databend_client/
stage.rs

1// Copyright 2021 Datafuse Labs
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15use crate::error::{Error, Result};
16
17pub struct StageLocation {
18    pub name: String,
19    pub path: String,
20}
21
22impl std::fmt::Display for StageLocation {
23    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
24        write!(f, "@{}/{}", self.name, self.path)
25    }
26}
27
28impl TryFrom<&str> for StageLocation {
29    type Error = Error;
30    fn try_from(s: &str) -> Result<Self> {
31        if !s.starts_with('@') {
32            return Err(Error::BadArgument(format!("Invalid stage location: {s}")));
33        }
34        let mut parts = s.splitn(2, '/');
35        let name = parts
36            .next()
37            .ok_or_else(|| Error::BadArgument(format!("Invalid stage location: {s}")))?
38            .trim_start_matches('@');
39        let path = parts.next().unwrap_or_default();
40        Ok(Self {
41            name: name.to_string(),
42            path: path.to_string(),
43        })
44    }
45}
46
47impl StageLocation {
48    pub fn file_path(&self, file_name: &str) -> String {
49        if self.path.ends_with('/') {
50            format!("{self}{file_name}")
51        } else {
52            format!("{self}/{file_name}")
53        }
54    }
55}
56
57#[cfg(test)]
58mod test {
59    use super::*;
60
61    #[test]
62    fn parse_stage() -> Result<()> {
63        let location = "@stage_name/path/to/file";
64        let stage = StageLocation::try_from(location)?;
65        assert_eq!(stage.name, "stage_name");
66        assert_eq!(stage.path, "path/to/file");
67        Ok(())
68    }
69
70    #[test]
71    fn parse_stage_empty_path() -> Result<()> {
72        let location = "@stage_name";
73        let stage = StageLocation::try_from(location)?;
74        assert_eq!(stage.name, "stage_name");
75        assert_eq!(stage.path, "");
76        Ok(())
77    }
78
79    #[test]
80    fn parse_stage_fail() -> Result<()> {
81        let location = "stage_name/path/to/file";
82        let stage = StageLocation::try_from(location);
83        assert!(stage.is_err());
84        Ok(())
85    }
86}
databend_client/stage.rs

databend_client/
stage.rs
