Plume/plume-models/src/comments.rs

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use activitypub::{activity::{Create, Delete}, link, object::{Note, Tombstone}};
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use chrono::{self, NaiveDateTime};
use diesel::{self, ExpressionMethods, QueryDsl, RunQueryDsl};
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use serde_json;
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use std::collections::HashSet;
use instance::Instance;
use mentions::Mention;
use notifications::*;
use plume_common::activity_pub::{
inbox::{FromActivity, Notify, Deletable},
Id, IntoId, PUBLIC_VISIBILTY,
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};
use plume_common::utils;
use comment_seers::{CommentSeers, NewCommentSeers};
use posts::Post;
use safe_string::SafeString;
use schema::comments;
use users::User;
use Connection;
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#[derive(Queryable, Identifiable, Serialize, Clone)]
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pub struct Comment {
pub id: i32,
pub content: SafeString,
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pub in_response_to_id: Option<i32>,
pub post_id: i32,
pub author_id: i32,
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pub creation_date: NaiveDateTime,
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pub ap_url: Option<String>,
pub sensitive: bool,
pub spoiler_text: String,
pub public_visibility: bool,
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}
#[derive(Insertable, Default)]
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#[table_name = "comments"]
pub struct NewComment {
pub content: SafeString,
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pub in_response_to_id: Option<i32>,
pub post_id: i32,
pub author_id: i32,
pub ap_url: Option<String>,
pub sensitive: bool,
pub spoiler_text: String,
pub public_visibility: bool,
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}
impl Comment {
insert!(comments, NewComment);
get!(comments);
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list_by!(comments, list_by_post, post_id as i32);
find_by!(comments, find_by_ap_url, ap_url as &str);
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pub fn get_author(&self, conn: &Connection) -> User {
User::get(conn, self.author_id).expect("Comment::get_author: author error")
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}
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pub fn get_post(&self, conn: &Connection) -> Post {
Post::get(conn, self.post_id).expect("Comment::get_post: post error")
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}
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pub fn count_local(conn: &Connection) -> i64 {
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use schema::users;
let local_authors = users::table
.filter(users::instance_id.eq(Instance::local_id(conn)))
.select(users::id);
comments::table
.filter(comments::author_id.eq_any(local_authors))
.count()
.get_result(conn)
.expect("Comment::count_local: loading error")
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}
pub fn get_responses(&self, conn: &Connection) -> Vec<Comment> {
comments::table.filter(comments::in_response_to_id.eq(self.id))
.load::<Comment>(conn)
.expect("Comment::get_responses: loading error")
}
pub fn update_ap_url(&self, conn: &Connection) -> Comment {
if self.ap_url.is_none() {
diesel::update(self)
.set(comments::ap_url.eq(self.compute_id(conn)))
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.execute(conn)
.expect("Comment::update_ap_url: update error");
Comment::get(conn, self.id).expect("Comment::update_ap_url: get error")
} else {
self.clone()
}
}
pub fn compute_id(&self, conn: &Connection) -> String {
format!("{}comment/{}", self.get_post(conn).ap_url, self.id)
}
pub fn can_see(&self, conn: &Connection, user: Option<&User>) -> bool {
self.public_visibility ||
user.as_ref().map(|u| CommentSeers::can_see(conn, self, u)).unwrap_or(false)
}
pub fn to_activity(&self, conn: &Connection) -> Note {
let (html, mentions, _hashtags) = utils::md_to_html(self.content.get().as_ref(),
&Instance::get_local(conn)
.expect("Comment::to_activity: instance error")
.public_domain);
let author = User::get(conn, self.author_id).expect("Comment::to_activity: author error");
let mut note = Note::default();
let to = vec![Id::new(PUBLIC_VISIBILTY.to_string())];
note.object_props
.set_id_string(self.ap_url.clone().unwrap_or_default())
.expect("Comment::to_activity: id error");
note.object_props
.set_summary_string(self.spoiler_text.clone())
.expect("Comment::to_activity: summary error");
note.object_props
.set_content_string(html)
.expect("Comment::to_activity: content error");
note.object_props
.set_in_reply_to_link(Id::new(self.in_response_to_id.map_or_else(
|| {
Post::get(conn, self.post_id)
.expect("Comment::to_activity: post error")
.ap_url
},
|id| {
let comm =
Comment::get(conn, id).expect("Comment::to_activity: comment error");
comm.ap_url.clone().unwrap_or_else(|| comm.compute_id(conn))
},
)))
.expect("Comment::to_activity: in_reply_to error");
note.object_props
.set_published_string(chrono::Utc::now().to_rfc3339())
.expect("Comment::to_activity: published error");
note.object_props
.set_attributed_to_link(author.clone().into_id())
.expect("Comment::to_activity: attributed_to error");
note.object_props
.set_to_link_vec(to.clone())
.expect("Comment::to_activity: to error");
note.object_props
.set_tag_link_vec(
mentions
.into_iter()
.map(|m| Mention::build_activity(conn, &m))
.collect::<Vec<link::Mention>>(),
)
.expect("Comment::to_activity: tag error");
note
}
pub fn create_activity(&self, conn: &Connection) -> Create {
let author =
User::get(conn, self.author_id).expect("Comment::create_activity: author error");
let note = self.to_activity(conn);
let mut act = Create::default();
act.create_props
.set_actor_link(author.into_id())
.expect("Comment::create_activity: actor error");
act.create_props
.set_object_object(note.clone())
.expect("Comment::create_activity: object error");
act.object_props
.set_id_string(format!(
"{}/activity",
self.ap_url
.clone()
.expect("Comment::create_activity: ap_url error")
))
.expect("Comment::create_activity: id error");
act.object_props
.set_to_link_vec(
note.object_props
.to_link_vec::<Id>()
.expect("Comment::create_activity: id error"),
)
.expect("Comment::create_activity: to error");
act.object_props
.set_cc_link_vec::<Id>(vec![])
.expect("Comment::create_activity: cc error");
act
}
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}
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impl FromActivity<Note, Connection> for Comment {
fn from_activity(conn: &Connection, note: Note, actor: Id) -> Comment {
let comm = {
let previous_url = note
.object_props
.in_reply_to
.as_ref()
.expect("Comment::from_activity: not an answer error")
.as_str()
.expect("Comment::from_activity: in_reply_to parsing error");
let previous_comment = Comment::find_by_ap_url(conn, previous_url);
let is_public = |v: &Option<serde_json::Value>| match v.as_ref().unwrap_or(&serde_json::Value::Null) {
serde_json::Value::Array(v) => v.iter().filter_map(serde_json::Value::as_str).any(|s| s==PUBLIC_VISIBILTY),
serde_json::Value::String(s) => s == PUBLIC_VISIBILTY,
_ => false,
};
let public_visibility = is_public(&note.object_props.to) ||
is_public(&note.object_props.bto) ||
is_public(&note.object_props.cc) ||
is_public(&note.object_props.bcc);
let comm = Comment::insert(
conn,
NewComment {
content: SafeString::new(
&note
.object_props
.content_string()
.expect("Comment::from_activity: content deserialization error"),
),
spoiler_text: note
.object_props
.summary_string()
.unwrap_or_default(),
ap_url: note.object_props.id_string().ok(),
in_response_to_id: previous_comment.clone().map(|c| c.id),
post_id: previous_comment.map(|c| c.post_id).unwrap_or_else(|| {
Post::find_by_ap_url(conn, previous_url)
.expect("Comment::from_activity: post error")
.id
}),
author_id: User::from_url(conn, actor.as_ref())
.expect("Comment::from_activity: author error")
.id,
sensitive: false, // "sensitive" is not a standard property, we need to think about how to support it with the activitypub crate
public_visibility
},
);
// save mentions
if let Some(serde_json::Value::Array(tags)) = note.object_props.tag.clone() {
for tag in tags {
serde_json::from_value::<link::Mention>(tag)
.map(|m| {
let author = &Post::get(conn, comm.post_id)
.expect("Comment::from_activity: error")
.get_authors(conn)[0];
let not_author = m
.link_props
.href_string()
.expect("Comment::from_activity: no href error")
!= author.ap_url.clone();
Mention::from_activity(conn, &m, comm.id, false, not_author)
})
.ok();
}
}
comm
};
if !comm.public_visibility {
let receivers_ap_url = |v: Option<serde_json::Value>| {
let filter = |e: serde_json::Value| if let serde_json::Value::String(s) = e { Some(s) } else { None };
match v.unwrap_or(serde_json::Value::Null) {
serde_json::Value::Array(v) => v,
v => vec![v],
}.into_iter().filter_map(filter)
};
let mut note = note;
let to = receivers_ap_url(note.object_props.to.take());
let cc = receivers_ap_url(note.object_props.cc.take());
let bto = receivers_ap_url(note.object_props.bto.take());
let bcc = receivers_ap_url(note.object_props.bcc.take());
let receivers_ap_url = to.chain(cc).chain(bto).chain(bcc)
.collect::<HashSet<_>>()//remove duplicates (don't do a query more than once)
.into_iter()
.map(|v| if let Some(user) = User::from_url(conn,&v) {
vec![user]
} else {
vec![]// TODO try to fetch collection
})
.flatten()
.filter(|u| u.get_instance(conn).local)
.collect::<HashSet<User>>();//remove duplicates (prevent db error)
for user in &receivers_ap_url {
CommentSeers::insert(
conn,
NewCommentSeers {
comment_id: comm.id,
user_id: user.id
}
);
}
}
comm.notify(conn);
comm
}
}
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impl Notify<Connection> for Comment {
fn notify(&self, conn: &Connection) {
for author in self.get_post(conn).get_authors(conn) {
Notification::insert(
conn,
NewNotification {
kind: notification_kind::COMMENT.to_string(),
object_id: self.id,
user_id: author.id,
},
);
}
}
}
pub struct CommentTree {
pub comment: Comment,
pub responses: Vec<CommentTree>,
}
impl CommentTree {
pub fn from_post(conn: &Connection, p: &Post, user: Option<&User>) -> Vec<Self> {
Comment::list_by_post(conn, p.id).into_iter()
.filter(|c| c.in_response_to_id.is_none())
.filter(|c| c.can_see(conn, user))
.map(|c| Self::from_comment(conn, c, user))
.collect()
}
pub fn from_comment(conn: &Connection, comment: Comment, user: Option<&User>) -> Self {
let responses = comment.get_responses(conn).into_iter()
.filter(|c| c.can_see(conn, user))
.map(|c| Self::from_comment(conn, c, user))
.collect();
CommentTree {
comment,
responses,
}
}
}
impl<'a> Deletable<Connection, Delete> for Comment {
fn delete(&self, conn: &Connection) -> Delete {
let mut act = Delete::default();
act.delete_props
.set_actor_link(self.get_author(conn).into_id())
.expect("Comment::delete: actor error");
let mut tombstone = Tombstone::default();
tombstone
.object_props
.set_id_string(self.ap_url.clone().expect("Comment::delete: no ap_url"))
.expect("Comment::delete: object.id error");
act.delete_props
.set_object_object(tombstone)
.expect("Comment::delete: object error");
act.object_props
.set_id_string(format!("{}#delete", self.ap_url.clone().unwrap()))
.expect("Comment::delete: id error");
act.object_props
.set_to_link_vec(vec![Id::new(PUBLIC_VISIBILTY)])
.expect("Comment::delete: to error");
for m in Mention::list_for_comment(&conn, self.id) {
m.delete(conn);
}
diesel::update(comments::table).filter(comments::in_response_to_id.eq(self.id))
.set(comments::in_response_to_id.eq(self.in_response_to_id))
.execute(conn)
.expect("Comment::delete: DB error could not update other comments");
diesel::delete(self)
.execute(conn)
.expect("Comment::delete: DB error");
act
}
fn delete_id(id: &str, actor_id: &str, conn: &Connection) {
let actor = User::find_by_ap_url(conn, actor_id);
let comment = Comment::find_by_ap_url(conn, id);
if let Some(comment) = comment.filter(|c| c.author_id == actor.unwrap().id) {
comment.delete(conn);
}
}
}