lemmy/crates/db_views/src/post_view.rs

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use crate::structs::PostView;
use diesel::{dsl::*, pg::Pg, result::Error, *};
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use lemmy_db_schema::{
aggregates::structs::PostAggregates,
newtypes::{CommunityId, DbUrl, LocalUserId, PersonId, PostId},
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schema::{
community,
community_block,
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community_follower,
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community_person_ban,
local_user_language,
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person,
person_block,
person_post_aggregates,
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post,
post_aggregates,
post_like,
post_read,
post_saved,
},
source::{
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community::{Community, CommunityFollower, CommunityPersonBan, CommunitySafe},
local_user::LocalUser,
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person::{Person, PersonSafe},
person_block::PersonBlock,
post::{Post, PostRead, PostSaved},
},
traits::{ToSafe, ViewToVec},
utils::{functions::hot_rank, fuzzy_search, limit_and_offset},
ListingType,
SortType,
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};
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use tracing::debug;
use typed_builder::TypedBuilder;
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type PostViewTuple = (
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Post,
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PersonSafe,
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CommunitySafe,
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Option<CommunityPersonBan>,
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PostAggregates,
Option<CommunityFollower>,
Option<PostSaved>,
Option<PostRead>,
Option<PersonBlock>,
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Option<i16>,
i64,
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);
sql_function!(fn coalesce(x: sql_types::Nullable<sql_types::BigInt>, y: sql_types::BigInt) -> sql_types::BigInt);
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impl PostView {
pub fn read(
conn: &mut PgConnection,
post_id: PostId,
my_person_id: Option<PersonId>,
) -> Result<Self, Error> {
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// The left join below will return None in this case
let person_id_join = my_person_id.unwrap_or(PersonId(-1));
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let (
post,
creator,
community,
creator_banned_from_community,
counts,
follower,
saved,
read,
creator_blocked,
post_like,
unread_comments,
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) = post::table
.find(post_id)
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.inner_join(person::table)
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.inner_join(community::table)
.left_join(
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community_person_ban::table.on(
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post::community_id
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.eq(community_person_ban::community_id)
.and(community_person_ban::person_id.eq(post::creator_id))
.and(
community_person_ban::expires
.is_null()
.or(community_person_ban::expires.gt(now)),
),
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),
)
.inner_join(post_aggregates::table)
.left_join(
community_follower::table.on(
post::community_id
.eq(community_follower::community_id)
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.and(community_follower::person_id.eq(person_id_join)),
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),
)
.left_join(
post_saved::table.on(
post::id
.eq(post_saved::post_id)
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.and(post_saved::person_id.eq(person_id_join)),
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),
)
.left_join(
post_read::table.on(
post::id
.eq(post_read::post_id)
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.and(post_read::person_id.eq(person_id_join)),
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),
)
.left_join(
person_block::table.on(
post::creator_id
.eq(person_block::target_id)
.and(person_block::person_id.eq(person_id_join)),
),
)
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.left_join(
post_like::table.on(
post::id
.eq(post_like::post_id)
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.and(post_like::person_id.eq(person_id_join)),
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),
)
.left_join(
person_post_aggregates::table.on(
post::id
.eq(person_post_aggregates::post_id)
.and(person_post_aggregates::person_id.eq(person_id_join)),
),
)
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.select((
post::all_columns,
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Person::safe_columns_tuple(),
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Community::safe_columns_tuple(),
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community_person_ban::all_columns.nullable(),
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post_aggregates::all_columns,
community_follower::all_columns.nullable(),
post_saved::all_columns.nullable(),
post_read::all_columns.nullable(),
person_block::all_columns.nullable(),
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post_like::score.nullable(),
coalesce(
post_aggregates::comments.nullable() - person_post_aggregates::read_comments.nullable(),
post_aggregates::comments,
),
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))
.first::<PostViewTuple>(conn)?;
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// If a person is given, then my_vote, if None, should be 0, not null
// Necessary to differentiate between other person's votes
let my_vote = if my_person_id.is_some() && post_like.is_none() {
Some(0)
} else {
post_like
};
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Ok(PostView {
post,
creator,
community,
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creator_banned_from_community: creator_banned_from_community.is_some(),
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counts,
subscribed: CommunityFollower::to_subscribed_type(&follower),
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saved: saved.is_some(),
read: read.is_some(),
creator_blocked: creator_blocked.is_some(),
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my_vote,
unread_comments,
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})
}
}
#[derive(TypedBuilder)]
#[builder(field_defaults(default))]
pub struct PostQuery<'a> {
#[builder(!default)]
conn: &'a mut PgConnection,
listing_type: Option<ListingType>,
sort: Option<SortType>,
creator_id: Option<PersonId>,
community_id: Option<CommunityId>,
community_actor_id: Option<DbUrl>,
local_user: Option<&'a LocalUser>,
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search_term: Option<String>,
url_search: Option<String>,
saved_only: Option<bool>,
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page: Option<i64>,
limit: Option<i64>,
}
impl<'a> PostQuery<'a> {
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pub fn list(self) -> Result<Vec<PostView>, Error> {
use diesel::dsl::*;
// The left join below will return None in this case
let person_id_join = self.local_user.map(|l| l.person_id).unwrap_or(PersonId(-1));
let local_user_id_join = self.local_user.map(|l| l.id).unwrap_or(LocalUserId(-1));
let mut query = post::table
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.inner_join(person::table)
.inner_join(community::table)
.left_join(
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community_person_ban::table.on(
post::community_id
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.eq(community_person_ban::community_id)
.and(community_person_ban::person_id.eq(post::creator_id))
.and(
community_person_ban::expires
.is_null()
.or(community_person_ban::expires.gt(now)),
),
),
)
.inner_join(post_aggregates::table)
.left_join(
community_follower::table.on(
post::community_id
.eq(community_follower::community_id)
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.and(community_follower::person_id.eq(person_id_join)),
),
)
.left_join(
post_saved::table.on(
post::id
.eq(post_saved::post_id)
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.and(post_saved::person_id.eq(person_id_join)),
),
)
.left_join(
post_read::table.on(
post::id
.eq(post_read::post_id)
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.and(post_read::person_id.eq(person_id_join)),
),
)
.left_join(
person_block::table.on(
post::creator_id
.eq(person_block::target_id)
.and(person_block::person_id.eq(person_id_join)),
),
)
.left_join(
community_block::table.on(
community::id
.eq(community_block::community_id)
.and(community_block::person_id.eq(person_id_join)),
),
)
.left_join(
post_like::table.on(
post::id
.eq(post_like::post_id)
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.and(post_like::person_id.eq(person_id_join)),
),
)
.left_join(
person_post_aggregates::table.on(
post::id
.eq(person_post_aggregates::post_id)
.and(person_post_aggregates::person_id.eq(person_id_join)),
),
)
.left_join(
local_user_language::table.on(
post::language_id
.eq(local_user_language::language_id)
.and(local_user_language::local_user_id.eq(local_user_id_join)),
),
)
.select((
post::all_columns,
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Person::safe_columns_tuple(),
Community::safe_columns_tuple(),
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community_person_ban::all_columns.nullable(),
post_aggregates::all_columns,
community_follower::all_columns.nullable(),
post_saved::all_columns.nullable(),
post_read::all_columns.nullable(),
person_block::all_columns.nullable(),
post_like::score.nullable(),
coalesce(
post_aggregates::comments.nullable() - person_post_aggregates::read_comments.nullable(),
post_aggregates::comments,
),
))
.into_boxed();
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if let Some(listing_type) = self.listing_type {
match listing_type {
ListingType::Subscribed => {
query = query.filter(community_follower::person_id.is_not_null())
}
ListingType::Local => {
query = query.filter(community::local.eq(true)).filter(
community::hidden
.eq(false)
.or(community_follower::person_id.eq(person_id_join)),
);
}
ListingType::All => {
query = query.filter(
community::hidden
.eq(false)
.or(community_follower::person_id.eq(person_id_join)),
)
}
}
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}
if let Some(community_id) = self.community_id {
query = query
.filter(post::community_id.eq(community_id))
.then_order_by(post_aggregates::stickied.desc());
}
if let Some(community_actor_id) = self.community_actor_id {
query = query
.filter(community::actor_id.eq(community_actor_id))
.then_order_by(post_aggregates::stickied.desc());
}
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if let Some(url_search) = self.url_search {
query = query.filter(post::url.eq(url_search));
}
if let Some(search_term) = self.search_term {
let searcher = fuzzy_search(&search_term);
query = query.filter(
post::name
.ilike(searcher.to_owned())
.or(post::body.ilike(searcher)),
);
}
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// If its for a specific person, show the removed / deleted
if let Some(creator_id) = self.creator_id {
query = query.filter(post::creator_id.eq(creator_id));
}
if !self.local_user.map(|l| l.show_nsfw).unwrap_or(false) {
query = query
.filter(post::nsfw.eq(false))
.filter(community::nsfw.eq(false));
};
if !self.local_user.map(|l| l.show_bot_accounts).unwrap_or(true) {
query = query.filter(person::bot_account.eq(false));
};
if self.saved_only.unwrap_or(false) {
query = query.filter(post_saved::id.is_not_null());
}
// Only hide the read posts, if the saved_only is false. Otherwise ppl with the hide_read
// setting wont be able to see saved posts.
else if !self.local_user.map(|l| l.show_read_posts).unwrap_or(true) {
query = query.filter(post_read::id.is_null());
}
if self.local_user.is_some() {
// Filter out the rows with missing languages
query = query.filter(local_user_language::id.is_not_null());
// Don't show blocked communities or persons
query = query.filter(community_block::person_id.is_null());
query = query.filter(person_block::person_id.is_null());
}
query = match self.sort.unwrap_or(SortType::Hot) {
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SortType::Active => query
.then_order_by(
hot_rank(
post_aggregates::score,
post_aggregates::newest_comment_time_necro,
)
.desc(),
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)
.then_order_by(post_aggregates::newest_comment_time_necro.desc()),
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SortType::Hot => query
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.then_order_by(hot_rank(post_aggregates::score, post_aggregates::published).desc())
.then_order_by(post_aggregates::published.desc()),
SortType::New => query.then_order_by(post_aggregates::published.desc()),
SortType::Old => query.then_order_by(post_aggregates::published.asc()),
SortType::NewComments => query.then_order_by(post_aggregates::newest_comment_time.desc()),
SortType::MostComments => query
.then_order_by(post_aggregates::comments.desc())
.then_order_by(post_aggregates::published.desc()),
SortType::TopAll => query
.then_order_by(post_aggregates::score.desc())
.then_order_by(post_aggregates::published.desc()),
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SortType::TopYear => query
.filter(post_aggregates::published.gt(now - 1.years()))
.then_order_by(post_aggregates::score.desc())
.then_order_by(post_aggregates::published.desc()),
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SortType::TopMonth => query
.filter(post_aggregates::published.gt(now - 1.months()))
.then_order_by(post_aggregates::score.desc())
.then_order_by(post_aggregates::published.desc()),
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SortType::TopWeek => query
.filter(post_aggregates::published.gt(now - 1.weeks()))
.then_order_by(post_aggregates::score.desc())
.then_order_by(post_aggregates::published.desc()),
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SortType::TopDay => query
.filter(post_aggregates::published.gt(now - 1.days()))
.then_order_by(post_aggregates::score.desc())
.then_order_by(post_aggregates::published.desc()),
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};
let (limit, offset) = limit_and_offset(self.page, self.limit)?;
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query = query
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.limit(limit)
.offset(offset)
.filter(post::removed.eq(false))
.filter(post::deleted.eq(false))
.filter(community::removed.eq(false))
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.filter(community::deleted.eq(false));
debug!("Post View Query: {:?}", debug_query::<Pg, _>(&query));
let res = query.load::<PostViewTuple>(self.conn)?;
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Ok(PostView::from_tuple_to_vec(res))
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}
}
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impl ViewToVec for PostView {
type DbTuple = PostViewTuple;
fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
items
.into_iter()
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.map(|a| Self {
post: a.0,
creator: a.1,
community: a.2,
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creator_banned_from_community: a.3.is_some(),
counts: a.4,
subscribed: CommunityFollower::to_subscribed_type(&a.5),
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saved: a.6.is_some(),
read: a.7.is_some(),
creator_blocked: a.8.is_some(),
my_vote: a.9,
unread_comments: a.10,
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})
.collect::<Vec<Self>>()
}
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}
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#[cfg(test)]
mod tests {
use crate::post_view::{PostQuery, PostView};
use diesel::PgConnection;
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use lemmy_db_schema::{
aggregates::structs::PostAggregates,
newtypes::LanguageId,
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source::{
community::*,
community_block::{CommunityBlock, CommunityBlockForm},
language::Language,
local_user::{LocalUser, LocalUserForm},
local_user_language::LocalUserLanguage,
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person::*,
person_block::{PersonBlock, PersonBlockForm},
post::*,
},
traits::{Blockable, Crud, Likeable},
utils::establish_unpooled_connection,
SortType,
SubscribedType,
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};
use serial_test::serial;
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struct Data {
inserted_person: Person,
inserted_local_user: LocalUser,
inserted_blocked_person: Person,
inserted_bot: Person,
inserted_community: Community,
inserted_post: Post,
}
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fn init_data(conn: &mut PgConnection) -> Data {
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let person_name = "tegan".to_string();
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let new_person = PersonForm {
name: person_name.to_owned(),
public_key: Some("pubkey".to_string()),
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..PersonForm::default()
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};
let inserted_person = Person::create(conn, &new_person).unwrap();
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let local_user_form = LocalUserForm {
person_id: Some(inserted_person.id),
password_encrypted: Some("".to_string()),
..Default::default()
};
let inserted_local_user = LocalUser::create(conn, &local_user_form).unwrap();
let new_bot = PersonForm {
name: "mybot".to_string(),
bot_account: Some(true),
public_key: Some("pubkey".to_string()),
..PersonForm::default()
};
let inserted_bot = Person::create(conn, &new_bot).unwrap();
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let new_community = CommunityForm {
name: "test_community_3".to_string(),
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title: "nada".to_owned(),
public_key: Some("pubkey".to_string()),
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..CommunityForm::default()
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};
let inserted_community = Community::create(conn, &new_community).unwrap();
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// Test a person block, make sure the post query doesn't include their post
let blocked_person = PersonForm {
name: person_name,
public_key: Some("pubkey".to_string()),
..PersonForm::default()
};
let inserted_blocked_person = Person::create(conn, &blocked_person).unwrap();
let post_from_blocked_person = PostForm {
name: "blocked_person_post".to_string(),
creator_id: inserted_blocked_person.id,
community_id: inserted_community.id,
language_id: Some(LanguageId(1)),
..PostForm::default()
};
Post::create(conn, &post_from_blocked_person).unwrap();
// block that person
let person_block = PersonBlockForm {
person_id: inserted_person.id,
target_id: inserted_blocked_person.id,
};
PersonBlock::block(conn, &person_block).unwrap();
// A sample post
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let new_post = PostForm {
name: "test post 3".to_string(),
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creator_id: inserted_person.id,
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community_id: inserted_community.id,
language_id: Some(LanguageId(47)),
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..PostForm::default()
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};
let inserted_post = Post::create(conn, &new_post).unwrap();
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let new_bot_post = PostForm {
name: "test bot post".to_string(),
creator_id: inserted_bot.id,
community_id: inserted_community.id,
..PostForm::default()
};
let _inserted_bot_post = Post::create(conn, &new_bot_post).unwrap();
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Data {
inserted_person,
inserted_local_user,
inserted_blocked_person,
inserted_bot,
inserted_community,
inserted_post,
}
}
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#[test]
#[serial]
fn post_listing_with_person() {
let conn = &mut establish_unpooled_connection();
let data = init_data(conn);
let local_user_form = LocalUserForm {
show_bot_accounts: Some(false),
..Default::default()
};
let inserted_local_user =
LocalUser::update(conn, data.inserted_local_user.id, &local_user_form).unwrap();
let read_post_listing = PostQuery::builder()
.conn(conn)
.sort(Some(SortType::New))
.community_id(Some(data.inserted_community.id))
.local_user(Some(&inserted_local_user))
.build()
.list()
.unwrap();
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let post_listing_single_with_person =
PostView::read(conn, data.inserted_post.id, Some(data.inserted_person.id)).unwrap();
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let mut expected_post_listing_with_user = expected_post_view(&data, conn);
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// Should be only one person, IE the bot post, and blocked should be missing
assert_eq!(1, read_post_listing.len());
assert_eq!(expected_post_listing_with_user, read_post_listing[0]);
expected_post_listing_with_user.my_vote = Some(0);
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assert_eq!(
expected_post_listing_with_user,
post_listing_single_with_person
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);
let local_user_form = LocalUserForm {
show_bot_accounts: Some(true),
..Default::default()
};
let inserted_local_user =
LocalUser::update(conn, data.inserted_local_user.id, &local_user_form).unwrap();
let post_listings_with_bots = PostQuery::builder()
.conn(conn)
.sort(Some(SortType::New))
.community_id(Some(data.inserted_community.id))
.local_user(Some(&inserted_local_user))
.build()
.list()
.unwrap();
// should include bot post which has "undetermined" language
assert_eq!(2, post_listings_with_bots.len());
cleanup(data, conn);
}
#[test]
#[serial]
fn post_listing_no_person() {
let conn = &mut establish_unpooled_connection();
let data = init_data(conn);
let read_post_listing_multiple_no_person = PostQuery::builder()
.conn(conn)
.sort(Some(SortType::New))
.community_id(Some(data.inserted_community.id))
.build()
.list()
.unwrap();
let read_post_listing_single_no_person =
PostView::read(conn, data.inserted_post.id, None).unwrap();
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let expected_post_listing_no_person = expected_post_view(&data, conn);
// Should be 2 posts, with the bot post, and the blocked
assert_eq!(3, read_post_listing_multiple_no_person.len());
assert_eq!(
expected_post_listing_no_person,
read_post_listing_multiple_no_person[1]
);
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assert_eq!(
expected_post_listing_no_person,
read_post_listing_single_no_person
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);
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cleanup(data, conn);
}
#[test]
#[serial]
fn post_listing_block_community() {
let conn = &mut establish_unpooled_connection();
let data = init_data(conn);
let community_block = CommunityBlockForm {
person_id: data.inserted_person.id,
community_id: data.inserted_community.id,
};
CommunityBlock::block(conn, &community_block).unwrap();
let read_post_listings_with_person_after_block = PostQuery::builder()
.conn(conn)
.sort(Some(SortType::New))
.community_id(Some(data.inserted_community.id))
.local_user(Some(&data.inserted_local_user))
.build()
.list()
.unwrap();
// Should be 0 posts after the community block
assert_eq!(0, read_post_listings_with_person_after_block.len());
CommunityBlock::unblock(conn, &community_block).unwrap();
cleanup(data, conn);
}
#[test]
#[serial]
fn post_listing_like() {
let conn = &mut establish_unpooled_connection();
let data = init_data(conn);
let post_like_form = PostLikeForm {
post_id: data.inserted_post.id,
person_id: data.inserted_person.id,
score: 1,
};
let inserted_post_like = PostLike::like(conn, &post_like_form).unwrap();
let expected_post_like = PostLike {
id: inserted_post_like.id,
post_id: data.inserted_post.id,
person_id: data.inserted_person.id,
published: inserted_post_like.published,
score: 1,
};
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assert_eq!(expected_post_like, inserted_post_like);
let like_removed =
PostLike::remove(conn, data.inserted_person.id, data.inserted_post.id).unwrap();
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assert_eq!(1, like_removed);
cleanup(data, conn);
}
#[test]
#[serial]
fn post_listing_person_language() {
let conn = &mut establish_unpooled_connection();
let data = init_data(conn);
let spanish_id = Language::read_id_from_code(conn, "es").unwrap();
let post_spanish = PostForm {
name: "asffgdsc".to_string(),
creator_id: data.inserted_person.id,
community_id: data.inserted_community.id,
language_id: Some(spanish_id),
..PostForm::default()
};
Post::create(conn, &post_spanish).unwrap();
let post_listings_all = PostQuery::builder()
.conn(conn)
.sort(Some(SortType::New))
.local_user(Some(&data.inserted_local_user))
.build()
.list()
.unwrap();
// no language filters specified, all posts should be returned
assert_eq!(3, post_listings_all.len());
let french_id = Language::read_id_from_code(conn, "fr").unwrap();
LocalUserLanguage::update_user_languages(
conn,
Some(vec![french_id]),
data.inserted_local_user.id,
)
.unwrap();
let post_listing_french = PostQuery::builder()
.conn(conn)
.sort(Some(SortType::New))
.local_user(Some(&data.inserted_local_user))
.build()
.list()
.unwrap();
// only one french language post should be returned
assert_eq!(1, post_listing_french.len());
assert_eq!(french_id, post_listing_french[0].post.language_id);
let undetermined_id = Language::read_id_from_code(conn, "und").unwrap();
LocalUserLanguage::update_user_languages(
conn,
Some(vec![french_id, undetermined_id]),
data.inserted_local_user.id,
)
.unwrap();
let post_listings_french_und = PostQuery::builder()
.conn(conn)
.sort(Some(SortType::New))
.local_user(Some(&data.inserted_local_user))
.build()
.list()
.unwrap();
// french post and undetermined language post should be returned
assert_eq!(2, post_listings_french_und.len());
assert_eq!(
undetermined_id,
post_listings_french_und[0].post.language_id
);
assert_eq!(french_id, post_listings_french_und[1].post.language_id);
cleanup(data, conn);
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}
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fn cleanup(data: Data, conn: &mut PgConnection) {
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let num_deleted = Post::delete(conn, data.inserted_post.id).unwrap();
Community::delete(conn, data.inserted_community.id).unwrap();
Person::delete(conn, data.inserted_person.id).unwrap();
Person::delete(conn, data.inserted_bot.id).unwrap();
Person::delete(conn, data.inserted_blocked_person.id).unwrap();
assert_eq!(1, num_deleted);
}
fn expected_post_view(data: &Data, conn: &mut PgConnection) -> PostView {
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let (inserted_person, inserted_community, inserted_post) = (
&data.inserted_person,
&data.inserted_community,
&data.inserted_post,
);
let agg = PostAggregates::read(conn, inserted_post.id).unwrap();
PostView {
post: Post {
id: inserted_post.id,
name: inserted_post.name.clone(),
creator_id: inserted_person.id,
url: None,
body: None,
published: inserted_post.published,
updated: None,
community_id: inserted_community.id,
removed: false,
deleted: false,
locked: false,
stickied: false,
nsfw: false,
embed_title: None,
embed_description: None,
embed_video_url: None,
thumbnail_url: None,
ap_id: inserted_post.ap_id.to_owned(),
local: true,
language_id: LanguageId(47),
},
my_vote: None,
unread_comments: 0,
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creator: PersonSafe {
id: inserted_person.id,
name: inserted_person.name.clone(),
display_name: None,
published: inserted_person.published,
avatar: None,
actor_id: inserted_person.actor_id.to_owned(),
local: true,
admin: false,
bot_account: false,
banned: false,
deleted: false,
bio: None,
banner: None,
updated: None,
inbox_url: inserted_person.inbox_url.to_owned(),
shared_inbox_url: None,
matrix_user_id: None,
ban_expires: None,
},
creator_banned_from_community: false,
community: CommunitySafe {
id: inserted_community.id,
name: inserted_community.name.clone(),
icon: None,
removed: false,
deleted: false,
nsfw: false,
actor_id: inserted_community.actor_id.to_owned(),
local: true,
title: "nada".to_owned(),
description: None,
updated: None,
banner: None,
hidden: false,
posting_restricted_to_mods: false,
published: inserted_community.published,
},
counts: PostAggregates {
id: agg.id,
post_id: inserted_post.id,
comments: 0,
score: 0,
upvotes: 0,
downvotes: 0,
stickied: false,
published: agg.published,
newest_comment_time_necro: inserted_post.published,
newest_comment_time: inserted_post.published,
},
subscribed: SubscribedType::NotSubscribed,
read: false,
saved: false,
creator_blocked: false,
}
}
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}