Add server config for mergable extensions

frontend/sync-client/src/consts.ts

@@ -1,5 +1,3 @@
-export const MERGABLE_FILE_TYPES = ["md", "txt"];
-
 export const TIMEOUT_FOR_MERGING_HISTORY_ENTRIES_IN_SECONDS = 60;
 export const DIFF_CACHE_SIZE_MB = 2;
 export const MAX_LOG_MESSAGE_COUNT = 100000;

frontend/sync-client/src/file-operations/file-operations.ts

@@ -6,6 +6,7 @@ import type { TextWithCursors } from "reconcile-text";
 import { reconcile } from "reconcile-text";
 import { isFileTypeMergable } from "../utils/is-file-type-mergable";
 import { isBinary } from "../utils/is-binary";
+import type { ServerConfig } from "../services/server-config";
 
 export class FileOperations {
 	private static readonly PARENTHESES_REGEX = / \((\d+)\)$/;
@@ -15,6 +16,7 @@ export class FileOperations {
 		private readonly logger: Logger,
 		private readonly database: Database,
 		fs: FileSystemOperations,
+		private readonly serverConfig: ServerConfig,
 		private readonly nativeLineEndings = "\n"
 	) {
 		this.fs = new SafeFileSystemOperations(fs, logger);
@@ -89,7 +91,10 @@ export class FileOperations {
 		}
 
 		if (
-			!isFileTypeMergable(path) ||
+			!isFileTypeMergable(
+				path,
+				this.serverConfig.getConfig().mergeableFileExtensions
+			) ||
 			isBinary(expectedContent) ||
 			isBinary(newContent)
 		) {

frontend/sync-client/src/services/server-config.ts

@@ -0,0 +1,67 @@
+import { createPromise } from "../utils/create-promise";
+import type { SyncService } from "./sync-service";
+import type { PingResponse } from "./types/PingResponse";
+
+export interface ServerConfigData {
+	mergeableFileExtensions: string[];
+}
+
+export class ServerConfig {
+	private response: Promise<PingResponse> | undefined;
+	private config: ServerConfigData | undefined;
+
+	public constructor(private readonly syncService: SyncService) {}
+
+	public async initialize(): Promise<void> {
+		this.response = this.syncService.ping();
+		this.config = await this.response;
+	}
+
+	public async checkConnection(forceUpdate = false): Promise<{
+		isSuccessful: boolean;
+		message: string;
+	}> {
+		try {
+			let { response } = this;
+			if (!response && !forceUpdate) {
+				throw new Error("ServerConfig not initialized");
+			} else if (forceUpdate) {
+				response = this.response = this.syncService.ping();
+			}
+
+			// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+			const result: PingResponse = (await response)!; // it must be defined, otherwise we would have thrown above
+			this.config = result;
+
+			if (result.isAuthenticated) {
+				return {
+					isSuccessful: true,
+					message: `Successfully connected to server (version: ${result.serverVersion}) and authenticated`
+				};
+			}
+
+			return {
+				isSuccessful: false,
+				message: `Successfully connected to server (version: ${result.serverVersion}) but failed to authenticate`
+			};
+		} catch (e) {
+			return {
+				isSuccessful: false,
+				message: `Failed to connect to server: ${e}`
+			};
+		}
+	}
+
+	public getConfig(): ServerConfigData {
+		if (!this.config) {
+			throw new Error("ServerConfig not initialized");
+		}
+
+		return this.config;
+	}
+
+	public reset(): void {
+		this.response = undefined;
+		this.config = undefined;
+	}
+}

frontend/sync-client/src/services/sync-service.ts

@@ -302,40 +302,24 @@ export class SyncService {
 		});
 	}
 
-	public async checkConnection(): Promise<{
-		isSuccessful: boolean;
-		message: string;
-	}> {
-		try {
-			const response = await this.pingClient(this.getUrl("/ping"), {
-				headers: this.getDefaultHeaders()
-			});
-			const result: PingResponse | SerializedError =
-				(await response.json()) as PingResponse | SerializedError; // eslint-disable-line @typescript-eslint/no-unsafe-type-assertion
+	public async ping(): Promise<PingResponse> {
+		const response = await this.pingClient(this.getUrl("/ping"), {
+			headers: this.getDefaultHeaders()
+		});
+		const result: PingResponse | SerializedError =
+			(await response.json()) as PingResponse | SerializedError; // eslint-disable-line @typescript-eslint/no-unsafe-type-assertion
 
-			if ("errorType" in result) {
-				throw new Error(
-					`Failed to ping server: ${SyncService.formatError(result)}`
-				);
-			}
-
-			if (result.isAuthenticated) {
-				return {
-					isSuccessful: true,
-					message: `Successfully connected to server (version: ${result.serverVersion}) and authenticated`
-				};
-			}
-
-			return {
-				isSuccessful: false,
-				message: `Successfully connected to server (version: ${result.serverVersion}) but failed to authenticate`
-			};
-		} catch (e) {
-			return {
-				isSuccessful: false,
-				message: `Failed to connect to server: ${e}`
-			};
+		if ("errorType" in result) {
+			throw new Error(
+				`Failed to ping server: ${SyncService.formatError(result)}`
+			);
 		}
+
+		this.logger.debug(
+			`Pinged server, got response: ${JSON.stringify(result)}`
+		);
+
+		return result;
 	}
 
 	private getUrl(path: string): string {

frontend/sync-client/src/services/types/PingResponse.ts

@@ -13,4 +13,8 @@ export interface PingResponse {
 	 * header.
 	 */
 	isAuthenticated: boolean;
+	/**
+	 * List of file extensions that are allowed to be merged.
+	 */
+	mergeableFileExtensions: string[];
 }

frontend/sync-client/src/sync-client.ts

@@ -25,6 +25,7 @@ import { FileChangeNotifier } from "./sync-operations/file-change-notifier";
 import { FixedSizeDocumentCache } from "./utils/data-structures/fix-sized-cache";
 import { setUpTelemetry } from "./utils/set-up-telemetry";
 import { DIFF_CACHE_SIZE_MB } from "./consts";
+import { ServerConfig } from "./services/server-config";
 
 export class SyncClient {
 	private hasStartedOfflineSync = false;
@@ -46,6 +47,7 @@ export class SyncClient {
 		private readonly fileChangeNotifier: FileChangeNotifier,
 		private readonly contentCache: FixedSizeDocumentCache,
 		private readonly fileOperations: FileOperations,
+		private readonly serverConfig: ServerConfig,
 		private readonly persistence: PersistenceProvider<
 			Partial<{
 				settings: Partial<SyncSettings>;
@@ -139,10 +141,13 @@ export class SyncClient {
 			fetch
 		);
 
+		const serverConfig = new ServerConfig(syncService);
+
 		const fileOperations = new FileOperations(
 			logger,
 			database,
 			fs,
+			serverConfig,
 			nativeLineEndings
 		);
 
@@ -156,7 +161,8 @@ export class SyncClient {
 			syncService,
 			fileOperations,
 			history,
-			contentCache
+			contentCache,
+			serverConfig
 		);
 
 		const webSocketManager = new WebSocketManager(
@@ -197,6 +203,7 @@ export class SyncClient {
 			fileChangeNotifier,
 			contentCache,
 			fileOperations,
+			serverConfig,
 			persistence
 		);
 
@@ -213,6 +220,8 @@ export class SyncClient {
 		}
 		this.hasStarted = true;
 
+		await this.serverConfig.initialize();
+
 		if (
 			!this.unloadTelemetry &&
 			this.settings.getSettings().enableTelemetry
@@ -260,7 +269,7 @@ export class SyncClient {
 	public async checkConnection(): Promise<NetworkConnectionStatus> {
 		this.checkIfDestroyed();
 
-		const server = await this.syncService.checkConnection();
+		const server = await this.serverConfig.checkConnection(true);
 		return {
 			isSuccessful: server.isSuccessful,
 			serverMessage: server.message,

frontend/sync-client/src/sync-operations/unrestricted-syncer.ts

@@ -32,6 +32,7 @@ import type { DocumentVersionWithoutContent } from "../services/types/DocumentVe
 import type { FixedSizeDocumentCache } from "../utils/data-structures/fix-sized-cache";
 import { isFileTypeMergable } from "../utils/is-file-type-mergable";
 import { isBinary } from "../utils/is-binary";
+import type { ServerConfig } from "../services/server-config";
 
 export class UnrestrictedSyncer {
 	private ignorePatterns: RegExp[];
@@ -43,7 +44,8 @@ export class UnrestrictedSyncer {
 		private readonly syncService: SyncService,
 		private readonly operations: FileOperations,
 		private readonly history: SyncHistory,
-		private readonly contentCache: FixedSizeDocumentCache
+		private readonly contentCache: FixedSizeDocumentCache,
+		private readonly serverConfig: ServerConfig
 	) {
 		this.ignorePatterns = globsToRegexes(
 			this.settings.getSettings().ignorePatterns,
@@ -200,7 +202,10 @@ export class UnrestrictedSyncer {
 			if (areThereLocalChanges) {
 				const isText =
 					!isBinary(contentBytes) &&
-					isFileTypeMergable(document.relativePath);
+					isFileTypeMergable(
+						document.relativePath,
+						this.serverConfig.getConfig().mergeableFileExtensions
+					);
 				const cachedVersion = this.contentCache.get(
 					document.metadata.parentVersionId
 				);
@@ -547,7 +552,13 @@ export class UnrestrictedSyncer {
 		contentBytes: Uint8Array,
 		filePath: RelativePath
 	): void {
-		if (isFileTypeMergable(filePath) && !isBinary(contentBytes)) {
+		if (
+			isFileTypeMergable(
+				filePath,
+				this.serverConfig.getConfig().mergeableFileExtensions
+			) &&
+			!isBinary(contentBytes)
+		) {
 			this.contentCache.put(updateId, contentBytes);
 		}
 	}

frontend/sync-client/src/utils/is-file-type-mergable.test.ts

@@ -2,41 +2,72 @@ import { describe, it } from "node:test";
 import assert from "node:assert";
 import { isFileTypeMergable } from "./is-file-type-mergable";
 
+const mergableExtensions = ["md", "txt"];
 describe("isFileTypeMergable", () => {
 	it("should return true for .md files", () => {
-		assert.strictEqual(isFileTypeMergable(".md"), true);
-		assert.strictEqual(isFileTypeMergable("hi.md"), true);
+		assert.strictEqual(isFileTypeMergable(".md", mergableExtensions), true);
 		assert.strictEqual(
-			isFileTypeMergable("my/path/to/my/document.md"),
+			isFileTypeMergable("hi.md", mergableExtensions),
+			true
+		);
+		assert.strictEqual(
+			isFileTypeMergable("my/path/to/my/document.md", mergableExtensions),
 			true
 		);
 	});
 
 	it("should return true for .txt files", () => {
-		assert.strictEqual(isFileTypeMergable(".txt"), true);
-		assert.strictEqual(isFileTypeMergable("hi.txt"), true);
 		assert.strictEqual(
-			isFileTypeMergable("my/path/to/my/document.txt"),
+			isFileTypeMergable(".txt", mergableExtensions),
+			true
+		);
+		assert.strictEqual(
+			isFileTypeMergable("hi.txt", mergableExtensions),
+			true
+		);
+		assert.strictEqual(
+			isFileTypeMergable(
+				"my/path/to/my/document.txt",
+				mergableExtensions
+			),
 			true
 		);
 	});
 
 	it("should be case insensitive", () => {
-		assert.strictEqual(isFileTypeMergable("hi.MD"), true);
 		assert.strictEqual(
-			isFileTypeMergable("my/path/to/my/DOCUMENT.MD"),
+			isFileTypeMergable("hi.MD", mergableExtensions),
 			true
 		);
-		assert.strictEqual(isFileTypeMergable("hi.TXT"), true);
 		assert.strictEqual(
-			isFileTypeMergable("my/path/to/my/DOCUMENT.TXT"),
+			isFileTypeMergable("my/path/to/my/DOCUMENT.MD", mergableExtensions),
+			true
+		);
+		assert.strictEqual(
+			isFileTypeMergable("hi.TXT", mergableExtensions),
+			true
+		);
+		assert.strictEqual(
+			isFileTypeMergable(
+				"my/path/to/my/DOCUMENT.TXT",
+				mergableExtensions
+			),
 			true
 		);
 	});
 
 	it("should return false for non-mergable file types", () => {
-		assert.strictEqual(isFileTypeMergable(".json"), false);
-		assert.strictEqual(isFileTypeMergable("HELLO.JSON"), false);
-		assert.strictEqual(isFileTypeMergable("my/config.yml"), false);
+		assert.strictEqual(
+			isFileTypeMergable(".json", mergableExtensions),
+			false
+		);
+		assert.strictEqual(
+			isFileTypeMergable("HELLO.JSON", mergableExtensions),
+			false
+		);
+		assert.strictEqual(
+			isFileTypeMergable("my/config.yml", mergableExtensions),
+			false
+		);
 	});
 });

frontend/sync-client/src/utils/is-file-type-mergable.ts

@@ -1,8 +1,9 @@
-import { MERGABLE_FILE_TYPES } from "../consts";
-
-export function isFileTypeMergable(pathOrFileName: string): boolean {
+export function isFileTypeMergable(
+	pathOrFileName: string,
+	mergeableExtensions: string[]
+): boolean {
 	const parts = pathOrFileName.split(".");
 	const fileExtension = parts.at(-1) ?? "";
 
-	return MERGABLE_FILE_TYPES.includes(fileExtension.toLowerCase());
+	return mergeableExtensions.includes(fileExtension.toLowerCase());
 }

sync-server/config-e2e.yml

@@ -8,6 +8,9 @@ server:
   max_body_size_mb: 512
   max_clients_per_vault: 256
   response_timeout_seconds: 60
+  mergeable_file_extensions:
+  - md
+  - txt
 users:
   user_configs:
   - name: admin

sync-server/src/config/server_config.rs

@@ -2,8 +2,8 @@ use log::debug;
 use serde::{Deserialize, Serialize};
 
 use crate::consts::{
-    DEFAULT_HOST, DEFAULT_MAX_BODY_SIZE_MB, DEFAULT_MAX_CLIENTS_PER_VAULT, DEFAULT_PORT,
-    DEFAULT_RESPONSE_TIMEOUT_SECONDS,
+    DEFAULT_HOST, DEFAULT_MAX_BODY_SIZE_MB, DEFAULT_MAX_CLIENTS_PER_VAULT,
+    DEFAULT_MERGEABLE_FILE_EXTENSIONS, DEFAULT_PORT, DEFAULT_RESPONSE_TIMEOUT_SECONDS,
 };
 
 #[derive(Debug, Deserialize, Serialize, Clone, Default)]
@@ -22,6 +22,9 @@ pub struct ServerConfig {
 
     #[serde(default = "default_response_timeout_seconds")]
     pub response_timeout_seconds: u64,
+
+    #[serde(default = "default_mergeable_file_extensions")]
+    pub mergeable_file_extensions: Vec<String>,
 }
 
 fn default_host() -> String {
@@ -48,3 +51,11 @@ fn default_response_timeout_seconds() -> u64 {
     debug!("Using default response timeout (seconds): {DEFAULT_RESPONSE_TIMEOUT_SECONDS}");
     DEFAULT_RESPONSE_TIMEOUT_SECONDS
 }
+
+fn default_mergeable_file_extensions() -> Vec<String> {
+    debug!("Using default mergeable file extensions: {DEFAULT_MERGEABLE_FILE_EXTENSIONS:?}");
+    DEFAULT_MERGEABLE_FILE_EXTENSIONS
+        .iter()
+        .map(|s| (*s).to_owned())
+        .collect()
+}

sync-server/src/consts.rs

@@ -14,3 +14,5 @@ pub const DEFAULT_MAX_CLIENTS_PER_VAULT: usize = 256;
 
 pub const DEFAULT_LOG_DIRECTORY: &str = "logs";
 pub const DEFAULT_LOG_ROTATION_INTERVAL: Duration = Duration::from_secs(60 * 60 * 24); // 1 day
+
+pub const DEFAULT_MERGEABLE_FILE_EXTENSIONS: &[&str] = &["md", "txt"];

sync-server/src/server/ping.rs

@@ -33,5 +33,6 @@ pub async fn ping(
     Ok(Json(PingResponse {
         server_version: env!("CARGO_PKG_VERSION").to_owned(),
         is_authenticated,
+        mergeable_file_extensions: state.config.server.mergeable_file_extensions.clone(),
     }))
 }

sync-server/src/server/responses.rs

@@ -16,6 +16,9 @@ pub struct PingResponse {
     /// Whether the client is authenticated based on the sent Authorization
     /// header.
     pub is_authenticated: bool,
+
+    /// List of file extensions that are allowed to be merged.
+    pub mergeable_file_extensions: Vec<String>,
 }
 
 /// Response to a fetch latest documents request.

sync-server/src/server/update_document.rs

@@ -185,8 +185,10 @@ async fn update_document(
         )));
     }
 
-    let are_all_participants_mergable = is_file_type_mergable(&sanitized_relative_path)
-        && !is_binary(&parent_document.content)
+    let are_all_participants_mergable = is_file_type_mergable(
+        &sanitized_relative_path,
+        &state.config.server.mergeable_file_extensions,
+    ) && !is_binary(&parent_document.content)
         && !is_binary(&latest_version.content)
         && !is_binary(&content);
 

sync-server/src/utils/is_file_type_mergable.rs

@@ -1,7 +1,10 @@
-pub fn is_file_type_mergable(path_or_file_name: &str) -> bool {
+pub fn is_file_type_mergable(path_or_file_name: &str, mergeable_extensions: &[String]) -> bool {
     let file_extension = path_or_file_name.split('.').next_back().unwrap_or_default();
+    let file_extension_lower = file_extension.to_lowercase();
 
-    matches!(file_extension.to_lowercase().as_str(), "md" | "txt")
+    mergeable_extensions
+        .iter()
+        .any(|ext| ext.to_lowercase() == file_extension_lower)
 }
 
 #[cfg(test)]
@@ -10,14 +13,22 @@ mod tests {
 
     #[test]
     fn test_is_file_type_mergable() {
-        assert!(is_file_type_mergable(".md"));
-        assert!(is_file_type_mergable("hi.md"));
-        assert!(is_file_type_mergable("my/path/to/my/document.md"));
-        assert!(is_file_type_mergable("hi.MD"));
-        assert!(is_file_type_mergable("my/path/to/my/DOCUMENT.MD"));
+        let mergeable = vec!["md".to_owned(), "txt".to_owned()];
 
-        assert!(!is_file_type_mergable(".json"));
-        assert!(!is_file_type_mergable("HELLO.JSON"));
-        assert!(!is_file_type_mergable("my/config.yml"));
+        assert!(is_file_type_mergable(".md", &mergeable));
+        assert!(is_file_type_mergable("hi.md", &mergeable));
+        assert!(is_file_type_mergable(
+            "my/path/to/my/document.md",
+            &mergeable
+        ));
+        assert!(is_file_type_mergable("hi.MD", &mergeable));
+        assert!(is_file_type_mergable(
+            "my/path/to/my/DOCUMENT.MD",
+            &mergeable
+        ));
+
+        assert!(!is_file_type_mergable(".json", &mergeable));
+        assert!(!is_file_type_mergable("HELLO.JSON", &mergeable));
+        assert!(!is_file_type_mergable("my/config.yml", &mergeable));
     }
 }