lunar-lib 0.6.1

Common utilities for lunar applications
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
144
145
146

use crate::formatter::{
    ErrorKind, FormatError, Render,
    condition::{Condition, ConditionalToken},
    format_args::FormatArg,
};

#[derive(Debug, Clone)]
pub(crate) struct Block<'a> {
    content: Vec<FormatArg<'a>>,
    prefix: Vec<FormatArg<'a>>,
    postfix: Vec<FormatArg<'a>>,
    fallback: Vec<FormatArg<'a>>,
    condition: Option<Condition<'a>>,
}

impl<'a> Render for Block<'a> {
    fn render(&self, format_table: &super::FormatTable) -> String {
        if let Some(condition) = &self.condition
            && !condition.solve(format_table)
        {
            return String::new();
        }

        let mut content = self.content.render(format_table);

        if content.is_empty() {
            let fallback = self.fallback.render(format_table);

            if fallback.is_empty() {
                return String::new();
            }

            content = fallback
        }

        let mut prefix = self.prefix.render(format_table);
        prefix.push_str(&content);
        prefix.push_str(&self.postfix.render(format_table));

        prefix
    }
}

#[derive(Debug, PartialEq, Eq)]
pub(super) enum BlockMode {
    Content,
    Prefix,
    Suffix,
    Fallback,
    Condition,
}

impl std::fmt::Display for BlockMode {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            BlockMode::Content => f.write_str("Content"),
            BlockMode::Prefix => f.write_str("Prefix"),
            BlockMode::Suffix => f.write_str("Suffix"),
            BlockMode::Fallback => f.write_str("Fallback"),
            BlockMode::Condition => f.write_str("Condition"),
        }
    }
}

impl BlockMode {
    pub fn to_str(&self) -> &'static str {
        match self {
            BlockMode::Content => panic!(
                "Attempted to turn BlockMode::Content into a &str. This mode should never be set, only defaulted to"
            ),
            BlockMode::Prefix => "<",
            BlockMode::Suffix => ">",
            BlockMode::Fallback => "?",
            BlockMode::Condition => "@",
        }
    }
}

pub(super) struct BlockBuilder<'a> {
    content: Vec<FormatArg<'a>>,
    prefix: Vec<FormatArg<'a>>,
    postfix: Vec<FormatArg<'a>>,
    fallback: Vec<FormatArg<'a>>,
    condition: Option<Condition<'a>>,
    mode: Vec<BlockMode>,
}

impl<'a> Default for BlockBuilder<'a> {
    fn default() -> Self {
        Self {
            content: Default::default(),
            prefix: Default::default(),
            postfix: Default::default(),
            fallback: Default::default(),
            condition: Default::default(),
            mode: vec![BlockMode::Content],
        }
    }
}

impl<'a> BlockBuilder<'a> {
    pub(super) fn build(self) -> Block<'a> {
        Block {
            content: self.content,
            prefix: self.prefix,
            postfix: self.postfix,
            fallback: self.fallback,
            condition: self.condition,
        }
    }

    pub(super) fn set_mode(&mut self, mode: BlockMode) -> Result<(), FormatError> {
        if self.mode.contains(&mode) {
            Err(FormatError::new(ErrorKind::DoubleDefinition(mode.to_str())))
        } else {
            self.mode.push(mode);
            Ok(())
        }
    }

    pub(super) fn push_arg(&mut self, arg: FormatArg<'a>) {
        let arg_list = match self.mode.last().unwrap() {
            BlockMode::Content => &mut self.content,
            BlockMode::Prefix => &mut self.prefix,
            BlockMode::Suffix => &mut self.postfix,
            BlockMode::Fallback => &mut self.fallback,
            BlockMode::Condition => {
                let condition = self.condition.get_or_insert(Condition::default());
                condition.tokens.push(ConditionalToken::Arg(arg));
                return;
            }
        };

        arg_list.push(arg);
    }

    pub(super) fn push_conditional_token(&mut self, token: ConditionalToken<'a>) {
        match self.mode.last().unwrap() {
            BlockMode::Condition => {
                let condition = self.condition.get_or_insert(Condition::default());
                condition.tokens.push(token);
            }
            _ => self.push_arg(FormatArg::Text(token.to_str())),
        }
    }
}