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, SaveChangesDsl};
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use serde_json;
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use std::collections::HashSet;
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use comment_seers::{CommentSeers, NewCommentSeers};
use instance::Instance;
use medias::Media;
use mentions::Mention;
use notifications::*;
use plume_common::activity_pub::{
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inbox::{Deletable, FromActivity, Notify},
Id, IntoId, PUBLIC_VISIBILTY,
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};
use plume_common::utils;
use posts::Post;
use safe_string::SafeString;
use schema::comments;
use users::User;
use {Connection, Error, Result};
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#[derive(Queryable, Identifiable, Clone, AsChangeset)]
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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, |inserted, conn| {
if inserted.ap_url.is_none() {
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inserted.ap_url = Some(format!(
"{}comment/{}",
inserted.get_post(conn)?.ap_url,
inserted.id
));
let _: Comment = inserted.save_changes(conn)?;
}
Ok(inserted)
});
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) -> Result<User> {
User::get(conn, self.author_id)
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}
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pub fn get_post(&self, conn: &Connection) -> Result<Post> {
Post::get(conn, self.post_id)
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}
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pub fn count_local(conn: &Connection) -> Result<i64> {
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use schema::users;
let local_authors = users::table
.filter(users::instance_id.eq(Instance::get_local(conn)?.id))
.select(users::id);
comments::table
.filter(comments::author_id.eq_any(local_authors))
.count()
.get_result(conn)
.map_err(Error::from)
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}
pub fn get_responses(&self, conn: &Connection) -> Result<Vec<Comment>> {
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comments::table
.filter(comments::in_response_to_id.eq(self.id))
.load::<Comment>(conn)
.map_err(Error::from)
}
pub fn can_see(&self, conn: &Connection, user: Option<&User>) -> bool {
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self.public_visibility
|| user
.as_ref()
.map(|u| CommentSeers::can_see(conn, self, u).unwrap_or(false))
.unwrap_or(false)
}
pub fn to_activity<'b>(&self, conn: &'b Connection) -> Result<Note> {
let author = User::get(conn, self.author_id)?;
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let (html, mentions, _hashtags) = utils::md_to_html(
self.content.get().as_ref(),
&Instance::get_local(conn)?.public_domain,
true,
Some(Media::get_media_processor(conn, vec![&author])),
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);
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())?;
note.object_props
.set_summary_string(self.spoiler_text.clone())?;
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note.object_props.set_content_string(html)?;
note.object_props
.set_in_reply_to_link(Id::new(self.in_response_to_id.map_or_else(
|| Ok(Post::get(conn, self.post_id)?.ap_url),
|id| Ok(Comment::get(conn, id)?.ap_url.unwrap_or_default()) as Result<String>,
)?))?;
note.object_props
.set_published_string(chrono::Utc::now().to_rfc3339())?;
note.object_props
.set_attributed_to_link(author.clone().into_id())?;
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note.object_props.set_to_link_vec(to.clone())?;
note.object_props.set_tag_link_vec(
mentions
.into_iter()
.filter_map(|m| Mention::build_activity(conn, &m).ok())
.collect::<Vec<link::Mention>>(),
)?;
Ok(note)
}
pub fn create_activity(&self, conn: &Connection) -> Result<Create> {
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let author = User::get(conn, self.author_id)?;
let note = self.to_activity(conn)?;
let mut act = Create::default();
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act.create_props.set_actor_link(author.into_id())?;
act.create_props.set_object_object(note.clone())?;
act.object_props
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.set_id_string(format!("{}/activity", self.ap_url.clone()?,))?;
act.object_props
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.set_to_link_vec(note.object_props.to_link_vec::<Id>()?)?;
act.object_props.set_cc_link_vec::<Id>(vec![])?;
Ok(act)
}
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}
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impl FromActivity<Note, Connection> for Comment {
type Error = Error;
fn from_activity(conn: &Connection, note: Note, actor: Id) -> Result<Comment> {
let comm = {
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let previous_url = note.object_props.in_reply_to.as_ref()?.as_str()?;
let previous_comment = Comment::find_by_ap_url(conn, previous_url);
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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,
};
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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 {
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content: SafeString::new(&note.object_props.content_string()?),
spoiler_text: note.object_props.summary_string().unwrap_or_default(),
ap_url: note.object_props.id_string().ok(),
in_response_to_id: previous_comment.iter().map(|c| c.id).next(),
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post_id: previous_comment.map(|c| c.post_id).or_else(|_| {
Ok(Post::find_by_ap_url(conn, previous_url)?.id) as Result<i32>
})?,
author_id: User::from_url(conn, actor.as_ref())?.id,
sensitive: false, // "sensitive" is not a standard property, we need to think about how to support it with the activitypub crate
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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_err(Error::from)
.and_then(|m| {
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let author = &Post::get(conn, comm.post_id)?.get_authors(conn)?[0];
let not_author = m.link_props.href_string()? != author.ap_url.clone();
Ok(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>| {
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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],
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}
.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());
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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()
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.map(|v| {
if let Ok(user) = User::from_url(conn, &v) {
vec![user]
} else {
vec![] // TODO try to fetch collection
}
})
.flatten()
.filter(|u| u.get_instance(conn).map(|i| i.local).unwrap_or(false))
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.collect::<HashSet<User>>(); //remove duplicates (prevent db error)
for user in &receivers_ap_url {
CommentSeers::insert(
conn,
NewCommentSeers {
comment_id: comm.id,
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user_id: user.id,
},
)?;
}
}
comm.notify(conn)?;
Ok(comm)
}
}
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impl Notify<Connection> for Comment {
type Error = Error;
fn notify(&self, conn: &Connection) -> Result<()> {
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,
},
)?;
}
Ok(())
}
}
pub struct CommentTree {
pub comment: Comment,
pub responses: Vec<CommentTree>,
}
impl CommentTree {
pub fn from_post(conn: &Connection, p: &Post, user: Option<&User>) -> Result<Vec<Self>> {
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Ok(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))
.filter_map(|c| Self::from_comment(conn, c, user).ok())
.collect())
}
pub fn from_comment(conn: &Connection, comment: Comment, user: Option<&User>) -> Result<Self> {
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let responses = comment
.get_responses(conn)?
.into_iter()
.filter(|c| c.can_see(conn, user))
.filter_map(|c| Self::from_comment(conn, c, user).ok())
.collect();
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Ok(CommentTree { comment, responses })
}
}
impl<'a> Deletable<Connection, Delete> for Comment {
type Error = Error;
fn delete(&self, conn: &Connection) -> Result<Delete> {
let mut act = Delete::default();
act.delete_props
.set_actor_link(self.get_author(conn)?.into_id())?;
let mut tombstone = Tombstone::default();
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tombstone.object_props.set_id_string(self.ap_url.clone()?)?;
act.delete_props.set_object_object(tombstone)?;
act.object_props
.set_id_string(format!("{}#delete", self.ap_url.clone().unwrap()))?;
act.object_props
.set_to_link_vec(vec![Id::new(PUBLIC_VISIBILTY)])?;
for m in Mention::list_for_comment(conn, self.id)? {
for n in Notification::find_for_mention(conn, &m)? {
n.delete(conn)?;
}
m.delete(conn)?;
}
for n in Notification::find_for_comment(conn, &self)? {
n.delete(conn)?;
}
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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)?;
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diesel::delete(self).execute(conn)?;
Ok(act)
}
fn delete_id(id: &str, actor_id: &str, conn: &Connection) -> Result<Delete> {
let actor = User::find_by_ap_url(conn, actor_id)?;
let comment = Comment::find_by_ap_url(conn, id)?;
if comment.author_id == actor.id {
comment.delete(conn)
} else {
Err(Error::Unauthorized)
}
}
}