feat(admin): allow system DMs to all users (#3073)

fluxer_admin/openapi-admin.json

@@ -5435,7 +5435,7 @@
 						"content": {"application/json": {"schema": {"$ref": "#/components/schemas/Error"}}}
 					}
 				},
-				"description": "Queue a worker job that delivers the same content to every listed user as a direct message from the system account. Progress is observable through the Jobs admin resource (task_type=sendSystemDm), and an in-flight broadcast is stopped by cancelling that job. Requires SYSTEM_DM_SEND permission.",
+				"description": "Queue a worker job that delivers the same content to every listed user, or to every user when all_users is set, as a direct message from the system account. Progress is observable through the Jobs admin resource (task_type=sendSystemDm), and an in-flight broadcast is stopped by cancelling that job. Requires SYSTEM_DM_SEND permission.",
 				"security": [{"adminApiKey": []}],
 				"requestBody": {
 					"required": true,
@@ -10150,20 +10150,25 @@
 						"description": "Message content to send to each recipient"
 					},
 					"user_ids": {
+						"description": "Recipient user IDs. Each receives the same content as a system DM.",
 						"minItems": 1,
 						"maxItems": 10000,
 						"type": "array",
-						"items": {"$ref": "#/components/schemas/SnowflakeType"},
-						"description": "Recipient user IDs. Each receives the same content as a system DM."
+						"items": {"$ref": "#/components/schemas/SnowflakeType"}
+					},
+					"all_users": {
+						"description": "Send to every user account, skipping bots, system accounts, and deleted or disabled accounts",
+						"type": "boolean"
 					}
 				},
-				"required": ["content", "user_ids"]
+				"required": ["content"]
 			},
 			"SendSystemDmResponse": {
 				"type": "object",
 				"properties": {
 					"recipient_count": {
-						"description": "Number of recipients the worker job was queued to deliver to",
+						"nullable": true,
+						"description": "Number of recipients the worker job was queued to deliver to, or null when sending to all users",
 						"allOf": [{"$ref": "#/components/schemas/Int32Type"}]
 					}
 				},

fluxer_admin/src/api/system_dm.rs

@@ -8,13 +8,18 @@ use super::types::SendSystemDmResponse;
 impl AdminApiClient {
     pub async fn send_system_dm(
         &self,
-        user_ids: &[String],
+        user_ids: Option<&[String]>,
         content: &str,
     ) -> ApiResult<SendSystemDmResponse> {
         let body = generated_types::SendSystemDmRequest {
             content: generated_types::SendSystemDmRequestContent::try_from(content)
                 .map_err(|e| ApiError::Parse(e.to_string()))?,
-            user_ids: user_ids.iter().map(|id| snowflake(id)).collect(),
+            user_ids: user_ids
+                .unwrap_or_default()
+                .iter()
+                .map(|id| snowflake(id))
+                .collect(),
+            all_users: user_ids.is_none().then_some(true),
         };
         let response = self
             .generated()

fluxer_admin/src/api/types/system_dm.rs

@@ -4,5 +4,5 @@ use serde::{Deserialize, Serialize};
 
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct SendSystemDmResponse {
-    pub recipient_count: i64,
+    pub recipient_count: Option<i64>,
 }

fluxer_admin/src/routes/message_actions.rs

@@ -171,7 +171,8 @@ pub(crate) async fn system_dms_post(
     let flash = if let Some(content) = content.as_deref()
         && !user_ids.is_empty()
     {
-        match client.send_system_dm(&user_ids, content).await {
+        let recipients = (user_ids != ["*"]).then_some(user_ids.as_slice());
+        match client.send_system_dm(recipients, content).await {
             Ok(_) => FlashData::success("System DM sent"),
             Err(error) => {
                 tracing::warn!(%error, "admin API request failed: send system DM");

fluxer_admin/src/templates/pages/system_dm.rs

@@ -58,7 +58,7 @@ pub fn system_dm_page(
                         (form_field_group(
                             "Recipient user IDs", "system-dm-user-ids",
                             true, None,
-                            Some("One per line. Snowflake IDs only."),
+                            Some("One per line. Snowflake IDs only, or a single * to send to every user."),
                             html! {
                                 textarea id="system-dm-user-ids" name="user_ids"
                                     required rows="10"