feat: Add packet diagram

packages/parser/langium-config.json

@@ -5,6 +5,11 @@
       "id": "info",
       "grammar": "src/language/info/info.langium",
       "fileExtensions": [".mmd", ".mermaid"]
+    },
+    {
+      "id": "packet",
+      "grammar": "src/language/packet/packet.langium",
+      "fileExtensions": [".mmd", ".mermaid"]
     }
   ],
   "mode": "production",

packages/parser/src/index.ts

@@ -1,3 +1,3 @@
-export type { Info } from './language/index.js';
+export type { Info, Packet } from './language/index.js';
 export type { DiagramAST } from './parse.js';
 export { parse, MermaidParseError } from './parse.js';

packages/parser/src/language/index.ts

@@ -4,3 +4,4 @@ export * from './generated/module.js';
 
 export * from './common/index.js';
 export * from './info/index.js';
+export * from './packet/index.js';

packages/parser/src/language/packet/index.ts

@@ -0,0 +1 @@
+export * from './module.js';

packages/parser/src/language/packet/module.ts

@@ -0,0 +1,72 @@
+import type {
+  DefaultSharedModuleContext,
+  LangiumServices,
+  LangiumSharedServices,
+  Module,
+  PartialLangiumServices,
+} from 'langium';
+import { EmptyFileSystem, createDefaultModule, createDefaultSharedModule, inject } from 'langium';
+
+import { CommonLexer } from '../common/lexer.js';
+import { MermaidGeneratedSharedModule, PacketGeneratedModule } from '../generated/module.js';
+import { PacketTokenBuilder } from './tokenBuilder.js';
+import { CommonValueConverter } from '../common/valueConverter.js';
+
+/**
+ * Declaration of `Packet` services.
+ */
+type PacketAddedServices = {
+  parser: {
+    Lexer: CommonLexer;
+    TokenBuilder: PacketTokenBuilder;
+    ValueConverter: CommonValueConverter;
+  };
+};
+
+/**
+ * Union of Langium default services and `Packet` services.
+ */
+export type PacketServices = LangiumServices & PacketAddedServices;
+
+/**
+ * Dependency injection module that overrides Langium default services and
+ * contributes the declared `Packet` services.
+ */
+export const PacketModule: Module<PacketServices, PartialLangiumServices & PacketAddedServices> = {
+  parser: {
+    Lexer: (services: PacketServices) => new CommonLexer(services),
+    TokenBuilder: () => new PacketTokenBuilder(),
+    ValueConverter: () => new CommonValueConverter(),
+  },
+};
+
+/**
+ * Create the full set of services required by Langium.
+ *
+ * First inject the shared services by merging two modules:
+ *  - Langium default shared services
+ *  - Services generated by langium-cli
+ *
+ * Then inject the language-specific services by merging three modules:
+ *  - Langium default language-specific services
+ *  - Services generated by langium-cli
+ *  - Services specified in this file
+ * @param context - Optional module context with the LSP connection
+ * @returns An object wrapping the shared services and the language-specific services
+ */
+export function createPacketServices(context: DefaultSharedModuleContext = EmptyFileSystem): {
+  shared: LangiumSharedServices;
+  Packet: PacketServices;
+} {
+  const shared: LangiumSharedServices = inject(
+    createDefaultSharedModule(context),
+    MermaidGeneratedSharedModule
+  );
+  const Packet: PacketServices = inject(
+    createDefaultModule({ shared }),
+    PacketGeneratedModule,
+    PacketModule
+  );
+  shared.ServiceRegistry.register(Packet);
+  return { shared, Packet };
+}

packages/parser/src/language/packet/packet.langium

@@ -0,0 +1,14 @@
+grammar Packet
+import "../common/common";
+
+entry Packet:
+	"packet-beta" NEWLINE*
+  TitleAndAccessibilities?
+  (blocks+=Block)*;
+
+Block:
+    start=INT ('-' end=INT)? ':' label=STRING;
+
+hidden terminal WS: /\s+/;
+terminal INT returns number: /[0-9]+/;
+terminal STRING: /"[^"]*"|'[^']*'/;

packages/parser/src/language/packet/tokenBuilder.ts

@@ -0,0 +1,7 @@
+import { MermaidTokenBuilder } from '../common/index.js';
+
+export class PacketTokenBuilder extends MermaidTokenBuilder {
+  public constructor() {
+    super(['packet-beta']);
+  }
+}

packages/parser/src/parse.ts

@@ -1,8 +1,8 @@
 import type { LangiumParser, ParseResult } from 'langium';
-import type { Info } from './index.js';
-import { createInfoServices } from './language/index.js';
+import type { Info, Packet } from './index.js';
+import { createInfoServices, createPacketServices } from './language/index.js';
 
-export type DiagramAST = Info;
+export type DiagramAST = Info | Packet;
 
 const parsers: Record<string, LangiumParser> = {};
 
@@ -13,8 +13,13 @@ const initializers = {
     const parser = createInfoServices().Info.parser.LangiumParser;
     parsers['info'] = parser;
   },
+  packet: () => {
+    const parser = createPacketServices().Packet.parser.LangiumParser;
+    parsers['packet'] = parser;
+  },
 } as const;
 export function parse(diagramType: 'info', text: string): Info;
+export function parse(diagramType: 'packet', text: string): Packet;
 export function parse<T extends DiagramAST>(
   diagramType: keyof typeof initializers,
   text: string