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6806: Adding support for the new use-case diagram type

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on-behalf-of: @Mermaid-Chart <hello@mermaidchart.com>
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omkarht
2025-10-09 18:48:11 +05:30
parent c728d864c8
commit 5fd06ccbac
43 changed files with 5405 additions and 11 deletions
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22
packages/parser/src/parse.ts
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@@ -1,8 +1,10 @@
import type { LangiumParser, ParseResult } from 'langium';
import type { Info, Packet, Pie, Architecture, GitGraph, Radar, Treemap } from './index.js';
import type { UsecaseParseResult } from './language/usecase/types.js';
export type DiagramAST = Info | Packet | Pie | Architecture | GitGraph | Radar;
export type DiagramAST = Info | Packet | Pie | Architecture | GitGraph | Radar | UsecaseParseResult;
export type LangiumDiagramAST = Info | Packet | Pie | Architecture | GitGraph | Radar;
const parsers: Record<string, LangiumParser> = {};
const initializers = {
@@ -41,6 +43,9 @@ const initializers = {
const parser = createTreemapServices().Treemap.parser.LangiumParser;
parsers.treemap = parser;
},
usecase: () => {
// ANTLR-based parser - no Langium parser needed
},
} as const;
export async function parse(diagramType: 'info', text: string): Promise<Info>;
@@ -50,7 +55,12 @@ export async function parse(diagramType: 'architecture', text: string): Promise<
export async function parse(diagramType: 'gitGraph', text: string): Promise<GitGraph>;
export async function parse(diagramType: 'radar', text: string): Promise<Radar>;
export async function parse(diagramType: 'treemap', text: string): Promise<Treemap>;
export async function parse(diagramType: 'usecase', text: string): Promise<UsecaseParseResult>;
export async function parse<T extends LangiumDiagramAST>(
diagramType: Exclude<keyof typeof initializers, 'usecase'>,
text: string
): Promise<T>;
export async function parse<T extends DiagramAST>(
diagramType: keyof typeof initializers,
text: string
@@ -59,11 +69,19 @@ export async function parse<T extends DiagramAST>(
if (!initializer) {
throw new Error(`Unknown diagram type: ${diagramType}`);
}
// Handle ANTLR-based parsers separately
if (diagramType === 'usecase') {
const { parseUsecaseWithAntlr } = await import('./language/usecase/index.js');
return parseUsecaseWithAntlr(text) as T;
}
if (!parsers[diagramType]) {
await initializer();
}
const parser: LangiumParser = parsers[diagramType];
const result: ParseResult<T> = parser.parse<T>(text);
const result: ParseResult<T extends LangiumDiagramAST ? T : never> =
parser.parse<T extends LangiumDiagramAST ? T : never>(text);
if (result.lexerErrors.length > 0 || result.parserErrors.length > 0) {
throw new MermaidParseError(result);
}