lemmy/server/src/actions/comment.rs

310 lines
8.7 KiB
Rust
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extern crate diesel;
use schema::{comment, comment_like};
use diesel::*;
use diesel::result::Error;
use serde::{Deserialize, Serialize};
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use {Crud, Likeable};
use actions::post::Post;
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// WITH RECURSIVE MyTree AS (
// SELECT * FROM comment WHERE parent_id IS NULL
// UNION ALL
// SELECT m.* FROM comment AS m JOIN MyTree AS t ON m.parent_id = t.id
// )
// SELECT * FROM MyTree;
#[derive(Queryable, Associations, Identifiable, PartialEq, Debug, Serialize, Deserialize)]
#[belongs_to(Post)]
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#[table_name="comment"]
pub struct Comment {
pub id: i32,
pub content: String,
pub attributed_to: String,
pub post_id: i32,
pub parent_id: Option<i32>,
pub published: chrono::NaiveDateTime,
pub updated: Option<chrono::NaiveDateTime>
}
#[derive(Insertable, AsChangeset, Clone)]
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#[table_name="comment"]
pub struct CommentForm {
pub content: String,
pub attributed_to: String,
pub post_id: i32,
pub parent_id: Option<i32>,
pub updated: Option<chrono::NaiveDateTime>
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}
#[derive(Identifiable, Queryable, Associations, PartialEq, Debug, Clone)]
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#[belongs_to(Comment)]
#[table_name = "comment_like"]
pub struct CommentLike {
pub id: i32,
pub comment_id: i32,
pub post_id: i32,
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pub fedi_user_id: String,
pub score: i16,
pub published: chrono::NaiveDateTime,
}
#[derive(Insertable, AsChangeset, Clone)]
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#[table_name="comment_like"]
pub struct CommentLikeForm {
pub comment_id: i32,
pub post_id: i32,
pub fedi_user_id: String,
pub score: i16
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}
impl Crud<CommentForm> for Comment {
fn read(conn: &PgConnection, comment_id: i32) -> Result<Self, Error> {
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use schema::comment::dsl::*;
comment.find(comment_id)
.first::<Self>(conn)
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}
fn delete(conn: &PgConnection, comment_id: i32) -> Result<usize, Error> {
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use schema::comment::dsl::*;
diesel::delete(comment.find(comment_id))
.execute(conn)
}
fn create(conn: &PgConnection, comment_form: &CommentForm) -> Result<Self, Error> {
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use schema::comment::dsl::*;
insert_into(comment)
.values(comment_form)
.get_result::<Self>(conn)
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}
fn update(conn: &PgConnection, comment_id: i32, comment_form: &CommentForm) -> Result<Self, Error> {
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use schema::comment::dsl::*;
diesel::update(comment.find(comment_id))
.set(comment_form)
.get_result::<Self>(conn)
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}
}
impl Likeable <CommentLikeForm> for CommentLike {
fn read(conn: &PgConnection, comment_id_from: i32) -> Result<Vec<Self>, Error> {
use schema::comment_like::dsl::*;
comment_like
.filter(comment_id.eq(comment_id_from))
.load::<Self>(conn)
}
fn like(conn: &PgConnection, comment_like_form: &CommentLikeForm) -> Result<Self, Error> {
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use schema::comment_like::dsl::*;
insert_into(comment_like)
.values(comment_like_form)
.get_result::<Self>(conn)
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}
fn remove(conn: &PgConnection, comment_like_form: &CommentLikeForm) -> Result<usize, Error> {
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use schema::comment_like::dsl::*;
diesel::delete(comment_like
.filter(comment_id.eq(comment_like_form.comment_id))
.filter(fedi_user_id.eq(&comment_like_form.fedi_user_id)))
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.execute(conn)
}
}
impl CommentLike {
pub fn from_post(conn: &PgConnection, post_id_from: i32) -> Result<Vec<Self>, Error> {
use schema::comment_like::dsl::*;
comment_like
.filter(post_id.eq(post_id_from))
.load::<Self>(conn)
}
}
impl Comment {
fn from_post(conn: &PgConnection, post_id_from: i32) -> Result<Vec<Self>, Error> {
use schema::comment::dsl::*;
comment
.filter(post_id.eq(post_id_from))
.order_by(published.desc())
.load::<Self>(conn)
}
}
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct CommentView {
pub id: i32,
pub content: String,
pub attributed_to: String,
pub post_id: i32,
pub parent_id: Option<i32>,
pub published: chrono::NaiveDateTime,
pub updated: Option<chrono::NaiveDateTime>,
pub score: i32,
pub upvotes: i32,
pub downvotes: i32,
pub my_vote: Option<i16>
}
impl CommentView {
fn from_comment(comment: &Comment, likes: &Vec<CommentLike>, fedi_user_id: &Option<String>) -> Self {
let mut upvotes: i32 = 0;
let mut downvotes: i32 = 0;
let mut my_vote: Option<i16> = Some(0);
for like in likes.iter() {
if like.score == 1 {
upvotes += 1
} else if like.score == -1 {
downvotes += 1;
}
if let Some(user) = fedi_user_id {
if like.fedi_user_id == *user {
my_vote = Some(like.score);
}
}
}
let score: i32 = upvotes - downvotes;
CommentView {
id: comment.id,
content: comment.content.to_owned(),
parent_id: comment.parent_id,
post_id: comment.post_id,
attributed_to: comment.attributed_to.to_owned(),
published: comment.published,
updated: None,
upvotes: upvotes,
score: score,
downvotes: downvotes,
my_vote: my_vote
}
}
pub fn from_new_comment(comment: &Comment) -> Self {
Self::from_comment(comment, &Vec::new(), &None)
}
pub fn read(conn: &PgConnection, comment_id: i32, fedi_user_id: &Option<String>) -> Self {
let comment = Comment::read(&conn, comment_id).unwrap();
let likes = CommentLike::read(&conn, comment_id).unwrap();
Self::from_comment(&comment, &likes, fedi_user_id)
}
pub fn from_post(conn: &PgConnection, post_id: i32, fedi_user_id: &Option<String>) -> Vec<Self> {
let comments = Comment::from_post(&conn, post_id).unwrap();
let post_comment_likes = CommentLike::from_post(&conn, post_id).unwrap();
let mut views = Vec::new();
for comment in comments.iter() {
let comment_likes: Vec<CommentLike> = post_comment_likes
.iter()
.filter(|like| comment.id == like.comment_id)
.cloned()
.collect();
let comment_view = CommentView::from_comment(&comment, &comment_likes, fedi_user_id);
views.push(comment_view);
};
views
}
}
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#[cfg(test)]
mod tests {
use establish_connection;
use super::*;
use actions::post::*;
use actions::community::*;
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use Crud;
#[test]
fn test_crud() {
let conn = establish_connection();
let new_community = CommunityForm {
name: "test community".to_string(),
updated: None
};
let inserted_community = Community::create(&conn, &new_community).unwrap();
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let new_post = PostForm {
name: "A test post".into(),
url: None,
body: None,
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attributed_to: "test_user.com".into(),
community_id: inserted_community.id,
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updated: None
};
let inserted_post = Post::create(&conn, &new_post).unwrap();
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let comment_form = CommentForm {
content: "A test comment".into(),
attributed_to: "test_user.com".into(),
post_id: inserted_post.id,
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parent_id: None,
updated: None
};
let inserted_comment = Comment::create(&conn, &comment_form).unwrap();
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let expected_comment = Comment {
id: inserted_comment.id,
content: "A test comment".into(),
attributed_to: "test_user.com".into(),
post_id: inserted_post.id,
parent_id: None,
published: inserted_comment.published,
updated: None
};
let child_comment_form = CommentForm {
content: "A child comment".into(),
attributed_to: "test_user.com".into(),
post_id: inserted_post.id,
parent_id: Some(inserted_comment.id),
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updated: None
};
let inserted_child_comment = Comment::create(&conn, &child_comment_form).unwrap();
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let comment_like_form = CommentLikeForm {
comment_id: inserted_comment.id,
post_id: inserted_post.id,
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fedi_user_id: "test".into(),
score: 1
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};
let inserted_comment_like = CommentLike::like(&conn, &comment_like_form).unwrap();
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let expected_comment_like = CommentLike {
id: inserted_comment_like.id,
comment_id: inserted_comment.id,
post_id: inserted_post.id,
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fedi_user_id: "test".into(),
published: inserted_comment_like.published,
score: 1
};
let read_comment = Comment::read(&conn, inserted_comment.id).unwrap();
let updated_comment = Comment::update(&conn, inserted_comment.id, &comment_form).unwrap();
let like_removed = CommentLike::remove(&conn, &comment_like_form).unwrap();
let num_deleted = Comment::delete(&conn, inserted_comment.id).unwrap();
Comment::delete(&conn, inserted_child_comment.id).unwrap();
Post::delete(&conn, inserted_post.id).unwrap();
Community::delete(&conn, inserted_community.id).unwrap();
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assert_eq!(expected_comment, read_comment);
assert_eq!(expected_comment, inserted_comment);
assert_eq!(expected_comment, updated_comment);
assert_eq!(expected_comment_like, inserted_comment_like);
assert_eq!(expected_comment.id, inserted_child_comment.parent_id.unwrap());
assert_eq!(1, like_removed);
assert_eq!(1, num_deleted);
}
}