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
177
178
179
180
181
182

use axum::http::StatusCode;
use axum::response::IntoResponse;
use axum::response::Response;
use axum::Json;
use hyper::Error as HyperError;
use notify::Error as NotifyError;
use serde_json::json;
use sqlx::Error as SqlxError;
use std::io::Error as IoError;
use std::path::PathBuf;
use thiserror::Error;
use tokio::task::JoinError;

#[derive(Error, Debug)]
pub enum ServerError {
    /// returned if the current directory path cannot be read
    #[error("could not create path '{0}' for the embedded server files")]
    CreateDir(PathBuf),

    /// returned if any of the embedded worker files cannot be written to disk
    #[error("could not write an embedded server file: {0}")]
    WriteFile(String),

    /// returned if the version of the existing worker files cannot be read
    #[error("could not read the previously extracted embedded file versions")]
    ReadVersion,

    /// returned if a connection to the sqlite database could not be made
    #[error("could not connect to the sqlite database: {0}")]
    ConnectToDatabase(SqlxError),

    /// returned if an sqlite database file cannot be created
    #[error("could not create an sqlite database file: {0}")]
    CreateDatabase(SqlxError),

    /// returned if an sqlite query returns an error
    #[error("could not query the sqlite database: {0}")]
    QueryDatabase(SqlxError),

    /// returned if sqlx returns an unknown error
    #[error("encountered an unknown sqlite error: {0}")]
    UnknownSqliteError(SqlxError),

    /// returned if the sqlite bridge cannot be started
    #[error("the bridge api encountered an error: {0}")]
    BridgeApi(#[from] HyperError),

    /// returned if the miniflare command returns an error
    #[error("miniflare encountered an error: {0}")]
    MiniflareCommandError(IoError),

    /// returned if the miniflare command exits unsuccessfully
    #[error("miniflare encountered an error\ncause:\n{0}")]
    MiniflareError(String),

    /// returned if the schema parser command returns an error
    #[error(transparent)]
    SchemaParserError(IoError),

    /// returned if reading the parser result fails
    #[error(transparent)]
    SchemaParserResultRead(IoError),

    /// returned if the schema parser result is invalid JSON
    #[error("schema parser result is malformed JSON:\n{0}")]
    SchemaParserResultJson(serde_json::Error),

    /// returned if writing the schema registry fails
    #[error(transparent)]
    SchemaRegistryWrite(IoError),

    /// returned if `tempfile::NamedTempFile::new()` fails.
    #[error("could not create a temporary file for the parser result: {0}")]
    CreateTemporaryFile(IoError),

    /// returned if a write to a resolver artifact file fails
    #[error("could not create an output artifact file during a resolver build")]
    CreateResolverArtifactFile(IoError),

    /// returned if the schema parser command exits unsuccessfully
    #[error("could not extract the resolver wrapper worker contents")]
    ExtractResolverWrapperWorkerContents(String),

    /// returned if the schema parser command exits unsuccessfully
    #[error("could not parse grafbase/schema.graphql\n{0}")]
    ParseSchema(String),

    #[error("could not find a resolver referenced in the schema under the path {0}.{{js,ts}}")]
    ResolverDoesNotExist(PathBuf),

    /// returned if any of the npm commands ran during resolver build exits unsuccessfully
    #[error("npm encountered an error: {0}")]
    NpmCommandError(IoError),

    /// returned if any of the npm commands ran during resolver build exits unsuccessfully
    #[error("npm failed with output:\n{0}")]
    NpmCommand(String),

    /// returned if any of the npm commands ran during resolver build exits unsuccessfully
    #[error("resolver {0} failed to build:\n{1}")]
    ResolverBuild(String, String),

    /// returned if the user project path is not valid utf-8
    #[error("non utf-8 path used for project")]
    ProjectPath,

    /// returned if the user cache path is not valid utf-8
    #[error("$HOME/.grafbase is a non utf8 path")]
    CachePath,

    /// returned if the `.grafbase` directory cannot be created
    #[error("could not create a project cache directory")]
    CreateCacheDir,

    /// returned if the `.grafbase/database` directory cannot be created
    #[error("could not create a project database directory\ncaused by: {0}")]
    CreateDatabaseDir(IoError),

    /// returned if the `.grafbase/database` directory cannot be read
    #[error("could not read the project database directory\ncaused by: {0}")]
    ReadDatabaseDir(IoError),

    /// returned if an available port cannot be found for the bridge server
    #[error("could not find an available port for the bridge server")]
    AvailablePort,

    /// returned if a spawned task panics
    #[error(transparent)]
    SpawnedTaskPanic(#[from] JoinError),

    /// returned if node is not in the user $PATH
    #[error("Node.js does not seem to be installed")]
    NodeInPath,

    /// returned if the installed version of node is unsupported
    #[error("Node.js version {0} is unsupported")]
    OutdatedNode(String, String),

    /// returned if the installed version of node could not be retreived
    #[error("Could not retrive the installed version of Node.js")]
    CheckNodeVersion,

    /// returned if a file watcher could not be initialized
    #[error("Could not initialize a file watcher: {0}")]
    FileWatcherInit(#[from] NotifyError),
}

impl From<SqlxError> for ServerError {
    fn from(error: SqlxError) -> Self {
        match error {
            SqlxError::RowNotFound
            | SqlxError::TypeNotFound { .. }
            | SqlxError::ColumnNotFound(_)
            | SqlxError::ColumnDecode { .. }
            | SqlxError::ColumnIndexOutOfBounds { .. }
            | SqlxError::Io(_)
            | SqlxError::Decode(_)
            | SqlxError::Database(_) => Self::QueryDatabase(error),

            SqlxError::Configuration(_)
            | SqlxError::Tls(_)
            | SqlxError::PoolTimedOut
            | SqlxError::Protocol(_)
            | SqlxError::PoolClosed
            | SqlxError::WorkerCrashed => Self::ConnectToDatabase(error),

            SqlxError::Migrate(_) => Self::CreateDatabase(error),

            _ => Self::UnknownSqliteError(error),
        }
    }
}

impl IntoResponse for ServerError {
    fn into_response(self) -> Response {
        let body = Json(json!({
            "error": self.to_string(),
        }));

        (StatusCode::INTERNAL_SERVER_ERROR, body).into_response()
    }
}