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

use crate::{OpenOptions, VFile, VMetadata, Vfs, VfsResult};
use async_std::prelude::*;
use async_std::{fs, path::PathBuf};
use async_trait::async_trait;

pub struct OsFs {
    root: PathBuf,
}

struct VOsMetadata {
    path: PathBuf,
    is_file: bool,
    len: u64,
}

impl OsFs {
    pub fn new(root: &str) -> Self {
        OsFs {
            root: PathBuf::from(root),
        }
    }

    fn get_path(&self, path: &str) -> PathBuf {
        let p = if path.starts_with('/') {
            &path[1..]
        } else {
            path
        };
        self.root.join(p)
    }
}

impl VMetadata for VOsMetadata {
    fn path(&self) -> &str {
        self.path.to_str().unwrap()
    }

    fn is_dir(&self) -> bool {
        !self.is_file
    }

    fn is_file(&self) -> bool {
        self.is_file
    }

    fn len(&self) -> u64 {
        self.len
    }
}

#[async_trait]
impl Vfs for OsFs {
    async fn exists(&self, path: &str) -> VfsResult<bool> {
        Ok(self.get_path(path).exists().await)
    }

    async fn metadata(&self, path: &str) -> VfsResult<Box<dyn VMetadata>> {
        let path = self.get_path(path);
        let metadata = path.metadata().await?;
        let vmetadata = if metadata.is_dir() {
            VOsMetadata {
                is_file: false,
                len: 0,
                path,
            }
        } else {
            VOsMetadata {
                is_file: true,
                len: metadata.len(),
                path,
            }
        };
        Ok(Box::new(vmetadata))
    }

    async fn mkdir(&self, path: &str) -> VfsResult<()> {
        Ok(fs::create_dir(self.get_path(path)).await?)
    }

    async fn mv(&self, from: &str, to: &str) -> VfsResult<()> {
        Ok(fs::rename(from, to).await?)
    }

    async fn open(&self, path: &str, options: OpenOptions) -> VfsResult<Box<dyn VFile>> {
        let file = fs::OpenOptions::new()
            .read(options.has_read())
            .write(options.has_write())
            .create(options.has_create())
            .append(options.has_append())
            .truncate(options.has_truncate())
            .open(self.get_path(path))
            .await?;
        Ok(Box::new(file))
    }

    async fn read_dir(
        &self,
        path: &str,
        skip_token: Option<String>,
    ) -> VfsResult<(Vec<Box<dyn VMetadata>>, Option<String>)> {
        let mut dir = fs::read_dir(".").await?;
        let mut list: Vec<Box<dyn VMetadata>> = Vec::new();
        while let Some(entry) = dir.next().await {
            let entry = entry?;
            let metadata = entry.metadata().await?;
            let path = entry.path();

            let vmetadata = if metadata.is_dir() {
                VOsMetadata {
                    is_file: false,
                    len: 0,
                    path,
                }
            } else {
                VOsMetadata {
                    is_file: true,
                    len: metadata.len(),
                    path,
                }
            };

            list.push(Box::new(vmetadata));
        }
        Ok((list, None))
    }

    async fn rm(&self, path: &str) -> VfsResult<()> {
        let path = self.get_path(path);
        let metadata = path.metadata().await?;
        if metadata.is_dir() {
            Ok(fs::remove_dir(path).await?)
        } else {
            Ok(fs::remove_file(path).await?)
        }
    }
}