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

#![allow(unused)]

use core::convert::TryFrom;
use melodium_common::descriptor::{
    Identifier, LoadingError, LoadingResult, PackageRequirement, Version, VersionReq,
};
use toml::{Table, Value};

#[derive(Debug)]
pub struct Compo {
    pub name: String,
    pub version: Version,
    pub requirements: Vec<PackageRequirement>,
    pub main: Option<Identifier>,
}

impl Compo {
    pub fn parse(composition: &str) -> LoadingResult<Self> {
        let composition = match composition.parse::<Table>() {
            Ok(table) => table,
            Err(_) => {
                return LoadingResult::new_failure(LoadingError::wrong_configuration(
                    178,
                    "[unreachable name]".to_string(),
                ))
            }
        };

        if let Some(Value::String(name)) = composition.get("name") {
            let name = name.clone();
            match Version::parse(
                match match composition.get("version") {
                    Some(val) => val,
                    None => {
                        return LoadingResult::new_failure(LoadingError::wrong_configuration(
                            180, name,
                        ))
                    }
                }
                .as_str()
                {
                    Some(val) => val,
                    None => {
                        return LoadingResult::new_failure(LoadingError::wrong_configuration(
                            181, name,
                        ))
                    }
                },
            ) {
                Ok(version) => {
                    let requirements = if let Some(Value::Table(dependencies)) =
                        composition.get("dependencies")
                    {
                        let mut deps = Vec::new();
                        for (package_name, version_req) in dependencies {
                            if let Some(version_req) = version_req.as_str() {
                                if let Ok(version_req) = VersionReq::parse(version_req) {
                                    deps.push(PackageRequirement {
                                        package: package_name.clone(),
                                        version_requirement: version_req,
                                    })
                                } else {
                                    return LoadingResult::new_failure(
                                        LoadingError::wrong_configuration(
                                            207,
                                            package_name.clone(),
                                        ),
                                    );
                                }
                            } else {
                                return LoadingResult::new_failure(
                                    LoadingError::wrong_configuration(206, package_name.clone()),
                                );
                            }
                        }
                        deps
                    } else {
                        Vec::new()
                    };

                    let main = composition
                        .get("main")
                        .and_then(|v| v.as_str())
                        .and_then(|v| Identifier::try_from(v).ok());

                    LoadingResult::new_success(Self {
                        name,
                        version,
                        requirements,
                        main,
                    })
                }
                Err(_) => {
                    return LoadingResult::new_failure(LoadingError::wrong_configuration(227, name))
                }
            }
        } else {
            return LoadingResult::new_failure(LoadingError::wrong_configuration(
                179,
                "[unreachable name]".to_string(),
            ));
        }
    }

    pub fn restitute(&self) -> String {
        let mut toml = Table::new();

        toml.insert("name".to_string(), Value::String(self.name.clone()));
        toml.insert(
            "version".to_string(),
            Value::String(self.version.to_string()),
        );
        if !self.requirements.is_empty() {
            let mut deps = Table::new();
            for requirement in &self.requirements {
                deps.insert(
                    requirement.package.clone(),
                    Value::String(requirement.version_requirement.to_string()),
                );
            }
            toml.insert("dependencies".to_string(), Value::Table(deps));
        }

        if let Some(main) = &self.main {
            toml.insert("main".to_string(), Value::String(main.to_string()));
        }

        toml::to_string_pretty(&toml).unwrap()
    }
}