ffs_cli/database/
mod.rs

1use std::collections::HashMap;
2use std::fs;
3use std::io::Write;
4
5use toml::Value;
6
7const DATABASE_DIR: &str = ".ffs";
8const DATABASE_FILENAME: &str = "database.toml";
9
10pub struct Database {
11    filename: String,
12    data: HashMap<String, String>,
13}
14
15impl Default for Database {
16    fn default() -> Self {
17        Self::new()
18    }
19}
20
21impl Database {
22    /// Creates a new database instance and loads data from the file.
23    ///
24    /// # Panics
25    ///
26    /// Panics if the database cannot be loaded from the file system.
27    #[must_use]
28    pub fn new() -> Self {
29        let mut db = Self {
30            filename: DATABASE_FILENAME.to_string(),
31            data: HashMap::new(),
32        };
33        db.load().unwrap();
34        db
35    }
36}
37
38impl Database {
39    /// Loads the database from the file system.
40    ///
41    /// # Errors
42    ///
43    /// Returns an error if the database cannot be loaded or created.
44    ///
45    /// # Panics
46    ///
47    /// Panics if the HOME environment variable is not set.
48    pub fn load(&mut self) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
49        let home = std::env::var("HOME").unwrap();
50        let database_dir = format!("{home}/{DATABASE_DIR}");
51        let database_file = format!("{database_dir}/{DATABASE_FILENAME}");
52        // create the database directory if it doesn't exist
53        if fs::metadata(&database_dir).is_err() {
54            println!("Creating database directory: {database_dir}");
55            fs::create_dir_all(database_dir)?;
56        }
57        // create the database file if it doesn't exist
58        if fs::metadata(&database_file).is_err() {
59            println!("Creating database file: {database_file}");
60            fs::File::create(&database_file)?;
61        }
62        let contents = fs::read_to_string(&database_file)?;
63        let value = contents.parse::<Value>()?;
64        let table = value.as_table().unwrap();
65        self.data = table
66            .iter()
67            .map(|(k, v)| (k.clone(), v.as_str().unwrap_or_default().to_string()))
68            .collect();
69        Ok(())
70    }
71
72    /// Sets a key-value pair in the database.
73    ///
74    /// # Errors
75    ///
76    /// Returns an error if the data cannot be written to the file.
77    pub fn set(
78        &mut self,
79        key: &str,
80        value: &str,
81    ) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
82        self.data.insert(key.to_string(), value.to_string());
83        let mut file = fs::File::create(&self.filename)?;
84        let toml = toml::to_string(&self.data)?;
85        file.write_all(toml.as_bytes())?;
86        Ok(())
87    }
88
89    #[must_use]
90    pub fn get(&self, key: &str) -> Option<String> {
91        self.data.get(key).cloned()
92    }
93}
ffs_cli/database/mod.rs

ffs_cli/database/
mod.rs
