initial

packages/shared/src/supabase/bytea.ts

@@ -0,0 +1,25 @@
+// Postgres bytea <-> Uint8Array.
+//
+// PostgREST serializes bytea as a "\x<hex>" string in JSON. When inserting via
+// the Supabase client, sending the same literal back round-trips cleanly.
+
+export function bytesToPgHex(bytes: Uint8Array): string {
+  let out = '\\x';
+  for (let i = 0; i < bytes.length; i++) {
+    out += bytes[i]!.toString(16).padStart(2, '0');
+  }
+  return out;
+}
+
+export function pgHexToBytes(hex: string): Uint8Array {
+  if (!hex.startsWith('\\x')) {
+    throw new Error(`not a postgres hex literal: ${hex.slice(0, 8)}…`);
+  }
+  const stripped = hex.slice(2);
+  if (stripped.length % 2 !== 0) throw new Error('odd hex length');
+  const out = new Uint8Array(stripped.length / 2);
+  for (let i = 0; i < stripped.length; i += 2) {
+    out[i / 2] = Number.parseInt(stripped.slice(i, i + 2), 16);
+  }
+  return out;
+}

packages/shared/src/supabase/client.ts

@@ -0,0 +1,17 @@
+import { createClient as createSupabaseClient, type SupabaseClient } from '@supabase/supabase-js';
+
+import type { Database, SupabaseConfig } from './types.js';
+
+// Typed client alias used throughout the app.
+export type AppSupabaseClient = SupabaseClient<Database>;
+
+export function createClient(config: SupabaseConfig): AppSupabaseClient {
+  return createSupabaseClient<Database>(config.url, config.anonKey, {
+    auth: {
+      storage: config.sessionStorage,
+      autoRefreshToken: true,
+      persistSession: true,
+      detectSessionInUrl: config.detectSessionInUrl ?? false,
+    },
+  });
+}

packages/shared/src/supabase/index.ts

@@ -0,0 +1,3 @@
+export * from './bytea.js';
+export * from './client.js';
+export * from './types.js';

packages/shared/src/supabase/types.ts

@@ -0,0 +1,25 @@
+import type { Database } from '@chat-app/db-types';
+
+export type { Database };
+
+// Storage contract used by Supabase auth. Both `expo-secure-store` and
+// `@tauri-apps/plugin-store` can be wrapped to satisfy this.
+export interface KeyValueStore {
+  getItem(key: string): Promise<string | null>;
+  setItem(key: string, value: string): Promise<void>;
+  removeItem(key: string): Promise<void>;
+}
+
+export interface SupabaseConfig {
+  url: string;
+  anonKey: string;
+  sessionStorage: KeyValueStore;
+  // Desktop Tauri webview may need this true to parse magic-link callbacks.
+  detectSessionInUrl?: boolean;
+}
+
+export type DevicePlatform = Database['public']['Enums']['device_platform'];
+export type PresenceState = Database['public']['Enums']['presence_state'];
+export type FriendshipStatus = Database['public']['Enums']['friendship_status'];
+export type MemberRole = Database['public']['Enums']['member_role'];
+export type ConversationType = Database['public']['Enums']['conversation_type'];