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

#[macro_use] extern crate lazy_static;
extern crate regex;

mod markdown;

use regex::{Regex, RegexBuilder};
use std::path::{Path, PathBuf};
use std::collections::HashMap;
use std::error;
use std::io;
use std::fs;
use std::fmt;

//mod markdown;

#[derive(Debug)]
#[derive(Clone)]
pub struct Metadata {
    pathbuf: PathBuf,
}

#[derive(Debug)]
pub struct GemlFile {
    pub gemls: Vec<Geml>,
    pub metadata: Metadata,
}

#[derive(Debug)]
pub enum GemlErrorKind {
    IoError(String),
    MarkdownError(&'static str),
    HtmlError(&'static str),
    ParseError(&'static str),
}

impl GemlErrorKind {
    pub fn unwrap(&self) -> &str {
        use crate::GemlErrorKind::*;
        match self {
            IoError(x) => &x,
            MarkdownError(x) => x,
            HtmlError(x) => x,
            ParseError(x) => x,
        }
    }
}

#[derive(Debug)]
pub struct GemlParseError(pub GemlErrorKind);

impl fmt::Display for GemlParseError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{:?}", self)
    }
}

impl error::Error for GemlParseError {
    fn description(&self) -> &str {
        self.0.unwrap()
    }
}

impl From<io::Error> for GemlParseError {
    fn from(err: io::Error) -> GemlParseError {
        use crate::GemlErrorKind::*;
        GemlParseError(IoError(err.to_string()))
    }
}

pub type Result<T> = std::result::Result<T, GemlParseError>;

impl GemlFile {
    pub fn from_path(path: &Path) -> Result<GemlFile> {
        let content = String::from_utf8_lossy(&fs::read(&path)?).to_string();
        GemlFile::from_string(content, path)
    }

    pub fn from_string(content: String, path: &Path) -> Result<GemlFile> {
        let gemls = Geml::deserialize(content)?;
        let pathbuf = path.to_owned();
        let metadata = Metadata { pathbuf, };
        Ok(GemlFile {
            gemls,
            metadata,
        })
    }

    pub fn parse(&self) -> Result<GemlFile> {
        let mut gemls: Vec<Geml> = vec![];
        for g in self.gemls.iter() {
            gemls.push(g.parse()?);
        }
        Ok(GemlFile {
            gemls,
            metadata: self.metadata.clone(),
        })
    }
}

#[derive(Debug)]
#[derive(Clone)]
pub struct Geml {
    pub key: String,
    pub value: String,
    pub tags: HashMap<String, String>,
}

fn reg(s: &str) -> regex::Regex {
    RegexBuilder::new(s)
        .multi_line(true)
        .build()
        .unwrap()
}

impl Geml {
    pub fn deserialize(s: String) -> Result<Vec<Geml>> {
        lazy_static!{
            static ref TAGS: Regex = reg(r"^#\[(.+?)\((.+?)\)\]");
            static ref RMWS: Regex = reg(r"\s*([\s\S]*)\s*");
        }
        Ok(s.split('$').collect::<Vec<&str>>()[1..]
            .chunks(2)
            .filter(|x| (x.len() == 2))
            .map(|x| {
                let mut val_start = 0;
                let mut tags = HashMap::new();
                for cap in TAGS.captures_iter(&x[1]) {
                    tags.insert(cap[1].to_string(), cap[2].to_string());
                    val_start = cap.get(0).unwrap().end();
                }
                let value = match RMWS.find(&x[1][val_start..]) {
                    Some(x) => x.as_str().to_owned(),
                    None => String::from(""),
                };
                Geml {
                    key: x[0].to_owned(),
                    value,
                    tags,
                }
            }).collect())
    }

    pub fn parse(&self) -> Result<Geml> {
        let mut value = self.value.clone();
        if self.tags.get(&"markdown".to_owned()).unwrap_or(&"enabled".to_owned()) == &"enabled".to_owned() {
            value = markdown::parse(value);
        }
        Ok(Geml {
            key: self.key.clone(),
            tags: self.tags.clone(),
            value: value,
        })
    }

    pub fn to_html(&self) -> Result<String> {
        Ok(self.parse()?.value.clone())
    }
}