Allow remote posts without content

src/activitypub/handlers/create_note.rs

@@ -1,6 +1,7 @@
 use std::collections::HashMap;
 use std::path::Path;
 
+use chrono::Utc;
 use serde_json::{Value as JsonValue};
 use tokio_postgres::GenericClient;
 use uuid::Uuid;
@@ -64,10 +65,10 @@ fn parse_object_url(value: &JsonValue) -> Result<String, ConversionError> {
 }
 
 pub fn get_note_content(object: &Object) -> Result<String, ValidationError> {
-    let mut content = object.content.as_ref()
+    let mut content = object.content.as_deref()
         // Lemmy pages and PeerTube videos have "name" property
-        .or(object.name.as_ref())
-        .ok_or(ValidationError("no content"))?
+        .or(object.name.as_deref())
+        .unwrap_or("")
         .to_owned();
     if object.object_type != NOTE {
         if let Some(ref value) = object.url {
@@ -159,6 +160,7 @@ pub async fn handle_note(
         err
     })?;
     let content = get_note_content(&object)?;
+    let created_at = object.published.unwrap_or(Utc::now());
 
     let mut attachments: Vec<Uuid> = Vec::new();
     if let Some(value) = object.attachment {
@@ -203,6 +205,10 @@ pub async fn handle_note(
             attachments.push(db_attachment.id);
         };
     };
+    if content.is_empty() && attachments.is_empty() {
+        return Err(ValidationError("post is empty").into());
+    };
+
     let mut mentions: Vec<Uuid> = Vec::new();
     let mut tags = vec![];
     let mut links = vec![];
@@ -361,7 +367,7 @@ pub async fn handle_note(
         tags: tags,
         links: links,
         object_id: Some(object.id),
-        created_at: object.published,
+        created_at,
     };
     let post = create_post(db_client, &author.id, post_data).await?;
     Ok(post)

src/mastodon_api/statuses/types.rs

@@ -171,7 +171,7 @@ impl TryFrom<StatusData> for PostCreateData {
             tags: vec![],
             links: vec![],
             object_id: None,
-            created_at: None,
+            created_at: Utc::now(),
         };
         Ok(post_data)
     }

src/models/posts/queries.rs

@@ -38,7 +38,6 @@ pub async fn create_post(
 ) -> Result<Post, DatabaseError> {
     let transaction = db_client.transaction().await?;
     let post_id = new_uuid();
-    let created_at = data.created_at.unwrap_or(Utc::now());
     // Replying to reposts is not allowed
     // Reposting of other reposts or non-public posts is not allowed
     let insert_statement = format!(
@@ -78,7 +77,7 @@ pub async fn create_post(
             &data.repost_of_id,
             &data.visibility,
             &data.object_id,
-            &created_at,
+            &data.created_at,
         ],
     ).await.map_err(catch_unique_violation("post"))?;
     let post_row = maybe_post_row.ok_or(DatabaseError::NotFound("post"))?;

src/models/posts/types.rs

@@ -244,12 +244,13 @@ pub struct PostCreateData {
     pub tags: Vec<String>,
     pub links: Vec<Uuid>,
     pub object_id: Option<String>,
-    pub created_at: Option<DateTime<Utc>>,
+    pub created_at: DateTime<Utc>,
 }
 
 impl PostCreateData {
-    /// Validate and clean post data.
+    /// Validate and clean post data (only for local posts).
     pub fn clean(&mut self, character_limit: usize) -> Result<(), ValidationError> {
+        assert!(self.object_id.is_none());
         if self.content.chars().count() > character_limit {
             return Err(ValidationError("post is too long"));
         };
@@ -275,35 +276,19 @@ mod tests {
     const POST_CHARACTER_LIMIT: usize = 1000;
 
     #[test]
-    fn test_validate_post_data() {
+    fn test_post_data_empty() {
         let mut post_data_1 = PostCreateData {
             content: "  ".to_string(),
-            in_reply_to_id: None,
-            repost_of_id: None,
-            visibility: Visibility::Public,
-            attachments: vec![],
-            mentions: vec![],
-            tags: vec![],
-            links: vec![],
-            object_id: None,
-            created_at: None,
+            ..Default::default()
         };
         assert_eq!(post_data_1.clean(POST_CHARACTER_LIMIT).is_ok(), false);
     }
 
     #[test]
-    fn test_trimming() {
+    fn test_post_data_trimming() {
         let mut post_data_2 = PostCreateData {
             content: "test ".to_string(),
-            in_reply_to_id: None,
-            repost_of_id: None,
-            visibility: Visibility::Public,
-            attachments: vec![],
-            mentions: vec![],
-            tags: vec![],
-            links: vec![],
-            object_id: None,
-            created_at: None,
+            ..Default::default()
         };
         assert_eq!(post_data_2.clean(POST_CHARACTER_LIMIT).is_ok(), true);
         assert_eq!(post_data_2.content.as_str(), "test");