fix(guild): import all template channel types, fetch on desktop (#3473)

packages/desktop_ipc/src/OtherPlatformTemplateContract.ts

@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+export const DESKTOP_OTHER_PLATFORM_TEMPLATE_CHANNELS = Object.freeze({
+	fetch: 'desktop-other-platform-template:fetch',
+} as const);
+
+const OTHER_PLATFORM_TEMPLATE_CODE_PATTERN = /^[A-Za-z0-9]{1,64}$/;
+
+export function isOtherPlatformTemplateCode(value: unknown): value is string {
+	return typeof value === 'string' && OTHER_PLATFORM_TEMPLATE_CODE_PATTERN.test(value);
+}
+
+export const OtherPlatformTemplateFetchFailure = Object.freeze({
+	INVALID_CODE: 'invalid_code',
+	NOT_FOUND: 'not_found',
+	RATE_LIMITED: 'rate_limited',
+	NETWORK: 'network',
+	INVALID_RESPONSE: 'invalid_response',
+} as const);
+
+export type OtherPlatformTemplateFetchFailure =
+	(typeof OtherPlatformTemplateFetchFailure)[keyof typeof OtherPlatformTemplateFetchFailure];
+
+export interface OtherPlatformTemplateFetchSuccess {
+	readonly ok: true;
+	readonly template: Readonly<Record<string, unknown>>;
+}
+
+export interface OtherPlatformTemplateFetchError {
+	readonly ok: false;
+	readonly failure: OtherPlatformTemplateFetchFailure;
+}
+
+export type OtherPlatformTemplateFetchResult = OtherPlatformTemplateFetchSuccess | OtherPlatformTemplateFetchError;
+
+export interface OtherPlatformTemplateAPI {
+	fetch: (code: string) => Promise<OtherPlatformTemplateFetchResult>;
+}