summary refs log tree commit diff stats
path: root/src/db.rs
blob: 02cd7763f1fdb06c828a9091d3b5490beed0de84 (plain) (blame)
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
use fd_lock::FdLock;
use serde::{Deserialize, Serialize};

use std::fs;
use std::fs::File;

use crate::conf;
use crate::error;

#[cfg(test)]
pub const PATH: &str = "clinte.json";

#[cfg(not(test))]
pub const PATH: &str = "/usr/local/clinte/clinte.json";

#[derive(Clone, Debug, Deserialize, Serialize)]
pub struct Post {
    pub title: String,
    pub author: String,
    pub body: String,
}

#[derive(Debug, Deserialize, Serialize)]
pub struct Posts {
    pub posts: Vec<Post>,
}

#[derive(Debug)]
pub struct Conn {
    pub conn: FdLock<std::fs::File>,
}

impl Conn {
    pub fn init(path: &str) -> Self {
        if *conf::DEBUG {
            log::info!("Opening clinte.json");
        }

        let file = error::helper(File::open(path), "Couldn't open clinte.json");

        Self {
            conn: FdLock::new(file),
        }
    }
}

impl Posts {
    pub fn get_all(path: &str) -> Self {
        if *conf::DEBUG {
            log::info!("Retrieving posts...");
        }

        let mut db = Conn::init(path);
        let _guard = error::helper(db.conn.try_lock(), "Couldn't acquire lock on clinte.json");
        let strdata = error::helper(fs::read_to_string(PATH), "Couldn't read clinte.json");
        let out: Self = error::helper(serde_json::from_str(&strdata), "Couldn't parse clinte.json");

        out
    }

    pub fn replace(&mut self, n: usize, post: Post) {
        self.posts[n] = post;
    }

    pub fn get(&self, n: usize) -> Post {
        self.posts[n].clone()
    }

    pub fn append(&mut self, post: Post) {
        self.posts.push(post);
    }

    pub fn delete(&mut self, n: usize) {
        self.posts.remove(n);
    }

    pub fn write(&self) {
        let strdata = error::helper(
            serde_json::to_string_pretty(&self),
            "Couldn't serialize posts",
        );

        let mut db_fd = Conn::init(PATH);
        let _guard = error::helper(
            db_fd.conn.try_lock(),
            "Couldn't acquire lock on clinte.json",
        );
        error::helper(
            fs::write(PATH, &strdata),
            "Couldn't write data to clinte.json",
        );
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::user;

    #[test]
    fn retrieve_posts_and_crud() {
        let mut all = Posts::get_all(PATH);
        assert_eq!(all.posts.len(), 1);

        let post = all.get(0);
        assert_eq!(post.title, "Welcome to CLI NoTEs!");
        assert_eq!(post.author, "clinte!");
        assert_eq!(post.body, "Welcome to clinte! For usage, run 'clinte -h'");

        let user = &*user::NAME;

        all.append(Post {
            author: user.into(),
            title: String::from("TITLE_HERE"),
            body: String::from("BODY_HERE"),
        });

        all.write();
        let mut all = Posts::get_all(PATH);

        let post = all.get(1);
        assert_eq!(post.title, "TITLE_HERE");
        assert_eq!(post.author, *user);
        assert_eq!(post.body, "BODY_HERE");

        let post = Post {
            author: user.into(),
            title: "TITLE_GOES_HERE".into(),
            body: "BODY_GOES_HERE".into(),
        };

        all.replace(1, post);

        all.write();
        let mut all = Posts::get_all(PATH);

        let post = all.get(1);
        assert_eq!(post.title, "TITLE_GOES_HERE");
        assert_eq!(post.author, *user);
        assert_eq!(post.body, "BODY_GOES_HERE");

        all.delete(1);
        all.write();
    }
}