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
167
168
169
170
171
172
173
174
175
176

//! This module contains types related to the OpenAPI types used in the Kubernetes spec.

mod definitions;
pub use self::definitions::*;

mod info;
pub use self::info::*;

mod paths;
pub use self::paths::*;

/// The value of an `x-kubernetes-group-version-kind` annotation on a type or an operation.
#[derive(Clone, Debug, Eq, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Deserialize))]
pub struct KubernetesGroupKindVersion {
    pub group: String,
    pub kind: String,
    pub version: String,
}

impl std::cmp::Ord for KubernetesGroupKindVersion {
    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
        self.group.cmp(&other.group)
        .then_with(|| self.version.cmp(&other.version))
        .then_with(|| self.kind.cmp(&other.kind))
    }
}

impl std::cmp::PartialOrd for KubernetesGroupKindVersion {
    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
        Some(self.cmp(other))
    }
}

/// The whole `Spec` object. An OpenAPI spec JSON file can be deserialized into this type.
#[derive(Debug)]
pub struct Spec {
    pub info: Info,
    pub definitions: std::collections::BTreeMap<DefinitionPath, Schema>,
    pub operations: Vec<Operation>,
}

#[cfg(feature = "serde")]
#[allow(clippy::use_self)]
impl<'de> serde::Deserialize<'de> for Spec {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: serde::Deserializer<'de> {
        #[derive(Debug, serde::Deserialize)]
        pub struct InnerSpec {
            swagger: String,
            info: Info,
            definitions: std::collections::BTreeMap<DefinitionPath, Schema>,
            paths: std::collections::BTreeMap<Path, InnerPathItem>,
        }

        #[derive(Debug, serde::Deserialize)]
        struct InnerPathItem {
            delete: Option<InnerOperation>,
            get: Option<InnerOperation>,
            patch: Option<InnerOperation>,
            post: Option<InnerOperation>,
            put: Option<InnerOperation>,
            #[serde(default)]
            parameters: Vec<std::sync::Arc<Parameter>>,
        }

        #[derive(Debug, serde::Deserialize)]
        struct InnerOperation {
            description: Option<String>,
            #[serde(rename = "operationId")]
            id: String,
            #[serde(rename = "x-kubernetes-action")]
            kubernetes_action: Option<KubernetesAction>,
            #[serde(rename = "x-kubernetes-group-version-kind")]
            kubernetes_group_kind_version: Option<KubernetesGroupKindVersion>,
            #[serde(default)]
            parameters: Vec<std::sync::Arc<Parameter>>,
            responses: std::collections::BTreeMap<String, InnerResponse>,
            tags: Option<(String,)>,
        }

        #[derive(Debug, serde::Deserialize)]
        struct InnerResponse {
            schema: Option<Schema>,
        }

        fn parse_operation<'de, D>(
            value: InnerOperation,
            method: Method,
            path: Path,
            mut parameters: Vec<std::sync::Arc<Parameter>>,
        ) -> Result<Operation, D::Error> where D: serde::Deserializer<'de> {
            let responses: Result<_, _> =
                value.responses.into_iter()
                .filter_map(|(status_code_str, response)| {
                    let Ok(status_code) = status_code_str.parse() else {
                        return Some(Err(serde::de::Error::invalid_value(
                            serde::de::Unexpected::Str(&status_code_str),
                            &"string representation of an HTTP status code")));
                    };
                    let schema = response.schema?;
                    Some(Ok((status_code, schema)))
                })
                .collect();

            for parameter in value.parameters {
                if let Some(p) = parameters.iter_mut().find(|p| p.name == parameter.name) {
                    *p = parameter;
                }
                else {
                    parameters.push(parameter);
                }
            }

            if method == Method::Get {
                for parameter in &parameters {
                    if parameter.location == ParameterLocation::Body {
                        return Err(serde::de::Error::custom(format!("Operation {} has method GET but has a body parameter {}", value.id, parameter.name)));
                    }
                }
            }

            Ok(Operation {
                description: value.description,
                id: value.id,
                path,
                kubernetes_action: value.kubernetes_action,
                kubernetes_group_kind_version: value.kubernetes_group_kind_version,
                method,
                parameters,
                responses: OperationResponses::Map(responses?),
                tag: value.tags.map(|t|t.0),
            })
        }

        let result: InnerSpec = serde::Deserialize::deserialize(deserializer)?;

        if result.swagger != "2.0" {
            return Err(serde::de::Error::invalid_value(serde::de::Unexpected::Str(&result.swagger), &"2.0"));
        }

        let mut operations = vec![];

        for (path, path_item) in result.paths {
            if let Some(delete) = path_item.delete {
                operations.push(parse_operation::<D>(delete, Method::Delete, path.clone(), path_item.parameters.clone())?);
            }

            if let Some(get) = path_item.get {
                operations.push(parse_operation::<D>(get, Method::Get, path.clone(), path_item.parameters.clone())?);
            }

            if let Some(patch) = path_item.patch {
                operations.push(parse_operation::<D>(patch, Method::Patch, path.clone(), path_item.parameters.clone())?);
            }

            if let Some(post) = path_item.post {
                operations.push(parse_operation::<D>(post, Method::Post, path.clone(), path_item.parameters.clone())?);
            }

            if let Some(put) = path_item.put {
                operations.push(parse_operation::<D>(put, Method::Put, path, path_item.parameters)?);
            }
        }

        let mut operation_ids: std::collections::BTreeSet<_> = Default::default();
        for operation in &operations {
            assert!(operation_ids.insert(&operation.id));
        }

        Ok(Spec {
            info: result.info,
            definitions: result.definitions,
            operations,
        })
    }
}