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

//! Type information structs for dynamic resources.
use std::str::FromStr;

use crate::TypeMeta;
use serde::{Deserialize, Serialize};
use thiserror::Error;

#[derive(Debug, Error)]
#[error("failed to parse group version: {0}")]
/// Failed to parse group version
pub struct ParseGroupVersionError(pub String);

/// Core information about an API Resource.
#[derive(Deserialize, Serialize, Debug, Clone, PartialEq, Eq, Hash)]
pub struct GroupVersionKind {
    /// API group
    pub group: String,
    /// Version
    pub version: String,
    /// Kind
    pub kind: String,
}

impl GroupVersionKind {
    /// Construct from explicit group, version, and kind
    pub fn gvk(group_: &str, version_: &str, kind_: &str) -> Self {
        let version = version_.to_string();
        let group = group_.to_string();
        let kind = kind_.to_string();

        Self { group, version, kind }
    }
}

impl TryFrom<&TypeMeta> for GroupVersionKind {
    type Error = ParseGroupVersionError;

    fn try_from(tm: &TypeMeta) -> Result<Self, Self::Error> {
        Ok(GroupVersion::from_str(&tm.api_version)?.with_kind(&tm.kind))
    }
}
impl TryFrom<TypeMeta> for GroupVersionKind {
    type Error = ParseGroupVersionError;

    fn try_from(tm: TypeMeta) -> Result<Self, Self::Error> {
        Ok(GroupVersion::from_str(&tm.api_version)?.with_kind(&tm.kind))
    }
}

/// Core information about a family of API Resources
#[derive(Deserialize, Serialize, Debug, Clone, PartialEq, Eq, Hash)]
pub struct GroupVersion {
    /// API group
    pub group: String,
    /// Version
    pub version: String,
}

impl GroupVersion {
    /// Construct from explicit group and version
    pub fn gv(group_: &str, version_: &str) -> Self {
        let version = version_.to_string();
        let group = group_.to_string();
        Self { group, version }
    }

    /// Upgrade a GroupVersion to a GroupVersionKind
    pub fn with_kind(self, kind: &str) -> GroupVersionKind {
        GroupVersionKind {
            group: self.group,
            version: self.version,
            kind: kind.into(),
        }
    }
}

impl FromStr for GroupVersion {
    type Err = ParseGroupVersionError;

    fn from_str(gv: &str) -> Result<Self, Self::Err> {
        let gvsplit = gv.splitn(2, '/').collect::<Vec<_>>();
        let (group, version) = match *gvsplit.as_slice() {
            [g, v] => (g.to_string(), v.to_string()), // standard case
            [v] => ("".to_string(), v.to_string()),   // core v1 case
            _ => return Err(ParseGroupVersionError(gv.into())),
        };
        Ok(Self { group, version })
    }
}

impl GroupVersion {
    /// Generate the apiVersion string used in a kind's yaml
    pub fn api_version(&self) -> String {
        if self.group.is_empty() {
            self.version.clone()
        } else {
            format!("{}/{}", self.group, self.version)
        }
    }
}
impl GroupVersionKind {
    /// Generate the apiVersion string used in a kind's yaml
    pub fn api_version(&self) -> String {
        if self.group.is_empty() {
            self.version.clone()
        } else {
            format!("{}/{}", self.group, self.version)
        }
    }
}

/// Represents a type-erased object resource.
#[derive(Deserialize, Serialize, Debug, Clone, PartialEq, Eq, Hash)]
pub struct GroupVersionResource {
    /// API group
    pub group: String,
    /// Version
    pub version: String,
    /// Resource
    pub resource: String,
    /// Concatenation of group and version
    #[serde(default)]
    api_version: String,
}

impl GroupVersionResource {
    /// Set the api group, version, and the plural resource name.
    pub fn gvr(group_: &str, version_: &str, resource_: &str) -> Self {
        let version = version_.to_string();
        let group = group_.to_string();
        let resource = resource_.to_string();
        let api_version = if group.is_empty() {
            version.to_string()
        } else {
            format!("{}/{}", group, version)
        };

        Self {
            group,
            version,
            resource,
            api_version,
        }
    }
}

#[cfg(test)]
mod tests {
    #[test]
    fn gvk_yaml() {
        use crate::{GroupVersionKind, TypeMeta};
        let input = r#"---
apiVersion: kube.rs/v1
kind: Example
metadata:
  name: doc1
"#;
        let tm: TypeMeta = serde_yaml::from_str(input).unwrap();
        let gvk = GroupVersionKind::try_from(&tm).unwrap(); // takes ref
        let gvk2: GroupVersionKind = tm.try_into().unwrap(); // takes value
        assert_eq!(gvk.kind, "Example");
        assert_eq!(gvk.group, "kube.rs");
        assert_eq!(gvk.version, "v1");
        assert_eq!(gvk.kind, gvk2.kind);
    }
}