add setting store_vote_timestamps

config/defaults.hjson

@@ -35,6 +35,9 @@
     database: "string"
     # Maximum number of active sql connections
     pool_size: 30
+    # Set true to store the time when votes were cast. Requires more storage space but can be
+    # used to detect vote manipulation.
+    store_vote_timestamps: false
   }
   # Pictrs image server configuration.
   pictrs: {

crates/api/src/comment/like.rs

@@ -9,11 +9,7 @@ use lemmy_api_common::{
 };
 use lemmy_db_schema::{
   newtypes::LocalUserId,
-  source::{
-    comment::{CommentLike, CommentLikeForm},
-    comment_reply::CommentReply,
-    local_site::LocalSite,
-  },
+  source::{comment::CommentLike, comment_reply::CommentReply, local_site::LocalSite},
   traits::Likeable,
 };
 use lemmy_db_views::structs::{CommentView, LocalUserView};
@@ -65,23 +61,23 @@ pub async fn like_comment(
     }
   }
 
-  let like_form = CommentLikeForm {
-    comment_id: data.comment_id,
-    person_id: local_user_view.person.id,
-    score: data.score,
-  };
-
   // Remove any likes first
   let person_id = local_user_view.person.id;
 
   CommentLike::remove(&mut context.pool(), person_id, comment_id).await?;
 
   // Only add the like if the score isnt 0
-  let do_add = like_form.score != 0 && (like_form.score == 1 || like_form.score == -1);
+  let do_add = data.score != 0 && (data.score == 1 || data.score == -1);
   if do_add {
-    CommentLike::like(&mut context.pool(), &like_form)
-      .await
-      .with_lemmy_type(LemmyErrorType::CouldntLikeComment)?;
+    CommentLike::like(
+      &mut context.pool(),
+      person_id,
+      data.comment_id,
+      data.score,
+      context.settings(),
+    )
+    .await
+    .with_lemmy_type(LemmyErrorType::CouldntLikeComment)?;
   }
 
   ActivityChannel::submit_activity(

crates/api/src/post/like.rs

@@ -17,7 +17,7 @@ use lemmy_db_schema::{
   source::{
     community::Community,
     local_site::LocalSite,
-    post::{Post, PostLike, PostLikeForm},
+    post::{Post, PostLike},
   },
   traits::{Crud, Likeable},
 };
@@ -54,23 +54,23 @@ pub async fn like_post(
   )
   .await?;
 
-  let like_form = PostLikeForm {
-    post_id: data.post_id,
-    person_id: local_user_view.person.id,
-    score: data.score,
-  };
-
   // Remove any likes first
   let person_id = local_user_view.person.id;
 
   PostLike::remove(&mut context.pool(), person_id, post_id).await?;
 
   // Only add the like if the score isnt 0
-  let do_add = like_form.score != 0 && (like_form.score == 1 || like_form.score == -1);
+  let do_add = data.score != 0 && (data.score == 1 || data.score == -1);
   if do_add {
-    PostLike::like(&mut context.pool(), &like_form)
-      .await
-      .with_lemmy_type(LemmyErrorType::CouldntLikePost)?;
+    PostLike::like(
+      &mut context.pool(),
+      person_id,
+      post_id,
+      data.score,
+      context.settings(),
+    )
+    .await
+    .with_lemmy_type(LemmyErrorType::CouldntLikePost)?;
   }
 
   mark_post_as_read(person_id, post_id, &mut context.pool()).await?;

crates/api_crud/src/comment/create.rs

@@ -19,7 +19,7 @@ use lemmy_db_schema::{
   impls::actor_language::default_post_language,
   source::{
     actor_language::CommunityLanguage,
-    comment::{Comment, CommentInsertForm, CommentLike, CommentLikeForm},
+    comment::{Comment, CommentInsertForm, CommentLike},
     comment_reply::{CommentReply, CommentReplyUpdateForm},
     local_site::LocalSite,
     person_mention::{PersonMention, PersonMentionUpdateForm},
@@ -130,15 +130,15 @@ pub async fn create_comment(
   .await?;
 
   // You like your own comment by default
-  let like_form = CommentLikeForm {
-    comment_id: inserted_comment.id,
-    person_id: local_user_view.person.id,
-    score: 1,
-  };
-
-  CommentLike::like(&mut context.pool(), &like_form)
-    .await
-    .with_lemmy_type(LemmyErrorType::CouldntLikeComment)?;
+  CommentLike::like(
+    &mut context.pool(),
+    local_user_view.person.id,
+    inserted_comment.id,
+    1,
+    context.settings(),
+  )
+  .await
+  .with_lemmy_type(LemmyErrorType::CouldntLikeComment)?;
 
   ActivityChannel::submit_activity(
     SendActivityData::CreateComment(inserted_comment.clone()),

crates/api_crud/src/post/create.rs

@@ -22,7 +22,7 @@ use lemmy_db_schema::{
     actor_language::CommunityLanguage,
     community::Community,
     local_site::LocalSite,
-    post::{Post, PostInsertForm, PostLike, PostLikeForm},
+    post::{Post, PostInsertForm, PostLike},
   },
   traits::{Crud, Likeable},
   utils::diesel_url_create,
@@ -159,15 +159,15 @@ pub async fn create_post(
   // They like their own post by default
   let person_id = local_user_view.person.id;
   let post_id = inserted_post.id;
-  let like_form = PostLikeForm {
-    post_id,
+  PostLike::like(
+    &mut context.pool(),
     person_id,
-    score: 1,
-  };
-
-  PostLike::like(&mut context.pool(), &like_form)
-    .await
-    .with_lemmy_type(LemmyErrorType::CouldntLikePost)?;
+    post_id,
+    1,
+    context.settings(),
+  )
+  .await
+  .with_lemmy_type(LemmyErrorType::CouldntLikePost)?;
 
   mark_post_as_read(person_id, post_id, &mut context.pool()).await?;
 

crates/apub/src/activities/create_or_update/comment.rs

@@ -32,7 +32,7 @@ use lemmy_db_schema::{
   newtypes::PersonId,
   source::{
     activity::ActivitySendTargets,
-    comment::{Comment, CommentLike, CommentLikeForm},
+    comment::{Comment, CommentLike},
     community::Community,
     person::Person,
     post::Post,
@@ -151,12 +151,14 @@ impl ActivityHandler for CreateOrUpdateNote {
     let comment = ApubComment::from_json(self.object, context).await?;
 
     // author likes their own comment by default
-    let like_form = CommentLikeForm {
-      comment_id: comment.id,
-      person_id: comment.creator_id,
-      score: 1,
-    };
-    CommentLike::like(&mut context.pool(), &like_form).await?;
+    CommentLike::like(
+      &mut context.pool(),
+      comment.creator_id,
+      comment.id,
+      1,
+      context.settings(),
+    )
+    .await?;
 
     // Calculate initial hot_rank
     CommentAggregates::update_hot_rank(&mut context.pool(), comment.id).await?;

crates/apub/src/activities/create_or_update/post.rs

@@ -28,7 +28,7 @@ use lemmy_db_schema::{
     activity::ActivitySendTargets,
     community::Community,
     person::Person,
-    post::{Post, PostLike, PostLikeForm},
+    post::{Post, PostLike},
   },
   traits::{Crud, Likeable},
 };
@@ -118,12 +118,14 @@ impl ActivityHandler for CreateOrUpdatePage {
     let post = ApubPost::from_json(self.object, context).await?;
 
     // author likes their own post by default
-    let like_form = PostLikeForm {
-      post_id: post.id,
-      person_id: post.creator_id,
-      score: 1,
-    };
-    PostLike::like(&mut context.pool(), &like_form).await?;
+    PostLike::like(
+      &mut context.pool(),
+      post.creator_id,
+      post.id,
+      1,
+      context.settings(),
+    )
+    .await?;
 
     // Calculate initial hot_rank for post
     PostAggregates::update_ranks(&mut context.pool(), post.id).await?;

crates/apub/src/activities/voting/mod.rs

@@ -14,10 +14,10 @@ use lemmy_db_schema::{
   newtypes::DbUrl,
   source::{
     activity::ActivitySendTargets,
-    comment::{CommentLike, CommentLikeForm},
+    comment::CommentLike,
     community::Community,
     person::Person,
-    post::{PostLike, PostLikeForm},
+    post::PostLike,
   },
   traits::Likeable,
 };
@@ -59,15 +59,15 @@ async fn vote_comment(
   comment: &ApubComment,
   context: &Data<LemmyContext>,
 ) -> LemmyResult<()> {
-  let comment_id = comment.id;
-  let like_form = CommentLikeForm {
-    comment_id,
-    person_id: actor.id,
-    score: vote_type.into(),
-  };
-  let person_id = actor.id;
-  CommentLike::remove(&mut context.pool(), person_id, comment_id).await?;
-  CommentLike::like(&mut context.pool(), &like_form).await?;
+  CommentLike::remove(&mut context.pool(), actor.id, comment.id).await?;
+  CommentLike::like(
+    &mut context.pool(),
+    actor.id,
+    comment.id,
+    vote_type.into(),
+    context.settings(),
+  )
+  .await?;
   Ok(())
 }
 
@@ -78,15 +78,15 @@ async fn vote_post(
   post: &ApubPost,
   context: &Data<LemmyContext>,
 ) -> LemmyResult<()> {
-  let post_id = post.id;
-  let like_form = PostLikeForm {
-    post_id: post.id,
-    person_id: actor.id,
-    score: vote_type.into(),
-  };
-  let person_id = actor.id;
-  PostLike::remove(&mut context.pool(), person_id, post_id).await?;
-  PostLike::like(&mut context.pool(), &like_form).await?;
+  PostLike::remove(&mut context.pool(), actor.id, post.id).await?;
+  PostLike::like(
+    &mut context.pool(),
+    actor.id,
+    post.id,
+    vote_type.into(),
+    context.settings(),
+  )
+  .await?;
   Ok(())
 }
 

crates/db_schema/src/aggregates/comment_aggregates.rs

@@ -35,7 +35,7 @@ mod tests {
   use crate::{
     aggregates::comment_aggregates::CommentAggregates,
     source::{
-      comment::{Comment, CommentInsertForm, CommentLike, CommentLikeForm},
+      comment::{Comment, CommentInsertForm, CommentLike},
       community::{Community, CommunityInsertForm},
       instance::Instance,
       person::{Person, PersonInsertForm},
@@ -45,6 +45,7 @@ mod tests {
     utils::build_db_pool_for_tests,
   };
   use diesel::result::Error;
+  use lemmy_utils::settings::structs::Settings;
   use pretty_assertions::assert_eq;
   use serial_test::serial;
 
@@ -94,13 +95,8 @@ mod tests {
     let _inserted_child_comment =
       Comment::create(pool, &child_comment_form, Some(&inserted_comment.path)).await?;
 
-    let comment_like = CommentLikeForm {
-      comment_id: inserted_comment.id,
-      person_id: inserted_person.id,
-      score: 1,
-    };
-
-    CommentLike::like(pool, &comment_like).await?;
+    let settings = Settings::default();
+    CommentLike::like(pool, inserted_person.id, inserted_comment.id, 1, &settings).await?;
 
     let comment_aggs_before_delete = CommentAggregates::read(pool, inserted_comment.id).await?;
 
@@ -109,13 +105,14 @@ mod tests {
     assert_eq!(0, comment_aggs_before_delete.downvotes);
 
     // Add a post dislike from the other person
-    let comment_dislike = CommentLikeForm {
-      comment_id: inserted_comment.id,
-      person_id: another_inserted_person.id,
-      score: -1,
-    };
-
-    CommentLike::like(pool, &comment_dislike).await?;
+    CommentLike::like(
+      pool,
+      another_inserted_person.id,
+      inserted_comment.id,
+      -1,
+      &settings,
+    )
+    .await?;
 
     let comment_aggs_after_dislike = CommentAggregates::read(pool, inserted_comment.id).await?;
 

crates/db_schema/src/aggregates/person_aggregates.rs

@@ -20,16 +20,17 @@ mod tests {
   use crate::{
     aggregates::person_aggregates::PersonAggregates,
     source::{
-      comment::{Comment, CommentInsertForm, CommentLike, CommentLikeForm, CommentUpdateForm},
+      comment::{Comment, CommentInsertForm, CommentLike, CommentUpdateForm},
       community::{Community, CommunityInsertForm},
       instance::Instance,
       person::{Person, PersonInsertForm},
-      post::{Post, PostInsertForm, PostLike, PostLikeForm},
+      post::{Post, PostInsertForm, PostLike},
     },
     traits::{Crud, Likeable},
     utils::build_db_pool_for_tests,
   };
   use diesel::result::Error;
+  use lemmy_utils::settings::structs::Settings;
   use pretty_assertions::assert_eq;
   use serial_test::serial;
 
@@ -65,12 +66,8 @@ mod tests {
     );
     let inserted_post = Post::create(pool, &new_post).await?;
 
-    let post_like = PostLikeForm {
-      post_id: inserted_post.id,
-      person_id: inserted_person.id,
-      score: 1,
-    };
-    let _inserted_post_like = PostLike::like(pool, &post_like).await?;
+    let settings = Settings::default();
+    PostLike::like(pool, inserted_person.id, inserted_post.id, 1, &settings).await?;
 
     let comment_form = CommentInsertForm::new(
       inserted_person.id,
@@ -79,13 +76,7 @@ mod tests {
     );
     let inserted_comment = Comment::create(pool, &comment_form, None).await?;
 
-    let mut comment_like = CommentLikeForm {
-      comment_id: inserted_comment.id,
-      person_id: inserted_person.id,
-      score: 1,
-    };
-
-    let _inserted_comment_like = CommentLike::like(pool, &comment_like).await?;
+    CommentLike::like(pool, inserted_person.id, inserted_comment.id, 1, &settings).await?;
 
     let child_comment_form = CommentInsertForm::new(
       inserted_person.id,
@@ -95,13 +86,14 @@ mod tests {
     let inserted_child_comment =
       Comment::create(pool, &child_comment_form, Some(&inserted_comment.path)).await?;
 
-    let child_comment_like = CommentLikeForm {
-      comment_id: inserted_child_comment.id,
-      person_id: another_inserted_person.id,
-      score: 1,
-    };
-
-    let _inserted_child_comment_like = CommentLike::like(pool, &child_comment_like).await?;
+    CommentLike::like(
+      pool,
+      another_inserted_person.id,
+      inserted_child_comment.id,
+      1,
+      &settings,
+    )
+    .await?;
 
     let person_aggregates_before_delete = PersonAggregates::read(pool, inserted_person.id).await?;
 
@@ -151,8 +143,14 @@ mod tests {
     let new_parent_comment = Comment::create(pool, &comment_form, None).await?;
     let _new_child_comment =
       Comment::create(pool, &child_comment_form, Some(&new_parent_comment.path)).await?;
-    comment_like.comment_id = new_parent_comment.id;
-    CommentLike::like(pool, &comment_like).await?;
+    CommentLike::like(
+      pool,
+      inserted_person.id,
+      new_parent_comment.id,
+      1,
+      &settings,
+    )
+    .await?;
     let after_comment_add = PersonAggregates::read(pool, inserted_person.id).await?;
     assert_eq!(2, after_comment_add.comment_count);
     // TODO: fix person aggregate comment score calculation

crates/db_schema/src/aggregates/post_aggregates.rs

@@ -58,12 +58,13 @@ mod tests {
       community::{Community, CommunityInsertForm},
       instance::Instance,
       person::{Person, PersonInsertForm},
-      post::{Post, PostInsertForm, PostLike, PostLikeForm},
+      post::{Post, PostInsertForm, PostLike},
     },
     traits::{Crud, Likeable},
     utils::build_db_pool_for_tests,
   };
   use diesel::result::Error;
+  use lemmy_utils::settings::structs::Settings;
   use pretty_assertions::assert_eq;
   use serial_test::serial;
 
@@ -113,13 +114,8 @@ mod tests {
     let inserted_child_comment =
       Comment::create(pool, &child_comment_form, Some(&inserted_comment.path)).await?;
 
-    let post_like = PostLikeForm {
-      post_id: inserted_post.id,
-      person_id: inserted_person.id,
-      score: 1,
-    };
-
-    PostLike::like(pool, &post_like).await?;
+    let settings = Settings::default();
+    PostLike::like(pool, inserted_person.id, inserted_post.id, 1, &settings).await?;
 
     let post_aggs_before_delete = PostAggregates::read(pool, inserted_post.id).await?;
 
@@ -129,13 +125,14 @@ mod tests {
     assert_eq!(0, post_aggs_before_delete.downvotes);
 
     // Add a post dislike from the other person
-    let post_dislike = PostLikeForm {
-      post_id: inserted_post.id,
-      person_id: another_inserted_person.id,
-      score: -1,
-    };
-
-    PostLike::like(pool, &post_dislike).await?;
+    PostLike::like(
+      pool,
+      another_inserted_person.id,
+      inserted_post.id,
+      -1,
+      &settings,
+    )
+    .await?;
 
     let post_aggs_after_dislike = PostAggregates::read(pool, inserted_post.id).await?;
 

crates/db_schema/src/impls/comment.rs

@@ -18,6 +18,7 @@ use chrono::{DateTime, Utc};
 use diesel::{dsl::insert_into, result::Error, ExpressionMethods, QueryDsl};
 use diesel_async::RunQueryDsl;
 use diesel_ltree::Ltree;
+use lemmy_utils::settings::structs::Settings;
 use url::Url;
 
 impl Comment {
@@ -138,16 +139,32 @@ impl Crud for Comment {
 
 #[async_trait]
 impl Likeable for CommentLike {
-  type Form = CommentLikeForm;
   type IdType = CommentId;
-  async fn like(pool: &mut DbPool<'_>, comment_like_form: &CommentLikeForm) -> Result<Self, Error> {
-    use crate::schema::comment_like::dsl::{comment_id, comment_like, person_id};
+  async fn like(
+    pool: &mut DbPool<'_>,
+    person_id: PersonId,
+    comment_id: Self::IdType,
+    score: i16,
+    settings: &Settings,
+  ) -> Result<Self, Error> {
+    use crate::schema::comment_like;
     let conn = &mut get_conn(pool).await?;
-    insert_into(comment_like)
-      .values(comment_like_form)
-      .on_conflict((comment_id, person_id))
+    let published = if settings.database.store_vote_timestamps {
+      Some(Utc::now())
+    } else {
+      None
+    };
+    let form = CommentLikeForm {
+      person_id,
+      comment_id,
+      score,
+      published,
+    };
+    insert_into(comment_like::table)
+      .values(&form)
+      .on_conflict((comment_like::comment_id, comment_like::person_id))
       .do_update()
-      .set(comment_like_form)
+      .set(&form)
       .get_result::<Self>(conn)
       .await
   }
@@ -205,7 +222,6 @@ mod tests {
         Comment,
         CommentInsertForm,
         CommentLike,
-        CommentLikeForm,
         CommentSaved,
         CommentSavedForm,
         CommentUpdateForm,
@@ -219,7 +235,7 @@ mod tests {
     utils::build_db_pool_for_tests,
   };
   use diesel_ltree::Ltree;
-  use lemmy_utils::error::LemmyResult;
+  use lemmy_utils::{error::LemmyResult, settings::structs::Settings};
   use pretty_assertions::assert_eq;
   use serial_test::serial;
   use url::Url;
@@ -287,18 +303,15 @@ mod tests {
       Comment::create(pool, &child_comment_form, Some(&inserted_comment.path)).await?;
 
     // Comment Like
-    let comment_like_form = CommentLikeForm {
-      comment_id: inserted_comment.id,
-      person_id: inserted_person.id,
-      score: 1,
-    };
-
-    let inserted_comment_like = CommentLike::like(pool, &comment_like_form).await?;
+    let settings = Settings::default();
+    let inserted_comment_like =
+      CommentLike::like(pool, inserted_person.id, inserted_comment.id, 1, &settings).await?;
 
     let expected_comment_like = CommentLike {
       comment_id: inserted_comment.id,
       person_id: inserted_person.id,
       score: 1,
+      published: None,
     };
 
     // Comment Saved

crates/db_schema/src/impls/post.rs

@@ -39,6 +39,7 @@ use diesel::{
   TextExpressionMethods,
 };
 use diesel_async::RunQueryDsl;
+use lemmy_utils::settings::structs::Settings;
 use std::collections::HashSet;
 
 #[async_trait]
@@ -274,15 +275,31 @@ impl Post {
 
 #[async_trait]
 impl Likeable for PostLike {
-  type Form = PostLikeForm;
   type IdType = PostId;
-  async fn like(pool: &mut DbPool<'_>, post_like_form: &PostLikeForm) -> Result<Self, Error> {
+  async fn like(
+    pool: &mut DbPool<'_>,
+    person_id: PersonId,
+    post_id: Self::IdType,
+    score: i16,
+    settings: &Settings,
+  ) -> Result<Self, Error> {
     let conn = &mut get_conn(pool).await?;
+    let published = if settings.database.store_vote_timestamps {
+      Some(Utc::now())
+    } else {
+      None
+    };
+    let form = PostLikeForm {
+      person_id,
+      post_id,
+      score,
+      published,
+    };
     insert_into(post_like::table)
-      .values(post_like_form)
+      .values(&form)
       .on_conflict((post_like::post_id, post_like::person_id))
       .do_update()
-      .set(post_like_form)
+      .set(&form)
       .get_result::<Self>(conn)
       .await
   }
@@ -399,22 +416,13 @@ mod tests {
       community::{Community, CommunityInsertForm},
       instance::Instance,
       person::{Person, PersonInsertForm},
-      post::{
-        Post,
-        PostInsertForm,
-        PostLike,
-        PostLikeForm,
-        PostRead,
-        PostSaved,
-        PostSavedForm,
-        PostUpdateForm,
-      },
+      post::{Post, PostInsertForm, PostLike, PostRead, PostSaved, PostSavedForm, PostUpdateForm},
     },
     traits::{Crud, Likeable, Saveable},
     utils::build_db_pool_for_tests,
   };
   use chrono::DateTime;
-  use lemmy_utils::error::LemmyResult;
+  use lemmy_utils::{error::LemmyResult, settings::structs::Settings};
   use pretty_assertions::assert_eq;
   use serial_test::serial;
   use std::collections::HashSet;
@@ -489,18 +497,15 @@ mod tests {
     };
 
     // Post Like
-    let post_like_form = PostLikeForm {
-      post_id: inserted_post.id,
-      person_id: inserted_person.id,
-      score: 1,
-    };
-
-    let inserted_post_like = PostLike::like(pool, &post_like_form).await?;
+    let settings = Settings::default();
+    let inserted_post_like =
+      PostLike::like(pool, inserted_person.id, inserted_post.id, 1, &settings).await?;
 
     let expected_post_like = PostLike {
       post_id: inserted_post.id,
       person_id: inserted_person.id,
       score: 1,
+      published: None,
     };
 
     // Post Save

crates/db_schema/src/schema.rs

@@ -124,6 +124,7 @@ diesel::table! {
         person_id -> Int4,
         comment_id -> Int4,
         score -> Int2,
+        published -> Nullable<Timestamptz>,
     }
 }
 
@@ -814,6 +815,7 @@ diesel::table! {
         post_id -> Int4,
         person_id -> Int4,
         score -> Int2,
+        published -> Nullable<Timestamptz>,
     }
 }
 

crates/db_schema/src/source/comment.rs

@@ -103,15 +103,17 @@ pub struct CommentLike {
   pub person_id: PersonId,
   pub comment_id: CommentId,
   pub score: i16,
+  pub published: Option<DateTime<Utc>>,
 }
 
 #[derive(Clone)]
 #[cfg_attr(feature = "full", derive(Insertable, AsChangeset))]
 #[cfg_attr(feature = "full", diesel(table_name = comment_like))]
-pub struct CommentLikeForm {
+pub(crate) struct CommentLikeForm {
   pub person_id: PersonId,
   pub comment_id: CommentId,
   pub score: i16,
+  pub published: Option<DateTime<Utc>>,
 }
 
 #[derive(PartialEq, Eq, Debug)]

crates/db_schema/src/source/post.rs

@@ -150,15 +150,17 @@ pub struct PostLike {
   pub post_id: PostId,
   pub person_id: PersonId,
   pub score: i16,
+  pub published: Option<DateTime<Utc>>,
 }
 
 #[derive(Clone)]
 #[cfg_attr(feature = "full", derive(Insertable, AsChangeset))]
 #[cfg_attr(feature = "full", diesel(table_name = post_like))]
-pub struct PostLikeForm {
+pub(crate) struct PostLikeForm {
   pub post_id: PostId,
   pub person_id: PersonId,
   pub score: i16,
+  pub published: Option<DateTime<Utc>>,
 }
 
 #[derive(PartialEq, Eq, Debug)]

crates/db_schema/src/traits.rs

@@ -15,6 +15,7 @@ use diesel_async::{
   AsyncPgConnection,
   RunQueryDsl,
 };
+use lemmy_utils::settings::structs::Settings;
 
 /// Returned by `diesel::delete`
 pub type Delete<T> = DeleteStatement<<T as HasTable>::Table, <T as IntoUpdateTarget>::WhereClause>;
@@ -94,9 +95,14 @@ pub trait Joinable {
 
 #[async_trait]
 pub trait Likeable {
-  type Form;
   type IdType;
-  async fn like(pool: &mut DbPool<'_>, form: &Self::Form) -> Result<Self, Error>
+  async fn like(
+    pool: &mut DbPool<'_>,
+    person_id: PersonId,
+    item_id: Self::IdType,
+    score: i16,
+    settings: &Settings,
+  ) -> Result<Self, Error>
   where
     Self: Sized;
   async fn remove(

crates/db_views/src/comment_view.rs

@@ -438,7 +438,6 @@ mod tests {
         Comment,
         CommentInsertForm,
         CommentLike,
-        CommentLikeForm,
         CommentSaved,
         CommentSavedForm,
         CommentUpdateForm,
@@ -466,7 +465,7 @@ mod tests {
     CommunityVisibility,
     SubscribedType,
   };
-  use lemmy_utils::error::LemmyResult;
+  use lemmy_utils::{error::LemmyResult, settings::structs::Settings};
   use pretty_assertions::assert_eq;
   use serial_test::serial;
 
@@ -599,13 +598,15 @@ mod tests {
     };
     assert_eq!(expected_block, inserted_block);
 
-    let comment_like_form = CommentLikeForm {
-      comment_id: inserted_comment_0.id,
-      person_id: inserted_timmy_person.id,
-      score: 1,
-    };
-
-    let _inserted_comment_like = CommentLike::like(pool, &comment_like_form).await?;
+    let settings = Settings::default();
+    CommentLike::like(
+      pool,
+      inserted_timmy_person.id,
+      inserted_comment_0.id,
+      1,
+      &settings,
+    )
+    .await?;
 
     let timmy_local_user_view = LocalUserView {
       local_user: inserted_timmy_local_user.clone(),
@@ -698,12 +699,15 @@ mod tests {
     PersonBlock::unblock(pool, &timmy_unblocks_sara_form).await?;
 
     // Like a new comment
-    let comment_like_form = CommentLikeForm {
-      comment_id: data.inserted_comment_1.id,
-      person_id: data.timmy_local_user_view.person.id,
-      score: 1,
-    };
-    CommentLike::like(pool, &comment_like_form).await?;
+    let settings = Settings::default();
+    CommentLike::like(
+      pool,
+      data.timmy_local_user_view.person.id,
+      data.inserted_comment_1.id,
+      1,
+      &settings,
+    )
+    .await?;
 
     let read_liked_comment_views = CommentQuery {
       local_user: Some(&data.timmy_local_user_view.local_user),

crates/db_views/src/post_view.rs

@@ -759,7 +759,6 @@ mod tests {
         PostHide,
         PostInsertForm,
         PostLike,
-        PostLikeForm,
         PostRead,
         PostSaved,
         PostSavedForm,
@@ -773,7 +772,7 @@ mod tests {
     PostSortType,
     SubscribedType,
   };
-  use lemmy_utils::error::LemmyResult;
+  use lemmy_utils::{error::LemmyResult, settings::structs::Settings};
   use pretty_assertions::assert_eq;
   use serial_test::serial;
   use std::{collections::HashSet, time::Duration};
@@ -1114,18 +1113,21 @@ mod tests {
     let pool = &mut pool.into();
     let mut data = init_data(pool).await?;
 
-    let post_like_form = PostLikeForm {
-      post_id: data.inserted_post.id,
-      person_id: data.local_user_view.person.id,
-      score: 1,
-    };
-
-    let inserted_post_like = PostLike::like(pool, &post_like_form).await?;
+    let settings = Settings::default();
+    let inserted_post_like = PostLike::like(
+      pool,
+      data.local_user_view.person.id,
+      data.inserted_post.id,
+      1,
+      &settings,
+    )
+    .await?;
 
     let expected_post_like = PostLike {
       post_id: data.inserted_post.id,
       person_id: data.local_user_view.person.id,
       score: 1,
+      published: None,
     };
     assert_eq!(expected_post_like, inserted_post_like);
 
@@ -1173,19 +1175,24 @@ mod tests {
 
     // Like both the bot post, and your own
     // The liked_only should not show your own post
-    let post_like_form = PostLikeForm {
-      post_id: data.inserted_post.id,
-      person_id: data.local_user_view.person.id,
-      score: 1,
-    };
-    PostLike::like(pool, &post_like_form).await?;
+    let settings = Settings::default();
+    PostLike::like(
+      pool,
+      data.local_user_view.person.id,
+      data.inserted_post.id,
+      1,
+      &settings,
+    )
+    .await?;
 
-    let bot_post_like_form = PostLikeForm {
-      post_id: data.inserted_bot_post.id,
-      person_id: data.local_user_view.person.id,
-      score: 1,
-    };
-    PostLike::like(pool, &bot_post_like_form).await?;
+    PostLike::like(
+      pool,
+      data.local_user_view.person.id,
+      data.inserted_bot_post.id,
+      1,
+      &settings,
+    )
+    .await?;
 
     // Read the liked only
     let read_liked_post_listing = PostQuery {

crates/db_views/src/structs.rs

@@ -1,3 +1,4 @@
+use chrono::{DateTime, Utc};
 #[cfg(feature = "full")]
 use diesel::Queryable;
 use lemmy_db_schema::{
@@ -216,6 +217,7 @@ pub struct VoteView {
   pub creator: Person,
   pub creator_banned_from_community: bool,
   pub score: i16,
+  pub published: Option<DateTime<Utc>>,
 }
 
 #[skip_serializing_none]

crates/db_views/src/vote_view.rs

@@ -40,6 +40,7 @@ impl VoteView {
         person::all_columns,
         community_person_ban::community_id.nullable().is_not_null(),
         post_like::score,
+        post_like::published,
       ))
       .order_by(post_like::score)
       .limit(limit)
@@ -74,6 +75,7 @@ impl VoteView {
         person::all_columns,
         community_person_ban::community_id.nullable().is_not_null(),
         comment_like::score,
+        comment_like::published,
       ))
       .order_by(comment_like::score)
       .limit(limit)
@@ -89,16 +91,16 @@ mod tests {
   use crate::structs::VoteView;
   use lemmy_db_schema::{
     source::{
-      comment::{Comment, CommentInsertForm, CommentLike, CommentLikeForm},
+      comment::{Comment, CommentInsertForm, CommentLike},
       community::{Community, CommunityInsertForm, CommunityPersonBan, CommunityPersonBanForm},
       instance::Instance,
       person::{Person, PersonInsertForm},
-      post::{Post, PostInsertForm, PostLike, PostLikeForm},
+      post::{Post, PostInsertForm, PostLike},
     },
     traits::{Bannable, Crud, Likeable},
     utils::build_db_pool_for_tests,
   };
-  use lemmy_utils::error::LemmyResult;
+  use lemmy_utils::{error::LemmyResult, settings::structs::Settings};
   use pretty_assertions::assert_eq;
   use serial_test::serial;
 
@@ -141,31 +143,24 @@ mod tests {
     let inserted_comment = Comment::create(pool, &comment_form, None).await?;
 
     // Timmy upvotes his own post
-    let timmy_post_vote_form = PostLikeForm {
-      post_id: inserted_post.id,
-      person_id: inserted_timmy.id,
-      score: 1,
-    };
-    PostLike::like(pool, &timmy_post_vote_form).await?;
+    let settings = Settings::default();
+    PostLike::like(pool, inserted_timmy.id, inserted_post.id, 1, &settings).await?;
 
     // Sara downvotes timmy's post
-    let sara_post_vote_form = PostLikeForm {
-      post_id: inserted_post.id,
-      person_id: inserted_sara.id,
-      score: -1,
-    };
-    PostLike::like(pool, &sara_post_vote_form).await?;
+    PostLike::like(pool, inserted_sara.id, inserted_post.id, -1, &settings).await?;
 
     let expected_post_vote_views = [
       VoteView {
         creator: inserted_sara.clone(),
         creator_banned_from_community: false,
         score: -1,
+        published: None,
       },
       VoteView {
         creator: inserted_timmy.clone(),
         creator_banned_from_community: false,
         score: 1,
+        published: None,
       },
     ];
 
@@ -173,31 +168,23 @@ mod tests {
     assert_eq!(read_post_vote_views, expected_post_vote_views);
 
     // Timothy votes down his own comment
-    let timmy_comment_vote_form = CommentLikeForm {
-      comment_id: inserted_comment.id,
-      person_id: inserted_timmy.id,
-      score: -1,
-    };
-    CommentLike::like(pool, &timmy_comment_vote_form).await?;
+    CommentLike::like(pool, inserted_timmy.id, inserted_comment.id, -1, &settings).await?;
 
     // Sara upvotes timmy's comment
-    let sara_comment_vote_form = CommentLikeForm {
-      comment_id: inserted_comment.id,
-      person_id: inserted_sara.id,
-      score: 1,
-    };
-    CommentLike::like(pool, &sara_comment_vote_form).await?;
+    CommentLike::like(pool, inserted_sara.id, inserted_comment.id, 1, &settings).await?;
 
     let expected_comment_vote_views = [
       VoteView {
         creator: inserted_timmy.clone(),
         creator_banned_from_community: false,
         score: -1,
+        published: None,
       },
       VoteView {
         creator: inserted_sara.clone(),
         creator_banned_from_community: false,
         score: 1,
+        published: None,
       },
     ];
 

crates/utils/src/settings/structs.rs

@@ -128,6 +128,11 @@ pub struct DatabaseConfig {
   /// Maximum number of active sql connections
   #[default(30)]
   pub pool_size: usize,
+
+  /// Set true to store the time when votes were cast. Requires more storage space but can be
+  /// used to detect vote manipulation.
+  #[default(false)]
+  pub store_vote_timestamps: bool,
 }
 
 #[derive(Debug, Deserialize, Serialize, Clone, SmartDefault, Document)]

migrations/2024-10-17-091053_vote-no-timestamp/down.sql

@@ -1,9 +1,17 @@
+-- make published not null again and add default
 ALTER TABLE post_like
-    ADD COLUMN published timestamptz NOT NULL DEFAULT now();
+    ALTER COLUMN published SET NOT NULL;
+
+ALTER TABLE post_like
+    ALTER COLUMN published SET DEFAULT now();
 
 ALTER TABLE comment_like
-    ADD COLUMN published timestamptz NOT NULL DEFAULT now();
+    ALTER COLUMN published DROP NOT NULL;
 
+ALTER TABLE comment_like
+    ALTER COLUMN published SET DEFAULT now();
+
+-- restore comment_like.post_id
 ALTER TABLE comment_like
     ADD COLUMN post_id int REFERENCES post ON UPDATE CASCADE ON DELETE CASCADE;
 

migrations/2024-10-17-091053_vote-no-timestamp/up.sql

@@ -1,21 +1,18 @@
--- set all column values to null to reclaim disk space
--- https://dba.stackexchange.com/a/117513
+-- make published columns nullable and remove default value
 ALTER TABLE post_like
     ALTER COLUMN published DROP NOT NULL;
 
-UPDATE
-    post_like
-SET
-    published = NULL;
+ALTER TABLE post_like
+    ALTER COLUMN published DROP DEFAULT;
 
 ALTER TABLE comment_like
     ALTER COLUMN published DROP NOT NULL;
 
-UPDATE
-    comment_like
-SET
-    published = NULL;
+ALTER TABLE comment_like
+    ALTER COLUMN published DROP DEFAULT;
 
+-- get rid of comment_like.post_id, setting null first to reclaim space
+-- https://dba.stackexchange.com/a/117513
 ALTER TABLE comment_like
     ALTER COLUMN post_id DROP NOT NULL;
 
@@ -25,12 +22,6 @@ SET
     post_id = NULL;
 
 -- drop the columns
-ALTER TABLE post_like
-    DROP published;
-
-ALTER TABLE comment_like
-    DROP published;
-
 ALTER TABLE comment_like
     DROP post_id;