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
174
175
176
177
178
179
180

//! Types related to callback queries.

use crate::types::{Message, User};

pub mod id;

pub use id::Id;

/// Represents the origin of the callback.
#[derive(Debug, PartialEq, Clone)]
#[non_exhaustive]
pub enum Origin {
    /// The callback comes from this message.
    Message(Box<Message>),
    /// The callback comes from an inline message with this ID.
    Inline(String),
}

/// Represents the kind of the callback.
#[derive(Debug, PartialEq, Eq, Clone, Hash)]
#[non_exhaustive]
pub enum Kind {
    /// The callback is sent with some data.
    Data(String),
    /// The callback is sent to open a game.
    Game(String),
}

/// Represents a [`CallbackQuery`].
///
/// [`CallbackQuery`]: https://core.telegram.org/bots/api#callbackquery
#[derive(Debug, PartialEq, Clone)]
#[non_exhaustive]
pub struct Query {
    /// The ID of the callback.
    pub id: Id,
    /// The user who initiated the callback.
    pub from: User,
    /// The origin of the query.
    pub origin: Origin,
    /// The identifier of the chat.
    pub chat_instance: String,
    /// The kind of the callback.
    pub kind: Kind,
}

impl Origin {
    /// Checks if `self` is `Message`.
    #[must_use]
    pub fn is_message(&self) -> bool {
        match self {
            Self::Message(..) => true,
            _ => false,
        }
    }

    /// Checks if `self` is `Inline`.
    #[must_use]
    pub fn is_inline(&self) -> bool {
        match self {
            Self::Inline(..) => true,
            _ => false,
        }
    }
}

impl Kind {
    /// Checks if `self` is `Data`.
    #[must_use]
    pub fn is_data(&self) -> bool {
        match self {
            Self::Data(..) => true,
            _ => false,
        }
    }

    /// Checks if `self` is `Game`.
    #[must_use]
    pub fn is_game(&self) -> bool {
        match self {
            Self::Game(..) => true,
            _ => false,
        }
    }
}

const ID: &str = "id";
const FROM: &str = "from";
const MESSAGE: &str = "message";
const INLINE_MESSAGE_ID: &str = "inline_message_id";
const CHAT_INSTANCE: &str = "chat_instance";
const DATA: &str = "data";
const GAME_SHORT_NAME: &str = "game_short_name";

struct QueryVisitor;

impl<'v> serde::de::Visitor<'v> for QueryVisitor {
    type Value = Query;

    fn expecting(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
        write!(fmt, "struct Query")
    }

    fn visit_map<V>(self, mut map: V) -> Result<Self::Value, V::Error>
    where
        V: serde::de::MapAccess<'v>,
    {
        let mut id = None;
        let mut from = None;
        let mut message = None;
        let mut inline_message_id = None;
        let mut chat_instance = None;
        let mut data = None;
        let mut game_short_name = None;

        while let Some(key) = map.next_key()? {
            match key {
                ID => id = Some(map.next_value()?),
                FROM => from = Some(map.next_value()?),
                MESSAGE => message = Some(map.next_value()?),
                INLINE_MESSAGE_ID => {
                    inline_message_id = Some(map.next_value()?)
                }
                CHAT_INSTANCE => chat_instance = Some(map.next_value()?),
                DATA => data = Some(map.next_value()?),
                GAME_SHORT_NAME => game_short_name = Some(map.next_value()?),
                _ => {
                    let _ = map.next_value::<serde::de::IgnoredAny>()?;
                }
            }
        }

        let origin = if let Some(message) = message {
            Origin::Message(message)
        } else if let Some(inline_message_id) = inline_message_id {
            Origin::Inline(inline_message_id)
        } else {
            return Err(serde::de::Error::custom("Neither `message` nor `inline_message_id` was present on `CallbackQuery`"));
        };

        let kind = if let Some(data) = data {
            Kind::Data(data)
        } else if let Some(game_short_name) = game_short_name {
            Kind::Game(game_short_name)
        } else {
            return Err(serde::de::Error::custom("Neither `callback_data` nor `game_short_name` was present on `CallbackQuery`"));
        };

        Ok(Query {
            id: id.ok_or_else(|| serde::de::Error::missing_field(ID))?,
            from: from.ok_or_else(|| serde::de::Error::missing_field(FROM))?,
            origin,
            chat_instance: chat_instance.ok_or_else(|| {
                serde::de::Error::missing_field(CHAT_INSTANCE)
            })?,
            kind,
        })
    }
}

impl<'de> serde::Deserialize<'de> for Query {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: serde::de::Deserializer<'de>,
    {
        deserializer.deserialize_struct(
            "Query",
            &[
                ID,
                FROM,
                MESSAGE,
                INLINE_MESSAGE_ID,
                CHAT_INSTANCE,
                DATA,
                GAME_SHORT_NAME,
            ],
            QueryVisitor,
        )
    }
}