twilight-interactions-derive 0.17.0

Macros and utilities to make Discord Interactions easy to use with Twilight.
Documentation 
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

use proc_macro2::TokenStream;
use quote::ToTokens;
use syn::{Error, Lit, Path, Result};

use super::attribute::{ParseAttribute, ParseSpanned};

/// Path to a function.
#[derive(Clone)]
pub struct FunctionPath(Path);

impl ParseAttribute for FunctionPath {
    fn parse_attribute(input: Lit) -> Result<Self> {
        let Lit::Str(lit) = input else {
            return Err(Error::new_spanned(input, "expected string literal"));
        };

        let path = lit.parse_with(Path::parse_mod_style)?;

        Ok(Self(path))
    }
}

impl ToTokens for FunctionPath {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        self.0.to_tokens(tokens)
    }
}

/// Slash command or command option name.
///
/// The following requirements are validated:
/// - Length between 1 and 32 characters
/// - Only alphanumeric character allowed (except '-' and '_')
/// - Must be lowercase when possible
///
/// https://discord.com/developers/docs/interactions/application-commands#application-command-object-application-command-naming
#[derive(Clone, Debug)]
pub struct CommandName(String);

impl ParseAttribute for CommandName {
    fn parse_attribute(input: Lit) -> Result<Self> {
        let spanned: ParseSpanned<String> = ParseAttribute::parse_attribute(input)?;
        let value = spanned.inner.trim();

        match value.chars().count() {
            1..=32 => (),
            _ => return Err(spanned.error("name must be between 1 and 32 characters")),
        }

        for char in value.chars() {
            if !char.is_alphanumeric() && char != '-' && char != '_' {
                return Err(spanned.error(format!(
                    "name must only contain word characters, found invalid character `{char}`"
                )));
            }

            if char.to_lowercase().to_string() != char.to_string() {
                return Err(spanned.error(format!(
                    "name must be in lowercase, found invalid character `{char}`"
                )));
            }
        }

        Ok(Self(value.to_owned()))
    }
}

impl ToTokens for CommandName {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        self.0.to_tokens(tokens)
    }
}

impl From<CommandName> for String {
    fn from(value: CommandName) -> Self {
        value.0
    }
}

/// Slash command or command option description.
///
/// This validate that the description is between 1 and 100 characters.
#[derive(Clone, Debug)]
pub struct CommandDescription(String);

impl ParseAttribute for CommandDescription {
    fn parse_attribute(input: Lit) -> Result<Self> {
        let spanned: ParseSpanned<String> = ParseAttribute::parse_attribute(input)?;
        let value = spanned.inner.trim();

        match value.chars().count() {
            1..=100 => (),
            _ => return Err(spanned.error("description must be between 1 and 100 characters")),
        }

        Ok(Self(value.to_owned()))
    }
}

impl ToTokens for CommandDescription {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        self.0.to_tokens(tokens)
    }
}

impl From<CommandDescription> for String {
    fn from(value: CommandDescription) -> Self {
        value.0
    }
}

/// Slash command choice name.
///
/// This validate that the choice is between 1 and 100 characters.
/// https://discord.com/developers/docs/interactions/application-commands#application-command-object-application-command-option-choice-structure
#[derive(Clone, Debug)]
pub struct ChoiceName(String);

impl ParseAttribute for ChoiceName {
    fn parse_attribute(input: Lit) -> Result<Self> {
        let spanned: ParseSpanned<String> = ParseAttribute::parse_attribute(input)?;
        let value = spanned.inner.trim();

        match value.chars().count() {
            1..=100 => (),
            _ => return Err(spanned.error("name must be between 1 and 100 characters")),
        }

        Ok(Self(value.to_owned()))
    }
}

impl ToTokens for ChoiceName {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        self.0.to_tokens(tokens);
    }
}

impl From<ChoiceName> for String {
    fn from(value: ChoiceName) -> Self {
        value.0
    }
}