feat(labrinth): rework v3 side types to a single environment field (#3701)

* feat(labrinth): rework v3 side types to a single `environment` field

This field is meant to be able to represent the existing v2 side type
information and beyond, in a way that may also be slightly easier to
comprehend.

* chore(labrinth/migrations): use proper val for `HAVING` clause

* feat(labrinth): add `side_types_migration_review_status` field to projects

apps/labrinth/.sqlx/query-374c234b92b838b0bd65de100a9008b0fb78c79976fd858e0599e1ccb7f08b82.json

@@ -0,0 +1,15 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "\n            UPDATE mods\n            SET side_types_migration_review_status = $1\n            WHERE id = $2\n            ",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Left": [
+        "Varchar",
+        "Int8"
+      ]
+    },
+    "nullable": []
+  },
+  "hash": "374c234b92b838b0bd65de100a9008b0fb78c79976fd858e0599e1ccb7f08b82"
+}

apps/labrinth/.sqlx/query-7a6d6a91e6bd27f7be34b8cc7955a66c4175ebd1c55e437f187f61efca681c62.json

@@ -1,6 +1,6 @@
 {
   "db_name": "PostgreSQL",
-  "query": "\n                    SELECT m.id id, m.name name, m.summary summary, m.downloads downloads, m.follows follows,\n                    m.icon_url icon_url, m.raw_icon_url raw_icon_url, m.description description, m.published published,\n                    m.approved approved, m.queued, m.status status, m.requested_status requested_status,\n                    m.license_url license_url,\n                    m.team_id team_id, m.organization_id organization_id, m.license license, m.slug slug, m.moderation_message moderation_message, m.moderation_message_body moderation_message_body,\n                    m.webhook_sent, m.color,\n                    t.id thread_id, m.monetization_status monetization_status,\n                    ARRAY_AGG(DISTINCT c.category) filter (where c.category is not null and mc.is_additional is false) categories,\n                    ARRAY_AGG(DISTINCT c.category) filter (where c.category is not null and mc.is_additional is true) additional_categories\n                    FROM mods m\n                    INNER JOIN threads t ON t.mod_id = m.id\n                    LEFT JOIN mods_categories mc ON mc.joining_mod_id = m.id\n                    LEFT JOIN categories c ON mc.joining_category_id = c.id\n                    WHERE m.id = ANY($1) OR m.slug = ANY($2)\n                    GROUP BY t.id, m.id;\n                    ",
+  "query": "\n                    SELECT m.id id, m.name name, m.summary summary, m.downloads downloads, m.follows follows,\n                    m.icon_url icon_url, m.raw_icon_url raw_icon_url, m.description description, m.published published,\n                    m.approved approved, m.queued, m.status status, m.requested_status requested_status,\n                    m.license_url license_url,\n                    m.team_id team_id, m.organization_id organization_id, m.license license, m.slug slug, m.moderation_message moderation_message, m.moderation_message_body moderation_message_body,\n                    m.webhook_sent, m.color,\n                    t.id thread_id, m.monetization_status monetization_status,\n                    m.side_types_migration_review_status side_types_migration_review_status,\n                    ARRAY_AGG(DISTINCT c.category) filter (where c.category is not null and mc.is_additional is false) categories,\n                    ARRAY_AGG(DISTINCT c.category) filter (where c.category is not null and mc.is_additional is true) additional_categories\n                    FROM mods m\n                    INNER JOIN threads t ON t.mod_id = m.id\n                    LEFT JOIN mods_categories mc ON mc.joining_mod_id = m.id\n                    LEFT JOIN categories c ON mc.joining_category_id = c.id\n                    WHERE m.id = ANY($1) OR m.slug = ANY($2)\n                    GROUP BY t.id, m.id;\n                    ",
   "describe": {
     "columns": [
       {
@@ -125,11 +125,16 @@
       },
       {
         "ordinal": 24,
+        "name": "side_types_migration_review_status",
+        "type_info": "Varchar"
+      },
+      {
+        "ordinal": 25,
         "name": "categories",
         "type_info": "VarcharArray"
       },
       {
-        "ordinal": 25,
+        "ordinal": 26,
         "name": "additional_categories",
         "type_info": "VarcharArray"
       }
@@ -165,9 +170,10 @@
       true,
       false,
       false,
+      false,
       null,
       null
     ]
   },
-  "hash": "5f75c0c48083de27f853ee877aac070567fd2ed2be4a9a038821b790dd7cb763"
+  "hash": "7a6d6a91e6bd27f7be34b8cc7955a66c4175ebd1c55e437f187f61efca681c62"
 }

apps/labrinth/.sqlx/query-ee74bbff42dd29ab5a23d5811ea18e62ac199fe5e68275bf1bc7c71ace630702.json

@@ -1,6 +1,6 @@
 {
   "db_name": "PostgreSQL",
-  "query": "\n            INSERT INTO mods (\n                id, team_id, name, summary, description,\n                published, downloads, icon_url, raw_icon_url, status, requested_status,\n                license_url, license,\n                slug, color, monetization_status, organization_id\n            )\n            VALUES (\n                $1, $2, $3, $4, $5, $6,\n                $7, $8, $9, $10, $11,\n                $12, $13,\n                LOWER($14), $15, $16, $17\n            )\n            ",
+  "query": "\n            INSERT INTO mods (\n                id, team_id, name, summary, description,\n                published, downloads, icon_url, raw_icon_url, status, requested_status,\n                license_url, license,\n                slug, color, monetization_status, organization_id,\n                side_types_migration_review_status\n            )\n            VALUES (\n                $1, $2, $3, $4, $5, $6,\n                $7, $8, $9, $10, $11,\n                $12, $13,\n                LOWER($14), $15, $16, $17,\n                $18\n            )\n            ",
   "describe": {
     "columns": [],
     "parameters": {
@@ -21,10 +21,11 @@
         "Text",
         "Int4",
         "Varchar",
-        "Int8"
+        "Int8",
+        "Varchar"
       ]
     },
     "nullable": []
   },
-  "hash": "bcbcac3c0b2b2b0327577d3095fa744ab42f7f1dcd2b7f3c3dace12b899b3f38"
+  "hash": "ee74bbff42dd29ab5a23d5811ea18e62ac199fe5e68275bf1bc7c71ace630702"
 }

apps/labrinth/migrations/20250523174544_project-versions-environments.sql

@@ -0,0 +1,122 @@
+DO LANGUAGE plpgsql $$
+DECLARE
+    VAR_env_field_id INT;
+    VAR_env_field_enum_id INT := 4; -- Known available ID for a new enum type
+BEGIN
+
+-- Define a new loader field for environment
+INSERT INTO loader_field_enums (id, enum_name, ordering, hidable)
+    VALUES (VAR_env_field_enum_id, 'environment', NULL, TRUE);
+
+INSERT INTO loader_field_enum_values (enum_id, value, ordering, created, metadata)
+    VALUES
+        -- Must be installed on both client and (integrated) server
+        (VAR_env_field_enum_id, 'client_and_server', NULL, NOW(), NULL),
+        -- Must be installed only on the client
+        (VAR_env_field_enum_id, 'client_only', NULL, NOW(), NULL),
+        -- Must be installed on the client, may be installed on a (integrated) server. To be displayed as a
+        -- client mod
+        (VAR_env_field_enum_id, 'client_only_server_optional', NULL, NOW(), NULL),
+        -- Must be installed only on the integrated singleplayer server. To be displayed as a server mod for
+        -- singleplayer exclusively
+        (VAR_env_field_enum_id, 'singleplayer_only', NULL, NOW(), NULL),
+        -- Must be installed only on a (integrated) server
+        (VAR_env_field_enum_id, 'server_only', NULL, NOW(), NULL),
+        -- Must be installed on the server, may be installed on the client. To be displayed as a
+        -- singleplayer-compatible server mod
+        (VAR_env_field_enum_id, 'server_only_client_optional', NULL, NOW(), NULL),
+        -- Must be installed only on a dedicated multiplayer server (not the integrated singleplayer server).
+        -- To be displayed as an server mod for multiplayer exclusively
+        (VAR_env_field_enum_id, 'dedicated_server_only', NULL, NOW(), NULL),
+        -- Can be installed on both client and server, with no strong preference for either. To be displayed
+        -- as both a client and server mod
+        (VAR_env_field_enum_id, 'client_or_server', NULL, NOW(), NULL),
+        -- Can be installed on both client and server, with a preference for being installed on both. To be
+        -- displayed as a client and server mod
+        (VAR_env_field_enum_id, 'client_or_server_prefers_both', NULL, NOW(), NULL),
+        (VAR_env_field_enum_id, 'unknown', NULL, NOW(), NULL);
+
+INSERT INTO loader_fields (field, field_type, enum_type, optional)
+    VALUES ('environment', 'enum', VAR_env_field_enum_id, FALSE)
+    RETURNING id INTO VAR_env_field_id;
+
+-- Update version_fields to have the new environment field, initializing it from the
+-- values of the previous fields
+INSERT INTO version_fields (version_id, field_id, enum_value)
+    SELECT vf.version_id, VAR_env_field_id, (
+        SELECT id
+        FROM loader_field_enum_values
+        WHERE enum_id = VAR_env_field_enum_id
+        AND value = (
+            CASE jsonb_object_agg(lf.field, vf.int_value)
+                WHEN '{ "server_only": 0, "singleplayer": 0, "client_and_server": 0, "client_only": 1 }'::jsonb THEN 'client_only'
+                WHEN '{ "server_only": 0, "singleplayer": 0, "client_and_server": 1, "client_only": 0 }'::jsonb THEN 'client_and_server'
+                WHEN '{ "server_only": 0, "singleplayer": 0, "client_and_server": 1, "client_only": 1 }'::jsonb THEN 'client_only_server_optional'
+                WHEN '{ "server_only": 0, "singleplayer": 1, "client_and_server": 0, "client_only": 0 }'::jsonb THEN 'singleplayer_only'
+                WHEN '{ "server_only": 0, "singleplayer": 1, "client_and_server": 0, "client_only": 1 }'::jsonb THEN 'client_only'
+                WHEN '{ "server_only": 0, "singleplayer": 1, "client_and_server": 1, "client_only": 0 }'::jsonb THEN 'client_and_server'
+                WHEN '{ "server_only": 0, "singleplayer": 1, "client_and_server": 1, "client_only": 1 }'::jsonb THEN 'client_only_server_optional'
+                WHEN '{ "server_only": 1, "singleplayer": 0, "client_and_server": 0, "client_only": 0 }'::jsonb THEN 'server_only'
+                WHEN '{ "server_only": 1, "singleplayer": 0, "client_and_server": 0, "client_only": 1 }'::jsonb THEN 'client_or_server'
+                WHEN '{ "server_only": 1, "singleplayer": 0, "client_and_server": 1, "client_only": 0 }'::jsonb THEN 'server_only_client_optional'
+                WHEN '{ "server_only": 1, "singleplayer": 0, "client_and_server": 1, "client_only": 1 }'::jsonb THEN 'client_or_server_prefers_both'
+                WHEN '{ "server_only": 1, "singleplayer": 1, "client_and_server": 0, "client_only": 0 }'::jsonb THEN 'server_only'
+                WHEN '{ "server_only": 1, "singleplayer": 1, "client_and_server": 0, "client_only": 1 }'::jsonb THEN 'client_or_server'
+                WHEN '{ "server_only": 1, "singleplayer": 1, "client_and_server": 1, "client_only": 0 }'::jsonb THEN 'server_only_client_optional'
+                WHEN '{ "server_only": 1, "singleplayer": 1, "client_and_server": 1, "client_only": 1 }'::jsonb THEN 'client_or_server_prefers_both'
+                ELSE 'unknown'
+            END
+        )
+    )
+    FROM version_fields vf
+    JOIN loader_fields lf ON vf.field_id = lf.id
+    WHERE lf.field IN ('server_only', 'singleplayer', 'client_and_server', 'client_only')
+    GROUP BY vf.version_id
+    HAVING COUNT(DISTINCT lf.field) = 4;
+
+-- Clean up old fields from the project versions
+DELETE FROM version_fields
+    WHERE field_id IN (
+        SELECT id
+        FROM loader_fields
+        WHERE field IN ('server_only', 'singleplayer', 'client_and_server', 'client_only')
+    );
+
+-- Switch loader fields definitions on the available loaders to use the new environment field
+ALTER TABLE loader_fields_loaders DROP CONSTRAINT unique_loader_field;
+ALTER TABLE loader_fields_loaders DROP CONSTRAINT loader_fields_loaders_pkey;
+
+UPDATE loader_fields_loaders
+    SET loader_field_id = VAR_env_field_id
+    WHERE loader_field_id IN (
+        SELECT id
+        FROM loader_fields
+        WHERE field IN ('server_only', 'singleplayer', 'client_and_server', 'client_only')
+    );
+
+-- Remove duplicate (loader_id, loader_field_id) pairs that may have been created due to several
+-- old fields being converted to a single new field
+DELETE FROM loader_fields_loaders
+    WHERE ctid NOT IN (
+        SELECT MIN(ctid)
+        FROM loader_fields_loaders
+        GROUP BY loader_id, loader_field_id
+    );
+
+-- Having both a PK and UNIQUE constraint for the same columns is redundant, so only restore the PK
+ALTER TABLE loader_fields_loaders ADD PRIMARY KEY (loader_id, loader_field_id);
+
+-- Finally, remove the old loader fields
+DELETE FROM loader_fields
+    WHERE field IN ('server_only', 'singleplayer', 'client_and_server', 'client_only');
+
+-- Add a field to the projects table to track whether the new environment field value has been
+-- reviewed to be appropriate after automated migration
+ALTER TABLE mods
+    ADD COLUMN side_types_migration_review_status VARCHAR(64) NOT NULL DEFAULT 'reviewed'
+    CHECK (side_types_migration_review_status IN ('reviewed', 'pending'));
+
+UPDATE mods SET side_types_migration_review_status = 'pending';
+
+END;
+$$

apps/labrinth/src/database/models/project_item.rs

@@ -6,7 +6,9 @@ use super::{DBUser, ids::*};
 use crate::database::models;
 use crate::database::models::DatabaseError;
 use crate::database::redis::RedisPool;
-use crate::models::projects::{MonetizationStatus, ProjectStatus};
+use crate::models::projects::{
+    MonetizationStatus, ProjectStatus, SideTypesMigrationReviewStatus,
+};
 use ariadne::ids::base62_impl::parse_base62;
 use chrono::{DateTime, Utc};
 use dashmap::{DashMap, DashSet};
@@ -210,6 +212,8 @@ impl ProjectBuilder {
             webhook_sent: false,
             color: self.color,
             monetization_status: self.monetization_status,
+            side_types_migration_review_status:
+                SideTypesMigrationReviewStatus::Reviewed,
             loaders: vec![],
         };
         project_struct.insert(&mut *transaction).await?;
@@ -288,6 +292,7 @@ pub struct DBProject {
     pub webhook_sent: bool,
     pub color: Option<u32>,
     pub monetization_status: MonetizationStatus,
+    pub side_types_migration_review_status: SideTypesMigrationReviewStatus,
     pub loaders: Vec<String>,
 }
 
@@ -302,13 +307,15 @@ impl DBProject {
                 id, team_id, name, summary, description,
                 published, downloads, icon_url, raw_icon_url, status, requested_status,
                 license_url, license,
-                slug, color, monetization_status, organization_id
+                slug, color, monetization_status, organization_id,
+                side_types_migration_review_status
             )
             VALUES (
                 $1, $2, $3, $4, $5, $6,
                 $7, $8, $9, $10, $11,
                 $12, $13,
-                LOWER($14), $15, $16, $17
+                LOWER($14), $15, $16, $17,
+                $18
             )
             ",
             self.id as DBProjectId,
@@ -328,6 +335,7 @@ impl DBProject {
             self.color.map(|x| x as i32),
             self.monetization_status.as_str(),
             self.organization_id.map(|x| x.0 as i64),
+            self.side_types_migration_review_status.as_str()
         )
         .execute(&mut **transaction)
         .await?;
@@ -770,6 +778,7 @@ impl DBProject {
                     m.team_id team_id, m.organization_id organization_id, m.license license, m.slug slug, m.moderation_message moderation_message, m.moderation_message_body moderation_message_body,
                     m.webhook_sent, m.color,
                     t.id thread_id, m.monetization_status monetization_status,
+                    m.side_types_migration_review_status side_types_migration_review_status,
                     ARRAY_AGG(DISTINCT c.category) filter (where c.category is not null and mc.is_additional is false) categories,
                     ARRAY_AGG(DISTINCT c.category) filter (where c.category is not null and mc.is_additional is true) additional_categories
                     FROM mods m
@@ -835,6 +844,9 @@ impl DBProject {
                                 monetization_status: MonetizationStatus::from_string(
                                     &m.monetization_status,
                                 ),
+                                side_types_migration_review_status: SideTypesMigrationReviewStatus::from_string(
+                                    &m.side_types_migration_review_status,
+                                ),
                                 loaders,
                             },
                             categories: m.categories.unwrap_or_default(),

apps/labrinth/src/models/v2/projects.rs

@@ -127,7 +127,7 @@ impl LegacyProject {
             .collect();
 
         if let Some(versions_item) = versions_item {
-            // Extract side types from remaining fields (singleplayer, client_only, etc)
+            // Extract side types from remaining fields
             let fields = versions_item
                 .version_fields
                 .iter()
@@ -135,7 +135,8 @@ impl LegacyProject {
                     (f.field_name.clone(), f.value.clone().serialize_internal())
                 })
                 .collect::<HashMap<_, _>>();
-            (client_side, server_side) = v2_reroute::convert_side_types_v2(
+            (client_side, server_side) =
+                v2_reroute::convert_v3_side_types_to_v2_side_types(
                     &fields,
                     Some(&*og_project_type),
                 );

apps/labrinth/src/models/v2/search.rs

@@ -102,28 +102,20 @@ impl LegacyResultSearchProject {
 
         let project_loader_fields =
             result_search_project.project_loader_fields.clone();
-        let get_one_bool_loader_field = |key: &str| {
+        let get_one_string_loader_field = |key: &str| {
             project_loader_fields
                 .get(key)
-                .cloned()
+                .map_or(&[][..], |values| values.as_slice())
-                .unwrap_or_default()
                 .first()
-                .and_then(|s| s.as_bool())
+                .and_then(|s| s.as_str())
         };
 
-        let singleplayer = get_one_bool_loader_field("singleplayer");
+        let environment =
-        let client_only =
+            get_one_string_loader_field("environment").unwrap_or("unknown");
-            get_one_bool_loader_field("client_only").unwrap_or(false);
-        let server_only =
-            get_one_bool_loader_field("server_only").unwrap_or(false);
-        let client_and_server = get_one_bool_loader_field("client_and_server");
 
         let (client_side, server_side) =
-            v2_reroute::convert_side_types_v2_bools(
+            v2_reroute::convert_v3_environment_to_v2_side_types(
-                singleplayer,
+                environment,
-                client_only,
-                server_only,
-                client_and_server,
                 Some(&*og_project_type),
             );
         let client_side = client_side.to_string();

apps/labrinth/src/models/v3/projects.rs

@@ -92,6 +92,9 @@ pub struct Project {
     /// The monetization status of this project
     pub monetization_status: MonetizationStatus,
 
+    /// The status of the manual review of the migration of side types of this project
+    pub side_types_migration_review_status: SideTypesMigrationReviewStatus,
+
     /// Aggregated loader-fields across its myriad of versions
     #[serde(flatten)]
     pub fields: HashMap<String, Vec<serde_json::Value>>,
@@ -206,6 +209,8 @@ impl From<ProjectQueryResult> for Project {
             color: m.color,
             thread_id: data.thread_id.into(),
             monetization_status: m.monetization_status,
+            side_types_migration_review_status: m
+                .side_types_migration_review_status,
             fields,
         }
     }
@@ -588,6 +593,35 @@ impl MonetizationStatus {
     }
 }
 
+/// Represents the status of the manual review of the migration of side types of this
+/// project to the new environment field.
+#[derive(Serialize, Deserialize, Copy, Clone, Debug, Eq, PartialEq)]
+#[serde(rename_all = "kebab-case")]
+pub enum SideTypesMigrationReviewStatus {
+    /// The project has been reviewed to use the new environment side types appropriately.
+    Reviewed,
+    /// The project has been automatically migrated to the new environment side types, but
+    /// the appropriateness of such migration has not been reviewed.
+    Pending,
+}
+
+impl SideTypesMigrationReviewStatus {
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            SideTypesMigrationReviewStatus::Reviewed => "reviewed",
+            SideTypesMigrationReviewStatus::Pending => "pending",
+        }
+    }
+
+    pub fn from_string(string: &str) -> SideTypesMigrationReviewStatus {
+        match string {
+            "reviewed" => SideTypesMigrationReviewStatus::Reviewed,
+            "pending" => SideTypesMigrationReviewStatus::Pending,
+            _ => SideTypesMigrationReviewStatus::Reviewed,
+        }
+    }
+}
+
 /// A specific version of a project
 #[derive(Serialize, Deserialize, Clone)]
 pub struct Version {
@@ -846,7 +880,6 @@ impl std::fmt::Display for VersionType {
 }
 
 impl VersionType {
-    // These are constant, so this can remove unneccessary allocations (`to_string`)
     pub fn as_str(&self) -> &'static str {
         match self {
             VersionType::Release => "release",

apps/labrinth/src/queue/moderation.rs

@@ -244,7 +244,7 @@ impl AutomatedModerationQueue {
                                 version_specific: HashMap::new(),
                             };
 
-                            if project.project_types.iter().any(|x| ["mod", "modpack"].contains(&&**x)) && !project.aggregate_version_fields.iter().any(|x| ["server_only", "client_only", "client_and_server", "singleplayer"].contains(&&*x.field_name)) {
+                            if project.project_types.iter().any(|x| ["mod", "modpack"].contains(&&**x)) && !project.aggregate_version_fields.iter().any(|x| x.field_name == "environment") {
                                 mod_messages.messages.push(ModerationMessage::NoSideTypes);
                             }
 

apps/labrinth/src/routes/v2/project_creation.rs

@@ -158,10 +158,12 @@ pub async fn project_create(
                 .into_iter()
                 .map(|v| {
                     let mut fields = HashMap::new();
-                    fields.extend(v2_reroute::convert_side_types_v3(
+                    fields.extend(
+                        v2_reroute::convert_v2_side_types_to_v3_side_types(
                             client_side,
                             server_side,
-                    ));
+                        ),
+                    );
                     fields.insert(
                         "game_versions".to_string(),
                         json!(v.game_versions),

apps/labrinth/src/routes/v2/projects.rs

@@ -511,6 +511,7 @@ pub async fn project_edit(
         moderation_message: v2_new_project.moderation_message,
         moderation_message_body: v2_new_project.moderation_message_body,
         monetization_status: v2_new_project.monetization_status,
+        side_types_migration_review_status: None, // Not to be exposed in v2
     };
 
     // This returns 204 or failure so we don't need to do anything with it
@@ -547,10 +548,12 @@ pub async fn project_edit(
             let version = Version::from(version);
             let mut fields = version.fields;
             let (current_client_side, current_server_side) =
-                v2_reroute::convert_side_types_v2(&fields, None);
+                v2_reroute::convert_v3_side_types_to_v2_side_types(
+                    &fields, None,
+                );
             let client_side = client_side.unwrap_or(current_client_side);
             let server_side = server_side.unwrap_or(current_server_side);
-            fields.extend(v2_reroute::convert_side_types_v3(
+            fields.extend(v2_reroute::convert_v2_side_types_to_v3_side_types(
                 client_side,
                 server_side,
             ));

apps/labrinth/src/routes/v2/version_creation.rs

@@ -105,7 +105,7 @@ pub async fn version_create(
                     json!(legacy_create.game_versions),
                 );
 
-                // Get all possible side-types for loaders given- we will use these to check if we need to convert/apply singleplayer, etc.
+                // Get all possible side-types for loaders given- we will use these to check if we need to convert/apply side types
                 let loaders =
                     match v3::tags::loader_list(client.clone(), redis.clone())
                         .await
@@ -136,54 +136,33 @@ pub async fn version_create(
                     .collect::<Vec<_>>();
 
                 // Copies side types of another version of the project.
-                // If no version exists, defaults to all false.
+                // If no version exists, defaults to an unknown side type.
                 // This is inherently lossy, but not much can be done about it, as side types are no longer associated with projects,
-                // so the 'missing' ones can't be easily accessed, and versions do need to have these fields explicitly set.
+                // so the 'missing' ones can't be easily accessed, and versions do need to have that field explicitly set.
-                let side_type_loader_field_names = [
-                    "singleplayer",
-                    "client_and_server",
-                    "client_only",
-                    "server_only",
-                ];
 
-                // Check if loader_fields_aggregate contains any of these side types
+                // Check if loader_fields_aggregate contains the side types
                 // We assume these four fields are linked together.
                 if loader_fields_aggregate
                     .iter()
-                    .any(|f| side_type_loader_field_names.contains(&f.as_str()))
+                    .any(|field| field == "environment")
                 {
-                    // If so, we get the fields of the example version of the project, and set the side types to match.
+                    // If so, we get the field of an example version of the project, and set the side types to match.
-                    fields.extend(
+                    fields.insert(
-                        side_type_loader_field_names
+                        "environment".into(),
-                            .iter()
-                            .map(|f| (f.to_string(), json!(false))),
-                    );
-                    if let Some(example_version_fields) =
                         get_example_version_fields(
                             legacy_create.project_id,
                             client,
                             &redis,
                         )
                         .await?
-                    {
+                        .into_iter()
-                        fields.extend(
+                        .flatten()
-                            example_version_fields.into_iter().filter_map(
+                        .find(|f| f.field_name == "environment")
-                                |f| {
+                        .map_or(json!("unknown"), |f| {
-                                    if side_type_loader_field_names
+                            f.value.serialize_internal()
-                                        .contains(&f.field_name.as_str())
+                        }),
-                                    {
-                                        Some((
-                                            f.field_name,
-                                            f.value.serialize_internal(),
-                                        ))
-                                    } else {
-                                        None
-                                    }
-                                },
-                            ),
                     );
                 }
-                }
                 // Handle project type via file extension prediction
                 let mut project_type = None;
                 for file_part in &legacy_create.file_parts {

apps/labrinth/src/routes/v2_reroute.rs

@@ -164,69 +164,46 @@ where
     Ok(new_multipart)
 }
 
-// Converts a "client_side" and "server_side" pair into the new v3 corresponding fields
+/// Converts V2 side types to V3 side types.
-pub fn convert_side_types_v3(
+pub fn convert_v2_side_types_to_v3_side_types(
     client_side: LegacySideType,
     server_side: LegacySideType,
 ) -> HashMap<String, Value> {
-    use LegacySideType::{Optional, Required};
+    use LegacySideType::{Optional, Required, Unsupported};
 
-    let singleplayer = client_side == Required
+    let environment = match (client_side, server_side) {
-        || client_side == Optional
+        (Required, Required) => "client_and_server", // Or "singleplayer_only"
-        || server_side == Required
+        (Required, Unsupported) => "client_only",
-        || server_side == Optional;
+        (Required, Optional) => "client_only_server_optional",
-    let client_and_server = singleplayer;
+        (Unsupported, Required) => "server_only", // Or "dedicated_server_only"
-    let client_only = (client_side == Required || client_side == Optional)
+        (Optional, Required) => "server_only_client_optional",
-        && server_side != Required;
+        (Optional, Optional) => "client_or_server", // Or "client_or_server_prefers_both"
-    let server_only = (server_side == Required || server_side == Optional)
+        _ => "unknown",
-        && client_side != Required;
+    };
 
-    let mut fields = HashMap::new();
+    [("environment".to_string(), json!(environment))]
-    fields.insert("singleplayer".to_string(), json!(singleplayer));
+        .into_iter()
-    fields.insert("client_and_server".to_string(), json!(client_and_server));
+        .collect()
-    fields.insert("client_only".to_string(), json!(client_only));
-    fields.insert("server_only".to_string(), json!(server_only));
-    fields
 }
 
-// Convert search facets from V3 back to v2
+/// Converts a V3 side types map into the corresponding V2 side types.
-// this is not lossless. (See tests)
+pub fn convert_v3_side_types_to_v2_side_types(
-pub fn convert_side_types_v2(
     side_types: &HashMap<String, Value>,
     project_type: Option<&str>,
 ) -> (LegacySideType, LegacySideType) {
-    let client_and_server = side_types
+    convert_v3_environment_to_v2_side_types(
-        .get("client_and_server")
+        side_types
-        .and_then(|x| x.as_bool())
+            .get("environment")
-        .unwrap_or(false);
+            .and_then(|x| x.as_str())
-    let singleplayer = side_types
+            .unwrap_or("unknown"),
-        .get("singleplayer")
-        .and_then(|x| x.as_bool())
-        .unwrap_or(client_and_server);
-    let client_only = side_types
-        .get("client_only")
-        .and_then(|x| x.as_bool())
-        .unwrap_or(false);
-    let server_only = side_types
-        .get("server_only")
-        .and_then(|x| x.as_bool())
-        .unwrap_or(false);
-
-    convert_side_types_v2_bools(
-        Some(singleplayer),
-        client_only,
-        server_only,
-        Some(client_and_server),
         project_type,
     )
 }
 
-// Client side, server side
+/// Converts a V3 environment and project type into the corresponding V2 side types.
-pub fn convert_side_types_v2_bools(
+/// The first side type is for the client, the second is for the server.
-    singleplayer: Option<bool>,
+pub fn convert_v3_environment_to_v2_side_types(
-    client_only: bool,
+    environment: &str,
-    server_only: bool,
-    client_and_server: Option<bool>,
     project_type: Option<&str>,
 ) -> (LegacySideType, LegacySideType) {
     use LegacySideType::{Optional, Required, Unknown, Unsupported};
@@ -236,30 +213,18 @@ pub fn convert_side_types_v2_bools(
         Some("datapack") => (Optional, Required),
         Some("shader") => (Required, Unsupported),
         Some("resourcepack") => (Required, Unsupported),
-        _ => {
+        _ => match environment {
-            let singleplayer =
+            "client_and_server" => (Required, Required),
-                singleplayer.or(client_and_server).unwrap_or(false);
+            "client_only" => (Required, Unsupported),
-
+            "client_only_server_optional" => (Required, Optional),
-            match (singleplayer, client_only, server_only) {
+            "singleplayer_only" => (Required, Required),
-                // Only singleplayer
+            "server_only" => (Unsupported, Required),
-                (true, false, false) => (Required, Required),
+            "server_only_client_optional" => (Optional, Required),
-
+            "dedicated_server_only" => (Unsupported, Required),
-                // Client only and not server only
+            "client_or_server" => (Optional, Optional),
-                (false, true, false) => (Required, Unsupported),
+            "client_or_server_prefers_both" => (Optional, Optional),
-                (true, true, false) => (Required, Unsupported),
+            _ => (Unknown, Unknown), // "unknown"
-
+        },
-                // Server only and not client only
-                (false, false, true) => (Unsupported, Required),
-                (true, false, true) => (Unsupported, Required),
-
-                // Both server only and client only
-                (true, true, true) => (Optional, Optional),
-                (false, true, true) => (Optional, Optional),
-
-                // Bad type
-                (false, false, false) => (Unknown, Unknown),
-            }
-        }
     }
 }
 
@@ -279,13 +244,14 @@ mod tests {
     };
 
     #[test]
-    fn convert_types() {
+    fn v2_v3_side_type_conversion() {
-        // Converting types from V2 to V3 and back should be idempotent- for certain pairs
+        // Only nonsensical V2 side types cannot be round-tripped from V2 to V3 and back.
+        // When converting from V3 to V2, only additional information about the
+        // singleplayer-only, multiplayer-only, or install on both sides nature of the
+        // project is lost.
         let lossy_pairs = [
             (Optional, Unsupported),
             (Unsupported, Optional),
-            (Required, Optional),
-            (Optional, Required),
             (Unsupported, Unsupported),
         ];
 
@@ -294,10 +260,13 @@ mod tests {
                 if lossy_pairs.contains(&(client_side, server_side)) {
                     continue;
                 }
-                let side_types =
+                let side_types = convert_v2_side_types_to_v3_side_types(
-                    convert_side_types_v3(client_side, server_side);
+                    client_side,
+                    server_side,
+                );
                 let (client_side2, server_side2) =
-                    convert_side_types_v2(&side_types, None);
+                    convert_v3_side_types_to_v2_side_types(&side_types, None);
+
                 assert_eq!(client_side, client_side2);
                 assert_eq!(server_side, server_side2);
             }

apps/labrinth/src/routes/v3/project_creation.rs

@@ -12,7 +12,8 @@ use crate::models::ids::{ImageId, OrganizationId, ProjectId, VersionId};
 use crate::models::images::{Image, ImageContext};
 use crate::models::pats::Scopes;
 use crate::models::projects::{
-    License, Link, MonetizationStatus, ProjectStatus, VersionStatus,
+    License, Link, MonetizationStatus, ProjectStatus,
+    SideTypesMigrationReviewStatus, VersionStatus,
 };
 use crate::models::teams::{OrganizationPermissions, ProjectPermissions};
 use crate::models::threads::ThreadType;
@@ -901,6 +902,9 @@ async fn project_create_inner(
             color: project_builder.color,
             thread_id: thread_id.into(),
             monetization_status: MonetizationStatus::Monetized,
+            // New projects are considered reviewed with respect to side types migrations
+            side_types_migration_review_status:
+                SideTypesMigrationReviewStatus::Reviewed,
             fields: HashMap::new(), // Fields instantiate to empty
         };
 

apps/labrinth/src/routes/v3/projects.rs

@@ -17,6 +17,7 @@ use crate::models::notifications::NotificationBody;
 use crate::models::pats::Scopes;
 use crate::models::projects::{
     MonetizationStatus, Project, ProjectStatus, SearchRequest,
+    SideTypesMigrationReviewStatus,
 };
 use crate::models::teams::ProjectPermissions;
 use crate::models::threads::MessageBody;
@@ -247,6 +248,8 @@ pub struct EditProject {
     #[validate(length(max = 65536))]
     pub moderation_message_body: Option<Option<String>>,
     pub monetization_status: Option<MonetizationStatus>,
+    pub side_types_migration_review_status:
+        Option<SideTypesMigrationReviewStatus>,
 }
 
 #[allow(clippy::too_many_arguments)]
@@ -844,6 +847,29 @@ pub async fn project_edit(
         .await?;
     }
 
+    if let Some(side_types_migration_review_status) =
+        &new_project.side_types_migration_review_status
+    {
+        if !perms.contains(ProjectPermissions::EDIT_DETAILS) {
+            return Err(ApiError::CustomAuthentication(
+                "You do not have the permissions to edit the side types migration review status of this project!"
+                    .to_string(),
+            ));
+        }
+
+        sqlx::query!(
+            "
+            UPDATE mods
+            SET side_types_migration_review_status = $1
+            WHERE id = $2
+            ",
+            side_types_migration_review_status.as_str(),
+            id as db_ids::DBProjectId,
+        )
+        .execute(&mut *transaction)
+        .await?;
+    }
+
     // check new description and body for links to associated images
     // if they no longer exist in the description or body, delete them
     let checkable_strings: Vec<&str> =

apps/labrinth/src/search/indexing/local_import.rs

@@ -362,7 +362,7 @@ pub async fn index_local(
                 let (_, v2_og_project_type) =
                     LegacyProject::get_project_type(&project_types);
                 let (client_side, server_side) =
-                    v2_reroute::convert_side_types_v2(
+                    v2_reroute::convert_v3_side_types_to_v2_side_types(
                         &unvectorized_loader_fields,
                         Some(&v2_og_project_type),
                     );

apps/labrinth/src/search/indexing/mod.rs

@@ -350,11 +350,8 @@ const DEFAULT_DISPLAYED_ATTRIBUTES: &[&str] = &[
     "color",
     // Note: loader fields are not here, but are added on as they are needed (so they can be dynamically added depending on which exist).
     // TODO: remove these- as they should be automatically populated. This is a band-aid fix.
-    "server_only",
+    "environment",
-    "client_only",
     "game_versions",
-    "singleplayer",
-    "client_and_server",
     "mrpack_loaders",
     // V2 legacy fields for logical consistency
     "client_side",
@@ -397,11 +394,8 @@ const DEFAULT_ATTRIBUTES_FOR_FACETING: &[&str] = &[
     "color",
     // Note: loader fields are not here, but are added on as they are needed (so they can be dynamically added depending on which exist).
     // TODO: remove these- as they should be automatically populated. This is a band-aid fix.
-    "server_only",
+    "environment",
-    "client_only",
     "game_versions",
-    "singleplayer",
-    "client_and_server",
     "mrpack_loaders",
     // V2 legacy fields for logical consistency
     "client_side",

apps/labrinth/tests/common/api_v3/request_data.rs

@@ -73,10 +73,7 @@ pub fn get_public_version_creation_data_json(
 
         // Loader fields
         "game_versions": ["1.20.1"],
-        "singleplayer": true,
+        "environment": "client_only_server_optional",
-        "client_and_server": true,
-        "client_only": true,
-        "server_only": false,
     });
     if is_modpack {
         j["mrpack_loaders"] = json!(["fabric"]);

apps/labrinth/tests/common/search.rs

@@ -63,7 +63,7 @@ pub async fn setup_search_projects(
     let id = 0;
     let modify_json = serde_json::from_value(json!([
         { "op": "add", "path": "/categories", "value": DUMMY_CATEGORIES[4..6] },
-        { "op": "add", "path": "/initial_versions/0/server_only", "value": true },
+        { "op": "add", "path": "/initial_versions/0/environment", "value": "server_only" },
         { "op": "add", "path": "/license_id", "value": "LGPL-3.0-or-later" },
     ]))
     .unwrap();
@@ -78,7 +78,7 @@ pub async fn setup_search_projects(
     let id = 1;
     let modify_json = serde_json::from_value(json!([
         { "op": "add", "path": "/categories", "value": DUMMY_CATEGORIES[0..2] },
-        { "op": "add", "path": "/initial_versions/0/client_only", "value": false },
+        { "op": "add", "path": "/initial_versions/0/environment", "value": "client_or_server" },
     ]))
     .unwrap();
     project_creation_futures.push(create_async_future(
@@ -92,7 +92,7 @@ pub async fn setup_search_projects(
     let id = 2;
     let modify_json = serde_json::from_value(json!([
         { "op": "add", "path": "/categories", "value": DUMMY_CATEGORIES[0..2] },
-        { "op": "add", "path": "/initial_versions/0/server_only", "value": true },
+        { "op": "add", "path": "/initial_versions/0/environment", "value": "server_only" },
         { "op": "add", "path": "/name", "value": "Mysterious Project" },
     ]))
     .unwrap();
@@ -107,7 +107,7 @@ pub async fn setup_search_projects(
     let id = 3;
     let modify_json = serde_json::from_value(json!([
         { "op": "add", "path": "/categories", "value": DUMMY_CATEGORIES[0..3] },
-        { "op": "add", "path": "/initial_versions/0/server_only", "value": true },
+        { "op": "add", "path": "/initial_versions/0/environment", "value": "server_only" },
         { "op": "add", "path": "/initial_versions/0/game_versions", "value": ["1.20.4"] },
         { "op": "add", "path": "/name", "value": "Mysterious Project" },
         { "op": "add", "path": "/license_id", "value": "LicenseRef-All-Rights-Reserved" },
@@ -124,7 +124,7 @@ pub async fn setup_search_projects(
     let id = 4;
     let modify_json = serde_json::from_value(json!([
         { "op": "add", "path": "/categories", "value": DUMMY_CATEGORIES[0..3] },
-        { "op": "add", "path": "/initial_versions/0/client_only", "value": false },
+        { "op": "add", "path": "/initial_versions/0/environment", "value": "client_or_server" },
         { "op": "add", "path": "/initial_versions/0/game_versions", "value": ["1.20.5"] },
     ]))
     .unwrap();
@@ -139,7 +139,7 @@ pub async fn setup_search_projects(
     let id = 5;
     let modify_json = serde_json::from_value(json!([
         { "op": "add", "path": "/categories", "value": DUMMY_CATEGORIES[5..6] },
-        { "op": "add", "path": "/initial_versions/0/client_only", "value": false },
+        { "op": "add", "path": "/initial_versions/0/environment", "value": "client_or_server" },
         { "op": "add", "path": "/initial_versions/0/game_versions", "value": ["1.20.5"] },
         { "op": "add", "path": "/license_id", "value": "LGPL-3.0-or-later" },
     ]))
@@ -155,8 +155,7 @@ pub async fn setup_search_projects(
     let id = 6;
     let modify_json = serde_json::from_value(json!([
         { "op": "add", "path": "/categories", "value": DUMMY_CATEGORIES[5..6] },
-        { "op": "add", "path": "/initial_versions/0/client_only", "value": false },
+        { "op": "add", "path": "/initial_versions/0/environment", "value": "client_or_server_prefers_both" },
-        { "op": "add", "path": "/initial_versions/0/server_only", "value": true },
         { "op": "add", "path": "/license_id", "value": "LGPL-3.0-or-later" },
     ]))
     .unwrap();
@@ -173,8 +172,7 @@ pub async fn setup_search_projects(
     let id = 7;
     let modify_json = serde_json::from_value(json!([
         { "op": "add", "path": "/categories", "value": DUMMY_CATEGORIES[5..6] },
-        { "op": "add", "path": "/initial_versions/0/client_only", "value": false },
+        { "op": "add", "path": "/initial_versions/0/environment", "value": "client_or_server_prefers_both" },
-        { "op": "add", "path": "/initial_versions/0/server_only", "value": true },
         { "op": "add", "path": "/license_id", "value": "LGPL-3.0-or-later" },
         { "op": "add", "path": "/initial_versions/0/loaders", "value": ["forge"] },
         { "op": "add", "path": "/initial_versions/0/game_versions", "value": ["1.20.2"] },

apps/labrinth/tests/files/dummy_data.sql

@@ -68,7 +68,7 @@ INSERT INTO loader_field_enum_values(enum_id, value, metadata, ordering)
 VALUES (2, 'Ordering_Positive100', '{"type":"release","major":false}', 100);
 
 INSERT INTO loader_fields_loaders(loader_id, loader_field_id)
-SELECT l.id, lf.id FROM loaders l CROSS JOIN loader_fields lf WHERE lf.field IN ('game_versions','singleplayer', 'client_and_server', 'client_only', 'server_only')  ON CONFLICT DO NOTHING;
+SELECT l.id, lf.id FROM loaders l CROSS JOIN loader_fields lf WHERE lf.field IN ('game_versions','environment') ON CONFLICT DO NOTHING;
 
 INSERT INTO categories (id, category, project_type) VALUES
     (51, 'combat', 1),

apps/labrinth/tests/loader_fields.rs

@@ -114,7 +114,7 @@ async fn creating_loader_fields() {
                 Some(
                     serde_json::from_value(json!([{
                         "op": "remove",
-                        "path": "/singleplayer"
+                        "path": "/environment"
                     }]))
                     .unwrap(),
                 ),
@@ -273,12 +273,8 @@ async fn creating_loader_fields() {
                         "value": ["1.20.1", "1.20.2"]
                     }, {
                         "op": "add",
-                        "path": "/singleplayer",
+                        "path": "/environment",
-                        "value": false
+                        "value": "client_or_server_prefers_both"
-                    }, {
-                        "op": "add",
-                        "path": "/server_only",
-                        "value": true
                     }]))
                     .unwrap(),
                 ),
@@ -286,16 +282,17 @@ async fn creating_loader_fields() {
             )
             .await;
         assert_eq!(&v.fields["game_versions"], &json!(["1.20.1", "1.20.2"]));
-        assert_eq!(&v.fields["singleplayer"], &json!(false));
+        assert_eq!(
-        assert_eq!(&v.fields["server_only"], &json!(true));
+            &v.fields["environment"],
+            &json!("client_or_server_prefers_both")
+        );
         // - Patch
         let resp = api
             .edit_version(
                 alpha_version_id,
                 json!({
                     "game_versions": ["1.20.1", "1.20.2"],
-                    "singleplayer": false,
+                    "environment": "client_or_server_prefers_both"
-                    "server_only": true
                 }),
                 USER_USER_PAT,
             )
@@ -320,8 +317,8 @@ async fn creating_loader_fields() {
                     "value": ["1.20.5"]
                 }, {
                     "op": "add",
-                    "path": "/singleplayer",
+                    "path": "/environment",
-                    "value": false
+                    "value": "client_or_server"
                 }]))
                 .unwrap(),
             ),
@@ -357,8 +354,13 @@ async fn creating_loader_fields() {
             &project.fields["game_versions"],
             &[json!("1.20.1"), json!("1.20.2"), json!("1.20.5")]
         );
-        assert!(project.fields["singleplayer"].contains(&json!(false)));
+        assert!(
-        assert!(project.fields["singleplayer"].contains(&json!(true)));
+            project.fields["environment"].contains(&json!("client_or_server"))
+        );
+        assert!(
+            project.fields["environment"]
+                .contains(&json!("client_or_server_prefers_both"))
+        );
     })
     .await
 }
@@ -421,10 +423,7 @@ async fn get_available_loader_fields() {
                 fabric_loader_fields,
                 [
                     "game_versions",
-                    "singleplayer",
+                    "environment",
-                    "client_and_server",
-                    "client_only",
-                    "server_only",
                     "test_fabric_optional" // exists for testing
                 ]
                 .iter()
@@ -444,10 +443,7 @@ async fn get_available_loader_fields() {
                 mrpack_loader_fields,
                 [
                     "game_versions",
-                    "singleplayer",
+                    "environment",
-                    "client_and_server",
-                    "client_only",
-                    "server_only",
                     // mrpack has all the general fields as well as this
                     "mrpack_loaders"
                 ]

apps/labrinth/tests/search.rs

@@ -52,8 +52,11 @@ async fn search_projects() {
                     vec![1, 2, 3, 4],
                 ),
                 (json!([["project_types:modpack"]]), vec![4]),
-                (json!([["client_only:true"]]), vec![0, 2, 3, 7, 9]),
+                (json!([["environment:server_only"]]), vec![0, 2, 3]),
-                (json!([["server_only:true"]]), vec![0, 2, 3, 6, 7]),
+                (
+                    json!([["environment:client_or_server_prefers_both"]]),
+                    vec![6, 7],
+                ),
                 (json!([["open_source:true"]]), vec![0, 1, 2, 4, 5, 6, 7, 9]),
                 (json!([["license:MIT"]]), vec![1, 2, 4, 9]),
                 (json!([[r#"name:'Mysterious Project'"#]]), vec![2, 3]),