Quote: Add initial quote plugin

1 files changed, 136 insertions, 0 deletions

diff --git a/src/plugins/quote/database.rs b/src/plugins/quote/database.rs
new file mode 100644
index 0000000..6ad08a0
--- /dev/null
+++ b/src/plugins/quote/database.rs
@@ -0,0 +1,136 @@
+use std::collections::HashMap;
+#[cfg(feature = "mysql")]
+use std::sync::Arc;
+
+#[cfg(feature = "mysql")]
+use diesel::mysql::MysqlConnection;
+#[cfg(feature = "mysql")]
+use diesel::prelude::*;
+#[cfg(feature = "mysql")]
+use failure::ResultExt;
+#[cfg(feature = "mysql")]
+use r2d2::Pool;
+#[cfg(feature = "mysql")]
+use r2d2_diesel::ConnectionManager;
+
+use chrono::NaiveDateTime;
+
+use super::error::*;
+
+#[cfg_attr(feature = "mysql", derive(Queryable))]
+#[derive(Clone, Debug)]
+pub struct Quote {
+    pub quotee: String,
+    pub channel: String,
+    pub idx: i32,
+    pub content: String,
+    pub author: String,
+    pub created: NaiveDateTime,
+}
+
+#[cfg_attr(feature = "mysql", derive(Insertable))]
+#[cfg_attr(feature = "mysql", table_name = "quotes")]
+pub struct NewQuote<'a> {
+    pub quotee: &'a str,
+    pub channel: &'a str,
+    pub idx: i32,
+    pub content: &'a str,
+    pub author: &'a str,
+    pub created: NaiveDateTime,
+}
+
+pub trait Database: Send + Sync {
+    fn insert_quote(&mut self, quote: &NewQuote) -> Result<(), QuoteError>;
+    fn get_quote(&self, quotee: &str, channel: &str, idx: i32) -> Result<Quote, QuoteError>;
+    fn count_quotes(&self, quotee: &str, channel: &str) -> Result<i32, QuoteError>;
+}
+
+// HashMap
+impl<S: ::std::hash::BuildHasher + Send + Sync> Database for HashMap<(String, String, i32), Quote, S> {
+    fn insert_quote(&mut self, quote: &NewQuote) -> Result<(), QuoteError> {
+        let quote = Quote {
+            quotee: quote.quotee.to_owned(),
+            channel: quote.channel.to_owned(),
+            idx: quote.idx,
+            content: quote.content.to_owned(),
+            author: quote.author.to_owned(),
+            created: quote.created,
+        };
+
+        let quotee = quote.quotee.clone();
+        let channel = quote.channel.clone();
+        match self.insert((quotee, channel, quote.idx), quote) {
+            None => Ok(()),
+            Some(_) => Err(ErrorKind::Duplicate)?,
+        }
+    }
+
+    fn get_quote(&self, quotee: &str, channel: &str, idx: i32) -> Result<Quote, QuoteError> {
+        Ok(self.get(&(quotee.to_owned(), channel.to_owned(), idx))
+            .cloned()
+            .ok_or(ErrorKind::NotFound)?)
+    }
+
+    fn count_quotes(&self, quotee: &str, channel: &str) -> Result<i32, QuoteError> {
+        Ok(self.iter().filter(|&(&(ref n, ref c, _), _)| n == quotee && c == channel).count() as i32)
+    }
+}
+
+// Diesel automatically defines the quotes module as public.
+// We create a schema module to keep it private.
+#[cfg(feature = "mysql")]
+mod schema {
+    table! {
+        quotes (quotee, channel, idx) {
+            quotee -> Varchar,
+            channel -> Varchar,
+            idx -> Integer,
+            content -> Text,
+            author -> Varchar,
+            created -> Timestamp,
+        }
+    }
+}
+
+#[cfg(feature = "mysql")]
+use self::schema::quotes;
+
+#[cfg(feature = "mysql")]
+impl Database for Arc<Pool<ConnectionManager<MysqlConnection>>> {
+    fn insert_quote(&mut self, quote: &NewQuote) -> Result<(), QuoteError> {
+        use diesel;
+
+        let conn = &*self.get().context(ErrorKind::NoConnection)?;
+        diesel::insert_into(quotes::table)
+            .values(quote)
+            .execute(conn)
+            .context(ErrorKind::MysqlError)?;
+
+        Ok(())
+    }
+
+    fn get_quote(&self, quotee: &str, channel: &str, idx: i32) -> Result<Quote, QuoteError> {
+        let conn = &*self.get().context(ErrorKind::NoConnection)?;
+        Ok(quotes::table
+            .find((quotee, channel, idx))
+            .first(conn)
+            .context(ErrorKind::MysqlError)?)
+    }
+
+    fn count_quotes(&self, quotee: &str, channel: &str) -> Result<i32, QuoteError> {
+        use diesel;
+
+        let conn = &*self.get().context(ErrorKind::NoConnection)?;
+        let count: Result<i64, _> = quotes::table
+            .filter(quotes::columns::quotee.eq(quotee))
+            .filter(quotes::columns::channel.eq(channel))
+            .count()
+            .get_result(conn);
+
+        match count {
+            Ok(c) => Ok(c as i32),
+            Err(diesel::NotFound) => Ok(0),
+            Err(e) => Err(e).context(ErrorKind::MysqlError)?,
+        }
+    }
+}