2020-12-05 21:37:16 -07:00
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use diesel::{result::Error, *};
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2020-12-21 16:27:42 -07:00
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use lemmy_db_queries::{ToSafe, ViewToVec};
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2020-12-18 11:38:32 -07:00
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use lemmy_db_schema::{
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schema::{community, community_moderator, person},
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source::{
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community::{Community, CommunitySafe},
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person::{Person, PersonSafe},
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},
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CommunityId,
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PersonId,
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};
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2020-12-05 21:37:16 -07:00
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use serde::Serialize;
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#[derive(Debug, Serialize, Clone)]
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pub struct CommunityModeratorView {
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pub community: CommunitySafe,
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pub moderator: PersonSafe,
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}
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type CommunityModeratorViewTuple = (CommunitySafe, PersonSafe);
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2020-12-05 21:37:16 -07:00
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impl CommunityModeratorView {
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pub fn for_community(conn: &PgConnection, community_id: CommunityId) -> Result<Vec<Self>, Error> {
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let res = community_moderator::table
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.inner_join(community::table)
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.inner_join(person::table)
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.select((
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Community::safe_columns_tuple(),
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Person::safe_columns_tuple(),
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))
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.filter(community_moderator::community_id.eq(community_id))
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.order_by(community_moderator::published)
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.load::<CommunityModeratorViewTuple>(conn)?;
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Ok(Self::from_tuple_to_vec(res))
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}
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pub fn for_person(conn: &PgConnection, person_id: PersonId) -> Result<Vec<Self>, Error> {
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let res = community_moderator::table
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.inner_join(community::table)
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.inner_join(person::table)
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.select((
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Community::safe_columns_tuple(),
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Person::safe_columns_tuple(),
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))
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.filter(community_moderator::person_id.eq(person_id))
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.order_by(community_moderator::published)
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.load::<CommunityModeratorViewTuple>(conn)?;
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Ok(Self::from_tuple_to_vec(res))
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}
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/// Finds all communities first mods / creators
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/// Ideally this should be a group by, but diesel doesn't support it yet
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pub fn get_community_first_mods(conn: &PgConnection) -> Result<Vec<Self>, Error> {
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let res = community_moderator::table
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.inner_join(community::table)
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.inner_join(person::table)
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.select((
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Community::safe_columns_tuple(),
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Person::safe_columns_tuple(),
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))
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// A hacky workaround instead of group_bys
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// https://stackoverflow.com/questions/24042359/how-to-join-only-one-row-in-joined-table-with-postgres
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.distinct_on(community_moderator::community_id)
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.order_by((
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community_moderator::community_id,
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community_moderator::person_id,
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))
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.load::<CommunityModeratorViewTuple>(conn)?;
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Ok(Self::from_tuple_to_vec(res))
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}
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}
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2020-12-10 18:39:42 -07:00
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impl ViewToVec for CommunityModeratorView {
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type DbTuple = CommunityModeratorViewTuple;
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fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
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items
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.iter()
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.map(|a| Self {
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community: a.0.to_owned(),
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moderator: a.1.to_owned(),
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})
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.collect::<Vec<Self>>()
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}
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}
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