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|
use rusqlite::Connection;
use error::{Result, LinoError};
use rand::{OsRng, Rng};
#[derive(Serialize, Debug, Clone)]
pub struct Quote {
id: i64,
date: String,
author: String,
score: String,
points: i32,
votes: i32,
content: String,
}
pub fn init(c: &Connection) -> Result<()> {
info!("Initializing db");
c.execute_batch(
r#"
CREATE TABLE IF NOT EXISTS quotes (
id INTEGER PRIMARY KEY AUTOINCREMENT,
approved BOOL DEFAULT 0,
quote_date DATE CHECK (DATE(quote_date, '+0 days') IS quote_date),
author TEXT NOT NULL,
content TEXT NOT NULL,
CONSTRAINT unique_content UNIQUE (quote_date, content)
);
CREATE TABLE IF NOT EXISTS votes (
id INTEGER PRIMARY KEY AUTOINCREMENT,
quote_id INTEGER NOT NULL,
score INTEGER NOT NULL,
FOREIGN KEY(quote_id) REFERENCES quotes(id)
);
CREATE TABLE IF NOT EXISTS keys (
id TEXT PRIMARY KEY,
value BLOB NOT NULL
);
"#,
)?;
let key = {
let mut v = vec![0u8; 32];
(OsRng::new()?).fill_bytes(v.as_mut());
v
};
c.execute(
r#"
INSERT OR IGNORE INTO keys (id, value) VALUES
('session', ?1);
"#,
&[&key],
)?;
Ok(())
}
pub fn populate_test_db(c: &Connection) -> Result<()> {
info!("Populating test db");
try!(c.execute_batch(
r#"
INSERT INTO quotes (id, approved, quote_date, author, content) VALUES
(1, 1, '2017-07-09', 'orbekk', 'test quote'),
(2, 1, '2017-07-09', 'orbekk', 'test quote2'),
(3, 0, '2017-07-09', 'orbekk', 'test quote3');
INSERT INTO votes (quote_id, score) VALUES
(1, 2),
(1, 3),
(1, 1),
(2, 1),
(2, 2);
"#,
));
Ok(())
}
pub fn get_key(c: &Connection, id: &str) -> Result<Vec<u8>> {
let key = c.query_row(
r#"
SELECT value FROM keys WHERE id = ?1
"#,
&[&id],
|row| row.get(0),
)?;
Ok(key)
}
pub fn new_quote(c: &Connection, date: &str, author: &str, content: &str) -> Result<()> {
c.execute(
r#"
INSERT INTO quotes (quote_date, author, content) VALUES
(?1, ?2, ?3);
"#,
&[&date, &author, &content],
)?;
info!("New quote added by {}", author);
Ok(())
}
pub fn new_vote(c: &Connection, quote_id: i64, score: i32) -> Result<()> {
c.execute(
r#"
INSERT INTO votes (quote_id, score) VALUES
(?1, ?2)
"#,
&["e_id, &score],
)?;
info!("New vote: quote_id({}) score({})", quote_id, score);
Ok(())
}
pub fn approve_quote(c: &Connection, quote_id: i64) -> Result<()> {
c.execute(
r#"
UPDATE quotes
SET approved = 1
WHERE id = ?1
"#,
&["e_id],
)?;
Ok(())
}
pub fn delete_quote(c: &Connection, quote_id: i64) -> Result<()> {
c.execute(
r#"
DELETE FROM quotes
WHERE id = ?1
"#,
&["e_id],
)?;
Ok(())
}
fn internal_get_quotes(
c: &Connection,
id: Option<i64>,
ordering: &str,
approved: bool,
) -> Result<Vec<Quote>> {
// Arguments:
// ?1: bool, whether to query for a specific quote
// ?2: i64, quote id to use if ?1 is true
// ?3: bool, whether to fetch approved or not approved quotes
let mut stmt = c.prepare(
r#"
SELECT q.id, q.quote_date, q.author, q.content,
COALESCE(sum(v.score), 0), count(v.score)
FROM quotes q
LEFT JOIN votes v ON (q.id = v.quote_id)
WHERE (?1 AND q.id = ?2) OR (NOT ?1 AND q.approved = ?3)
GROUP BY 1, 2, 3, 4;
ORDER BY q.id DESC;
"#,
)?;
let rows = stmt.query_map(
&[&id.is_some(), &id.unwrap_or(-1), &approved],
|row| {
let points = row.get(4);
let votes = row.get(5);
let score = if votes > 0 {
format!("{:.1}", points as f64 / votes as f64)
} else {
"—".to_string()
};
Quote {
id: row.get(0),
date: row.get(1),
author: row.get(2),
content: row.get(3),
score: score,
points: points,
votes: votes,
}
},
)?;
let result = rows.map(|r| r.map_err(|e| From::from(e)))
.collect::<Result<Vec<Quote>>>();
// For some reason, the ordering from sqlite doesn't work.
result.map(|mut queries| {
if ordering == "score" {
queries.sort_by_key(|q| if q.votes > 0 {
-(q.points / q.votes)
} else {
0
});
} else {
queries.sort_by_key(|q| -q.id);
}
queries
})
}
pub fn get_quotes(c: &Connection, ordering: &str) -> Result<Vec<Quote>> {
internal_get_quotes(c, None, ordering, true)
}
pub fn get_pending_quotes(c: &Connection) -> Result<Vec<Quote>> {
internal_get_quotes(c, None, "", false)
}
pub fn get_quote(c: &Connection, id: i64) -> Result<Quote> {
let quotes = internal_get_quotes(c, Some(id), "", true)?;
quotes.into_iter().next().ok_or(LinoError::NotFound(
format!("quote with id {}", id),
))
}
|
