cleanup Mastodon API (resolves #804 and #865, partially resolves #492)

* Fix TS errors and warnings
* Fix ESLint errors and warnings
* Fix property typos in various places
* Fix property data conversion
* Add missing entity properties
* Normalize logging and reduce spam
* Check for missing request parameters
* Allow mastodon API to work with local debugging
* Safer error handling
* Fix quote-post detection

packages/backend/src/server/api/mastodon/MastodonLogger.ts

@@ -0,0 +1,39 @@
+/*
+ * SPDX-FileCopyrightText: hazelnoot and other Sharkey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Injectable } from '@nestjs/common';
+import Logger, { Data } from '@/logger.js';
+import { LoggerService } from '@/core/LoggerService.js';
+
+@Injectable()
+export class MastodonLogger {
+	public readonly logger: Logger;
+
+	constructor(loggerService: LoggerService) {
+		this.logger = loggerService.getLogger('masto-api');
+	}
+
+	public error(endpoint: string, error: Data): void {
+		this.logger.error(`Error in mastodon API endpoint ${endpoint}:`, error);
+	}
+}
+
+export function getErrorData(error: unknown): Data {
+	if (error == null) return {};
+	if (typeof(error) === 'string') return error;
+	if (typeof(error) === 'object') {
+		if ('response' in error) {
+			if (typeof(error.response) === 'object' && error.response) {
+				if ('data' in error.response) {
+					if (typeof(error.response.data) === 'object' && error.response.data) {
+						return error.response.data as Record<string, unknown>;
+					}
+				}
+			}
+		}
+		return error as Record<string, unknown>;
+	}
+	return { error };
+}