DanmuMessageError(WsStreamCtx),
    #[error("Can't get ineract message: {0:#?}")]
    InteractWordError(WsStreamCtx),
    #[error("Can't get send gift message: {0:#?}")]
    SendGiftMessageError(WsStreamCtx),
    #[error("Can't get welcome guard message: {0:#?}")]
    WelcomeGuardError(WsStreamCtx),
    #[error("Unknown msg: {0:#?}")]
    UnknownMessage(WsStreamCtx),
}

pub type LiveMessageResult<'a, T> = std::result::Result<T, LiveMessageError>;

impl WsStreamCtx {
    pub fn new(s: &'_ str) -> LiveMessageResult<'_, Self> {
        serde_json::from_str(s).map_err(|_| LiveMessageError::CantParse(s.to_string()))
    }

    pub fn match_msg(&'_ self) -> LiveMessageResult<'_, WsStreamMessageType> {
        let cmd = self.handle_cmd();

        let result = match cmd {
            Some("DANMU_MSG") => WsStreamMessageType::DanmuMsg(DanmuMessage::new_from_ctx(self)?),
            Some("SUPER_CHAT_MESSAGE") => {
                WsStreamMessageType::SuperChatMessage(SuperChatMessage::new_from_ctx(self)?)
            }
            Some("INTERACT_WORD") => {
                WsStreamMessageType::InteractWord(InteractWord::new_from_ctx(self)?)
            }
            Some("SEND_GIFT") | Some("COMBO_SEND") => {
                WsStreamMessageType::SendGift(SendGift::new_from_ctx(self)?)
            }
            Some("WELCOME_GUARD") => {
                WsStreamMessageType::WelcomeGuard(WelcomeGuard::new_from_ctx(self)?)
            }
            _ => return Err(LiveMessageError::UnknownMessage(self.clone())),
        };

        Ok(result)
    }

    fn handle_cmd(&self) -> Option<&str> {
        // handle DANMU_MSG:4:0:2:2:2:0
        let cmd = if let Some(c) = self.cmd.as_deref() {
            if c.starts_with("DANMU_MSG") {
                Some("DANMU_MSG")
            } else {
                Some(c)
            }
        } else {
            None
        };

        cmd
    }
}