Plume/src/models/posts.rs

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use activitypub::{
activity::Create,
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link,
object::Article
};
use chrono::{NaiveDateTime, TimeZone, Utc};
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use diesel::{self, PgConnection, RunQueryDsl, QueryDsl, ExpressionMethods, BelongingToDsl, dsl::any};
use heck::KebabCase;
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use serde_json;
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use BASE_URL;
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use activity_pub::{
PUBLIC_VISIBILTY, ap_url, Id, IntoId,
inbox::FromActivity
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};
use models::{
blogs::Blog,
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instance::Instance,
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likes::Like,
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mentions::Mention,
post_authors::*,
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reshares::Reshare,
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users::User
};
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use schema::posts;
use safe_string::SafeString;
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#[derive(Queryable, Identifiable, Serialize, Clone)]
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pub struct Post {
pub id: i32,
pub blog_id: i32,
pub slug: String,
pub title: String,
pub content: SafeString,
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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: SafeString,
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pub published: bool,
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pub license: String,
pub ap_url: String
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}
impl Post {
insert!(posts, NewPost);
get!(posts);
find_by!(posts, find_by_slug, slug as String, blog_id as i32);
find_by!(posts, find_by_ap_url, ap_url as String);
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pub fn count_local(conn: &PgConnection) -> usize {
use schema::post_authors;
use schema::users;
let local_authors = users::table.filter(users::instance_id.eq(Instance::local_id(conn))).select(users::id);
let local_posts_id = post_authors::table.filter(post_authors::author_id.eq(any(local_authors))).select(post_authors::post_id);
posts::table.filter(posts::id.eq(any(local_posts_id)))
.load::<Post>(conn)
.expect("Couldn't load local posts")
.len()
}
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 get_reshares(&self, conn: &PgConnection) -> Vec<Reshare> {
use schema::reshares;
reshares::table.filter(reshares::post_id.eq(self.id))
.load::<Reshare>(conn)
.expect("Couldn't load reshares associted to post")
}
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pub fn update_ap_url(&self, conn: &PgConnection) -> Post {
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if self.ap_url.len() == 0 {
diesel::update(self)
.set(posts::ap_url.eq(self.compute_id(conn)))
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.get_result::<Post>(conn).expect("Couldn't update AP URL")
} else {
self.clone()
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}
}
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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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pub fn into_activity(&self, conn: &PgConnection) -> Article {
let mut to = self.get_receivers_urls(conn);
to.push(PUBLIC_VISIBILTY.to_string());
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let mentions = Mention::list_for_post(conn, self.id).into_iter().map(|m| m.to_activity(conn)).collect::<Vec<link::Mention>>();
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let mut article = Article::default();
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article.object_props.set_name_string(self.title.clone()).expect("Article::into_activity: name error");
article.object_props.set_id_string(self.ap_url.clone()).expect("Article::into_activity: id error");
article.object_props.set_attributed_to_link_vec::<Id>(self.get_authors(conn).into_iter().map(|x| Id::new(x.ap_url)).collect()).expect("Article::into_activity: attributedTo error");
article.object_props.set_content_string(self.content.get().clone()).expect("Article::into_activity: content error");
article.object_props.set_published_utctime(Utc.from_utc_datetime(&self.creation_date)).expect("Article::into_activity: published error");
article.object_props.set_tag_link_vec(mentions).expect("Article::into_activity: tag error");
article.object_props.set_url_string(self.ap_url.clone()).expect("Article::into_activity: url error");
article.object_props.set_to_link_vec::<Id>(to.into_iter().map(Id::new).collect()).expect("Article::into_activity: to error");
article.object_props.set_cc_link_vec::<Id>(vec![]).expect("Article::into_activity: cc error");
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article
}
pub fn create_activity(&self, conn: &PgConnection) -> Create {
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let article = self.into_activity(conn);
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let mut act = Create::default();
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act.object_props.set_id_string(format!("{}/activity", self.ap_url)).expect("Article::create_activity: id error");
act.object_props.set_to_link_vec::<Id>(article.object_props.to_link_vec().expect("Article::create_activity: Couldn't copy 'to'"))
.expect("Article::create_activity: to error");
act.object_props.set_cc_link_vec::<Id>(article.object_props.cc_link_vec().expect("Article::create_activity: Couldn't copy 'cc'"))
.expect("Article::create_activity: cc error");
act.create_props.set_actor_link(Id::new(self.get_authors(conn)[0].clone().ap_url)).expect("Article::create_activity: actor error");
act.create_props.set_object_object(article).expect("Article::create_activity: object error");
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act
}
pub fn to_json(&self, conn: &PgConnection) -> serde_json::Value {
json!({
"post": self,
"author": self.get_authors(conn)[0].to_json(conn),
"url": format!("/~/{}/{}/", self.get_blog(conn).actor_id, self.slug),
"date": self.creation_date.timestamp()
})
}
pub fn compute_id(&self, conn: &PgConnection) -> String {
ap_url(format!("{}/~/{}/{}/", BASE_URL.as_str(), self.get_blog(conn).actor_id, self.slug))
}
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}
impl FromActivity<Article> for Post {
fn from_activity(conn: &PgConnection, article: Article, _actor: Id) -> Post {
let (blog, authors) = article.object_props.attributed_to_link_vec::<Id>()
.expect("Post::from_activity: attributedTo error")
.into_iter()
.fold((None, vec![]), |(blog, mut authors), link| {
let url: String = link.into();
match User::from_url(conn, url.clone()) {
Some(user) => {
authors.push(user);
(blog, authors)
},
None => (blog.or_else(|| Blog::from_url(conn, url)), authors)
}
});
let title = article.object_props.name_string().expect("Post::from_activity: title error");
let post = Post::insert(conn, NewPost {
blog_id: blog.expect("Received a new Article without a blog").id,
slug: title.to_kebab_case(),
title: title,
content: SafeString::new(&article.object_props.content_string().expect("Post::from_activity: content error")),
published: true,
license: String::from("CC-0"), // TODO
// FIXME: This is wrong: with this logic, we may use the display URL as the AP ID. We need two different fields
ap_url: article.object_props.url_string().unwrap_or(article.object_props.id_string().expect("Post::from_activity: url + id error"))
});
for author in authors.into_iter() {
PostAuthor::insert(conn, NewPostAuthor {
post_id: post.id,
author_id: author.id
});
}
// save mentions
if let Some(serde_json::Value::Array(tags)) = article.object_props.tag.clone() {
for tag in tags.into_iter() {
serde_json::from_value::<link::Mention>(tag)
.map(|m| Mention::from_activity(conn, m, post.id, true))
.ok();
}
}
post
}
}
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impl IntoId for Post {
fn into_id(self) -> Id {
Id::new(self.ap_url.clone())
}
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}