Plume/src/models/posts.rs

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use chrono::NaiveDateTime;
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use diesel::{self, PgConnection, RunQueryDsl, QueryDsl, ExpressionMethods, BelongingToDsl};
use diesel::dsl::any;
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use serde_json;
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use BASE_URL;
use activity_pub::{PUBLIC_VISIBILTY, ap_url};
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use activity_pub::actor::Actor;
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use activity_pub::object::Object;
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use models::blogs::Blog;
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use models::likes::Like;
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use models::users::User;
use models::post_authors::PostAuthor;
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use schema::posts;
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#[derive(Queryable, Identifiable, Serialize)]
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pub struct Post {
pub id: i32,
pub blog_id: i32,
pub slug: String,
pub title: String,
pub content: String,
pub published: bool,
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pub license: String,
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pub creation_date: NaiveDateTime,
pub ap_url: String
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}
#[derive(Insertable)]
#[table_name = "posts"]
pub struct NewPost {
pub blog_id: i32,
pub slug: String,
pub title: String,
pub content: String,
pub published: bool,
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pub license: String,
pub ap_url: String
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}
impl Post {
pub fn insert(conn: &PgConnection, new: NewPost) -> Post {
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diesel::insert_into(posts::table)
.values(new)
.get_result(conn)
.expect("Error saving new post")
}
pub fn get(conn: &PgConnection, id: i32) -> Option<Post> {
posts::table.filter(posts::id.eq(id))
.limit(1)
.load::<Post>(conn)
.expect("Error loading post by id")
.into_iter().nth(0)
}
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pub fn find_by_slug(conn: &PgConnection, slug: String) -> Option<Post> {
posts::table.filter(posts::slug.eq(slug))
.limit(1)
.load::<Post>(conn)
.expect("Error loading post by slug")
.into_iter().nth(0)
}
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pub fn find_by_ap_url(conn: &PgConnection, ap_url: String) -> Option<Post> {
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posts::table.filter(posts::ap_url.eq(ap_url))
.limit(1)
.load::<Post>(conn)
.expect("Error loading post by AP URL")
.into_iter().nth(0)
}
pub fn get_recents(conn: &PgConnection, limit: i64) -> Vec<Post> {
posts::table.order(posts::creation_date.desc())
.limit(limit)
.load::<Post>(conn)
.expect("Error loading recent posts")
}
pub fn get_recents_for_author(conn: &PgConnection, author: &User, limit: i64) -> Vec<Post> {
use schema::post_authors;
let posts = PostAuthor::belonging_to(author).select(post_authors::post_id);
posts::table.filter(posts::id.eq(any(posts)))
.order(posts::creation_date.desc())
.limit(limit)
.load::<Post>(conn)
.expect("Error loading recent posts for author")
}
pub fn get_recents_for_blog(conn: &PgConnection, blog: &Blog, limit: i64) -> Vec<Post> {
posts::table.filter(posts::blog_id.eq(blog.id))
.order(posts::creation_date.desc())
.limit(limit)
.load::<Post>(conn)
.expect("Error loading recent posts for blog")
}
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pub fn get_authors(&self, conn: &PgConnection) -> Vec<User> {
use schema::users;
use schema::post_authors;
let author_list = PostAuthor::belonging_to(self).select(post_authors::author_id);
users::table.filter(users::id.eq(any(author_list))).load::<User>(conn).unwrap()
}
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pub fn get_blog(&self, conn: &PgConnection) -> Blog {
use schema::blogs;
blogs::table.filter(blogs::id.eq(self.blog_id))
.limit(1)
.load::<Blog>(conn)
.expect("Couldn't load blog associted to post")
.into_iter().nth(0).unwrap()
}
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pub fn get_likes(&self, conn: &PgConnection) -> Vec<Like> {
use schema::likes;
likes::table.filter(likes::post_id.eq(self.id))
.load::<Like>(conn)
.expect("Couldn't load likes associted to post")
}
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pub fn update_ap_url(&self, conn: &PgConnection) {
if self.ap_url.len() == 0 {
diesel::update(self)
.set(posts::ap_url.eq(self.compute_id(conn)))
.get_result::<Post>(conn).expect("Couldn't update AP URL");
}
}
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pub fn get_receivers_urls(&self, conn: &PgConnection) -> Vec<String> {
let followers = self.get_authors(conn).into_iter().map(|a| a.get_followers(conn)).collect::<Vec<Vec<User>>>();
let to = followers.into_iter().fold(vec![], |mut acc, f| {
for x in f {
acc.push(x.ap_url);
}
acc
});
to
}
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}
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impl Object for Post {
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fn compute_id(&self, conn: &PgConnection) -> String {
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ap_url(format!("{}/~/{}/{}", BASE_URL.as_str(), self.get_blog(conn).actor_id, self.slug))
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}
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fn serialize(&self, conn: &PgConnection) -> serde_json::Value {
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let mut to = self.get_receivers_urls(conn);
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to.push(PUBLIC_VISIBILTY.to_string());
json!({
"type": "Article",
"id": self.compute_id(conn),
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"attributedTo": self.get_authors(conn)[0].compute_id(conn),
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"name": self.title,
"content": self.content,
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"actor": self.get_authors(conn)[0].compute_id(conn),
"published": self.creation_date,
// TODO: "image": "image",
// TODO: "preview": "preview",
// TODO: "replies": "replies",
// TODO: "summary": "summary",
"tag": [],
// TODO: "updated": "updated",
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"url": self.compute_id(conn),
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"to": to,
"cc": []
})
}
}