fix(platform): small fixes (#182)

Fixes channel_live_viewer_count column in users table and "null" being shown as stream title instead of nothing

platform/api/src/video_event_handler.rs

@@ -88,7 +88,7 @@ async fn handle_room_event<G: ApiGlobal>(global: &Arc<G>, event: event::Room, ti
 			connection_id: Some(connection_id),
 			..
 		}) => {
-			let res: Option<(common::database::Ulid,)> = sqlx::query_as("UPDATE users SET channel_active_connection_id = NULL, channel_live_viewer_count = NULL, channel_live_viewer_count_updated_at = NOW() WHERE channel_room_id = $1 AND channel_active_connection_id = $2 RETURNING id")
+			let res: Option<(common::database::Ulid,)> = sqlx::query_as("UPDATE users SET channel_active_connection_id = NULL, channel_live_viewer_count = 0, channel_live_viewer_count_updated_at = NOW() WHERE channel_room_id = $1 AND channel_active_connection_id = $2 RETURNING id")
 				.bind(Ulid::from(room_id.into_ulid()))
 				.bind(Ulid::from(connection_id.into_ulid()))
 				.fetch_optional(global.db().as_ref())

platform/migrations/20230825170300_init.up.sql

@@ -31,7 +31,7 @@ CREATE TABLE users (
     channel_room_id UUID NOT NULL,
     channel_active_connection_id UUID DEFAULT NULL,
     channel_title VARCHAR(256),
-    channel_live_viewer_count INT4,
+    channel_live_viewer_count INT4 NOT NULL DEFAULT 0,
     channel_live_viewer_count_updated_at TIMESTAMPTZ,
     channel_description TEXT,
     channel_links JSONB NOT NULL DEFAULT '[]'::JSONB,

platform/website/src/components/channel/title.svelte

@@ -46,4 +46,6 @@
 	});
 </script>
 
-{title}
+{#if title}
+	{title}
+{/if}

platform/website/src/components/side-nav/streamer-card.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
 	import { viewersToString } from "$lib/utils";
 	import { page } from "$app/stores";
-	import type { Channel, DisplayColor } from "$/gql/graphql";
+	import type { DisplayColor } from "$/gql/graphql";
 	import DefaultAvatar from "../user/default-avatar.svelte";
 	import { fade } from "svelte/transition";