lemmy/crates/db_views/src/custom_emoji_view.rs

86 lines
2.7 KiB
Rust

use crate::structs::CustomEmojiView;
use diesel::{result::Error, ExpressionMethods, JoinOnDsl, NullableExpressionMethods, QueryDsl};
use diesel_async::RunQueryDsl;
use lemmy_db_schema::{
newtypes::{CustomEmojiId, LocalSiteId},
schema::{custom_emoji, custom_emoji_keyword},
source::{custom_emoji::CustomEmoji, custom_emoji_keyword::CustomEmojiKeyword},
utils::{get_conn, DbPool},
};
use std::collections::HashMap;
type CustomEmojiTuple = (CustomEmoji, Option<CustomEmojiKeyword>);
impl CustomEmojiView {
pub async fn get(pool: &mut DbPool<'_>, emoji_id: CustomEmojiId) -> Result<Self, Error> {
let conn = &mut get_conn(pool).await?;
let emojis = custom_emoji::table
.find(emoji_id)
.left_join(
custom_emoji_keyword::table.on(custom_emoji_keyword::custom_emoji_id.eq(custom_emoji::id)),
)
.select((
custom_emoji::all_columns,
custom_emoji_keyword::all_columns.nullable(), // (or all the columns if you want)
))
.load::<CustomEmojiTuple>(conn)
.await?;
if let Some(emoji) = CustomEmojiView::from_tuple_to_vec(emojis)
.into_iter()
.next()
{
Ok(emoji)
} else {
Err(diesel::result::Error::NotFound)
}
}
pub async fn get_all(
pool: &mut DbPool<'_>,
for_local_site_id: LocalSiteId,
) -> Result<Vec<Self>, Error> {
let conn = &mut get_conn(pool).await?;
let emojis = custom_emoji::table
.filter(custom_emoji::local_site_id.eq(for_local_site_id))
.left_join(
custom_emoji_keyword::table.on(custom_emoji_keyword::custom_emoji_id.eq(custom_emoji::id)),
)
.order(custom_emoji::category)
.then_order_by(custom_emoji::id)
.select((
custom_emoji::all_columns,
custom_emoji_keyword::all_columns.nullable(), // (or all the columns if you want)
))
.load::<CustomEmojiTuple>(conn)
.await?;
Ok(CustomEmojiView::from_tuple_to_vec(emojis))
}
fn from_tuple_to_vec(items: Vec<CustomEmojiTuple>) -> Vec<Self> {
let mut result = Vec::new();
let mut hash: HashMap<CustomEmojiId, Vec<CustomEmojiKeyword>> = HashMap::new();
for item in &items {
let emoji_id: CustomEmojiId = item.0.id;
if let std::collections::hash_map::Entry::Vacant(e) = hash.entry(emoji_id) {
e.insert(Vec::new());
result.push(CustomEmojiView {
custom_emoji: item.0.clone(),
keywords: Vec::new(),
})
}
if let Some(item_keyword) = &item.1 {
if let Some(keywords) = hash.get_mut(&emoji_id) {
keywords.push(item_keyword.clone())
}
}
}
for emoji in &mut result {
if let Some(keywords) = hash.get_mut(&emoji.custom_emoji.id) {
emoji.keywords = keywords.clone();
}
}
result
}
}